TWI604740B - Method and apparatus for seamlessly switching reception between multimedia streams in a wireless communication system - Google Patents

Description

Method and apparatus for seamlessly switching reception between multimedia streams in a wireless communication system

The present invention relates generally to communications, and more particularly to techniques for switching reception between multimedia streams.

A wireless communication system can simultaneously transmit multiple streams of data for broadcast, multicast, and/or unicast services. A data stream is a stream of data that can be independently received by a wireless device. A broadcast transmission is transmitted to all wireless devices in the coverage, a multicast transmission is transmitted to a group of wireless devices, and a single broadcast transmission is transmitted to a particular wireless device. For example, a base station can transmit a number of data streams for multimedia (e.g., television) programming over a terrestrial radio link for reception by wireless devices within the coverage of the base station.

A wireless device can only receive one of the multimedia programs transmitted by the base station at any given time. In order to receive the program, the wireless device identifies all data streams transmitted by the base station for the program, and determines relevant parameters of each data stream of interest (eg, how to transmit each data stream and where to transmit), according to the The parameters are decoded to decode each data stream, and each decoded data stream is further processed to produce an output suitable for display to the user. The wireless device continues to decode the data stream for selecting the program and provides the decoded data in streaming form as long as the program is selected for reception.

If the user chooses to receive another multimedia program, typically the wireless device needs to perform a set of tasks to acquire, decode, and present the new program. The tasks may include terminating the decoding and processing of the current program, identifying all data streams transmitted by the base station for the new program, determining relevant parameters for each data stream for the new program, and decoding each new data based on the parameters. flow. The wireless device may use the last decoded frame of the old program to "stop" the display or "clear" the display using a blue or black background during its execution of the task for the new program. For some wireless systems, the time required to acquire and decode a new program can be relatively long (eg, more than one second). In this case, stopping or emptying the display for the duration of the entire time may be "annoying" to the user.

Therefore, there is a need in the art for a better technique for switching reception between multimedia streams.

This document describes techniques for seamlessly switching reception between multimedia programs/streams. These technologies can provide users with better program switching experience and faster acquisition speed in some cases. Such techniques include "continuous decoding" of currently selected programs, "early decoding" of expected selection of programs, and time compensated video and audio transmission.

For continuous decoding, a wireless device continues to receive, decode, decompress, and (as appropriate) display a current program (even after selecting a new program) until additional information needed to decode the new program is received. In stream processing content, "decoding" means physical layer receiver processing or channel decoding, and "decompressing" means higher level receiver processing or source decoding (eg, video and audio decompression). After obtaining the additional information, the wireless device decodes the new program but continues to decompress the current program using the previously decoded data obtained for the current program. The wireless device then decompresses the new program after it has been decoded. If layered encoding is used to transmit the current program and the new program (which is not required), the switching between the two programs can be smoother as described below.

For early decoding, the wireless device receives a user input and identifies a program with a possible selection by the user. The user input can be an arousal of the program listing, via the User navigation of the program list, keystrokes on the remote control unit, etc. The identified program may be a program that is displayed in reverse video by the user or a program that is expected to be selected based on user input. The wireless device initiates decoding of the identified program before it is selected such that if the program is subsequently selected, it can be decompressed and displayed in a shorter amount of time. The wireless device can also perform certain tasks (eg, continuously receiving additional information) when the user is expected to select a new program, such that the program can be decoded, decompressed, and displayed earlier.

For time-compensated transmissions, a base station transmits video and audio for a program in a manner that takes into account the difference between the audio processing delay and the video processing delay. If the video processing delay is longer than the audio processing delay by ΔD, the base station can transmit video by ΔD early. The wireless device can then receive, decode, decompress, and display the audio and video simultaneously with the appropriate time calibration of the video and audio with little or no buffering. This allows the wireless device to present audio earlier during program conversion due to its shorter processing delay, and thus provides a faster response to program conversion.

The techniques described herein can be applied independently or in combination. Various aspects and embodiments of the invention are described in further detail below.

100‧‧‧Wireless communication system

110‧‧‧Base station

112‧‧‧Source

120‧‧‧TX data processor

130‧‧‧Multiplexer/Modulator

132‧‧‧Transportation unit

134‧‧‧Antenna

140‧‧‧ Controller

142‧‧‧ memory

144‧‧‧ Scheduler

150‧‧‧Wireless devices

152‧‧‧Antenna

154‧‧‧ Receiver unit

160‧‧‧Demodulation Transducer/Multiplexer

170‧‧‧RX data processor

180‧‧‧post processor

182‧‧‧ display unit

184‧‧‧ audio unit

190‧‧‧ Controller

192‧‧‧ memory

200‧‧‧Superframe structure

201‧‧‧Superframe

220‧‧‧Wizard symbol

230‧‧‧Addition/Control Information Symbol

240‧‧‧ fields

242a-242d‧‧‧ Frames 1-4

410‧‧‧Video Encoder

420, 460‧‧‧TX basic stream processor

422, 462‧‧‧External encoder/interleaver

424, 464‧‧‧Internal encoder/interleaver

426, 466‧‧ ‧ symbol mapping

430, 470‧‧‧TX Enhanced Stream Processor

440, 480‧‧‧ combiner

450‧‧‧Audio encoder

520, 560‧‧‧RX elementary stream processor

522, 562‧‧‧ symbol mapping

524, 564‧‧‧Internal Decoder/Deinterleaver

526, 566‧‧‧External Decoder/Deinterleaver

530, 570‧‧‧RX Enhanced Stream Processor

540‧‧‧Video Decoder

542‧‧‧Video buffer

544‧‧‧Multiplexer

580‧‧‧Optical decoder

582‧‧‧Audio buffer

584‧‧‧Solution multiplexer

900‧‧‧ display screen

910, 920‧‧‧ areas

922‧‧‧ cursor

1000‧‧‧Form

1012‧‧‧Program Channel

1014‧‧‧Program name

1016‧‧‧Multiplex Logic Channel (MLC)

1018‧‧‧MLC parameters

1020‧‧‧MLC location

1210‧‧‧Video section

1212‧‧‧Audio section

1310‧‧‧Video section

1312‧‧‧Audio section

1 shows a block diagram of a base station and a wireless device; FIG. 2 shows an exemplary hyperframe structure; FIG. 3 illustrates the transmission of a data stream on a data channel; and FIG. 4 shows a transmission (TX) data at a base station. Figure 5 shows a receiving (RX) data processor at a wireless device; Figure 6 shows a timeline for switching reception from program A to program B; Figure 7 shows a method for switching from program A to program The timeline of B, in which both programs use layered coding; FIG. 8 shows a method for switching reception from program A to program B; FIG. 9 shows an exemplary display screen; Figure 10 shows an exemplary table for program listing maintenance; Figure 11 shows a method for switching reception between programs with early decoding; Figure 12 shows time-aligned transmission for video and audio; and Figure 13 shows video And time-compensated transmission of audio.

The word "exemplary" is used herein to mean "serving as an example, instance, or description." Any embodiment or design described herein as "exemplary" is not required to be construed as preferred or preferred over other embodiments or designs.

The techniques described herein for seamlessly switching reception between multimedia streams can be used in wireless and wireline communication systems, with time division multiplexing (TDM), frequency division multiplexing (FDM), and code division multiplexing ( CDM) systems, as well as single carrier and multi-carrier systems. Multiple carriers may be provided by orthogonal frequency division multiplexing (OFDM), some other multi-carrier modulation techniques, or some other construction. The techniques described herein are also applicable to broadcast, multicast, and unicast services. For clarity, the techniques are described below for an exemplary wireless communication system that uses a particular connection code mechanism, a particular frame structure, and a particular transmission mechanism.

1 shows a block diagram of a base station 110 and a wireless device 150 in a wireless communication system 100. Base station 110 is typically a fixed station and may also be referred to as a base transceiver system (BTS), an access point, a transmitter, or some other terminology. Wireless device 150 can be fixed or mobile and can also be referred to as a user terminal, a mobile station, a receiver, or some other terminology. The wireless device 150 can also be a portable unit such as a mobile phone, a palm-sized device, a wireless module, a digitization assistant (PDA), and the like.

At base station 110, a TX data processor 120 receives a plurality (T) of data streams (or "pass" data) from data source 112 and processes (eg, compresses, encodes, interleaves, and symbol maps) the data streams to generate data. symbol. As used herein, a "data symbol" is a modulation symbol used for communication data, and a "wizard symbol" is a modulation symbol used for a guide (which is a material known by a base station and a wireless device). And a modulation symbol is for the signal concentration Complex values, the signal set is used for a modulation mechanism (eg, M-PSK, M-QAM, etc.). A multiplexer (Mux)/modulator 130 receives and uses the wizard symbol to multiplex the data symbols for all data streams and produces a composite symbol stream. Modulator 130 performs modulation on the composite symbol stream and produces a stream of data samples. A transmission unit (TMTR) 132 converts the data sample stream into an analog signal and further conditions (e.g., amplifies, filters, and frequency upconverts) the analog signal to produce a modulated signal. Base station 110 then transmits the modulated signal from antenna 134 to the wireless device in the system.

At wireless device 150, the transmitted signal from base station 110 is received by antenna 152 and provided to a receiver unit (RCVR) 154. Receiver unit 154 conditions (eg, filters, amplifies, frequency downconverts, and digitizes) the received signals and provides an input sample stream. A demodulator/decompressor (Demod/Demux) 160 performs demodulation on the input samples to obtain one or more streams of interest (eg, for all streams of a selected multimedia program). Received symbol. Demodulation transformer 160 further performs detection (e.g., equalization or matched filtering) on the received symbols to obtain detected data symbols, which are estimates of data symbols transmitted by base station 110. An RX data processor 170 processes (e.g., symbol demaps, deinterleaves, decodes, and decompresses) the detected data symbols for each selected data stream and provides output data for the stream. The processing of the demodulation transformer 160 and the RX data processor 170 respectively complements the processing of the modulator 130 and the TX data processor 120 at the base station 110. A post processor 180 processes (e.g., converts to analog, filters, and amplifies) the output data for the selected data stream and produces an audio display unit 182 (e.g., an LCD screen), an audio unit 184 (for example). For example, an output signal on a speaker) and/or other output device.

Controllers 140 and 190 direct the operation of base station 110 and wireless device 150, respectively. The memory units 142 and 192 provide storage areas for the code and data used by the controllers 140 and 190, respectively. Controller 140 or a scheduler 144 can allocate resources for the data streams transmitted by base station 110.

The base station 110 can transmit the T data stream for multimedia (e.g., television) programming or multimedia content (such as video, audio, teletext, material, video/audio clips, etc.). A single multimedia program can be transmitted in a plurality of data streams, such as three separate streams for video, audio, and data. This allows a wireless device to independently receive the video, audio and data portions of the multimedia program. A single multimedia program can also have multiple streams of audio data, such as for different languages. For simplicity, the following description assumes that each data stream is transmitted on a separate data channel, also referred to as a multiplexed logical channel (MLC). In this case, there is a one-to-one relationship between the data stream and the MLC. Typically, each MLC/data channel can carry any number of streams. The base station 110 can transmit the data streams using various transport mechanisms, one of which is described below.

FIG. 2 shows an exemplary hyperframe structure 200 that can be used with system 100. The communication material can be transmitted in the hyperframe, wherein each of the hyperframes 210 has a predetermined duration (e.g., about 1 second). A hyperframe can also be referred to as a frame, a slot, or some other terminology. For the embodiment shown in FIG. 2, each hyperframe 210 includes a field 220 for the wizard, a field 230 for one or more additional/control information symbols (OIS), and a communication data. Field 240. Wireless devices can be synchronized using wizards (eg, frame detection, frequency error estimation, and time acquisition) and may be used for channel estimation. The additional information may indicate a plurality of parameters for the T data stream in the transmission (for example, the time-frequency position of each data stream in the hyperframe). The T data stream is sent in field 240. For the embodiment shown in FIG. 2, field 240 is further divided into four equally sized frames 242a through 242d for data transfer. In general, a hyperframe can be of any duration and can include any number of fields and frames. Wizards and additional information may also be sent in other ways than shown in FIG.

Figure 3 illustrates an exemplary transmission of a data stream on the MLC. The data stream is processed in a data block. M data blocks can be transmitted on the MLC in each super frame, where M ≧ 0 and each super frame can be different. Each data block contains a specific number of information bits and is separately encoded with an outer code to form a code block. Then, each code block is divided into four sub-blocks, and an internal code is used. Each sub-block is encoded and modulated (i.e., mapped into a modulated symbol) sub-blocks based on the "modulo" selected for the MLC. The modulo can indicate the internal code rate and modulation mechanism for the MLC. The four sub-blocks of the modulation symbols for each code block are transmitted in four frames of the super-frame, and each frame transmits a sub-block to achieve time diversity and stable reception performance. For each frame, M sub-blocks for M code blocks are transmitted in the frame portion that has been allocated to the MLC.

Depending on the nature of the data stream carried by the MLC and other possible factors, each MLC can be transmitted in a continuous or non-continuous manner. For each hyperframe, an "active" MLC is the MLC that is transmitted in the hyperframe. Each active MLC may carry one or more data blocks in the superframe. As shown in FIG. 3, to simplify the allocation and assignment of resources, the same resource assignment (eg, the same time-frequency location) is granted to each active MLC for four frames.

Referring again to Figure 2, the OIS for each hyperframe can carry "composite" additional information for all active MLCs sent in the hyperframe. The composite additional information conveys relevant parameters for each active MLC (eg, the time-frequency position of the MLC in the hyperframe). In addition, each MLC can carry "embedded" additional information about the transmission of this MLC in the next hyperframe. The embedded additional information allows the wireless device to resume MLC transmission in the next hyperframe without checking the OIS sent in the hyperframe. The wireless device may initially use the composite additional information in the OIS to determine the time-frequency location of each data stream of interest and may then use the embedded additional information to open only when the data stream is transmitted. The external code and mode for each MLC can be sent in the OIS or on a separate control channel. For the sake of clarity, the following description assumes that the OIS carrier for each hyperframe receives all the parameters required to transmit each MLC in the hyperframe.

4 shows a block diagram of one embodiment of a TX data processor 120 at a base station 110. For simplicity, Figure 4 shows the processing of video and audio for a multimedia program. Figure 4 also shows the use of "layered" coding whereby a data stream is transmitted in the form of two substreams, an elementary stream and an enhancement stream. This elementary stream can carry basic information for all wireless devices, and this enhanced stream can be carried for all wireless devices in better channel conditions. Additional information. Hierarchical coding is used to separately modulate the base and enhancement streams to produce two modulated symbol streams, which are then combined to obtain a data symbol stream.

In the TX data processor 120, a video encoder 410 receives and compresses the video data stream {i _x } for the video portion of the multimedia program, and provides an elementary stream {d _xb } and an enhancement for the video portion. Stream {d _xe }. The video encoder 410 can implement MPEG-2 (Motion Picture Experts Organization) and can generate an internal coding (I) frame, a forward predictive (P) frame, and a bidirectional predictive (B) frame for the video data stream. sequence. The elementary stream {d _xb } can carry I and P frames, and the enhanced stream {d _xe } can carry the B frame and possibly carry the P frame. In general, video encoder 410 can implement any video compression mechanism, and the elementary stream and enhancement stream can carry any frame type and combination.

A TX elementary stream processor 420 receives and processes the video elementary stream {d _xb }. In processor 420, an outer encoder/interleaver 422 encodes each data block in the video elementary stream and produces a code block. Each data block contains K data packets, and each data block can be externally encoded, using, for example, a (N, K) Reed-Solomon code to generate a N-encoded packet. Code block. For example, a data block having 12 data packets can be encoded using a 3/4 rate Reed Solomon code to produce a code block having 16 externally encoded packets. The outer encoder 422 also generates a cyclic redundancy check (CRC) value for error detection (i.e., determining if the packet is correctly decoded) and appends the CRC value to each outer code packet. Interleaver 422 splits each code block into four sub-blocks for four frames and further interleaves (i.e., reorders) the outer code blocks for each frame. An internal encoder/interleaver 424 encodes each outer code packet using, for example, a turbo code to generate an inner coded packet. Interleaver 424 interleaves the bits in each of the inner coded packets to produce an interleaved packet. A symbol mapping unit 426 maps the bits from the interleaver 424 to modulation symbols based on a modulation mechanism (eg, QPSK or 16-QAM) selected for the video stream, and provides a portion for the video elementary stream. A modulated symbol stream {s _xb }.

A TX enhanced stream processor 430 processes the video enhancement stream {d _xe } and provides a second modulated symbol stream {s _xe }. Processor 430 can use the same external code, internal code, and modulation mechanism as processor 420 for the elementary stream. A combiner 440 receives the first and second modulated symbol streams and scales the first and second modulated symbol streams using gains G _bs and G _es , respectively, and combines the scaled tones The variable symbol stream is generated to generate a data symbol stream {s _x } for one of the video portions. The gains G _bs and G _es determine the transmission power of the elementary stream and the enhancement stream (and thus the coverage). If layered encoding is not used, video encoder 410 provides a data stream {d _x }, and processor 420 encodes the data stream to produce data symbol stream {s _x }, and processor 430 and combiner 440 are not required.

An audio encoder 450 receives an audio data stream { i _y } and encodes the audio data stream { i _y } for the audio portion of the multimedia program, and provides an elementary stream {d _yb } and an enhancement stream for the audio portion. {d _ye }. The audio encoder 450 can implement any audio compression mechanism. The elementary stream {d _yb } can carry monophonic audio (eg, left plus right, or L+R), while the enhanced stream {d _ye } can carry stereo audio (eg, left minus right, or LR).

A TX elementary stream processor 460 receives and processes the audio elementary stream {d _yb } and provides a first modulated symbol stream {s _yb } for the audio elementary stream. In processor 460, the data blocks for the audio elementary stream are externally encoded and interleaved by an external encoder/interleaver 462, further encoded and interleaved by an internal encoder/interleaver 464, and mapped by a symbol. Unit 466 is mapped to a modulation symbol. A TX enhanced stream processor 470 processes the audio enhancement stream {d _ye } and provides a second modulated symbol stream {s _ye }. A combiner 480 receives, scales, and combines the modulated symbol streams {s _yb } and {s _ye } and generates a data symbol stream {s _y } for the audio portion. If layered encoding is not used, audio encoder 450 provides a data stream { _dy }, and processor 460 encodes the data stream to produce data symbol stream { _sy } without processor 470 and combiner 480.

Video encoder 410 and audio encoder 450 perform higher layer processing (or "compression") for the data stream. Processors 420, 430, 460, and 470 and combiners 440 and 480 execute for data streams Entity layer processing (or "encoding"). Other data streams for other multimedia programs and/or other content may be compressed and encoded in a manner similar to that shown in FIG.

FIG. 5 shows a block diagram of one embodiment of an RX data processor 170 at the wireless device 150. For simplicity, Figure 5 shows the processing of video and audio for a multimedia program. In the RX data processor 170, an RX elementary stream processor 520 and an RX enhancement stream processor 530 receive a detected data symbol stream from the demodulation transformer 160. , which is an estimate of the data symbol stream {s _x } for the video portion. In processor 520, a symbol demapper 522 demaps the detected data symbols and provides detected bits, which may be represented by a log-to-value ratio (LLR). Unit 522 can be a demodulation transformer 160 rather than part of RX data processor 170. An internal deinterleaver/decoder 524 deinterleaves and decodes the detected bits of each packet based on the inner code and provides an internally decoded packet. The decoder 524 also checks each internally decoded packet using the CRC value appended to the packet. An external deinterleaver/decoder 526 deinterleaves the internally decoded packets for each frame. If any packet of a given code block is erroneously decoded, decoder 526 performs decoding on the N internally decoded packets for the code block based on, for example, a (N, K) Reed Solomon code, and is the code The block provides K externally decoded packets. If there is no error internally decoded packet in the code block, external decoding can be skipped. Processor 520 provides a decoded video elementary stream .

Processor 530 processes the detected data symbol stream And provide a decoded video enhancement stream . A video decoder 540 receives the decoded elementary stream and the enhancement stream to perform video decompression in a complementary manner to the video compression performed by the base station, and provides a decompressed video stream. . A multiplexer 544 receives the decompressed video stream from a video buffer 542 And a secondary video stream {u _x } and will stream Or {u _x } is provided as an output stream {v _x }. The video buffer 542 can store pre-recorded video clips, trademarks, advertisements, text messages, and the like. For example, content from video buffer 542 can be displayed between program transitions to indicate to the user that acquisition of a new program is in progress.

An RX elementary stream processor 560 and an RX enhanced stream processor 570 receive a detected data symbol stream , which is an estimate of the data symbol stream {s _y } for the video portion. In processor 560, a symbol demapping unit 562 demapping the detected data symbols and providing the detected bits. Unit 562 can be a demodulation transformer 160 rather than a portion of RX data processor 170. An internal deinterleaver/decoder 564 deinterleaves and decodes the detected bits of each packet and provides an internally decoded packet. The decoder 564 also uses the CRC value appended to the packet to check each internally decoded packet. An external deinterleaver/decoder 566 deinterleaves the internally decoded packets for each frame. For each code block having at least one packet error, decoder 566 performs external decoding on the internally decoded packet for the code block and provides an externally decoded packet. Processor 560 provides a decoded video elementary stream .

Processor 570 processes the detected data symbol stream And provide a decoded audio enhancement stream . An audio decoder 580 receives the decoded elementary stream and enhancement stream and decompresses it in a manner complementary to the audio compression performed at the base station, and provides a decompressed audio stream. . A multiplexer 584 receives the decompressed audio data stream from an audio buffer 582 And an auxiliary audio stream {u _y } and will flow Or {u _y } is provided as an output stream {v _y }. The audio buffer 582 can store pre-recorded audio clips, advertisements, and the like.

Processors 520, 530, 560, and 570 perform physical layer receiver processing (or "decoding") for the data stream. Video decoder 540 and audio decoder 580 perform higher layer receiver processing (or "decompression") for the data stream. Other data streams for other multimedia programs and/or other content may be decoded and decompressed in a manner similar to that shown in FIG.

Continuous decoding

6 shows a timeline for seamlessly switching from a current multimedia program A to a new multimedia program B. Initially, in the hyperframe n, the wireless device decodes, decompresses, and displays program A. At time T ₁ , the user selects a new program B. At this point, the wireless device does not have the additional information needed to decode program B. The wireless device does not stop or clear, instead, it continues to decode, decompress, and (as appropriate) display program A in hyperframe n.

At the start time T _{2 of the} next hyperframe n+1, the wireless device receives the OIS of the hyperframe and acquires additional information for program B. The wireless device can use this additional information to begin decoding program B in hyperframe n+1. The wireless device continues to decompress program A in hyperframe n+1 using the decoded data for program A obtained in the previous hyperframe n.

At time T _3, the wireless device for decoding a complete super frame information of the n + 1 B of the program. As shown in FIG. 6, if program B uses a 3/4 rate Reed Solomon code and the parity packet for each code block is transmitted in frame 4, then if no packet is internally decoded by error, the wireless device can All code blocks for program B are recovered in frame 3. Upon completion of the program B (e.g., shown in Figure 6 at time T ₃₎ of the decoding, the wireless device may be early in the super frame information to decompress the program start n + 1 B. Once sufficient decoded data (e.g., an I-frame) for program B is obtained, the wireless device can also begin decompressing program B earlier. Therefore, the wireless device can begin decompressing program B as early as during the frame n+1. Alternatively, the wireless device can begin decompressing program B (not shown in Figure 6) at the beginning of the next hyperframe n+2.

The time between T ₁ and T ₃ can be regarded as the acquisition time of the new program B. The acquisition time is variable and depends on the time at which the user chooses to be received, in relation to the decompression start time of the next OIS and program B. If the OIS is sent infrequently (eg, every 1 second) and/or if the decoding delay is long, the acquisition time can be relatively long. Continuous decoding, decompression, and (as appropriate) display of program A during acquisition time may provide a better user experience than stopping or clearing the display throughout the acquisition time.

Figure 7 shows a timeline for seamlessly switching from a current multimedia program A to a new multimedia program B, where both programs use layered coding. Initially, in the hyperframe n, the wireless device decodes, decompresses, and displays the elementary stream and enhancement stream (BS and ES) for program A. At time T ₁ , the user selects a new program B. Since the wireless device does not have additional information to decode program B at this time, the wireless device continues to decode, decompress, and (as appropriate) display program A in hyperframe n.

At time T ₂ , the wireless device receives the OIS for the next hyperframe n+1 and acquires additional information for program B. In hyperframe n+1, the wireless device continues to decode the elementary stream for program A (eg, using processors 520 and 560 in FIG. 5) and begins decoding the elementary stream for program B (eg, using a map) Processors 530 and 570 in 5, which are typically used to enhance the stream but can also be configured to process the elementary stream). The wireless device also uses the decoded data for program A acquired in the previous hyperframe n to continue decompressing the elementary stream (or elementary stream and enhancement stream) for program A in hyperframe n+1. .

At time T _3, the wireless device completes the decoding for the base stream of Program B. The wireless device may be as early as + 1's super-frame n (e.g. as shown, at time T ₃ 7) or the next super frame + 2 starting point information decompression program n B. In hyperframe n+2, the wireless device terminates the decoding of program A and performs decoding of the elementary stream and enhancement stream for program B. The wireless device also decompresses the elementary stream using decoded data obtained for the elementary stream of program B in the previous hyperframe n+1. At time T ₅ , the decoded material for the program B enhancement stream is available for use. The wireless device may be earlier (e.g., as shown in Figure 7 at time T _5), or inquiry next super frame n + 3 for decompressing the start point B of the program elementary stream and enhancement stream.

As shown in FIG. 7, the conversion from the current program A to the new program B can be "smoother" if both programs are transmitted using layered coding. The wireless device can switch from program A to program B in stages. The wireless device receives the elementary stream and the enhancement stream for program A in the first phase, then receives the elementary stream for program A in the second phase, and then receives the elementary stream for program B in the third phase, and finally in the The four stages receive the elementary stream and the enhancement stream for program B. For example, one or more stages may be skipped if layered encoding is not used to transmit program A or B, or if switching is performed in a few super-frames (as shown in Figure 7).

8 shows a flow diagram of a method 800 for switching reception from a current multimedia program A to a new multimedia program B. The wireless device receives, decodes, decompresses, and displays the current program A (block 810). The wireless device receives a user selection of a new pair of programs B (block 812). As determined in block 816, the wireless device continues to decode, decompress, and (as appropriate) display the current program A (block 814) until additional information for the new program B is available. currently, The wireless device decodes the new program B but continues to decompress and (as appropriate) display the current program A (block 818). As determined by block 820, once program B has been decoded, the wireless device decodes, decompresses, and displays the new program B (block 822).

2. Early decoding

The above description of "continuous decoding" assumes that the wireless device does not have information for program conversion before the user selection of the new program. If this is the case, the wireless device begins decoding the new program after receiving the user selection. However, in many cases, the wireless device has information about the user's previous behavior and can use this information to predict or predict the user's future choices. The wireless device can perform its "early" decoding before a program is selected by the user to achieve a faster transition between programs. This early decoding can be performed in a variety of ways, as described below.

FIG. 9 shows an exemplary display screen 900 produced by a wireless device. For this embodiment, display 900 includes two regions 910 and 920. Area 910 shows the video of the currently selected multimedia program. Area 920 displays a program listing (PG) that lists the programs displayed on each program channel. In general, display 900 can include any number of regions for displaying any type of content.

The user can recall the program at any time by clicking on a suitable button on the wireless device or remote control unit (eg, "Program Menu" button). If the user clicks on any of the specified group of buttons (eg, an "up to page" or "down to page" button), the wireless device can also automatically recall the program listing. In any event, the wireless device can monitor the user's tour of the program listing to predict the next program selection.

For the embodiment shown in Figure 9, the program listing displays a list of program channels and programs currently displayed on such channels. A cursor 922 indicates the program currently displayed in reverse video. The cursor 922 moves up and down the program list in response to the user's keystroke action. If the user moves the cursor out of the top or bottom of the area 920, another portion of the program listing is received and displayed in area 920.

FIG. 10 shows an illustrative table 1000 maintained by a wireless device for a program listing. Form 1000 can be stored in the cache memory within the wireless device for quick access. The table 1000 includes a storage program channel 1012, a stored program name 1014, a MLC queue 1016 for storing programs, a column 1018 for storing relevant parameters for each MLC, and a storage for the current super. Column 1020 of the time-frequency position of each MLC of the frame. The base station transmits information that can be changed infrequently for columns 1012 through 1018, and the wireless device updates this information as needed. The time-frequency position for each MLC can be changed in each superframe. If the wireless device continues to receive the currently selected multimedia program, as described above, the time-frequency location of each MLC for the program can be obtained from the embedded additional information sent on the MLC. The wireless device does not need to wake up and receive OIS. In this case, the information in column 1020 is stale for all MLCs except for the currently selected program.

If the wireless device detects that the user is likely to change the program (eg, based on a button/button action), the wireless device can begin receiving OIS in each of the hyperframes. The wireless device may store additional information for: (1) MLC for the program displayed in the area 920 for the program listing; (2) all MLCs sent in the current hyperframe; or (3) some other MLC group. The wireless device can then begin decoding any of these MLCs in the current hyperframe without having to wait for the OIS in the next hyperframe.

A wireless device can recover a code block transmitted in a particular MLC without having to receive the entire code block. For example, if the code block uses a 3/4 rate Reed Solomon code and the code block is divided into four sub-code blocks, and is sent in four frames of a hyperframe (as shown in FIG. 3) The wireless device can recover the code block using only three of the sub-blocks. The wireless device can recover the code block by decoding the MLC starting at frame 1 or 2. Therefore, if an indication to decode the MLC is received during frame 1, the wireless device can begin decoding the MLC in frame 2 without having to wait for the next hyperframe.

Referring again to Figure 9, when the user navigates through the program listing, the cursor 922 indicates the program currently highlighted. The wireless device can be used when additional information for this program MLC is available. Start decoding the program displayed in reverse. As described above, if the resources are sufficient, the wireless device can simultaneously decode the currently selected program and the program displayed in reverse. In one embodiment, the wireless device begins decompressing the highlighted display program when the decoded material for the program is available. Optionally, the wireless device can display the program after the debounced program is decompressed. In another embodiment, the wireless device continues to decode, decompress, and display the currently selected program until the user chooses to highlight the program. For this embodiment, the wireless device uses decoded data for highlighting the program to quickly switch to the program when the user selects.

If the highlighted program does not use layered encoding, the wireless device can decode the highlighted program while decompressing the currently selected program, such as shown in FIG. The wireless device can decompress and display the program when the decoded material for the program for highlighting is available. If the currently selected program and the highlighted program use layered coding, the wireless device can switch between programs in stages, such as shown in FIG. The wireless device can decode the elementary stream for two programs and can decompress and display the elementary stream for the currently selected program. (1) Once the decoded material for the program is available and/or (2) if the user selects the program, the wireless device can decompress and display the elementary stream of the program for highlighting. If the user selects the highlighted program, the wireless device can decode, decompress, and display the enhanced stream for the program.

If the wireless device is decoding the current highlighted white display program Y and the user highlights another program Z, the wireless device terminates the processing of program Y and begins decoding program Z when additional information for program Z is available. The wireless device follows the user's tour of various programs and attempts to decode any program currently highlighted. This allows the wireless device to quickly switch to the latest highlighted display when the user subsequently selects it.

As described above, the wireless device can perform early decoding of the highlighted display without having to consider other information. The wireless device can also predict the next user selection based on other information such as, for example, page orientation, page speed, page curl mode, and the like.

For example, if the user attempts to reach a specific distance from the current program channel Program channel, which can be clicked on the "Up page" button. In this case, the wireless device can ignore the rapidly changing highlighted display until the "up to page" button is released. After the button is released, the wireless device can perform early decoding of the most recently highlighted program. Alternatively, the wireless device can decode a program prior to the program currently highlighted. This "future" program can be determined based on the page orientation and speed. Displaying an intermediate program during a fast page-up provides good feedback to the user.

As another example, the user may click on the "up to page" button at a slightly periodic rate to browse the program channel. In this case, the wireless device can decode, decompress, and display a program that gives a highlighted display of the time sufficient to perform such tasks. The wireless device can also decode one or more programs (if resources are available) of the currently highlighted program when predicting the user's tour in this direction. For example, if four programs A, B, C, and D are arranged in the order from A to D, when the wireless device receives the channel of program A, it can start to acquire programs B and C. The wireless device can abandon program B and begin acquiring programs C and D when the channel receiving program B is turned on. The wireless device can also begin to acquire multiple programs in multiple directions (eg, the opposite direction of the channel volume page).

The user can select the program by directly inputting the channel number of a new program via a numeric keypad. The wireless device can initiate early decoding based on the keys entered by the user. For example, the user can click "3", then "8", then click "Enter" to go to program channel 38. Upon receiving a "3" keystroke from the user, the wireless device may begin early decoding of program channel 3 (predicting the user selecting the channel) and/or saving additional information for program channels 30 through 39 (predicting the user) Choose one of these channels). Upon receipt of the "8" keystroke, the wireless device predicts that the user has selected this channel to begin early decoding of the program channel 38. Upon receiving an "input" keystroke, the wireless device can decompress and display this channel.

The wireless device can also store additional information and/or perform early decoding for frequently accessed programs. For example, a user can jump between two programs of interest frequently or continuously (eg, by pressing a "jump" button). When this is detected, the wireless device can predict Decode two programs on the next jump. Users can also scroll through pages between a small range of program channels. When this is detected, the wireless device can decode the next program when the next channel transition in the predicted page is predicted.

Typically, the wireless device can use any relevant information for early decoding of the program. Different key inputs (eg, "upward page", "jump", numeric number, etc.) can provide different information that can be used by the wireless device to predict the next user selection. The wireless device can perform any early decoding of programs that are predicted to be selected by the user (e.g., programs that are currently highlighted, programs that are in the direction of the page, etc.).

11 shows a flow diagram of a method 1100 for switching reception between multimedia programs with early decoding. The wireless device detects a user's tour of the program based on, for example, a button/button action (block 1112). As determined by block 1114, if a user tour is detected, the wireless device begins processing the OIS in each of the hyperframes and saves additional information for the MLC of interest (block 1116). For example, the wireless device may save additional information for all MLCs, or just MLCs for programs displayed on the program guide screen, or some other MLC group.

After detecting the user's tour, the wireless device then monitors the user input (block 1118). As determined by block 1120, if a user input is received, the wireless device determines if the user input is a channel selection button (block 1122). The channel selection button is a button that instructs the user to select a new program channel, which may include an "input", "previous channel", "next channel", and "jump" button. If the channel selection button is not received, the wireless device identifies a possible program with the user selected based on the user input currently received (block 1124). As noted above, the program can predict the program to be selected for the currently highlighted program or a digital and/or non-numeric button input. The wireless device begins early decoding of the identified program (block 1126). The wireless device can also decompress and (as appropriate) display the program prior to user selection (block 1128). Alternatively, the wireless device can wait for the user to select the program (not shown in Figure 11) before decompressing and displaying the program. The method then returns to block 1118.

Referring again to block 1122, if a channel selection button is received, the wireless device switches to the newly selected program, which may be a program identified based on prior user input. The wireless device then decodes, decompresses, and displays the selected program (block 1130). This method can then return to block 1118 (shown in Figure 11) or block 1112.

The wireless device can execute block 1112 through block 1116 in response to the first user input after a button/button quiescent state. The first user input will also trigger blocks 1118 and 1120 and will be processed appropriately.

For clarity purposes, program selection via a program listing has been described above. Programs can also be selected in other ways, such as using other screen direct selection methods. For example, the display can display one or more icons, and each icon can represent a particular program. In any event, the wireless device can begin acquiring (e.g., decoding) the program when the program is highlighted, and can switch to the program when the user selects. Since the acquisition process begins before the user selects, the user feels faster to get the speed.

Continuous decoding and early decoding techniques can be used for one or more data streams associated with multimedia programming. For example, continuous decoding or early decoding may be used only for the audio portion/component of current and new multimedia programs, or for only the video portion, or the audio and video portions. Thus, blocks 810, 814, 818 and 822 of FIG. 8 and blocks 1126, 1128 and 1130 of FIG. 11 can be performed on the audio portion, the video portion or the audio and video portions of the current and new multimedia programs.

The resources at the wireless device can be configured to receive different parts/components for different multimedia programs. For example, the RX data processor 170 can simultaneously decode and decompress the audio portion of one program and the video portion of another program. This allows the user to simultaneously watch and listen to two different programs. Continuous decoding and early decoding allow the user to switch the audio and/or video portions of the two programs more seamlessly. For example, a user can watch a baseball game and listen to music at the same time. If the game becomes interesting, the user can switch from music to the audio portion of the game more seamlessly. Users can also watch one game at the same time and listen to another game, and no When an exciting event occurs, it can switch video and/or audio to a more interesting game.

3. Time-compensated video and audio transmission

The video and audio decoders at the wireless device each require a certain amount of time to perform video and audio decompression. The base station can transmit video and audio in a way that improves the acquisition of new programs.

Figure 12 shows the transmission of video and audio over time calibrated at the base station. 1210 specifies a video portion and an audio portion 1212 while playing, and at time T ₁₁ by the base station over the transmission time-aligned manner. Wireless device receives the video and audio portions, each portion and the decoding portion of such complete decoding at a time T _12. For simplicity, Figure 12 shows the same transmission and decoding delay D _dec for the video and audio portions. The wireless device then separately decompresses the decoded video and audio portions using video and audio decoders. FIG. 12 shows a video decompression delay D _video and audio decompression delay D _audio, which is generally greater than D _audio D _video, and if (for example) to obtain improved compression characteristics without the information blocks transmitted sequentially, which is much larger than the D _audio . The wireless device then early completed at time T ₁₃ Solutions of audio compression. Wireless devices typically buffer the decoded audio (rather than decompressed audio with more bits) by the difference in decompression delay (ie, ΔD = D _{video -} D _audio ). This allows the video buffer is completed at time T decompressed video and audio playback portion ₁₄ simultaneously.

Figure 13 shows the transmission of video and audio with time compensation to account for differences in video and audio decompression delays. A video portion 1310 and an audio portion 1312 are designated for simultaneous playback, but are transmitted by the base station at different times T ₂₁ and T _{22, respectively} . Wireless devices receiving such video and audio portions, each of the decoding section, the video decoding is completed at time T _23, T ₂₄ and the time of the audio decoding is completed. Wireless devices are decompressed decoded video and audio portion of, and solutions to complete two portions at about the time of compression T _25. The video decompression delay is D _video and the audio decompression delay is D _audio , which is the same as shown in FIG. However, the video portion 1310 has transmitted the delay difference ΔD earlier than the audio portion 1312, or ΔD = T _{23 -} T ₂₁ .

Using the delay compensated transmission shown in Figure 13, the wireless device can play the audio when the audio is decompressed without buffering the audio and waiting for the video decompression to complete. It is preferred to play the audio as early as possible (and earlier than the video due to the shorter decompression delay) to provide a faster response to program conversion. The response time of the time compensated transmission in Figure 13 is a difference ΔD from the response time of the time calibrated transmission in Figure 12. Since audio is used for information related to many programs such as news, weather, etc., users can enjoy audio even when there is no video.

Various techniques for seamless handover reception (eg, continuous decoding, early decoding, phased switching using elementary streams and enhanced streams, and time compensated video and audio transmission) can be applied separately. These techniques can also be applied in a variety of different combinations. For example, as described above, early decoding can be performed in combination with a staged switch.

The seamless handover reception techniques described herein can be constructed from a variety of components. For example, such techniques can be constructed in hardware, software, or a combination thereof. For a hardware embodiment, a processing unit for supporting or performing seamless handover reception may be constructed in one or more special application integrated circuits (ASICs), digital signal processors (DSPs), and digital signal processing devices. (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, other electronic unit designed to perform the functions described herein Or a combination thereof.

For a software embodiment, the techniques described herein can be implemented using modules (eg, procedures, functions, and the like) that perform the functions described herein. The software code can be stored in a memory unit (e.g., memory unit 142 or 192 in FIG. 1) and executed by a processor (e.g., controller 140 or 190). The memory unit can be constructed within the processor or external to the processor, as is known in the art, and can be communicatively coupled to the processor via various components, as external to the processor.

This article includes a title for reference and help finding a particular paragraph. These headings are not intended to limit the scope of the concepts described below, and such concepts may be used in other paragraphs throughout the specification. applicability.

The above description of the disclosed embodiments is intended to enable any person skilled in the art to make or use the invention. Various modifications of the embodiments are apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded to the broadest scope of the principles and novel features disclosed herein.

Claims (148)

A method for switching reception between multimedia programs in a wireless communication system, the method comprising: decoding at least a portion of a first program obtained from a first data frame; receiving a user selection of a second program, The second program is different from the first program; obtaining, from the first data frame, overhead information associated with decoding the second program from a second data frame, wherein the additional information is included in the second At least a time-frequency location of the second program in the data frame; continuing to obtain at least a portion of the first program at least until the additional information of the second program is received after receiving the user selection of the second program Decoding; after obtaining the additional information of the second program, decoding at least a portion of the second program; and after decoding at least a portion of the second program, switching reception between the first program and the second program . The method of claim 1, wherein the at least one portion of the first program comprises an audio portion. The method of claim 1, wherein the at least a portion of the first program comprises a video portion. The method of claim 1, further comprising: decompressing the at least one portion of the first program until the additional information of the second program is obtained. The method of claim 4, wherein the decompressing the at least one portion of the first program comprises video decoding a video portion of the first program. The method of claim 4, wherein the at least a portion of the first program is decompressed The audio-containing portion decodes one of the audio portions of the first program. The method of claim 1, further comprising: decompressing the at least a portion of the first program until decoding the at least a portion of the second program. The method of claim 7, further comprising: decompressing the at least a portion of the second program after decoding the at least a portion of the second program. The method of claim 7, further comprising: displaying the at least a portion of the first program while obtaining the additional information of the second program and until decoding the at least one portion of the second program. The method of claim 1, further comprising: providing an indication to decode the second program after receiving the user selection of the second program. The method of claim 1, wherein the decoding of the at least one portion of the first program and the decoding of the at least a portion of the second program are for physical layer decoding. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a controller operable to: direct decoding of at least a portion of a first program obtained from a first data frame, And receiving, by the user of receiving a second program, the second program is different from the first program; and a data processor operable to: decode from the first data frame when directed by the processor The at least one portion of the first program obtains, from the first data frame, additional information associated with decoding the second program from the second data frame, wherein the additional information is included in the second data frame At least a time-frequency location of the second program, receiving the second program After the user selects, at least until the additional information of the second program is obtained, the at least part of the first program is continued to be decoded; after the additional information of the second program is obtained, at least a part of the second program is decoded; And after decoding at least a portion of the second program, switching reception between the first program and the second program. The apparatus of claim 12, further comprising: at least one decoder operative to decompress the at least a portion of the first program until the additional information of the second program is obtained. The apparatus of claim 13, wherein the at least a portion of the decompressing the first program comprises video decoding a video portion of the first program. The apparatus of claim 13, wherein the decompressing the at least one portion of the first program comprises audio decoding one of the first program audio portions. The device of claim 12, further comprising: a display unit operable to display the additional information of the second program at the same time and until decoding the at least one portion of the second program, displaying the at least the first program portion. The device of claim 12, further comprising: a receiver unit operative to obtain the first program and the second program via a single radio frequency (RF) channel. The apparatus of claim 12, wherein the at least one decoder is further operative to decompress the at least a portion of the first program until the at least a portion of the second program is decoded. The apparatus of claim 18, wherein the at least one decoder is further operative to decompress the at least a portion of the second program until the at least a portion of the second program is decoded. The device of claim 12, wherein the data processor is further operative to provide an indication to decode the second program after receiving the user selection of the second program. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: means for decoding at least a portion of a first program obtained from a first data frame; for receiving a second program a user-selected component, the second program being different from the first program; and means for obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, The additional information includes at least a time-frequency location of the second program in the second data frame; and the additional information is obtained at least until the second program is obtained after receiving the user selection of the second program And the means for decoding the at least a portion of the first program; means for decoding at least a portion of the second program after obtaining the additional information of the second program; and for decoding the second program After at least a portion, the received component is switched between the first program and the second program. The apparatus of claim 21, further comprising: means for decompressing the at least one portion of the first program until the additional information of the second program is obtained. The device of claim 22, wherein the means for decompressing the at least a portion of the first program comprises video decoding a video portion of the first program. The apparatus of claim 22, wherein the means for decompressing the at least a portion of the first program comprises audio decoding an audio portion of the first program. The device of claim 21, further comprising: And means for displaying the at least a portion of the first program at the same time as obtaining the additional information of the second program and until decoding the at least one portion of the second program. The apparatus of claim 21, further comprising: means for decompressing the at least one portion of the first program until decoding the at least a portion of the second program. The apparatus of claim 26, further comprising: means for decompressing the at least a portion of the second program after decoding the at least a portion of the second program. The apparatus of claim 21, further comprising: means for providing an indication of decoding the second program after receiving the user selection of the second program. The apparatus of claim 21, further comprising: means for obtaining the first program and the second program via a single radio frequency (RF) channel. A method for receiving a multimedia program in a wireless communication system, the method comprising: decoding a first elementary stream and a first enhancement stream for a first program from a first data frame in a first time interval The first elementary stream carries basic information for the first program and the first enhancement stream carries additional information for the first program; the first data frame is obtained and decoded from a second data frame. An additional information associated with the second program, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; decoding from the first data frame for the first program The first elementary stream and the second elementary stream for the second program are simultaneously decoded from the second data frame in a second time interval after the first time interval; and at the second time interval The second elementary stream and the second enhancement stream for the second program are then decoded from the second data frame in a third time interval. The method of claim 30, further comprising: receiving an indication of initially decoding the second program, and wherein in response to receiving the indication, initiating decoding of the first elementary stream and the second elementary stream. The method of claim 30, further comprising: receiving an indication of switching from the first program to the second program, and wherein in response to receiving the indication, initiating decoding of the second elementary stream and the second enhancement stream . The method of claim 32, further comprising: receiving a user input selecting the second program, and wherein the indication of switching to the second program is in response to the selected second program. The method of claim 30, further comprising: decompressing the first elementary stream and the first enhancement stream decoded in the first time interval; and decompressing the first element decoded in the second time interval flow. The method of claim 34, further comprising: after the first time interval, terminating the decompressing the first elementary stream; and decompressing the second elementary stream decoded in the second time interval. The method of claim 35, further comprising: decompressing the second elementary stream and the second enhancement stream decoded in the third time interval. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a user interface for receiving user selection of a multimedia program; a communication component configured to Receiving a plurality of streams containing the multimedia program selected by the user, wherein the stream is carried in a plurality of data frames; and a processor coupled to the user interface and to the communication component, the processor Configuring to: decode, by the communication component, the first set of data frames for decoding a first elementary stream and a first enhancement stream for a first program, the first elementary stream being carried for the first Basic information of the program and the first enhancement stream carries additional information for the first program; receiving, from the user interface, a user selection for a second program different from the first program Obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, wherein the additional information includes at least a time of the second program in the second data frame - a frequency position; continuing to decode the first elementary stream of the first program and simultaneously starting decoding a second elementary stream of one of the second programs obtained from the second data frame; and decoding at least the second program After a portion, the reception is switched between the first program and the second program. A method for switching reception between multimedia programs in a wireless communication system, the method comprising: decoding and decompressing at least a portion of a first program obtained from a first data frame; receiving a user input; User input to identify a second program having a possibility selected by the user, the second program being different from the first program; and obtaining and decoding from the first data frame from the first data frame The additional information associated with the second program, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; and the second data is initiated before the user selects the second program Decoding of at least a portion of the second program of the frame while continuing to decompress the first program At least a portion; and after the user selects the second program, switching reception between the first program and the second program. The method of claim 38, wherein the receiving the user input comprises receiving the user input to highlight the second program. The method of claim 38, further comprising: identifying a third program having a likelihood selected by the user based on the user input; and initiating at least the third program before the user selects the third program Part of the decoding. The method of claim 40, wherein the second program and the third program are in different directions of a channel page. The method of claim 38, further comprising: decompressing the at least a portion of the second program after completing the decoding of the at least a portion of the second program. The method of claim 38, further comprising: receiving a user selection of the second program; and after completing the decoding of the at least one portion of the second program and responding to receiving the user of the second program Selecting to decompress at least a portion of the second program. The method of claim 38, further comprising: detecting a user's tour based on the user input to select a new program; and predicting a user selection of one of the at least one program for obtaining the at least one program Additional information for decoding the at least one program. The method of claim 44, wherein the at least one program comprises a program for a program listing suitable for display on a display screen. The method of claim 38, wherein the receiving the user input comprises receiving a keystroke for scrolling the available programs. The method of claim 38, wherein the receiving the user input comprises receiving a digital input for a user selected program. The method of claim 38, wherein the initiating the decoding of the at least a portion of the second program comprises initiating decoding of an audio portion of the second program prior to the user selecting the second program. The method of claim 38, wherein the initiating the decoding of the at least a portion of the second program comprises initiating decoding of a video portion of the second program prior to the user selecting the first program. A computer readable storage medium containing a set of instructions for causing a processor to perform a method of switching reception between multimedia programs in a wireless communication system, the medium comprising: decoding and decompressing from a first a data frame obtaining an instruction of at least a portion of the first program; receiving a user-selected instruction of the second program, the second program being different from the first program; obtaining and receiving from the first data frame An instruction to decode the additional information associated with the second program, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; receiving the second program After the user selects, at least until the additional information of the second program is obtained, the at least part of the decoding instruction of the first program is continued; after the additional information of the second program is obtained, the second program is decoded At least a portion of the instructions; and after decoding at least a portion of the second program, at the first program and the second The instructions for receiving are switched between programs. The medium of claim 50, further comprising instructions to decompress the at least a portion of the first program until the at least a portion of the second program is decoded. The media of claim 51, further comprising: displaying the at least a portion of the first program at the same time as the additional information of the second program is obtained and until at least a portion of the second program is decoded. The medium of claim 50, further comprising instructions for decompressing the at least a portion of the second program after decoding the second program. The medium of claim 50, further comprising: an instruction to decompress the at least a portion of the first program until the additional information of the second program is obtained. The media of claim 54, wherein the decompressing the at least one portion of the first program comprises video decoding a video portion of the first program. The medium of claim 54, wherein the decompressing the at least one portion of the first program comprises audio decoding an audio portion of the first program. The medium of claim 50, further comprising: an instruction to decode an indication of the second program after receiving the user selection of the second program. An apparatus for switching reception between multimedia programs in a wireless communication system, the apparatus comprising: means for decoding and decompressing at least a portion of a first program obtained from a first data frame; for receiving a a component input by the user; for identifying, based on the user input, a component having a second program selected by the user, the second program being different from the first program; for using the first information The box gets and decodes the second section from a second data frame And an additional component of the associated information, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; and is used to start from the user before selecting the second program Decoding of at least a portion of the second program of the second data frame while continuing to decompress the at least a portion of the first program; and for using the second program after the user selects the second program The receiving component is switched between the second programs. The device of claim 58, wherein the means for receiving the user input comprises means for receiving the user input to highlight the program. The apparatus of claim 58, further comprising: decompressing the at least a portion of the second program after the decoding of the at least a portion of the second program is completed. A method for switching reception between multimedia programs in a wireless communication system, the method comprising: decoding, by a first decoder, a first elementary stream of one of the first programs obtained from a first data frame, the An elementary stream carries basic information for the first program; a second decoder is used to decode a first enhancement stream of the first program obtained from the first data frame, the first enhancement stream being carried for the Additional information of the first program; receiving, by the user of the second program, the second program is different from the first program; obtaining additional information associated with decoding the second program from the first data frame; using The first decoder continues to decode the first elementary stream of the first program and simultaneously begins decoding the second elementary stream of the second program obtained from a second data frame using the second decoder; After decoding at least a portion of the second program, the reception is switched between the first program and the second program. The method of claim 61, wherein the additional information includes at least a time-frequency location of the second elementary stream of the second program in the second data frame. The method of claim 61, further comprising: displaying the at least a portion of the first program until the at least a portion of the second program is decoded. The method of claim 61, wherein after the switching between the first program and the second program, the method further comprises: decoding the second elementary stream of the second program using the first decoder; and using the The second decoder decodes one of the second enhancement streams of the second program. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a communication component including a first decoder and a second decoder; and a processor coupled to the communication a component, the processor configured to: direct the first decoder to decode a first elementary stream of one of the first programs obtained from a first data frame, the first elementary stream being carried for the first program Basic information; and directing the second decoder to decode a first enhancement stream of the first program obtained from the first data frame, the first enhancement stream carrying additional information for the first program; directing the communication The component obtains, from the first data frame, additional information for decoding a second program; directing the first decoder to continue decoding the first elementary stream of the first program and directing the second decoder to start decoding simultaneously a second elementary stream of the second program obtained from a second data frame; and after decoding at least a portion of the second program, switching reception between the first program and the second program. The device of claim 65, wherein the additional information is included in the second data frame At least a time-frequency location of the second elementary stream of the second program. The device of claim 65, further comprising: a display for displaying the at least one portion of the first program until decoding the at least a portion of the second program. The device of claim 65, wherein after the switching between the first program and the second program, the processor is further configured to: direct the first decoder to decode the second elementary stream of the second program And directing the second decoder to decode one of the second enhancement streams of the second program. A method for switching reception between multimedia programs in a wireless communication system, the method comprising: decoding at least a portion of a first program obtained from a first data frame; receiving a user selection of a second program, The second program is different from the first program; obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, wherein the additional information is included in the second data frame At least a time-frequency position of the second program; after the user selection of the second program is received, at least until the additional information of the second program is obtained, the decoding of the at least one portion of the first program is continued; And after obtaining the additional information of the second program, decoding at least a portion of the second program. The method of claim 69, wherein the at least a portion of the first program comprises an audio portion. The method of claim 69, wherein the at least a portion of the first program comprises a video portion. The method of claim 69, further comprising: decompressing the at least one portion of the first program until obtaining the attachment of the second program Add information. The method of claim 72, wherein the decompressing the at least one portion of the first program comprises video decoding a video portion of the first program. The method of claim 72, wherein the decompressing the at least one portion of the first program comprises audio decoding an audio portion of the first program. The method of claim 69, further comprising: decompressing the at least a portion of the first program until decoding the at least a portion of the second program. The method of claim 75, further comprising: decompressing the at least a portion of the second program after decoding the at least a portion of the second program. The method of claim 75, further comprising: displaying the at least a portion of the first program while obtaining the additional information of the second program and until decoding the at least a portion of the second program. The method of claim 69, further comprising: providing an indication to decode the second program after receiving the user selection of the second program. The method of claim 69, wherein the decoding of the at least a portion of the first program and the decoding of the at least a portion of the second program are for physical layer decoding. The method of claim 69, further comprising: switching reception between the first program and the second program after decoding at least a portion of the second program. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a controller operable to: direct a solution of at least a portion of a first program obtained from a first data frame a code, and a user selection to receive a second program, the second program being different from the first program; and a data processor operable to: when directed by the processor, from the first data message The frame decodes the at least one portion of the first program, and obtains, from the first data frame, additional information associated with decoding the second program from the second data frame, wherein the additional information is included in the second data frame At least a time-frequency location of the second program, after receiving the user selection of the second program, at least until the additional information of the second program is obtained, continuing to decode the at least a portion of the first program; After obtaining the additional information of the second program, at least a portion of the second program is decoded. The apparatus of claim 81, wherein the at least one decoder is further operative to decompress the at least a portion of the first program until the at least a portion of the second program is decoded. The apparatus of claim 82, wherein the at least one decoder is further operative to decompress the at least a portion of the second program until the at least a portion of the second program is decoded. The device of claim 81, wherein the data processor is further operative to provide an indication to decode the second program after receiving the user selection of the second program. The apparatus of claim 81, further comprising: at least one decoder operative to decompress the at least a portion of the first program until the additional information of the second program is obtained. The apparatus of claim 85, wherein the at least one decoder is operative to decompress the at least a portion of the first program comprising video decoding a video portion of the first program. The apparatus of claim 85, wherein the at least one decoder is operative to decompress the at least a portion of the first program comprising audio decoding an audio portion of the first program. The device of claim 81, further comprising: a display unit operable to display the additional information of the second program at the same time and until decoding the at least one portion of the second program, displaying the at least the first program portion. The device of claim 81, further comprising: a receiver unit operative to obtain the first program and the second program via a single radio frequency (RF) channel. The apparatus of claim 81, further comprising: switching reception between the first program and the second program after decoding at least a portion of the second program. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: means for decoding at least a portion of a first program obtained from a first data frame; for receiving a second program a user-selected component, the second program being different from the first program; and means for obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, The additional information includes at least a time-frequency location of the second program in the second data frame; and the additional information is obtained at least until the second program is obtained after receiving the user selection of the second program And continuing to decode the at least a portion of the first program; and means for decoding at least a portion of the second program after obtaining the additional information of the second program. The apparatus of claim 91, further comprising: for decompressing the at least one portion of the first program until decoding the second program At least a portion of the components. The apparatus of claim 92, further comprising: means for decompressing the at least a portion of the second program after decoding the at least a portion of the second program. The apparatus of claim 91, further comprising: means for providing an indication of decoding the second program after receiving the user selection of the second program. The apparatus of claim 91, further comprising: means for obtaining the first program and the second program via a single radio frequency (RF) channel. The apparatus of claim 91, further comprising: means for decompressing the at least one portion of the first program until the additional information of the second program is obtained. The apparatus of claim 96, wherein the means for decompressing the at least a portion of the first program comprises video decoding a video portion of the first program. The apparatus of claim 96, wherein the means for decompressing the at least a portion of the first program comprises audio decoding an audio portion of the first program. The apparatus of claim 91, further comprising: means for displaying the at least a portion of the first program while obtaining the additional information of the second program and until decoding the at least one portion of the second program. The apparatus of claim 91, further comprising: means for switching reception between the first program and the second program after decoding at least a portion of the second program. A method for receiving a multimedia program in a wireless communication system, the method comprising: decoding a first elementary stream and a first enhancement stream for a first program from a first data frame in a first time interval The first elementary stream is used in the first section Basic information and the first enhancement stream carries additional information for the first program; obtaining additional information associated with decoding a second program from a second data frame from the first data frame, wherein The additional information includes at least a time-frequency location of the second program in the second data frame; and decoding the first elementary stream for the first program from the first data frame and at the first time After the interval, the second elementary stream for one of the second programs is simultaneously decoded from the second data frame in a second time interval. The method of claim 101, further comprising: decoding, after the second time interval, the second elementary stream and the second enhancement for the second program from the second data frame in a third time interval flow. The method of claim 101, further comprising: receiving an indication of initially decoding the second program, and wherein in response to receiving the indication, initiating decoding of the first elementary stream and the second elementary stream. The method of claim 101, further comprising: receiving an indication of switching from the first program to the second program, and wherein in response to receiving the indication, initiating decoding of the second elementary stream and the second enhanced stream . The method of claim 104, further comprising: receiving a user input selecting the second program, and wherein the indication of switching to the second program is in response to the selected second program. The method of claim 101, further comprising: decompressing the first elementary stream and the first enhancement stream decoded in the first time interval; and decompressing the first element decoded in the second time interval flow. The method of claim 106, further comprising: after the first time interval, terminating the decompressing the first elementary stream; and decompressing the second elementary stream decoded in the second time interval. The method of claim 107, further comprising: decompressing the second elementary stream and the second enhancement stream decoded in the third time interval. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a user interface for receiving user selection of a multimedia program; a communication component configured to: receive a plurality of streams of the multimedia program selected by the user, wherein the stream is carried in a plurality of data frames; and a processor coupled to the user interface and to the communication component, the processor configured And decoding, by the communication component, a first group of data frames for decoding a first elementary stream and a first enhancement stream for a first program, where the first elementary stream is used for the first program. Information and the first enhancement stream carries additional information for the first program; receiving, from the user interface, a user selection for a second program, the second program being different from the first program; The first data frame obtains additional information associated with decoding the second program from a second data frame, wherein the additional information includes at least a time-frequency bit of the second program in the second data frame And continuing to decode the first elementary stream of the first program and simultaneously start decoding a second elementary stream of one of the second programs obtained from the second data frame. The device of claim 109, wherein the communication component is further configured to: switch reception between the first program and the second program after decoding at least a portion of the second program. A method for switching reception between multimedia programs in a wireless communication system, The method includes: decoding and decompressing at least a portion of a first program obtained from a first data frame; receiving a user input; and identifying a second program having a possibility selected by the user based on the user input, The second program is different from the first program; and obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, wherein the additional information is included in the second data At least a time-frequency location of the second program within the frame; and, prior to the user selecting the second program, initiating decoding of at least a portion of the second program from the second data frame while continuing to decompress At least a portion of the first program. The method of claim 111, wherein the receiving the user input comprises receiving the user input indicating the second program. The method of claim 111, further comprising: identifying, based on the user input, a third program having a likelihood selected by the user; and initiating at least the third program before the user selects the third program Part of the decoding. The method of claim 113, wherein the second program and the third program are in different directions of a channel page. The method of claim 111, further comprising: decompressing the at least a portion of the second program after completing the decoding of the at least a portion of the second program. The method of claim 111, further comprising: receiving a user selection of the second program; and The at least a portion of the second program is decompressed upon completion of the decoding of the at least one portion of the second program and in response to receiving the user selection of the second program. The method of claim 111, further comprising: detecting a user's tour based on the user input to select a new program; and predicting a user selection of one of the at least one program for obtaining the at least one program Additional information for decoding the at least one program. The method of claim 117, wherein the at least one program comprises a program for a program listing suitable for display on a display screen. The method of claim 111, wherein the receiving the user input comprises receiving a keystroke for scrolling the available programs. The method of claim 111, wherein the receiving the user input comprises receiving a digital input for a user selected program. The method of claim 111, wherein the initiating the decoding of the at least a portion of the second program comprises initiating decoding of an audio portion of the second program prior to the user selecting the second program. The method of claim 111, wherein the initiating the decoding of the at least a portion of the second program comprises initiating decoding of a video portion of the second program prior to the user selecting the first program. The method of claim 111, further comprising: after the user selects the second program, switching reception between the first program and the second program. A computer readable storage medium containing a set of instructions for causing a processor to perform a method of switching reception between multimedia programs in a wireless communication system, the medium comprising: decoding and decompressing from a first A data frame obtains at least one of the first programs a command for receiving a user selected by the second program, the second program being different from the first program; obtaining from the first data frame and decoding the second program from a second data frame An additional information instruction, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; at least until the second is obtained after receiving the user selection of the second program The additional information of the program, the instruction to decode the at least a portion of the first program; and the instruction to decode at least a portion of the second program after obtaining the additional information of the second program. The media of claim 124, further comprising: an instruction to decompress the at least a portion of the first program until the additional information of the second program is obtained. The medium of claim 125, wherein the decompressing the at least one portion of the first program comprises video decoding a video portion of the first program. The medium of claim 125, wherein the decompressing the at least one portion of the first program comprises audio decoding an audio portion of the first program. The media of claim 124, further comprising instructions to decompress the at least a portion of the first program until the at least a portion of the second program is decoded. The media of claim 124, further comprising instructions to decompress the at least a portion of the second program after decoding the second program. The media of claim 124, further comprising, after decoding at least a portion of the second program, switching the received instruction between the first program and the second program. The media of claim 128, further comprising: obtaining the additional information of the second program at the same time and until decoding the second program The at least one portion displays an instruction of the at least a portion of the first program. The media of claim 124, further comprising: an instruction to decode an indication of the second program after receiving the user selection of the second program. An apparatus for switching reception between multimedia programs in a wireless communication system, the apparatus comprising: means for decoding and decompressing at least a portion of a first program obtained from a first data frame; for receiving a a component input by the user; for identifying, based on the user input, a component having a second program selected by the user, the second program being different from the first program; for using the first information The frame obtains means for decoding additional information associated with decoding the second program from a second data frame, wherein the additional information includes at least a time-frequency location of the second program in the second data frame; Decoding of at least a portion of the second program from the second data frame is initiated prior to the user selecting the second program, while continuing to decompress the at least a portion of the first program. The device of claim 133, wherein the means for receiving the user input comprises means for receiving the user input to highlight the program. The apparatus of claim 133, further comprising: decompressing the at least a portion of the second program after the decoding of the at least a portion of the second program is completed. The apparatus of claim 133, further comprising: means for switching reception between the first program and the second program after the user selects the second program. A method for switching reception between multimedia programs in a wireless communication system, The method includes: decoding, by a first decoder, a first elementary stream of one of the first programs obtained from a first data frame, the first elementary stream carrying basic information for the first program; using a second Decoding a first enhancement stream of the first program obtained from the first data frame, the first enhancement stream carrying additional information for the first program; receiving a user selection of a second program, the The second program is different from the first program; obtaining additional information associated with decoding the second program from the first data frame; and continuing to decode the first elementary stream of the first program using the first decoder And simultaneously starting to use the second decoder to decode a second elementary stream of the second program obtained from a second data frame. The method of claim 137, wherein the additional information includes at least a time-frequency location of the second elementary stream of the second program in the second data frame. The method of claim 137, further comprising: displaying the at least a portion of the first program until the at least a portion of the second program is decoded. The method of claim 137, further comprising: switching reception between the first program and the second program after decoding at least a portion of the second program. The method of claim 140, wherein after the receiving and switching between the first program and the second program, the method further comprises: decoding the second elementary stream of the second program using the first decoder; and using the The second decoder decodes one of the second enhancement streams of the second program. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a communication component comprising a first decoder and a second decoder; and a processor coupled to the communication component, the processor configured to: direct the first decoder to decode from a first Obtaining, by the data frame, a first elementary stream of one of the first programs, the first elementary stream carrying basic information for the first program; directing the second decoder to decode the first information obtained from the first data frame a first enhancement stream of a program, the first enhancement stream carrying additional information for the first program; directing the communication component to obtain additional information for decoding a second program from the first data frame; and Directing the first decoder to continue decoding the first elementary stream of the first program and directing the second decoder to simultaneously begin decoding a second elementary stream of the second program obtained from a second data frame. The device of claim 142, wherein the additional information includes at least a time-frequency location of the second elementary stream of the second program in the second data frame. The device of claim 142, further comprising: a display for displaying the at least a portion of the first program until the at least a portion of the second program is decoded. The device of claim 142, wherein the processor is further configured to switch reception between the first program and the second program after decoding at least a portion of the second program. The device of claim 145, wherein after the switching between the first program and the second program, the processor is further configured to: direct the first decoder to decode the second elementary stream of the second program And directing the second decoder to decode one of the second enhancement streams of the second program. A method for switching reception between multimedia programs in a wireless communication system, the method comprising: decoding at least a portion of a first program obtained from a first data frame; Receiving, by a user of a second program, the second program is different from the first program; obtaining, from the first data frame, additional information associated with decoding the second program from a second data frame, wherein The additional information includes at least a time-frequency location of the second program within the second data frame. A device for switching reception between multimedia programs in a wireless communication system, the device comprising: a communication component including a first decoder and a second decoder; and a processor coupled to the communication a component, the processor configured to: direct the first decoder to decode a first elementary stream of one of the first programs obtained from a first data frame, the first elementary stream being carried for the first program Basic information; and directing the second decoder to decode a first enhancement stream of the first program obtained from the first data frame, the first enhancement stream carrying additional information for the first program; directing the communication The component obtains additional information for decoding one of the second programs from the first data frame.