CN100583977C - Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service - Google Patents
Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service Download PDFInfo
- Publication number
- CN100583977C CN100583977C CN200680035856A CN200680035856A CN100583977C CN 100583977 C CN100583977 C CN 100583977C CN 200680035856 A CN200680035856 A CN 200680035856A CN 200680035856 A CN200680035856 A CN 200680035856A CN 100583977 C CN100583977 C CN 100583977C
- Authority
- CN
- China
- Prior art keywords
- stream
- enhancement layer
- transport stream
- layer
- carried out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Provided is a Digital Multimedia Broadcasting (DMB) transmitting/receiving apparatus. The DMB apparatus for a high-quality video service includes: a source encoder for source-encoding audio and video signals into base layer streams and enhancement layer streams, individually; a base layer transmission processor for receiving the base layer streams from the source encoder, performing system encoding, multiplexing encoded base layer streams into transport streams, and outputting base layer transport streams; an enhancement layer transmission processor for receiving the enhancement layer streams from the source encoder, performing system encoding, multiplexing the encoded enhancement layer streams into enhancement layer transport streams, and outputting enhancement layer transport streams; and a layered digital broadcasting transmitter for receiving the base layer transport streams and the enhancement layer transport streams from the base layer transmission processor and the enhancement layer transmission processor, and modulating the base and enhancement layer transport streams into digital broadcasting signals.
Description
Technical field
The present invention relates to be used for DMB (DMB) transmission/receiving equipment of high-quality video service; And more specifically, relating to a kind of DMB transmission/receiving equipment, it can provide high-quality video service or Additional Services in the reverse compatibility of keeping with traditional DMB system.
Background technology
Fig. 1 is the block diagram that illustrates conventional digital multimedia broadcasting (DMB) transfer equipment.
As shown in Figure 1, traditional DMB transfer equipment comprises motion picture expert group 4 (MPEG-4) video encoder 111, MPEG-4 audio coder 113, MPEG-4 systematic encoder 120, mpeg 2 transport stream (TS) multiplexer 130, Read-Solomon (RS) encoder 140, convolutional deinterleaver 150 and digital audio broadcasting (DAB) transmitter 160.113 pairs of videos of MPEG-4 video encoder 111 and MPEG-4 audio coder and audio-source are encoded.120 pairs of Media Streams of MPEG-4 systematic encoder carry out objectification (objectizes) and synchronous, and 130 pairs of Media Streams of MPEG-2 TS multiplexer carry out multiplexed.RS encoder 140 usefulness act on the external encoder of additional error correction coding, and convolutional deinterleaver 150 is as the outer interleaver of the temporal correlation between the adjacent byte unit of removing in the data flow.DAB transmitter 160 receives by the stream of stream mode channel from convolutional deinterleaver 150 outputs, rheology is changed to digital broadcast signal, and exports this digital broadcast signal.
Thereafter, will be by describing DAB transmitter 160 in detail as example as the Eureka-147 DAB transmitter of European digital audio broadcast system.
Fig. 2 is the block diagram of digital audio broadcasting (DAB) transmitter of having described Fig. 1.The figure shows structure as the Eureka-147 DAB system of European DAB system.
As described in Figure 1, the DAB transmitter 160 that uses in traditional DMB transfer equipment comprises energy dissipation scrambler 161, convolution coder 162, time-interleaved device 163, symbol mapper 164, frequency interleaver 165, differential modulation device 166, fast adverse Fourier transform (IFFT) 167 and protection inserter 168 at interval.
The operation of the composed component of DAB transmitter 160 will according to operating sequence be described thereafter.
At first; the audio data stream or the general data stream that are input to behind the mpeg encoded of DAB transmitter 160 are input to energy dissipation scrambler 161; to disperse radio frequency (RF) to transmit the energy of signal; and being input to convolution coder 162, convolutional encoding is the different coding rate to distribute according to unequal error protection (UEP) or equal error protection (EEP).
In time-interleaved device 163, with respect to the part of 16 logical frame and each time-interleaved subchannel data are multiplexed in main service multiplexer (MSM), form public interleaving frame (CIF) thus.Here, because each logical frame comprises 24ms information in time domain, so it has the interleave depth of 384ms altogether.
Subsequently, by forming synchronizing channel, fast information channel in dab receiver (FIC) and being used for transmitting the main service channel (MSC) of valid data and carrying out the QPSK symbol mapped in symbol mapper 164, transmit frame to form the long DAB of 24ms, and in frequency interleaver 165, carry out frequency interlacing, so that the influence of relevant frequency selective fading minimizes.
Subsequently, the OFDM code element that form to transmit frame stands the zero padding (zero-padding) of 2N fast adverse Fourier transform (IFFT), and the OFDM symbol transformations that will transmit by the IFFT in the IFFT unit 167 behind the zero padding of frame is a time-domain signal.
The data that so-called protection 1/4th places, about back in the effective code element part at interval arrange are inserted in the protection position of inserter 168 before effective code element at interval, to remove inter symbol interference (ISI).
In the conventional digital media broadcasting method, when application had the convolutional encoding of 1/2 rate coding speed, available transfer rate was 1.152Mbps.When a channel applies two Video service, to each service assignment 576kbps transfer rate.
So even use very effective source code and the transfer rate of 776kbps is provided, also there is restriction in traditional DMB transfer equipment aspect the high-quality service providing.
Summary of the invention
Technical problem
So, the purpose of this invention is to provide a kind of DMB (DMB) transmission/receiving equipment, it can pass through hierarchical modulation, in the compatibility of keeping with the conventional digital multimedia system, provides high-quality DMB Video service and/or additional data service.
Another object of the present invention provides a kind of DMB transmission/receiving equipment, it can be by assigning stream as the source code method to basic layer and enhancement layer with scalable coding, and, provide high-quality DMB Video service by in receiver, receiving stream and utilize scalable coding/decoding method from basic layer and enhancement layer.
By the following description of the present invention and embodiment, other purpose of the present invention and advantage are appreciated that and become clear.And those of ordinary skills can understand, utilize means required for protection and combination thereof, can realize objects and advantages of the present invention.
Technical scheme
According to an aspect of the present invention, a kind of DMB (DMB) equipment that is used for the high-quality video service is provided, it comprises: source encoder, be used for audio signal and vision signal are carried out source code separately, to generate basic layer audio stream, basic layer video stream, enhancement layer audio stream and enhancement layer video stream; Basic layer transport processor is used for receiving base layer stream from this source encoder, and the executive system coding is multiplexed as transport stream with the base layer stream behind the coding, and the basic layer of output transport stream; The enhancement layer transport processor is used for receiving enhancement layer stream from this source encoder, and the executive system coding is multiplexed as the enhancement layer transport stream with the enhancement layer stream behind the coding, and output enhancement layer transport stream; With the layering digital broadcast transmitter, be used for receiving basic layer transport stream and enhancement layer transport stream from described basic layer transport processor and enhancement layer transport processor, and described fundamental sum enhancement layer transport stream is modulated to digital broadcast signal, wherein this layering digital broadcasting transfer member is modulated basic layer transport stream, to produce the base layer stream modulation signal thus, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer then shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated.
According to a further aspect in the invention, provide a kind of DMB transfer equipment that is used for the additional data service, it comprises: the additional data source encoder, be used for additional data is carried out source code, and the output enhancement layer stream; Basic layer source encoder is used for audio signal and vision signal are carried out source code, and the output base layer stream; Basic layer transport processor is used to receive this base layer stream, and the executive system coding is multiplexed as transport stream with the base layer stream behind the coding, and the basic layer of output transport stream; The enhancement layer transport processor is used to receive this enhancement layer stream, and the executive system coding is multiplexed as transport stream with the enhancement layer stream behind the coding, and output enhancement layer transport stream; With the layering digital broadcast transmitter, be used for receiving basic layer transport stream and enhancement layer transport stream from described basic layer transport processor and enhancement layer transport processor, and described fundamental sum enhancement layer transport stream is modulated to digital broadcast signal, wherein this layering digital broadcasting transfer member is modulated basic layer transport stream, producing the base layer stream modulation signal thus, and apply the code element that constellation based on the modulator approach of enhancement layer shines upon the enhancement layer transport stream by the position on the quadrant of in basic layer, determining then and come the enhancement layer transport stream is modulated.
According to a further aspect in the invention, a kind of DMB receiving equipment that is used for the high-quality video service is provided, it comprises: digital broadcasting transmitter, be used for receiving digital broadcast signal, this digital broadcast signal is separated into base layer stream and enhancement layer stream, export this enhancement layer stream, and by code element go to shine upon and this base layer stream of demodulation and export this demodulation after base layer stream, wherein digital broadcast signal comprises base layer stream and enhancement layer stream, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated; Basic layer receiving processor is used for the base layer stream after the demodulation is carried out channel-decoding, to produce transport stream thus, transport stream is separated multiplexed, executive system decoding, and output basic layer audio stream and basic layer video stream; The enhancement layer receiving processor is used to receive this enhancement layer stream, goes mapping to come this enhancement layer stream of demodulation by code element, carries out channel-decoding to produce transport stream thus; This transport stream is separated multiplexed, executive system decoding, and output enhancement layer audio stream and enhancement layer video stream; With scalable audio/video decoder, be used for this basic layer audio stream, basic layer video stream, enhancement layer audio stream and enhancement layer video stream are carried out scalable decoding.
According to a further aspect in the invention, provide a kind of DMB receiving equipment that is used for the additional data service, comprising: digital broadcasting transmitter is used for receiving digital broadcast signal; This digital broadcast signal is separated into base layer stream and enhancement layer stream, export this enhancement layer stream, and by code element go to shine upon and this base layer stream of demodulation and export this demodulation after base layer stream, wherein digital broadcast signal comprises base layer stream and enhancement layer stream, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated; Basic layer receiving processor is used for the base layer stream after the demodulation is carried out channel-decoding, to produce transport stream thus, transport stream is separated multiplexed, executive system decoding, and output basic layer audio stream and basic layer video stream; The enhancement layer receiving processor is used to receive this enhancement layer stream, goes mapping to come this enhancement layer stream of demodulation by code element, carries out channel-decoding to produce additional data thus; Audio/video decoder is used for decoding and output basic layer audio stream and basic layer video stream; And additional data decoder, be used for decoding and export this additional data.
Advantageous effects
The present invention provides high-quality video service and additional data service in the compatibility of keeping with the conventional digital multimedia broadcasting network.
And the present invention is by adding the hierarchical modulation function to traditional DMB transfer system, and the high-quality video service with available transfer rate higher than traditional DMB system is provided, and more multicast service channel is provided simultaneously.
Description of drawings
According to the following description to preferred embodiment that provides in conjunction with the accompanying drawings, above and other purpose of the present invention and feature will become obviously, wherein:
Fig. 1 is the block diagram that illustrates conventional digital multimedia broadcasting (DMB) transfer equipment;
Fig. 2 is the block diagram of digital audio broadcasting (DAB) transmitter of having described Fig. 1;
Fig. 3 shows the block diagram according to the DMB transfer equipment that is used for the high-quality video service of the embodiment of the invention;
Fig. 4 is the block diagram that illustrates the enhancement layer transport processor of Fig. 3;
Fig. 5 is a detailed diagram of having described the enhancement layer transport processor of Fig. 3;
Fig. 6 is the block diagram that illustrates the layering DAB transmitter of Fig. 3;
Fig. 7 shows the constellation of π/4 Quadrature Phase Shift Keying (QPSK) signal;
Fig. 8 show according to the embodiment of the invention have a bit additional information and in the layering symbol mapped according to the constellation of the signal of 2-ASK modulator approach symbol mapped;
Fig. 9 show according to the embodiment of the invention have the dibit additional information and in the layering symbol mapped according to the constellation of the signal of QPSK modulator approach symbol mapped;
Figure 10 is the block diagram of having described according to the DMB transfer equipment that is used for the additional data service of the embodiment of the invention;
Figure 11 is the block diagram that illustrates according to the DMB receiving equipment that is used for the high-quality video service of the embodiment of the invention;
Figure 12 is a block diagram of having described the DAB receiver of Figure 11;
Figure 13 is that the DMB that is used for the high-quality video service that has described according to the embodiment of the invention receives the flow chart of handling; With
Figure 14 shows the block diagram according to the DMB receiving equipment that is used for the additional data service of the embodiment of the invention.
Embodiment
The principle of the present invention of only below having described illustration.Even clearly do not describe in this manual or illustrate them, those of ordinary skills also can implement principle of the present invention and various creationary equipment in design of the present invention and scope.
Condition term that presents in this specification and the use of embodiment only are intended to make design easy to understand of the present invention, and their embodiment and conditions of being not limited to mention in the specification.
In addition, for the 26S Proteasome Structure and Function equivalence that should be understood to include them that has a detailed description of principle of the present invention, viewpoint and embodiment and specific embodiment.These equivalences not only comprise current known equivalence, and comprise the equivalence of exploitation in the future, promptly by invention for carrying out all devices of identical function, no matter their structure how.
For example, block diagram of the present invention should be understood that to show the notion viewpoint of the exemplary circuit of implementing principle of the present invention.Similarly, all flow charts, state transition diagram, false code etc. can be expressed in computer-readable medium basically, and no matter whether clearly described computer or processor, they all should be understood that to express the various processing of computer or processor operations.
Being expressed as the function of the various devices that the picture in picture that comprises functional block of processor shows or similar design not only can provide by the hardware that use is exclusively used in this function, and can provide by using the hardware that can move the suitable software that is used for this function.When processor provided function, this function can be provided by single application specific processor, single common processor or a plurality of separate processor, and the part of these processors can be shared.
Clearly the using of term " processor ", " control " or similar design should not be understood that to represent exclusively can operating software (a piece of) hardware, and should be understood that impliedly to comprise digital signal processor (DSP), hardware and ROM, the RAM and the nonvolatile memory that are used for storing software.Here also can comprise other known and usual hardware.
By the following description of embodiment being carried out with reference to accompanying drawing proposed below, other purpose of the present invention and aspect will become obvious.For the given identical Reference numeral of components identical, although element appears among the different figure.In addition, if determine to make inventive point of the present invention fuzzy, then will not provide a description for describing in further detail of related art.Describe reference diagram in detail the preferred embodiments of the present invention thereafter.
Fig. 3 shows the block diagram according to the DMB transfer equipment that is used for the high-quality video service of the embodiment of the invention,
As shown in Figure 3, this DMB transfer equipment comprises motion picture expert group 4 (MPEG-4) scalable video decoder 211, the scalable audio coder 213 of MPEG-4, enhancement layer transport processor 220, basic layer transport processor 230 and layering digital audio broadcasting (DAB) transmitter 240.
MPEG-4 scalable video decoder 211 generates the enhancement layer video stream that flows and be used to improve quality with the basic layer video of traditional DMB system compatible from video source, and described basic layer video stream and enhancement layer video stream are outputed to basic layer transport processor 230 and enhancement layer transport processor 220 respectively.
The scalable audio coder 213 of MPEG-4 generates with the basic layer audio stream of traditional DMB system compatible from audio-source and is used to improve the enhancement layer audio stream of quality, and will described basic layer audio stream and the enhancement layer audio stream output to basic layer of transport processor 230 and enhancement layer transport processor 220 respectively.
Here, for example can utilizing, the various scalable technology of time scalability, spatial scalability and signal to noise ratio (snr) scalability generates enhancement layer video stream and enhancement layer audio stream.Because scalable technology is for the technical staff of the technical field of the invention widely knows, so detailed description to them will be provided here.The background technology of the present invention that tradition DMB normative document ETSI EN 300 401 can be called as at embodiments of the invention., when describe when of the present invention, the content that in this normative document describe will be in specification do not described, and the part of the new proposition the technology in normative document will be described in detail thereafter.
With reference to figure 4, basic layer transport processor 230 comprises MPEG-4 systematic encoder 120, mpeg 2 transport stream (TS) multiplexer (MUX) 130, Read-Solomon (RS) encoder 140 and convolutional deinterleaver 150.The function of these composed components is described with reference to figure 1.
Basic layer video stream and basic layer audio stream that the traditional DMB of basic layer transport processor 230 processing system is supported.120 pairs of MPEG-4 systematic encoders carry out objectification respectively from a basic layer videos stream and the basic layer audio stream that MPEG-4 scalable video decoder 211 and the scalable audio coder 213 of MPEG-4 transmit, and make basic layer video and audio stream synchronized with each other.Then, MPEG-2 TS multiplexer 130 is multiplexed as basic layer transport stream with basic layer video and audio stream, and 140 pairs of basic layer transport stream of RS encoder are carried out error correction coding.Subsequently, convolutional deinterleaver 150 is removed the temporal correlation between the adjacent byte unit in the stream, and the result is outputed to layering DAB transmitter 240.
Except the structure of above-mentioned traditional DAB transmitter, layering DAB transmitter 240 comprises the layering symbol mapper that is used to handle base layer stream and enhancement layer stream.To describe layering DAB transmitter 240 in detail with reference to figure 6.
Fig. 5 is a detailed diagram of describing the enhancement layer transport processor 220 of Fig. 3.As shown in the figure, enhancement layer transport processor 220 comprises MPEG-4 systematic encoder 221, MPEG-2 TS multiplexer 222, energy dissipation scrambler 223, channel encoder 224 and time-interleaved device 225.
221 pairs of enhancement layer video streams of MPEG-4 systematic encoder and enhancement layer audio stream carry out objectification, make these streams synchronously, and the stream is synchronously outputed to MPEG-2 TS multiplexer 222.
MPEG-2 TS multiplexer 222 will be multiplexed as the enhancement layer transport stream from enhancement layer video stream and the enhancement layer audio stream that MPEG-4 systematic encoder 221 transmits, and export this enhancement layer transport stream.
Energy dissipation scrambler 223 receives this enhancement layer transport stream, and the enhancement layer transport stream that is received is carried out the energy dissipation that transmits signal.Here, can carry out energy dissipation based on the diffusion multinomial of aforesaid standards document ETSI EN 300 401.
Enhancement layer transport stream after the diffusion of channel encoder 224 received energies, and the coded wireless communication channel is to have the robust error correction.The example of error-correcting channel coding comprises RS coding, convolutional encoding, low-density checksum (LDPC) coding, turbo coding and concatenated coding method thereof.By using the rate-compatible punctured code (RCPC) that the variable channel code rate can be provided maybe can change the structure of the code rate of channel code, carry out the error-correcting channel coding.
Time-interleaved device 225 is the structures that are used for spreading the error that the decline by wireless transfer channel causes.In the present embodiment, time-interleaved device 225 comes the time of implementation to interweave by using the time-interleaved method that defines in the aforesaid standards document, and output bit flow.Be imported into the layering symbol mapper 241 of layering DAB transmitter 240 from the bit stream of time-interleaved device 225 outputs, this will be described after a while.
Fig. 6 is the block diagram that illustrates the layering DAB transmitter 240 of Fig. 3.As shown in the figure, except above structure with reference to figure 2 described traditional DAB transmitters, layering DAB transmitter 240 comprises layering symbol mapper 241.
More specifically; except comprising energy dissipation scrambler 161, convolution coder 162, time-interleaved device 163, symbol mapper 164, frequency interleaver 165, differential modulation device 166, IFFT 167 and protection at interval the composed component of traditional DAB transmitter of inserter 168, layering DAB transmitter 240 is included in the layering symbol mapper 241 between differential modulation device 166 and fast adverse Fourier transform (IFFT) unit 167.Thereafter, with the new layering symbol mapper that proposes among the present invention who is described among the composed component of layering DAB transmitter 240.Here traditional composed component will not described.
Layering symbol mapped of the present invention is handled as follows.By carrying out Quadrature Phase Shift Keying (QPSK) is that basic layer transport stream distributed dibit in symbol mapper 164, and determines the position of quadrant line in differential modulation device 166 based on this dibit.Here, quadrant refers to the real number and the axis of imaginaries of rotation π/4.
The enhancement layer transport stream stands any in 2-amplitude shift keying (2-ASK), Quadrature Phase Shift Keying (QPSK), 16-quadrature amplitude modulation (qam) and other the similar modulator approach.Except this dibit that is used for basic layer, the 2-ASK method can be distributed a bit, and QPSK can distribute dibit, to guarantee additional transfer rate.16-QAM can distribute 4 bits, to guarantee additional transfer rate.Apply constellation based on the modulator approach of enhancement layer, the code element of shining upon enhancement layer by the position on the quadrant of in basic layer, determining.
Layering symbol mapped method of the present invention thereafter reference example is described.
When being defined as y by the kQPSK code element that basic layer transport stream carried out the 1OFDM code element of frequency interlacing acquisition
L, kThe time, the output z of the differential modulation device 166 of basic layer transport stream
b L, kCan such as equation 1 definition.
z
b l，k＝z
b l-1，k·y
l，k(l＝2，3，4，...，L，-K/2≤k≤K/2)
Wherein L represents the number of OFDM code element; K represents the number of multicarrier, and z
b L, kIn phase reference code element generator (not shown), generate.
When the k carrier wave with the 1st OFDM of enhancement layer transport stream is defined as z
e L, kThe time, the output z of layering symbol mapper 241
L, kCan be as equation 2 definition.
z
L, k=ζ (z
Bl, k, z
e L, k) equation 2
Wherein represent layering symbol mapped function, and determine based on the number of the additional information bits of modulator approach and enhancement layer.
According to the embodiment of layering symbol mapper 241, when the additional information of enhancement layer is 1 bit and when using the 2-ASK modulation, layering symbol mapper 241 can be designed to following equation 3.
Equation 3
Wherein a is the constant greater than 0.
Fig. 8 show according to the embodiment of the invention have a bit additional information and in the layering symbol mapped according to the constellation of the signal of 2-ASK modulator approach symbol mapped.Constellation shown in the stain is the constellation of the signal after the symbol mapped of basic layer among Fig. 4, and constellation shown in the white point is the constellation of the signal after the symbol mapped of enhancement layer.
According to another embodiment of layering symbol mapped, when the additional information of enhancement layer is a dibit and when using the QPSK modulation, layering symbol mapped function as shown in the following Table 1.Presented constellation among Fig. 9 based on the signal after the symbol mapped of table 1.
Table 1
Wherein A represents and z
e L, kCorresponding information bit; B represents and z
b L, kCorresponding information bit; And a is the constant greater than 0.
When the additional information of enhancement layer during, can expand layering symbol mapped constellation according to similar approach based on basic layer information and enhanced layer information more than three bits.
Basically, suppose in the structure of DMB frame, only to use enhancement layer to the actual channel (being MSC) that passes through that transmits of data.Yet, if necessary, may be to MSC with as providing the FIC of the channel of system information to use enhancement layer.And, can transmit the information of relevant hierarchical modulation by FIC, for example whether use hierarchical modulation, the modulator approach of when using layer information, using, the code rate and the information on services relevant of channel encoder, make the DMB receiving equipment receive the information of enhancement layer with enhancement layer.
Figure 10 is the block diagram of describing according to the DMB transfer equipment that is used for the additional data service of the embodiment of the invention.
Enhancement layer can be used as the additional transfer channel that Additional Services are provided, rather than for the aforementioned purpose that high-quality service is provided.In other words, can provide the additional video service by the additional source encoder that use is used for enhancement layer.Additional video service can be relevant with basic layer, for example three-dimensional video-frequency and multi-view point video, and perhaps it can be independent with different service.
As shown in figure 10, being used to of proposing among the present invention provides the DMB transfer equipment of additional data service to comprise additional data source encoder 115, enhancement layer transport processor 220, MPEG-4 video encoder 111, MPEG-4 audio coder 113, basic layer transport processor 230 and layering DAB transmitter 240.
The data of 115 pairs of Additional Services of additional data source encoder encode and output encoder after additional data.Enhancement layer transport processor 220 will be treated to above-mentioned enhancement layer signal from the additional data of additional data source encoder 115 outputs.The video and audio signal of MPEG-4 video and audio coder 111 and 113 pairs of basic layers is encoded, and exports basic layer video and audio signal respectively.Basic layer transport processor 230 receives and handles from the base layer signal of MPEG-4 video encoder 111 and 113 outputs of MPEG-4 audio coder.MPEG-4 video encoder 111, MPEG-4 audio coder 113, enhancement layer transport processor 220, basic layer transport processor 230 and layering DAB transmitter 240 are worked as mentioned above.
According to the current embodiment that wherein transmits the packet be used for various additional datas services, may combine with the various services that provide in the traditional DMB system or provide the additional data service independently with traditional services by enhancement layer.
Figure 11 is the block diagram that illustrates according to the DMB receiving equipment that is used for the high-quality video service of the embodiment of the invention, and Figure 12 is a block diagram of having described the DAB receiver of Figure 11.
As shown in figure 11, the DMB receiving equipment that is used for the high-quality video service comprises DAB receiver 310, basic layer receiving processor 320, enhancement layer receiving processor 330, MPEG-4 scalable video decoder 340 and the scalable audio decoder 350 of MPEG-4.
Basic layer receiving processor 320 is and the identical composed component of traditional DMB receiver, and it comprises convolutional decoder 321, RS decoder 322, TS demultiplexer 323 and MPEG-4 system decoder 324.Enhancement layer receiving processor 330 comprises that the layering code element removes mapper 331, time deinterleaver 332, channel decoder 333, energy dissipation descrambler 334, TS demultiplexer 335 and MPEG-4 system decoder 336.Enhancement layer receiving processor 330 comes enhancement layer signal is decoded by the processing opposite with the encoding process of the above-mentioned DMB transfer equipment that is used for the high-quality video service.
With reference to Figure 12, DAB receiver 310 is Eureka 147 DAB receiving equipments, comprises that RF tuner 311, AD converter 312, FFT 313, differential ference spiral device 314, frequency deinterleaver 315, code element remove mapper 316, time deinterleaver 317, convolutional decoder 318 and energy dissipation descrambler 319.
Specifically, the frequency deinterleaver 315 of DAB receiver 310 is separated into input signal two signals that are used for base layer stream and enhancement layer stream.Carry out channel-decoding according to the processing identical to one in two signals with traditional DMB receiver, and another signal outputed to enhancement layer receiving processor 330, and go mapper 331, time deinterleaver 332, channel decoder 333 and energy dissipation descrambler 334 that it is carried out channel-decoding by the layering code element.
In TS demultiplexer 323 and 335 stream behind the two-layer channel-decoding being separated into video, audio frequency and various additional information divides into groups, and in MPEG-4 system decoder 324 and 336 by unpack (de-packetization) and flow between synchronously, and extract them as this two-layer video and audio stream.
The scalable audio decoder 350 of MPEG-4 scalable video decoder 340 and MPEG-4 is carried out scalable decoding based on the correlation between basic layer and the enhancement layer to this two-layer video flowing and audio stream, to provide high-quality video and audio frequency to the user thus.
Therebetween, when DMB receiving equipment of the present invention received from broadcast singal that traditional DMB system transmits, it only extracted base layer stream, and the video and the audio frequency of gross are provided by the decoding processing identical with traditional DMB receiving system.
Figure 13 is that the DMB that is used for the high-quality video service that describes according to the embodiment of the invention receives the flow chart of handling.
At step S110, Eureka-147 DAB receiving equipment receiving broadcast signal.At step S120, the various information on services of the FIC transmission of transmission frame are passed through in multiplexed and analysis.At step S130, extract the information relevant, out of Memory multiplexed or that be correlated with service, to obtain broadcast channel information with broadcasting channel.
When broadcast channel information indicates broadcasting is when comprising the high-quality broadcasting of basic layer information and enhanced layer information, at step S151, broadcast singal to be separated into this two-layer stream, and to stand independent channel-decoding and handle.At step S152, carry out the medium decoding based on MPEG-2 and MPEG-4, and, provide high-quality service at step S153.
, when the broadcast message of obtaining indicates traditional broadcast, only extract base layer stream therebetween, and in step S141 and S142, carry out the decoding of channel-decoding and medium respectively, the same with in traditional DMB receiving equipment.Then, at step S143, provide the service of gross.
Figure 14 shows the block diagram according to the DMB receiving equipment that is used for the additional data service of the embodiment of the invention.
As described in Figure 14, the DMB receiving equipment comprises DAB receiver 310, basic layer receiving processor 320, enhancement layer receiving processor 330, MPEG-4 Video Decoder 410, MPEG-4 audio decoder 420 and additional data decoder 430.
MPEG-4 Video Decoder 410 and MPEG-4 audio decoder 420 receive from the basic layer video stream of basic layer receiving processor output and basic layer audio stream, and basic layer video and audio stream are carried out decoding, and the base layer stream behind the output decoder.
The present invention includes korean patent application 2005-0090067 and 2006-0065109 number relevant theme of submitting to Korea S Department of Intellectual Property with on September 27th, 2005 and on July 11st, 2006, merge its full content by reference here.
Although described the present invention at some preferred embodiment, those of ordinary skills will be clear that, can carry out various changes and distortion, and not break away from the scope of the present invention that limits in the following claim.
Claims (29)
1. one kind is used for DMB (DMB) equipment that high-quality video is served, and comprising:
The source code parts are used for audio signal and vision signal are carried out source code separately, to generate basic layer audio stream, basic layer video stream, enhancement layer audio stream and enhancement layer video stream;
Basic layer transmits processing unit, is used for receiving base layer stream from these source code parts, and the executive system coding is multiplexed as transport stream with the base layer stream behind the coding, and the basic layer of output transport stream;
Enhancement layer transmits processing unit, is used for receiving enhancement layer stream from these source code parts, and the executive system coding is multiplexed as the enhancement layer transport stream with the enhancement layer stream behind the coding, and output enhancement layer transport stream; With
Layering digital broadcasting transfer member is used for transmitting processing unit and enhancement layer transmission processing unit reception basic layer transport stream and enhancement layer transport stream from described basic layer, and described fundamental sum enhancement layer transport stream is modulated to digital broadcast signal,
Wherein this layering digital broadcasting transfer member is modulated basic layer transport stream, to produce the base layer stream modulation signal thus, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer then shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated.
2. according to the equipment of claim 1, wherein these source code parts comprise:
Scalable video decoder is used for by using scalability techniques to generate with the basic layer video stream of existing DMB system compatible and be used to have the enhancement layer video stream that the high-quality video of the available transfer rate higher than existing DMB system is served from video source; With
Scalable audio coder is used for by using scalability techniques to generate with the basic layer audio stream of existing DMB system compatible and be used to have the enhancement layer audio stream that the high quality audio of the available transfer rate higher than existing DMB system is served from audio-source.
3. according to the equipment of claim 1, wherein should basic layer transmission processing unit comprise:
Systematic encoder is used for base layer stream is carried out objectification and synchronous;
The transport stream multiplexer is used for the output stream of this systematic encoder is multiplexed as mpeg 2 transport stream (TS), and the basic layer of output transport stream;
External encoder is used for the basic layer transport stream from this transport stream multiplexer output carried out additional error correction coding; With
Outer interleaver is used for removing from the temporal correlation between the adjacent byte unit of the stream of this external encoder output.
4. according to the equipment of claim 3, wherein this external encoder is Read-Solomon (RS) encoder.
5. according to the equipment of claim 3, wherein this outer interleaver is a convolutional deinterleaver.
6. according to the equipment of claim 1, wherein this enhancement layer transmission processing unit comprises:
Systematic encoder is used for enhancement layer stream is carried out objectification and synchronous;
The transport stream multiplexer is used for the stream from systematic encoder output is multiplexed as the enhancement layer transport stream;
The energy dissipation scrambler is used for the enhancement layer transport stream is carried out energy dissipation;
Channel encoder is used for the enhancement layer transport stream after the energy dissipation is carried out chnnel coding, to have the robust error correction for wireless transfer channel; With
Time-interleaved device is used for the time of implementation to interweave with the caused error of the decline of spreading wireless transfer channel, and the output enhancement layer bit-stream.
7. according to the equipment of claim 6, wherein this enhancement layer transport stream is a mpeg 2 transport stream.
8. according to the equipment of claim 6, wherein this channel encoder is carried out chnnel coding by use any that select from the group that comprises RS sign indicating number, convolution code, low-density checksum (LDPC) sign indicating number, turbo sign indicating number and concatenated code thereof.
9. according to the equipment of claim 1, wherein this layering digital broadcasting transfer member comprises:
Symbol mapper is used for basic layer transport stream carried out symbol mapped, to produce the signal after the symbol mapped thus;
Frequency interleaver is used for the signal after the symbol mapped is carried out frequency interlacing, to produce the signal behind the frequency interlacing thus;
The differential modulation device is used for the signal behind the frequency interlacing is carried out differential modulation; With
The layering symbol mapper is used for coming the enhancement layer transport stream is carried out symbol mapped based on the basic layer modulation signal that transmits from this differential modulation device.
10. according to the equipment of claim 9, wherein this symbol mapper is carried out Quadrature Phase Shift Keying (QPSK) symbol mapped to basic layer transport stream, and this differential modulation device generates phase reference signal, and Orthodoxy Frequency Division Multiplex (OFDM) code element that constitutes fast information channel in dab receiver (FIC) and main service channel (MSC) is carried out differential modulation.
11. according to the equipment of claim 9, wherein this layering symbol mapper after based on the symbol mapped of this basic layer transport stream modulation signal and the enhancement layer transport stream is carried out the 2-ASK modulation.
12. according to the equipment of claim 11, wherein this layering symbol mapper is carried out symbol mapped based on following equation to the enhancement layer transport stream:
Wherein a is the constant greater than 0; z
b L, kIt is the modulation signal of basic layer transport stream; z
e L, kIt is the code element of k carrier wave of the l OFDM code element of enhancement layer transport stream; L=2,3,4 ..., L;-K/2≤k≤K/2; L represents the number of OFDM code element; And K represents the number of multicarrier.
13. according to the equipment of claim 9, wherein the modulation signal of this layering symbol mapper after based on the symbol mapped of this basic layer transport stream carried out the QPSK modulation to this enhancement layer transport stream.
14. according to the equipment of claim 9, wherein the modulation signal of this layering symbol mapper after based on the symbol mapped of this basic layer transport stream carried out the 16-QAM modulation to this enhancement layer transport stream.
15. DMB (DMB) transfer equipment that is used for the additional data service comprises:
Additional data source code parts are used for additional data is carried out source code, and the output enhancement layer stream;
Basic layer source code parts are used for audio signal and vision signal are carried out source code, and the output base layer stream;
Basic layer transmits processing unit, is used to receive this base layer stream, and the executive system coding is multiplexed as transport stream with the base layer stream behind the coding, and the basic layer of output transport stream;
Enhancement layer transmits processing unit, is used to receive this enhancement layer stream, and the executive system coding is multiplexed as transport stream with the enhancement layer stream behind the coding, and output enhancement layer transport stream; With
Layering digital broadcasting transfer member is used for transmitting processing unit and enhancement layer transmission processing unit reception basic layer transport stream and enhancement layer transport stream from described basic layer, and described fundamental sum enhancement layer transport stream is modulated to digital broadcast signal,
Wherein this layering digital broadcasting transfer member is modulated basic layer transport stream, producing the base layer stream modulation signal thus, and apply the code element that constellation based on the modulator approach of enhancement layer shines upon the enhancement layer transport stream by the position on the quadrant of in basic layer, determining then and come the enhancement layer transport stream is modulated.
16., wherein should basic layer transmission processing unit comprise according to the equipment of claim 15:
Systematic encoder is used for this base layer stream is carried out objectification and synchronous;
The transport stream multiplexer is used for the output stream of this systematic encoder is multiplexed as mpeg 2 transport stream (TS), and the basic layer of output transport stream;
External encoder is used for the basic layer transport stream from this transport stream multiplexer output carried out additional error correction coding; With
Outer interleaver is used for removing from the temporal correlation between the adjacent byte unit of the stream of this external encoder output.
17. according to the equipment of claim 15, wherein this enhancement layer transmission processing unit comprises:
Systematic encoder is used for enhancement layer stream is carried out objectification and synchronous;
The transport stream multiplexer is used for the stream from systematic encoder output is multiplexed as the enhancement layer transport stream;
The energy dissipation scrambler is used for the enhancement layer transport stream is carried out energy dissipation;
Channel encoder is used for the enhancement layer transport stream after the energy dissipation is carried out chnnel coding, to have the robust error correction for wireless transfer channel; With
Time-interleaved device is used for the time of implementation to interweave with the caused error of the decline of spreading wireless transfer channel, and the output enhancement layer bit-stream.
18. according to the equipment of claim 15, wherein this layering digital broadcasting transfer member comprises:
Symbol mapper is used for basic layer transport stream carried out symbol mapped, to produce the signal after the symbol mapped thus;
Frequency interleaver is used for the signal after the symbol mapped is carried out frequency interlacing, to produce the signal behind the frequency interlacing thus;
The differential modulation device is used for the signal behind the frequency interlacing is carried out differential modulation; With
The layering symbol mapper is used for coming the enhancement layer transport stream is carried out symbol mapped based on the basic layer modulation signal that transmits from this differential modulation device.
19. equipment according to claim 18, wherein this symbol mapper is carried out Quadrature Phase Shift Keying (QPSK) symbol mapped to basic layer transport stream, and this differential modulation device generates phase reference signal, and Orthodoxy Frequency Division Multiplex (OFDM) code element that constitutes fast information channel in dab receiver (FIC) and main service channel (MSC) is carried out differential modulation.
20. according to the equipment of claim 18, wherein this layering symbol mapper after based on the symbol mapped of this basic layer transport stream modulation signal and the enhancement layer transport stream is carried out the 2-ASK modulation.
21. according to the equipment of claim 20, wherein this layering symbol mapper is carried out symbol mapped based on following equation to the enhancement layer transport stream:
Wherein a is the constant greater than 0; z
b L, kIt is the modulation signal of basic layer transport stream; z
e L, kIt is the code element of k carrier wave of the l OFDM code element of enhancement layer transport stream; L=2,3,4 ..., L;-K/2≤k≤K/2; L represents the number of OFDM code element; And K represents the number of multicarrier.
22. according to the equipment of claim 18, wherein the modulation signal of this layering symbol mapper after based on the symbol mapped of this basic layer transport stream carried out the QPSK modulation to this enhancement layer transport stream.
23. according to the equipment of claim 18, wherein the modulation signal of this layering symbol mapper after based on the symbol mapped of this basic layer transport stream carried out the 16-QAM modulation to this enhancement layer transport stream.
24. DMB (DMB) receiving equipment that is used for the high-quality video service comprises:
Digital broadcasting transmitter, be used for receiving digital broadcast signal, this digital broadcast signal is separated into base layer stream and enhancement layer stream, export this enhancement layer stream, and by code element go to shine upon and this base layer stream of demodulation and export this demodulation after base layer stream, wherein digital broadcast signal comprises base layer stream and enhancement layer stream, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated;
Basic layer receiving processor is used for the base layer stream after the demodulation is carried out channel-decoding, to produce transport stream thus, transport stream is separated multiplexed, executive system decoding, and output basic layer audio stream and basic layer video stream;
The enhancement layer receiving processor is used to receive this enhancement layer stream, goes mapping to come this enhancement layer stream of demodulation by code element, carry out channel-decoding to produce transport stream thus, this transport stream is separated multiplexed, executive system decoding, and output enhancement layer audio stream and enhancement layer video stream; With
Scalable audio/video decoder is used for this basic layer audio stream, basic layer video stream, enhancement layer audio stream and enhancement layer video stream are carried out scalable decoding.
25. according to the DMB receiving equipment of claim 24, wherein this digital broadcasting transmitter uses Eureka 147 digital audio broadcastings (DAB) receiver.
26. according to the DMB receiving equipment of claim 25, wherein this base layer stream is to separate from the frequency deinterleaver of this Eureka 147DAB receiver with this enhancement layer stream.
27. according to the DMB receiving equipment of claim 24, wherein this enhancement layer receiving processor comprises:
The layering code element is removed mapper, is used for that enhancement layer stream is carried out code element and goes mapping;
Channel decoder, the enhancement layer stream after being used for this code element gone to shine upon is carried out channel-decoding;
Demultiplexer is used for the enhancement layer stream behind the channel-decoding is separated into video packets and audio packet, and execution is separated multiplexed; With
System decoder is used for the Voice ﹠ Video grouping of separating after multiplexed is unpacked, carry out between the stream synchronously, and output enhancement layer audio stream and enhancement layer video stream.
28. digital multiplex broadcasting (DMB) receiving equipment that is used for the additional data service comprises:
Digital broadcasting transmitter is used for receiving digital broadcast signal; This digital broadcast signal is separated into base layer stream and enhancement layer stream, export this enhancement layer stream, and by code element go to shine upon and this base layer stream of demodulation and export this demodulation after base layer stream, wherein digital broadcast signal comprises base layer stream and enhancement layer stream, and the constellation that applies based on the modulator approach of enhancement layer by the position on the quadrant of determining in basic layer shines upon the code element of enhancement layer transport stream, and the enhancement layer transport stream is modulated;
Basic layer receiving processor is used for the base layer stream after the demodulation is carried out channel-decoding, to produce transport stream thus, transport stream is separated multiplexed, executive system decoding, and output basic layer audio stream and basic layer video stream;
The enhancement layer receiving processor is used to receive this enhancement layer stream, goes mapping to come this enhancement layer stream of demodulation by code element, carries out channel-decoding to produce additional data thus;
Audio/video decoder is used for decoding and output basic layer audio stream and basic layer video stream; With
Additional data decoder is used for decoding and exports this additional data.
29. according to the DMB receiving equipment of claim 28, wherein this digital broadcasting transmitter uses Eureka 147 digital audio broadcastings (DAB) receiver.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20050090067 | 2005-09-27 | ||
| KR10-2005-0090067 | 2005-09-27 | ||
| KR1020050090067 | 2005-09-27 | ||
| KR1020060065109 | 2006-07-11 | ||
| KR10-2006-0065109 | 2006-07-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101273627A CN101273627A (en) | 2008-09-24 |
| CN100583977C true CN100583977C (en) | 2010-01-20 |
Family
ID=40006465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680035856A Expired - Fee Related CN100583977C (en) | 2005-09-27 | 2006-09-27 | Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100583977C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2400748A4 (en) * | 2009-02-03 | 2013-04-24 | Korea Electronics Telecomm | Transmission method, transmission apparatus, receiving method, and receiving apparatus for a digital multimedia broadcast service |
| JP4993224B2 (en) * | 2009-04-08 | 2012-08-08 | ソニー株式会社 | Playback apparatus and playback method |
| CN101945261B (en) * | 2009-07-07 | 2014-03-12 | 中兴通讯股份有限公司 | Hierarchical delivery and receiving method and device in mobile multimedia broadcasting system |
| CN102480634B (en) * | 2010-11-24 | 2015-12-16 | 中兴通讯股份有限公司 | The method, apparatus and system that in Mobile Multimedia Broadcasting, classified service is synchronous |
| CN102098542A (en) * | 2010-12-15 | 2011-06-15 | 中兴通讯股份有限公司 | Multi-media data transmission method, system and device |
| CN106170960B (en) * | 2014-05-09 | 2020-01-03 | 韩国电子通信研究院 | Signal multiplexing apparatus and signal multiplexing method using hierarchical division multiplexing |
| US20150373376A1 (en) * | 2014-06-20 | 2015-12-24 | Qualcomm Incorporated | Systems and methods for selectively signaling different numbers of video signal information syntax structures in a parameter set |
| CN109565612B (en) * | 2016-08-22 | 2021-09-03 | 索尼公司 | Transmission device, transmission method, reception device, and reception method |
| CN108777605B (en) * | 2018-05-24 | 2020-04-07 | 西安电子科技大学 | Multi-chain SC-LDPC coding method suitable for block fading channel |
| CN111131165B (en) * | 2019-11-27 | 2021-09-24 | 重庆邮电大学 | DMB video pushing method based on multi-description coding |
| CN115379231A (en) * | 2021-05-19 | 2022-11-22 | Oppo广东移动通信有限公司 | Method for transmitting and receiving image data, terminal, chip and storage medium |
-
2006
- 2006-09-27 CN CN200680035856A patent/CN100583977C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101273627A (en) | 2008-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100583977C (en) | Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service | |
| KR100721539B1 (en) | Apparatus for Transmitting and Receiving Digital Multimedia Broadcasting for Providing High Quality Video Service | |
| KR100819266B1 (en) | Method and apparatus for transmitter and receiver of supporting priority data transmission in a digital audio broadcasting system | |
| CN102123297B (en) | System and method for digital multimedia broadcasting | |
| CN101601290B (en) | Apparatus and method for digital multimedia broadcasting service | |
| JP4208965B2 (en) | Method and system for OFDM multi-carrier transmission of digital broadcasting signals | |
| CN105144616B (en) | Method and apparatus for transmission and reception of in-band on-channel radio signals including complementary low density parity check coding | |
| US9882731B2 (en) | Broadcasting signal transmitter/receiver and broadcasting signal transmission/reception method | |
| US10027518B2 (en) | Broadcasting signal transmitter/receiver and broadcasting signal transmission/reception method | |
| US8498312B2 (en) | Transmission of physical layer signaling in a broadcast system | |
| CN100581063C (en) | Method and apparatus for interleaving signal bits in digital audio broadcasting system | |
| CN107409003A (en) | The method and apparatus for receiving broadcast singal, and the method and apparatus for sending broadcast singal | |
| WO2018155544A1 (en) | Broadcast system | |
| EP1938596A1 (en) | Apparatus for transmitting and receiving digital multimedia broadcasting for high-quality video service | |
| CN102652415A (en) | Digital communications receiver | |
| WO2013023616A1 (en) | Method and device for sending and receiving system information in digital audio broadcast system | |
| CN102326349A (en) | Numeral transmission and/or receiving equipment and method thereof | |
| KR20060072574A (en) | Digital multimedia broadcasting transmitter and receiver | |
| EP2145478A1 (en) | Apparatus for channel encoding for enhancement layer of digital multimedia broadcasting transmitter, digital multimedia broadcasting transmitter system, digital multimedia broadcasting receiving system and expansion-form of fig 0/1 | |
| JP2000244443A (en) | Bst-ofdm signal generation and distribution device | |
| EP2153604A1 (en) | Ofdm signal transmission apparatus and method | |
| KR20060070133A (en) | Digital multimedia broadcasting transmitter and receiver | |
| KR20080105907A (en) | Ofdm transmitting/receiving apparatus and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20140927 |
|
| EXPY | Termination of patent right or utility model |