KR101527031B1 - method of receiving a braodcast signal and apparatus thereof - Google Patents

Abstract

The present invention relates to a broadcast signal receiving method and a broadcast signal receiving apparatus. An embodiment of the present invention provides a tuner for tuning a broadcast signal according to a digital video broadcasting (DVB) broadcasting system, a tuner for demodulating the broadcast signal output from the tuner, and a transmission parameter signaling (TPS Demodulation unit for demultiplexing the broadcast signal to obtain identification information capable of identifying at least one of a DVB-H broadcast signal and a DVB-T broadcast signal from the broadcast information, a demultiplexer for demultiplexing the broadcast signal, And a display unit for displaying a DVB-H broadcast signal or a DVB-T broadcast signal according to the service list.

Broadcast, DVB, DVB-H, DVB-T, NIT, SDT, TPS

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and apparatus for receiving broadcast signals,

The present invention relates to a broadcast signal receiving method and a broadcast signal receiving apparatus.

As digital broadcasting is activated, broadcast signals according to various broadcasting systems are transmitted and received. Among these broadcasting systems, for example, there are broadcasting systems using the same modulation scheme in the physical layer and using different modulation schemes or coding schemes in the upper layer. For example, a mobile broadcasting signal uses the same physical layer modulation scheme as a terrestrial broadcast signal, but additionally carries out channel coding to transmit a mobile broadcast signal together with a terrestrial broadcast signal. If these two broadcast systems have similar signaling information, the broadcast receiver may use both the signaling information to identify all of the broadcast signals by both broadcast systems. However, even though the broadcast receiver can identify both of the two broadcast signals, the mobile broadcast signal can be expressed by having an additional decoding module.

That is, even if a broadcast receiver that receives only a terrestrial broadcast signal identifies a mobile broadcast signal using signaling information, the broadcast receiver can not decode the mobile broadcast signal. Thus, even if the user selects an identified mobile broadcast service, the broadcast receiver can not provide the selected mobile broadcast service to the user. Accordingly, in such a case, there arises a problem that the broadcast receiver can identify the broadcast service that the broadcast receiver can not process and confuse the user.

It is an object of the present invention to provide a broadcast signal receiving method and a broadcast signal receiving apparatus capable of easily identifying a broadcast signal according to a broadcasting system using the same signaling information through the same modulation scheme in a physical layer.

It is another object of the present invention to provide a broadcast signal receiving method and a broadcast signal receiving apparatus capable of easily identifying a mobile broadcast signal and a fixed receive broadcast signal.

It is still another object of the present invention to provide a broadcast signal receiving method and a broadcast signal receiving apparatus capable of easily identifying a DVB-H broadcast signal and a DVB-T broadcast signal.

One embodiment of the present invention is a method for receiving a broadcast signal according to a digital video broadcasting (DVB) broadcasting system, demodulating the received broadcast signal, and transmitting the demodulated broadcast signal with a transmission parameter signaling (TPS) Obtaining identification information capable of identifying at least one of a DVB-H broadcast signal and a DVB-T broadcast signal from the DVB-H broadcast signal and the DVB-T broadcast signal, And a broadcast signal receiving method and apparatus therefor.

The TPS information may have a size of 31 bits when the broadcast signal is a DVB-T signal and 33 bits when the broadcast signal is a DVB-H signal.

According to another embodiment of the present invention, there is provided a digital video broadcasting (DVB) broadcasting system, comprising: receiving a broadcasting signal according to a digital video broadcasting (DVB) broadcasting system; demodulating the received broadcasting signal; demultiplexing the demodulated broadcasting signal to describe a service stream and a broadcasting signal; And outputting service information; decoding the service information to obtain identification information capable of identifying any one of a DVB-H broadcast signal and a DVB-T broadcast signal; And a DVB-T broadcast signal, and a method for receiving the same.

Wherein the identification information is a time_slice_fec_identifier_descriptor () of a network information table (NIT), and when the time_slice_fec_identifier_descriptor () is included in the NIT, the service is identified as a DVB-H service and the time_slice_fec_identifier_descriptor The service can be identified as a DVB-T service.

Wherein the identification information is a service type included in a service description table (SDT), identifies the service as a DVB-H service when the service type is mobile broadcasting, and if the service type is a general digital broadcast, -T can be identified by service.

The identification information may be a descriptor included in one of NIT and SDT, and the descriptor may be a descriptor including information directly describing that the service according to the broadcast signal is a DVB-T service or a DVB-H service.

The identification information is a descriptor included in the SDT. If the descriptor does not include a service name, the identification information is identified as a DVB-H service. If the descriptor includes a service name, the identification information can be identified as a DVB-T service.

The identification information is a service_descriptor included in the SDT. If the service_descriptor is not included in the SDT, it is identified as a DVB-H service. If the service_descriptor is included in the SDT, it can be identified as a DVB-H service.

The identification information is SDT, and if the SDT is not included in the service information, it is identified as a DVB-H service, and when the SDT is included in the service information, it can be identified as a DVB-T service.

The identification information may be a program map table (PMT), and may be identified as a DVB-T service if the PMT includes any one of an audio PID, a video PID, and a PCR PID, and otherwise a DVB-T service.

The present invention can identify the services of DVB-T and DVB-H in various layers. Also, the present invention can accurately distinguish channels for each service in the DVB-T / H integrated receiver.

According to the present invention, it is possible to easily identify a broadcast signal according to a broadcasting system that uses the same signaling information through the same modulation scheme in the physical layer.

According to the present invention, there is provided a broadcast signal receiving method and a broadcast signal receiving apparatus capable of easily identifying a mobile broadcast signal and a fixed receive broadcast signal and easily identifying a DVB-H broadcast signal and a DVB-T broadcast signal .

An embodiment in which a broadcast signal according to a plurality of broadcasting systems can be easily identified will be described below. In order to facilitate description of the present invention, DVB-T broadcast signals and DVB-H broadcast signals will be described as an example. Broadcast signals according to a DVB-T2 system and a next generation hand-held (NGH) Can be applied. These broadcast systems use the OFDM modulation scheme in the physical layer and the SDT defined in the DVB-SI as signaling information for describing the service. A receiver that receives a DVB-T broadcast signal may also receive a DVB-SI that describes a DVB-H broadcast signal. Accordingly, when the broadcast receiver generates the service list using the SDT, it provides the service list of the DVB-H broadcast signal and the service list of the DVB-T broadcast signal to the user without discrimination. Since the DVB-T broadcast signal is processed by a proprietary technique such as time-slicing, forward error correction (FEC), and an IP-based stream processing method, the DVB- The signal can not be decoded. Therefore, even if a DVB-H broadcast channel is identified and displayed in the DVB-T receiver, the user can not view any A / V through the DVB-H broadcast channel.

FIG. 1 is a diagram showing an example of a service program list or a service guide showing broadcast channels, for example.

The DVB-T broadcast receiver can decode the DVB-SI signaling information to obtain a service list of broadcast signals. It is assumed that channel 4 has a channel name of BBC, channel 6 has ITV, channel 9 has CANAL +, channel 103 has ESG, channel 104 has CBMS, and channel 105 has no channel name.

In FIG. 1, channels 4, 6, and 9 are services identified as SDT of a DVB-T broadcast signal and can decode A / V from the channels. However, the channels 103, 104, and 105 are services identified as SDT, but are channels that can not be decoded because they are DVB-H channels. However, the broadcast receiver can identify both the DVB-H channel number and the DVB-T channel number and provide the channel list including the channel number to the user. Therefore, even if the user selects channels 103, 104, and 105 through the DVB-T broadcast receiver, no video or audio signal can be obtained.

Hereinafter, a specific embodiment in which a broadcast receiver can identify a DVB-T broadcast signal and a DVB-H broadcast signal will be described.

First, a broadcast receiver can use a transmission parameter of a received signal to identify a DVB-T broadcast signal and a DVB-H broadcast signal. For example, when a DVB-T broadcast receiver receives a broadcast signal, it locks the signal at a specific frequency of the broadcast signal. If there is a broadcast signal transmitted at the frequency, the broadcast receiver can obtain TPS (transmission parameter signaling) information from the tuner-tuned broadcast signal. The TPS information is transmission parameter information that is transmitted to a carrier at a specific position among OFDM symbol positions of a broadcast signal.

FIG. 2 and FIG. 3 show positions of carriers for transmitting transmission parameter signaling (TPS) information in OFDM symbols of DVB-T (2K, 8K mode) and DVB-H (4K mode) signals, respectively.

TPS information is transmitted to the OFDM symbol, and the size of each TPS block corresponding to one OFDM frame is 68 bits. The 68 bits include a start bit of 1 bit, a synchronization bit of 16 bits, an information bit of 37 bits, and 14 redundancy bits. 37 of the information bits, 31 bits are used for the DVB-T signal, and the remaining 6 bits are set to 0 (set). On the other hand, the DVB-H signal uses 33 bits of 37 information bits and the remaining 4 bits are set to zero. The DVB-H signal may signal the DVB-H signal to two information bits rather than the DVB-T signal. Thus, the TPS size of DVB-T is different from the TPS size of DVB-H.

When the broadcast receiver obtains the DVB-H / T broadcast signal from a specific frequency, the transmission parameter size (TPS information size) can be obtained. For example, the manager of the broadcast receiver can identify the DVB-H channel or the DVB-T channel by analyzing the TPS information size. The channel manager can classify the DVB-H channel or the DVB-T channel identified, and generate a channel list with a broadcast channel that can provide a service. This will be described later.

The disclosed method may be a method of identifying two broadcast signals when a DVB-T channel and a DVB-H channel are transmitted on separate channels. However, if the DVB-T broadcast signal and the DVB-H broadcast signal are transmitted through one channel, an additional confirmation process may be required.

Hereinafter, a broadcast signal is identified using signaling information of a broadcast signal. The signaling information of the DVB system is called PSI / SI, which is referred to as service information for convenience.

4 shows a network information table (NIT) among PSI / SI. The NIT includes TS information transmitted to the network. Each field of the NIT will be described as follows.

The table_id field indicates an identifier capable of identifying the NIT. The section_syntax_indicator field can be set to 1, which can have a long-form format in MPEG. The reserved_future_use field and the reserved field are unspecified areas, for example, 1 and 11, respectively. The section_length field indicates the length of the section.

The network_id field indicates an identifier that identifies a delivery system for transmitting a service stream, and may include identification information of a broadcast transmitter, for example.

The version_number field indicates the version number of the table section. The current_next_indicator field indicates whether the information to be transmitted is applied to the current section or to the next section.

The section_nmber field indicates the serial number of the table section.

The last_section_number field indicates the number of the last table section.

The reserved_future_use field indicates the unspecified area, and the network_descriptors_length indicates the length of the network descriptor loop A included below. This descriptor loop can contain information that can describe all networks.

The transport_stream_loop_length field after the reserved_future_use field, which is an unspecified area, indicates the length of the following transport stream loop.

In this figure, TS loop represents a loop including information for describing a transport stream. The transport_stream_id field indicates a transport stream identifier for identifying a transport stream by the current delivery system with a transport stream by another delivery system.

The original_network_id indicates the network identifier of the original delivery system. A descriptor B for describing the corresponding transport stream in accordance with the transport stream identifier, and a field for indicating the length of the descriptor are respectively included after the reserved_future_use field which is an unspecified area.

In this example, the transport stream descriptor B may contain information describing the TS.

The NIT may include a network descriptor A describing information on the entire network, and a transport stream descriptor B describing information on the TS of each network. A descriptor capable of identifying a DVB-T broadcast signal and a DVB-H broadcast signal at two descriptor positions may be included.

Figure 5 illustrates descriptors that may be included in the NIT.

For example, the NIT may include a cell_list_descriptor () having a descriptor tag value of 0x6c, a cell_frequency_link_descriptor () having a descriptor tag value of 0x6D, and a time_slice_fec_identifier_descriptor () having a descriptor tag value of 0x77. Of these, cell_list_descriptor () and cell_frequency_link_descriptor () include information related to handover and roaming.

time_slice_fec_identifier_descriptor () may include time slicing parameters such as FEC scheme used for time slicing. Since time slicing is used only in DVB-H signals, it can be used to identify DVB-T and DVB-H.

For example, when the time_slice_fec_identifier_descriptor () is included in the network descriptor A in FIG. 4, a service transmitted to the network (i.e., all TSs transmitted to the network) transmits the DVB- H service.

When the time_slice_fec_identifier_descriptor () is included in the transport descriptor (B) of FIG. 4, the corresponding TS can be identified as a stream transmitting the DVB-H service.

After the broadcast signal of the specific channel is selected in the tuner, it is demodulated in the demodulation section. Of the demodulated broadcast signals, the service information is transmitted to the service information decoding unit through the demultiplexing unit. The service information decoding unit can identify whether time_slice_fec_identifier_descriptor () is included from the NIT in the service information. Therefore, the service information decoding unit can transmit to the channel manager whether or not the time_slice_fec_identifier_descriptor () exists. The channel manager can manage the DVB-H or DVB-T channel list according to whether there is a time_slice_fec_identifier_descriptor ().

6 is a diagram illustrating a service description table (SDT) among PSI / SI. The SDT contains information describing the service, and each field is described as follows.

The table_id field indicates an identifier capable of identifying the SDT. The section_syntax_indicator field can be set to 1, which can have a long-form format in MPEG. The reserved_future_use field and the reserved field are unspecified areas, for example, 1 and 11, respectively. The section_length field indicates the length of the section.

The Transport_stream_id field indicates a transport stream identifier, and the reserved field indicates an unconfirmed area of 2 bits.

The version_number field indicates the version number of the table section. The current_next_indicator field indicates whether the information to be transmitted is applied to the current section or to the next section.

The section_nmber field indicates the serial number of the table section.

The last_section_number field indicates the number of the last table section. The original_network_id field originally represents the network identifier of the delivery system. The reserved_future_use field indicates an unspecified area.

The Service_id indicates an identifier of a service to be transmitted to the TS. After the 6-bit unspecified area field (reserved_future_use), EIT_schedule_flag is set to 1 if the identified TS has EIT schedule information for the service, and to 0 otherwise.

The EIT_present_following_flag field is set to 1 if the identified TS has current and next schedule information for the service, and to 0 otherwise.

The Running_status field indicates the status of the described service. It is undefined, not running, starts in a few seconds, paused, running, etc. Can be set.

The Free_CA_mode field indicates whether all the component streams of the describing service are scrambled.

The service loop includes a field indicating a length of a service loop (descriptor_loop_length) and a service loop so that each service can be described concretely.

The service loop includes a descriptor that describes each service in detail, and a service loop may include a descriptor that can describe additional information about the identified service.

FIG. 7 illustrates the service_descriptor () included in the SDT. service_descriptor () can describe each service.

Descriptor_tag indicates the identifier of the service_descriptor (), and descriptor_length indicates the length of the descriptor.

The Service_type indicates the type of service to be described, and the concrete service type is illustrated on the right side of FIG. For example, if the Service_type is 0x01, it indicates digital television service, and if 0x02 indicates digital radio service. 0x03 may represent a teletast service.

Information on the length of the name of the service provider (service_provider_name_legnth), the name of the service provider, the service name (service_name_legnth) and its length is transmitted in service_descriptor ().

Conventionally, Service_type does not have a service type value for mobile broadcasting. However, since mobile broadcasting transmits a QVGA image lower than SD, it is preferable to have a separate service_type.

In this embodiment, if the Service_type is 0x07, it indicates the service type of the mobile broadcasting, and it may be the service type indicating the DVBH service.

The broadcast receiver can decode the SDT among the PSI / SI of the demultiplexed broadcast stream. The service information decoding unit of the broadcast receiver can decode the service type value for the mobile broadcasting with the service_type of the service_descriptor () in the SDT and deliver it to the manager.

The manager can identify whether the service is a DVB-T service (service type = 0x01 (SD), 0x12 (HD)) or a DVB-H service (service type = 0x07 according to this embodiment). Details will be described later.

As another possible example, the SDT may include a descriptor (a) that identifies the DVB-H service. As described above, the service loop of the SDT may include a descriptor () describing additional information about the service.

FIG. 8 illustrates a descriptor capable of identifying DVB-H. Here, it is referred to as H_service_descriptor () for convenience. H_service_descriptor () may include descriptor_tag, which is an identifier of the descriptor, and descriptor_length, which is the length of the descriptor. The H_service_descriptor () may include a service attribute, which indicates whether the service is a DVB-H service.

The service information decoding unit of the broadcast receiver decodes the SDT among the PSI / SI of the demultiplexed broadcast stream and decodes the service descriptor () in the SDT. And transmits the information to the manager.

At this time, the manager can identify the DVB-H signal and the DVB-T signal when the H_service_descriptor () is included in the SDT or the service attribute indicates the DVB-H service in the H_service_descriptor ().

In another embodiment, the service name included in the service_descriptor () of the SDT may be identified as a DVB-T service if the service name is included, or a DVB-H service if not included. As another example, if the service_descriptor () is not included in the SDT or is optional, it is identified as a DVB-H service. As another example, if the SDT is not transmitted in the broadcast signal, it may be identified as a DVB-H service.

Or the network descriptor of the NIT or the H_service_descriptor () exemplified in the TS descriptor, it is possible to identify that the network or the TS is delivering the DVB-H service.

As another example, a DVB-T service and a DVB-H service can be identified by a packet ID (PID) of a broadcast signal. DVB-H service does not use audio PID, video PID, and PCR PID because it transmits audio and video through MPP (Multiprotocol Encapsulation) during data broadcasting. Accordingly, the broadcast receiver can identify DVB-H and DVB-T signals using audio PID, video PID, and PCR PID.

9 is a diagram illustrating a program map table (PMT). The PMT represents a mapping relationship between a program number and an elementary stream. The PMT is described as follows.

The table_id field indicates an identifier capable of identifying the PMT. The section_syntax_indicator field can be set to 1, which can have a long-form format in MPEG. After the field where 0 is set, a 2-bit undefined area can be set.

The Section_length field indicates the length of the section. The Program_number field is a program number corresponding to the program number of the PAT.

After the 2-bit reserved field, the version_number field indicates the version number of the table section. The current_next_indicator field indicates whether or not the following information is applied to the current section.

The section_nmber field indicates the serial number of the table section, and the last_section_number field indicates the number of the last section

The PCR_PID field indicates the PID of the TS packet carrying the PCR of the program. Program_info_length indicates the length of the following program information. A descriptor describing the program is included.

The stream_type includes information identifying the type of the elementary stream, and the elementary_PID includes PID information of the TS packet transmitting the elementary stream.

ES_info_legnth indicates the length of information of the following ES. The descriptor describing the ES is included.

If the broadcast receiver includes any one of an audio stream PID, a video stream PID, and a PCR type PID among the PMTs, the broadcast receiver identifies the corresponding stream as a DVB-T broadcast signal, and if not, as a DVB-H broadcast signal .

 This embodiment can be a method of identifying two broadcast signals when the service information of the NIT or the SDT does not include the identification information of the DVB-H signal and the DVB-T signal.

The broadcast receiver can decode the PMT among the PSI / SI of the demultiplexed broadcast stream. The service information decoding unit of the broadcast receiver notifies the manager of any one of the audio stream PID, the video stream PID, and the PID for transmitting the PCR type to the PMT. The manager determines the broadcast signal of the received channel as a DVB-T broadcast signal. If the PID for transmitting the video stream, the audio stream and the PCR type is not included in the PMT from the PMT, the manager identifies the broadcast channel as a DVB-H broadcast channel.

For example, the DVB-T service and the DVB-H service can be identified by the information of the descriptor (a) included in the second descriptor loop of the PMT. If the descriptor includes PID information of audio, video, or PCR, it can be determined that a DVB-T service is provided. If this descriptor includes a data broadcast identifier for the DSM-CC OAD / OTA, it can be determined that the OTA / OAD service is provided. If this descriptor includes a data broadcast identifier for the MHEG / MHP object / carousel, it can be determined that the MHEG / MHP data service is delivered through the received broadcast signal. If a CAS identifier is present, a CAS scrambled service may be present.

If the descriptor includes the DSMCC stream identifier for the MPE type, it can be determined that the DVB-H service is delivered through the broadcast signal.

Accordingly, the service information decoding unit can decode information capable of identifying the DVB-H service and the DVB-T service, and can transmit the identification information to the manager.

The manager of the manager can store the identified DVB-H or DVB-T channel in each channel list and display the service of the DVB-H or DVB-T channel identified according to the user control.

10 is a flowchart illustrating a broadcast signal receiving method according to the present invention.

Demodulates the received broadcast signal, and confirms whether the identification information of the DVB-T and DVB-H signals is included in the transmission parameter information of the demodulated broadcast signal (S110).

If the identification information for the DVB-T and DVB-H signals is included (S110 yes), the identification information is obtained and it is discriminated from the identification information whether the received signal is a DVB-T signal and a DVB-H signal (S115).

Then, the broadcast service is expressed by decoding the received broadcast signal according to the identification information (S150).

If the received broadcast signal does not include the identification information for the DVB-T and DVB-H signals (S110 no), the demultiplexer demultiplexes the service information from the demodulated broadcast signal (S120).

The table section including the demultiplexed service information is decoded (S130).

Identification information is obtained from any of the DVB-H and DVB-T services from the decoded table section, and identifies whether the received signal is a DVB-T and a DVB-H signal according to the identification information (S140).

For example, the NIT may include a descriptor capable of identifying a DVB-H service and a DVB-T service. For example, time_slice_fec_identifier_descriptor () may be included in a network loop or TS loop. The network or TS containing this descriptor provides the DVB-H service, and the other network or TS can be identified as providing the DVB-T service. Or the NIT may include a descriptor including information identifying the DVB-H service and the DVB-T service.

As another example, the SDT may include a descriptor capable of identifying a DVB-H service and a DVB-T service. The SDT may include a service_descriptor, which may include stream type information of the stream describing it. This stream type may be a stream type representing a mobile service, in which case it can be identified as a DVB-H service.

Or a DVB-H service if there is no service_descriptor in the SDT, and a DVB-T service if there is a service_descriptor in the SDT.

Alternatively, two services can be identified by their service names in the service_descriptor. For example, in the service_descriptor, the DVB-H service does not include the service name, so it can identify the DVB-T service when there is a service name and the DVB-H service when there is no service name.

Or the SDT itself is not included in the DVB-H broadcast signal, so that the two services can be identified.

As another example, a NIT or SDT may include a descriptor describing it as a DVB-H service to identify the two services. As an example of this, a descriptor called H_descriptor () is illustrated.

As another example, a service in which one of audio, video and PCR PID is described in the PMT can be identified as a DVB-T service, and a service not otherwise described can be identified as a DVB-H service.

11 shows an embodiment of a broadcasting signal receiving apparatus according to the present invention.

The illustrated signal receiving apparatus includes a tuner 110, a demodulator 120, a demultiplexer 130, a service information buffer 135, a stream buffer 137, a service information decoder 140, 150, a manager 160, an interface unit 165, a data processing unit 170, a DVB-H processor 175, a decoding unit 180, and a post-processing unit 190.

The tuner 110, demodulator 120, and demultiplexer 130 may be referred to as receivers. The data processing unit 170, the DVB-H processor 175, the decoding unit 180, and the post-processing unit 190 may be referred to as a display unit.

The tuner 110 can tune to a specific RF channel signal among the received signals. The demodulator 120 demodulates and outputs a specific RF signal, and the demultiplexer 130 demultiplexes the demodulated signal to demultiplex the service information and the audio / video stream.

The demodulator 120 may transmit physical layer information such as transmission parameters to the manager 160. For example, the size of the TPS information of the DVB signal may be information identifying the DVB-T signal and the DVB-H signal And the demodulation unit 120 may transmit the size of the TPS information to the manager 160.

The service information buffer 135 may temporarily store the service information output by the demultiplexing unit 120.

The service information decoding unit 140 reads and decodes the service information stored in the service information buffer 135 and obtains information identifying the DVB-T stream and the DVB-H stream from the decoded service information. For example, the service information decoding unit 140 can decode information capable of identifying a DVB-H stream and a DVB-T stream from service information such as NIT, SDT, and PMT.

The service information decoding unit 140 stores the decoded service information in the service information storage unit 150 and outputs information identifying the two broadcast signals to the manager 160. [

The stream buffer 137 temporarily stores a stream demultiplexed by the demultiplexer 130.

The data processing unit 170 may process the stream stored in the stream buffer 137, and may include a PID filter, a data handler, and a middleware engine.

The PID filter of the data processing unit 170 filters the transport packet of the stream stored in the stream buffer 137. The PID filter of the data processing unit 170 outputs the data broadcasting packet to the data handler and the A / V packet to the decoding unit 180. [ In this case, the data processing unit 170 can refer to the service information decoded by the service information decoding unit 140. The data processing unit 170 outputs the DVB-H service packet to the DVB-H processor 175 by referring to the service information and the transmission parameter, and the DVB-T signal bypasses the DVB-H processor 175, 180).

The data handler processes the data for broadcasting and transmits the data to the middleware engine. The middleware engine provides a driving environment in which the application can run by driving the middleware to provide data broadcasting using data output by the data handler. The manager 160 may receive a source for data broadcasting from the middleware engine and may start an application for implementing data broadcasting.

The DVB-H processor 175 receives a control signal according to the identification information of the DVB-T and DVB-H streams from the manager 160, and can decode the DVB-H stream among the broadcast signals according to the control signal. The DVB-H processor 175 receives a control signal indicating whether the input stream is a DVB-H stream from the manager 160, and can decode the DVB-H stream according to the control signal. Specific identification information for DVB-H and DVB-T signals will be provided later.

When the input signal is the DVB-H signal, the DVB-H processor 175 can parse the packet including the A / V signal using the MPE parser. The DVB-H processor 175 performs UDP and IP decapsulation, and can output the A / V data included in the IP packet and the UDP packet.

The user interface 165 may receive the user control signal, display it on the OSD, or output it to the manager 160.

The decryption unit 180 can decrypt the A / V data identified by the data processing unit 170, respectively.

The post-processing unit 190 may post-process the decoded A / V data and output it to the display or audio output unit.

The manager 160 may include a channel manager for controlling a channel and a service manager for controlling service provision.

First, the service manager drives an application of a broadcast receiver and receives data necessary for driving an application from the middleware engine. The service manager may receive an user control signal from the user interface and may launch an application capable of providing a corresponding service. The channel manager may generate a channel map and the received signal may generate and manage at least one of a DVB-H channel list and a DVB-T channel list.

The manager 160 can obtain the identification information that can identify the DVB-H channel or the DVB-T channel from the demodulation unit 120 or the service information decoding unit 140. [

 For example, the manager 160 may obtain the TPS information size from the demodulator 120 and identify the DVB-H channel or the DVB-T channel. The manager 160 can identify two services with a DVB-T service when the TPS information size is 31 bits and a DVB-H service when the TPS information size is 33 bits. The channel manager may generate and store the identified DVB-H channel or DVB-T channel as a service list, respectively.

Alternatively, when the service information decoding unit 140 decodes the time_slice_fec_identifier_descriptor () from the NIT, the manager 160 receives the decoded information and uses the information to identify the service as a DVB-H service. The channel manager may then generate a DVB-H or DVB-T service list for each channel.

Alternatively, the manager 160 can identify the DVB-T service and the DVB-H service from the SDT decoded by the service information decoding unit 140. The manager 160 may receive the service_type value in the service_descriptor () of the SDT from the service information decoding unit 140. The manager 160 then identifies the mobile broadcast service from the service_type decoded from the SDT and identifies the DVB-H signal accordingly to generate and store a channel list for the mobile broadcast.

For example, the manager 160 determines whether the corresponding service is a DVB-T service (service type = 0x01 (SD), 0x12 (HD)) or a DVB-H service (service type = 0x07 in the embodiment) Can be identified.

Alternatively, the manager 160 may identify the DVB-H / T service from the service_descriptor of the SDT or the service name in the service_descriptor from the service information decoding unit 140. When the service information decoding unit 140 decodes the service_name from the service_descriptor, the manager 160 identifies the service as a DVB-T service.

If the service information decoding unit 140 can not decode the service_descriptor or decode the service_name from the service_descriptor, the manager 160 can classify the service as a DVB-H service.

As another example, the manager 160 can identify the DVB-H signal and the DVB-T signal when the service information decoding unit 140 decodes the H_service_descriptor () exemplified by the NIT or the SDT. The manager 160 can distinguish the DVB-H service if the HITservice_descriptor () is included in the NIT or the SDT, and the DVB-T service if not.

When the service information decoding unit 140 parses any one of the audio stream PID, the video stream PID and the PCR PID from the PMT, the manager 160 converts the channel into a DVB-T service, Channel service can be distinguished.

1 is a diagram showing an example of a service program list or a service guide showing a broadcast channel

2 and 3 are diagrams showing positions of carriers for transmitting transmission parameter signaling (TPS) information in OFDM symbols of DVB-T (2K, 8K mode) and DVB-H (4K mode)

4 is a diagram showing a network information table (NIT) among PSI / SI

5 is a diagram illustrating a descriptor that may be included in an NIT;

6 is a diagram illustrating a service description table (SDT) of PSI / SI

FIG. 7 is a diagram illustrating service_descriptor () included in SDT

8 is a diagram illustrating a descriptor capable of identifying DVB-H

9 is a diagram illustrating a program map table (PMT)

10 is a flowchart illustrating a method of receiving a broadcast signal according to the present invention.

11 is a diagram illustrating an embodiment of a broadcast signal receiving apparatus according to the present invention.

Claims (22)

Receiving a broadcasting signal according to a broadcasting system; Demodulating the received broadcast signal and obtaining identification information for identifying at least one of a mobile broadcast signal and a terrestrial broadcast signal from transmission parameter information of the demodulated broadcast signal; And Displaying one of the mobile broadcast signal and the terrestrial broadcast signal using the identification information; Lt; / RTI > Wherein the identification information is service type information, And identifies the service as a mobile service when the service type indicated by the service type information is mobile broadcasting and identifies the service as a terrestrial service when the service type indicated by the service type information is general digital broadcast. Receiving method. The method according to claim 1, Wherein the identification information is a size of the transmission parameter information of the broadcasting system. The method according to claim 1, Wherein the transmission parameter information has a size of 31 bits when the broadcast signal is a terrestrial signal and 33 bits when the broadcast signal is a mobile signal. A tuner for tuning to a broadcast channel for transmitting a broadcast signal according to a broadcast system; A demodulator for demodulating the broadcast signal output from the tuner and obtaining identification information capable of identifying at least one of a mobile broadcast signal and a terrestrial broadcast signal from transmission parameter information of the demodulated broadcast signal; A manager for generating a service list of the broadcast signal according to the identification information obtained by the demodulator; And A display unit for displaying one of a mobile broadcast signal and a terrestrial broadcast signal according to the service list; Lt; / RTI > Wherein the identification information is service type information, And identifies the service as a mobile service when the service type indicated by the service type information is mobile broadcasting and identifies the service as a terrestrial service when the service type indicated by the service type information is general digital broadcast. Receiving device. 5. The method of claim 4, Wherein the identification information is the transmission parameter information size of the broadcasting system. 5. The method of claim 4, The transmission parameter information has a size of 31 bits when the broadcast signal is a terrestrial signal and 33 bits when the broadcast signal is a mobile signal, Wherein the manager identifies the broadcast signal as a mobile broadcast signal when the size of the transmission parameter output by the demodulator is 33 bits. Receiving a broadcasting signal according to a broadcasting system; Demodulating the received broadcast signal; Demultiplexing the demodulated broadcast signal to output a service stream and service information describing the broadcast signal; Decoding the service information to obtain identification information capable of identifying any one of a mobile broadcast signal and a terrestrial broadcast signal; And Identifying and displaying any one of the mobile broadcast signal and the terrestrial broadcast signal using the identification information; Lt; / RTI > The identification information is service type information included in service description information describing a broadcast service, And identifies the service as a mobile service when the service type indicated by the service type information is mobile broadcasting and identifies the service as a terrestrial service when the service type indicated by the service type information is general digital broadcast. Receiving method. 8. The method of claim 7, Wherein, The time_slice_fec_identifier_descriptor () of the network information table (NIT) Identifies the service as a mobile service when the time_slice_fec_identifier_descriptor () is included in the NIT, And identifying the service as a terrestrial service when the time_slice_fec_identifier_descriptor () is not included in the NIT. 8. The method of claim 7, Wherein the identification information is a descriptor included in one of the NIT and the service description information, and the descriptor is a descriptor including information directly describing that the service according to the broadcast signal is a terrestrial service or a mobile service. 8. The method of claim 7, Wherein the identification information is a descriptor included in the service description information, Identifying a mobile service if the descriptor does not include a service name; and identifying the terrestrial service if the descriptor includes a service name. 8. The method of claim 7, The identification information is a service_descriptor included in the service description information, Identifies the service descriptor as a mobile service when the service descriptor is not included in the service description information, and identifies the service descriptor as a terrestrial service when the service descriptor is included in the service description information. 8. The method of claim 7, The identification information is service description information, And identifies the service description information as a mobile service when the service description information is not included in the service information, and identifies the service description information as a terrestrial service when the service description information is included in the service information. 8. The method of claim 7, Wherein the identification information is a program map table (PMT) If the PMT includes any one of an audio PID, a video PID, and a PCR PID, identifies the terrestrial service as a mobile service. A receiving unit for receiving a broadcasting signal according to a broadcasting system and demultiplexing the received broadcasting signal into a broadcasting stream; A service information decoding unit for decoding service information among the demultiplexed broadcast streams and obtaining identification information for identifying at least one of a mobile broadcast signal and a terrestrial broadcast signal; A manager for generating and storing a channel list according to the identification information obtained by the service information decoding unit; And A display unit for displaying one of a mobile broadcast service and a terrestrial broadcast service according to the identification information; Lt; / RTI > The identification information is service type information included in service description information describing a broadcast service, And identifies the service as a mobile service when the service type indicated by the service type information is mobile broadcasting and identifies the service as a terrestrial service when the service type indicated by the service type information is general digital broadcast. Receiving device. 15. The method of claim 14, Wherein, The time_slice_fec_identifier_descriptor () of the network information table (NIT) Wherein the manager identifies the service as a mobile service when the service information decoding unit decodes the time_slice_fec_identifier_descriptor () from the NIT. 15. The method of claim 14, Wherein the identification information is a descriptor contained in either the NIT or the service description information, When the service information decoding unit decodes the descriptor from any one of the NIT and the service description information, the manager identifies the service according to the broadcast stream as a terrestrial service or a mobile service according to the information directly described in the descriptor Signal receiving device. 15. The method of claim 14, Wherein the identification information is a descriptor included in the service description information, Wherein, when the service information decoding unit decodes a service name from the descriptor, the manager identifies a service according to the broadcast stream as a mobile service. 15. The method of claim 14, The identification information is a service_descriptor included in the service description information, Wherein, when the service information decoding unit decodes the service_descriptor from the service description information, the manager identifies a service according to the broadcast stream as a mobile service. 15. The method of claim 14, The identification information is service description information, Wherein when the service information decoding unit decodes the service description information, the manager identifies a service according to the broadcast stream as a terrestrial service. 15. The method of claim 14, Wherein the identification information is a program map table (PMT) Wherein the manager identifies a service according to the broadcast stream as a terrestrial service when the service information decoding unit decodes audio PID, video PID, and PCR PID from the PMT. delete delete

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