KR100822150B1 - Integration demultiplexing apparatus for digital multimedia broadcasting - Google Patents

Abstract

The present invention relates to an integrated demultiplexing apparatus for digital multimedia broadcasting, and implements an integrated demultiplexing apparatus for demultiplexing a multimedia broadcasting signal of the DVB-H broadcasting standard and a multimedia broadcasting signal of the TDMB broadcasting standard. When developing a digital multimedia broadcasting receiver that can simultaneously use TDMB, there is an advantage of preventing the complexity of the circuit design caused by applying a demultiplexer having a different configuration and suppressing the increase in unit cost.

DVB-H, TDMB, Demultiplex

Description

Integrated demultiplexer for digital multimedia broadcasting {INTEGRATION DEMULTIPLEXING APPARATUS FOR DIGITAL MULTIMEDIA BROADCASTING}

1 is a block diagram of an integrated demultiplexer for digital multimedia broadcasting according to the present invention;

FIG. 2 is a detailed block diagram of the integrated header processor illustrated in FIG. 1;

3 is a detailed block diagram of a packet length extractor and a time stamp extractor shown in FIG.

FIG. 4 is a detailed block diagram illustrating the time slicing information extracting unit and the IP information extracting unit shown in FIG. 2.

<Description of the symbols for the main parts of the drawings>

100: TS demultiplexer 200: PSI / SI decoder

300: integrated header processing unit 310: packet length extraction unit

320: time slicing information extraction unit 330: time stamp information extraction unit

340: IP information extraction unit 350: header detection unit

360: buffer 400: service and decoding information processing unit

The present invention relates to an integrated demultiplexing apparatus for digital multimedia broadcasting, and to demultiplexing a multimedia broadcasting signal of DVB-H (Digital Video Broadcasting-Handheld) broadcasting standard and a multimedia broadcasting signal of Terrestrial Digital Multimedia Broadcasting (TDMB) broadcasting standard. An integrated demultiplexing device for performing

TDMB is based on the European DAB standard Eureka-147, which is physically the same as DAB, except that it has video in it. The video is compressed with H.264, and the voice is compressed with Bit Sliced Arithmetic Coding (BSAC). The frequency band of TDMB uses part of VHF and UHF in Korea, and L-band will be used in Europe (Germany).

DVB-H is based on DVB-T, a digital TV broadcast currently used in Europe. In consideration of portability, DVB-H is improved to operate at low power instead of small screen size. DVB-H uses a time slice method to implement low power, and processes information by spacing it in time. In other words, it uses power only to receive information and saves power by turning off part of the circuit until the next information is received. The video is compressed with H.264, and the audio is compressed with AAC + (High Efficiency Advanced Audio Coding). The frequency band of DVB-H is UHF in Europe and 1.6 GHz in the United States.

Meanwhile, DVB-H and TDMB will be serviced together in Europe, and this area is expected to increase further. Therefore, development of an integrated digital multimedia broadcasting receiver capable of receiving both DVB-H broadcasting signals and TDMB broadcasting signals is required, and integrated digital multimedia broadcasting reception is provided by mounting modules constituting the DVB-H receiving apparatus and the TDMB receiving apparatus, respectively. In designing and manufacturing the device, the size of the receiving device is increased and the cost is increased.

Accordingly, a problem for developing an integrated digital multimedia broadcasting receiver for selecting and receiving a multimedia broadcasting signal of the DVB-H standard and a multimedia broadcasting signal of the TDMB broadcasting standard has been highlighted.

An object of the present invention is to provide an integrated demultiplexing apparatus for demultiplexing a multimedia broadcasting signal of the DVB-H broadcasting standard and a multimedia broadcasting signal of the TDMB broadcasting standard. There is this.

An integrated demultiplexer for digital multimedia broadcasting according to the present invention for realizing the above object is an integrated demultiplexer for demultiplexing a multimedia broadcasting signal of the DVB-H broadcasting standard and a multimedia broadcasting signal of the TDMB broadcasting standard. The packet is divided and received according to the sync byte of a packet constituting a transport stream (TS) obtained by receiving the multimedia broadcast signal of the DVB-H broadcast standard or the multimedia broadcast signal of the TDMB broadcast standard. Program Specific Information / Service Information) and a TS demultiplexer for extracting section data, a video packet stream, an audio packet stream, and an auxiliary data packet stream, and a broadcast currently received from the PSI / SI section data provided from the TS demultiplexer. An integrated PSI / SI decoder for extracting service configuration information, and the video An integrated header processor for extracting packet length information, time stamp information, time slicing information, and IP (Internet Protocol) information from headers of a packet stream, an audio packet stream, and an auxiliary data packet stream, and the service from the integrated PSI / SI decoder. The configuration information is provided to the TS demultiplexer to provide a PID (Packet IDentificaion) for extracting the video packet stream, the audio packet stream, and the auxiliary data packet stream, and the packet length information and time stamp information from the integrated header processor. And a service and decoding information processor configured to receive time slicing information and IP information to generate various control information for service and decoding.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of an integrated demultiplexer for digital multimedia broadcasting according to the present invention.

As described above, the integrated demultiplexer according to the present invention includes a TS demultiplexer 100, an integrated PSI / SI decoder 200, an integrated header processor 300, and a service and decoding information processor 400. .

The TS demultiplexer 100 receives the packet from the service and decoding information processor 400 while regularly dividing and receiving the packet according to a sync byte (0 × 47) of the packet constituting the transport stream (TS). The video packet stream, the audio packet stream, and the auxiliary data packet stream are extracted and provided to the integrated header processing unit 300 according to the PID (Packet IDentificaion) information (S1) to be stored in the video buffer, the audio buffer, and the auxiliary data buffer. It provides a PSI / SI (Program Specific Information / Service Information) section data to the integrated PSI / SI decoder (200).

The integrated PSI / SI decoder 200 includes program related table information (PSI) such as PAT and PMT, service information (SI) table such as NIT, BAT, INT and SDT, and object descriptor / binary format for scene (OD / BIFS). The service configuration information of the currently received broadcast is extracted by analyzing the stream and the like, and the service configuration information S2 analyzed in the PSI / SI section is provided to the service and decoding information processing unit 400.

The integrated header processing unit 300 extracts information for depacketizing each TS demultiplexed multimedia stream (video, audio, auxiliary data), and sync time information necessary for decoding. TDMB uses PES / SL blending when packetizing elementary streams, and MPE / IP / RTP blending in DVB-H. Although the structure of the packet header is different, the information extracted is common. That is, time stamp information for packet length and sync. However, DVB-H further extracts IP address information and time slicing information. Accordingly, the integrated header processor 300 extracts the packet length extractor 310, the time slicing information extractor 320, the time stamp information extractor 330, and the IP information corresponding to the four pieces of information as shown in FIG. 2. The part 340 is put into design. Four information extracting units 310, 320, 330, according to a broadcast selection signal for selecting any one of the DVB-H / TDMB broadcast selection signal, that is, the multimedia broadcast signal of the DVB-H broadcast standard and the multimedia broadcast signal of the TDMB broadcast standard. 340 extracts predetermined information from the given header information and transmits the data to the service and decoding information processing unit 400. The header detector 350 finds a TS packet in which a packetized elementary stream / synchronization layer (PES / SL) packet or a multi-protocol encapsulation (MPE) section starts among TS packets, and stores header information in the buffer 360. . The integrated header processor 300 provides packet length information, time stamp information, time slicing information, and IP information S5 to the service and decoding information processor 400, and stores the extracted video elementary stream in a video buffer. The audio elementary stream is stored in the audio buffer, and the auxiliary data elementary stream is stored in the auxiliary data buffer, respectively.

The service and decoding information processor 400 receives the service information S2 analyzed in the PSI / SI section from the integrated PSI / SI decoder 200 and receives packet length information, time stamp information, and time sliding from the integrated header processor 300. Information, IP information (S5) is provided to provide a variety of control information for service and decoding. In particular, the time stamp information S3 is provided to the AV decoder and the auxiliary data decoder, and the time slicing information S4 is provided to the power control unit.

Meanwhile, according to the TDMB demultiplexing according to the prior art, the OD / BIFS stream is processed through the SL header processing unit. However, the OD / BIFS stream has much less weight than the multimedia stream and is separately processed to be processed by the integrated header processing unit 300. Since a circuit is required, the integrated demultiplexer according to the present invention processes the integrated PSI / SI decoder 200.

Of course, the integrated header processor 300 may process the OD / BIFS stream used in the TDMB. In this case, it may be easy to extract the time stamp information provided from the SL packet of the OD / BIFS stream, but the TDMB location length information part should be changed so that the time stamp information extractor 330 can support additional information. In the case of TDMB-PES / SL, TDMB-OD / BIFS, and DVB-H, there are three bits.

FIG. 3 is a detailed block diagram illustrating the packet length extractor and the time stamp extractor shown in FIG. 2. The packet length extractor 310 and the time stamp extractor 330 may be designed to have the same structure as individual components or as shown in FIG. 3.

Since the position and bit length of the information in the header are different for each broadcast, the TDMB information storage unit 301 and the DVB-H information storage unit 302 for storing the information are separately provided, and the bit extractor ( 304 receives the information through the MUX 303 and extracts the packet length information or the time stamp information from the header stored in the buffer 360. The bit length of the information to be output is based on the longer side of the two broadcasts, but when transmitting small bit length information, the zero bit is filled in the MSB part and transmitted. In this case, when the packet length extractor 310 is applied, the TDMB information storage unit 301 and the DVB-H information storage unit 302 store header information related to the packet length and are applied to the time stamp extractor 330. The TDMB information storage unit 301 and the DVB-H information storage unit 302 store header information related to a time stamp.

FIG. 4 is a detailed block diagram illustrating the time slicing information extracting unit and the IP information extracting unit shown in FIG. 2. The time slicing information extracting unit 320 and the IP information extracting unit 340 may be designed in separate components or in the same structure as shown in FIG. 4.

The time slicing information extracting unit 320 and the IP information extracting unit 340, which are additionally extracted from the DVB-H, transmit a specific service stream at a sub-channel position where a transmission frame is defined every 96 ms even in the TDMB in the case of time slicing information. Since the information is not extracted from the header because it is transmitted, the TDMB information storage unit 301, DVB-H information storage unit 302, and mux (MUX) as shown in FIG. 303 and the bit extractor 304. Since the IP information extracting unit 340 does not handle this information in the TDMB, it transmits zero bit information. In this case, when applied to the time slicing information extraction unit 320, the TDMB information storage unit 301 and the DVB-H information storage unit 302 store header information related to time slicing and are applied to the IP information extraction unit 340. In this case, the TDMB information storage unit 301 and the DVB-H information storage unit 302 store header information related to IP.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, the present invention implements an integrated demultiplexing apparatus that demultiplexes the multimedia broadcasting signal of the DVB-H broadcasting standard and the multimedia broadcasting signal of the TDMB broadcasting standard, thereby enabling the simultaneous use of DVB-H and TDMB. When developing a broadcast receiving device, it is possible to prevent the complexity of circuit design caused by applying a demultiplexing device having a different configuration and to suppress the increase in unit cost.

Claims (4)

An integrated demultiplexing device that demultiplexes a multimedia broadcasting signal of the DVB-H broadcasting standard and a multimedia broadcasting signal of the TDMB broadcasting standard, The packet is divided and received according to the sync byte of a packet constituting a transport stream (TS) obtained by receiving the multimedia broadcast signal of the DVB-H broadcast standard or the multimedia broadcast signal of the TDMB broadcast standard. Program Specific Information / Service Information) and a TS demultiplexer for extracting section data, a video packet stream, an audio packet stream, and an auxiliary data packet stream. An integrated PSI / SI decoder for extracting service configuration information of a broadcast currently received from the PSI / SI section data provided from the TS demultiplexer; An integrated header processor for extracting packet length information, time stamp information, time slicing information, and IP (Internet Protocol) information from headers of the video packet stream, audio packet stream, and auxiliary data packet stream; The integrated header processing unit receives the service configuration information from the integrated PSI / SI decoder and provides the TS demultiplexer with a packet identification entity (PID) for extracting the video packet stream, the audio packet stream, and the auxiliary data packet stream. Service and decoding information processing unit for generating various control information for service and decoding by receiving the packet length information, time stamp information, time slicing information and IP information from Integrated demultiplexer for digital multimedia broadcasting comprising a. The method of claim 1, The integrated header processing unit may include: a header detection unit detecting a header information by finding a packet of a packetized elementary stream / synchronization layer (PES / SL) packet or a multi-protocol encapsulation (MPE) section of the packets constituting the TS; A packet length extraction unit for extracting a packet length from the header information according to a broadcast selection signal for selecting any one of the multimedia broadcast signal of the DVB-H broadcast standard and the multimedia broadcast signal of the TDMB broadcast standard; A time slicing information extraction unit for extracting the time slicing information from the header information according to the broadcast selection signal; A time stamp information extraction unit for extracting the time stamp information from the header information according to the broadcast selection signal; An IP information extracting unit extracting the IP information from the header information according to the broadcast selection signal Integrated demultiplexer for digital multimedia broadcasting comprising a. The method according to claim 1 or 2, The integrated header processor extracts a video elementary stream from the video packet stream and stores the video elementary stream in a video buffer, extracts an audio elementary stream from the audio packet stream and stores the audio elementary stream in an audio buffer. Extract the secondary data elementary stream and store it in the secondary data buffer Integrated demultiplexer for digital multimedia broadcasting. delete

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