KR101068086B1 - Integrated terrestrial mobile multimedia broadcast receiver and receiving method thereof - Google Patents

Abstract

The present invention relates to a receiver for receiving terrestrial mobile multimedia broadcasting and a method of receiving the same.

The Korea, China and Japan integrated terrestrial broadcast receiver according to the present invention parses a video stream, an audio stream, a JPEG / PNG stream, SD and an OD, and codes a video stream, an audio stream, a JPEG / PNG stream, an SD and an OD with a codec. TS parser unit input to branching unit, codec unit decoding MPEG2_AAC, MPEG4_AAC, MPEG4_BSAC, H264 (620-4) and JPEG / PNG, Decoding Time Stamp (DTS) time control unit controlling time of decoded streams (Dts Clock Control), a codec branching unit for branching data received from the TS parser into an audio, video, and data codec, a video ring buffer (BUFFER) and a codec unit 620 for storing the video stream decoded by the codec unit 620. AUDIO RING buffer for storing the decoded audio stream, BIFS (JPEG / PNG) RING buffer for storing the JPEG / PNG stream decoded by the codec unit 620, and outputting the audio stream stored in the AUDIO RING buffer to an external speaker. Audio CallBack, Video Render Task that outputs video streams stored in the VIDEO RING buffer to an external display, and BIFS Rendering task that outputs JPEG / PNG streams stored in a BIFS (JPEG / PNG) RING buffer to an external display device. Include.

According to the present invention, one terrestrial mobile multimedia broadcasting receiver can receive and receive all terrestrial mobile multimedia broadcastings of Korea, China, and Japan.

Integrated terrestrial, broadcast receiver, broadcast reception method, TS stream, PAT (Program Association Table)

Description

INTEGRATED TERRESTRIAL MOBILE MULTIMEDIA BROADCAST RECEIVER AND RECEIVING METHOD THEREOF}

The present invention relates to a receiver for receiving terrestrial mobile multimedia broadcasting and a method of receiving the same.

Terrestrial Mobile Multimedia Broadcasting Environment in Korea, China, and Japan

In the 21st century's information society, broadcasting and communication services are entering the age of full-fledged digitalization, multi-channelization, broadband, high quality, globalization and bi-directionality. Also, as people spend more time outside their homes, the demand for watching TV broadcasts outside their homes has increased significantly. In this situation, many studies have been conducted to develop a mobile multimedia broadcasting system for fixed, portable and mobile reception internationally. Recently, various standardizations are being made for technologies that support mobile Internet and variable transmission rates for each subscriber, but there are limitations in terms of mobile reception performance and cost in order to implement a multimedia streaming service. Accordingly, it is necessary to develop a mobile multimedia broadcasting system suitable for mass information transmission in mobile and portable receiving environments. In this situation, the application of digital technology to broadcasting has enabled mobile multimedia broadcasting to watch TV outside the home, opening a new era where anyone can watch TV broadcasting anytime, anywhere. Currently, mobile multimedia broadcasting system standards developed for mobile multimedia broadcasting services include T-DMB, CMMB, and ISDB-T in each of Korea, China, and Japan.

T-DMB, which is used in Korea, has improved the performance of Eureka-147 digital audio broadcasting (DAB) system to enable video service. In terms of the video / audio compression standard, MPEG-4 AVC is adopted for video and MPEG-4BSAC-ER for audio. Meanwhile, OD / BIFS and SL packetization are adopted for various multimedia processing technologies of MPEG-4 as a synchronization / multiplex standard, and MPEG-2 TS technology used in DTV is applied.

CMMB, which is used in China, stands for China Mobile Multimedia Broadcasting, and is the first multimedia operating system system developed by China. It was developed to be applied to various handsets such as mobile phones, PDAs, MP3s, MP4s, digital cameras, notebooks, etc., and China has declared its own development standard.

In Japan, "ISEG-T", a mobile portable broadcasting station of the original standard (ISDB-T), is used. ISDB-T was developed with two goals: providing HDTV and mobile multimedia broadcasting services. MPEG-2 Layer II AC-3 and MPEG-2 AAC are used for audio coding, and MPEG-2 multiplexing is used. The video uses H264.

Hereinafter, the structure of the MPEG2 TS System for each country and the decoder codec used will be described.

The terrestrial broadcast stream composition, MPEG-2 TS Parser, and MPEG4 System Logic of each country are described as follows.

Korea's Terrestrial Mobile Multimedia Broadcasting System

1 is a flowchart illustrating a process of receiving a broadcast in a T-DMB system used in Korea.

ADT is set when the value of Adaptation_field_control is '2' or '3' in the TS stream of 188 bytes. If the value of Adaptation_field_control is not '2' or '3', go to the next step to check the PID value. If the PID is 0x000, PAT (program association table) is set. If PID value is not 0x000, check PAT Setting flag and if this value is 0, it is returned as NO. If this value is 1, if Program_map_PID value set in PAT is set value, it is determined as PMT_PID value. Set IOD value in Descriptor1 (IOD_Descriptor) and set AUDIO_PID, VIDEO_PID, BIFS_PID, OD_PID, SD_PID value to be used in PES according to Stream_type and Elementary_PID value in Descriptor2 (SL_Descriptor). The PID values set as above are identified as YES in the PMT part and processed in the PES. If PID values are not set, it is returned from PMT part.

In the PES part, H264 Init, MPEG4_BSAC Init, and JPEG / PNG Init are performed by checking the MPEG4_PID (OD_PID) value set in the PMT. After this configuration, the BIFS tree is constructed by checking the value of MPEG4_PID (SD_PID).

When the above operation is completed, the MPEG4_OD value is checked and returned if it is not set, and if it is set, the stream is stored using the encoded H264, MPEG4 BSAC, JPEG / PNG value data structure and algorithm (Linked List). That is, the encoded video, audio, image, etc. extracted from the PES are temporarily stored in a like list, and decoded by each decode codec and then released. After that, decoding and rendering are performed in the player stage. Here, MPEG4_OD is a structure pointer set in MPEG4_PID (OD_PID).

China's terrestrial mobile multimedia broadcasting system

2 is a flowchart illustrating a process of receiving a broadcast in a CMMB system used in China.

The Chinese CMMB is almost similar to the MPEG2 TS and MPEG4 systems of T-DMB in Korea, and only the codec part is different. China's terrestrial mobile multimedia channel consists of 25 TV channels and 30 audio channels.

TS-stream of 188 bytes is set to ADT if the value of Adaptation_field_control is '2' or '3'. Otherwise, go to the next step and check the PID value. If PID is 0x000, PAT is set. If it is not 0x000, check the PAT setting flag. If the value is 0, it is confirmed as NO and returned.

If Program_map_PID value set in PAT is set value, it is determined as PMT_PID value and IOD value is set in Descriptor1 of PMT section, and AUDIO_PID, VIDEO_PID, OD_PID and SD_PID value are used in Descriptor2. PID values set as above are confirmed as YES in PMT part and processed in PES. If PID values are not set, it is returned from PMT part.

The PES part first checks the MPEG4_PID (OD_PID) value set in the PMT, and initializes MPEG4_BSAC and MPEG4_AAC_SBR through video H264 Init and audio OD Type (Audio Object Type) in ISO / IEC MPEG4Section. That is, the codec of H264, MPEG4_BSAC, MPEG4_AAC_SBR is initialized with reference to the table which defines the types of video, audio, and BIFS in MPEG4.

After this configuration, check the MPEG4_PID (SD_PID) value to configure the BIFS tree.

After the basic operation is completed, MPEG4_OD value is checked and returned if it is not set. If it is set, video is transmitted through H264 and audio is transmitted through Audio Object Type. MPEG4 BSAC, MPEG4_AAC_SBR value data structure and algorithm (Linked Save the stream using List) and perform decoding and rendering at the player end. The division of MPEG4_BSAC Init, MPEG4_AAC_SBR Init, MPEG4_BSAC, and MPEG4_AAC is selected by the value set in PMT_PID (Elementary_PI).

Japan's terrestrial mobile multimedia broadcasting system

3 is a flowchart illustrating a process of receiving a broadcast in an ISDB-T system used in Japan.

The feature of Japanese ISDB-T is that it does not use PAT_PID (0x000) value and does not use MPEG4 OD or SD. DSMCC_DESCRIPTOR and BML (Broadcast Markup Language) are not described here.

In order to receive a broadcast, first, ADT is set when the value of Adaptation_field_control of a 188-byte TS stream is '2' or '3'. Otherwise, the next step is to check the PID value. However, in the Japanese ISDB-T system, the PID does not use a value of 0x000. That is, PAT is not used in the Japanese ISDB-T system.

In ISDB-T, as shown in Table 1, PMT_PID value for partial reception is predefined.

Service number PMT_PID for partial reception 0 0x1FC8 One 0x1FC9 2 0x1FCA 3 0x1FCB 4 0x1FCC 5 0x1FCD 6 0x1FCE

If the PMT_PID value matches the value in Table 1, set the DSMCC value using the Stream_type, Elementary_PID, and Descriptor_tag in the PMT section.

If the PMT_PID value does not match the value in Table 1, check to see if the PMT section is set and return if NO; if YES, PMT_FLAG. If NO, encode the H264. MPEG-2 AAC is stored (temporarily stored before decoding) using a data structure and algorithm (Linked List). The player stage then decodes and renders.

More and more traders, entrepreneurs and travelers are traveling between Korea, China and Japan. However, because each country uses a different terrestrial multimedia broadcasting service, there is a problem in that a receiver of one country cannot receive a broadcast of another country.

An object of the present invention is to provide a method and apparatus for receiving terrestrial multimedia broadcasting using a terrestrial multimedia broadcasting receiver in Korea, China, and Japan.

In the integrated terrestrial broadcast reception method according to the present invention, a first step of receiving a transport stream (TS), a second step of determining whether the value of Adaptation_field_control of the TS stream is '2' or '3', and the value of Adaptation_field_control If it is '2' or '3', ADT (Adaptation Field) is set, and if the value of Adaptation_field_control is not '2' or '3', the process proceeds to determining a PAT (Program Association Table) _PID (Packet ID) value. In the third step, if the PAT_PID value is 0x000, the PAT is set. If the PAT_PID value is not 0x000, the fourth step is to determine whether the PAT is set. If the PAT is set, the PMT (Program Map Table) _PID value is currently parsed. Compared with the PMT_PID value, if the PAT is not set, the fifth step of generating and setting a pseudo PAT.If the PMT_PID value is the same as the currently parsed PMT_PID value, the IOD which is an MPEG4 system part is set, and each ObjectID PID Value structure If the PMT_PID value is different from the currently parsed PMT_PID value, the stored value of the structure is determined. If the stored value is not null, the first step proceeds. If the stored value of the structure is not null, the packetized elementary stream (PES) step is defined. In the sixth step of proceeding to step, the seventh step of Codec Initing video, audio, and BIFS according to the MPEG4_PID value in the PES step, the eighth step of storing the stream encoded according to the MPEG4_OD value in the PES step, the MPEG4_PID value exists If the MPEG4_OD value is a terrestrial wave that exists, the stream of the matching object is stored in a temporary buffer by comparing the currently parsed PMT_PID value and the PID value of the Object ID.If the MPEG4_OD value and the terrestrial wave where the MPEG4_OD value does not exist, PMT_FLAG If the value of PMT_FLAG does not exist according to the ninth step of inspection and the result of the inspection of PMT_FLAG, the encoded stream is stored. If the value of PMT_FLAG exists, A tenth step of not processing the BML.

In the sixth step, terrestrial waves using the MPEG4 system set IOD in PMT Descriptor1 (IOD_Descriptor), set Stream_type and Elementary_PID values in Descriptor2 (SL_Descriptor), and stream_type and Elementary_PID to AUDIO_PID, VIDEO_PID, OD_PID, SD_PID and BIFS PID. Or AUDIO_PID, VIDEO_PID, OD_PID and SD_PID.

In the seventh step, the video is H264 Init, the audio is MPEG4 BSAC Init, the BIFS is Codec Init PNG / JPEG Init, or the video is H264 Init, the audio is OD Audio Type Inspected MPEG4 BSAC Init and MPEG4 AAC SBR Init It is desirable to.

In the eighth step, video is stored using H264, audio is MPEG4 BSAC and data is encoded using DATA (JPEG / PNG), or video is H264 and audio is determined by Object Type. It is desirable to store streams encoded using MPEG4 BSAC and MPEG4 AAC.

In the tenth step, video is stored using H264, and audio is stored using MPEG2 AAC.

An integrated terrestrial broadcast receiver according to the present invention parses video streams, audio streams, JPEG / PNG streams, SDs and ODs, and inputs the video streams, audio streams, JPEG / PNG streams, SDs and ODs into a codec branch. TS Parser, MPEG2_AAC, MPEG4_AAC, MPEG4_BSAC, Codec unit to decode H264 (620-4) and JPEG / PNG, Decoding Time Stamp (DTS) to control the time of decoded streams Dts Clock Control , A codec branching unit for branching data received from the TS parser into an audio, video, and data codec, a video ring buffer (BUFFER) storing a video stream decoded by the codec unit 620, and audio decoded by the codec unit 620. AUDIO RING buffer for storing the stream, BIFS (JPEG / PNG) RING buffer for storing the JPEG / PNG stream decoded by the codec unit 620, Audio CallBack, VIDEO RIN for outputting the audio stream stored in the AUDIO RING buffer to the external speaker. A video rendering task for outputting a video stream stored in the G buffer to an external display and a BIFS rendering task for outputting a JPEG / PNG stream stored in a BIFS (JPEG / PNG) RING buffer to an external display device.

The TS parser unit extracts MPEG4_AAC, MPEG4_BSAC, H264, JPEG / PNG, OD, and SD streams which have been subjected to MPEG-2 PAT, ADT, PMT, PES, and encoded through the MPEG-4 SL (Sync Layer) stage. Do.

In the case of the ISDB-T signal, it is preferable that the codec unit does not use OD, SD, and SL layers, but uses MPEG2_AAC for audio and H264 for video.

Decoded MPEG2_AAC, MPEG4_AAC, and MPEG4_BSAC streams are stored in the order entered in the AUDIO RING buffer, decoded H264 streams are stored in the order entered in the VIDEO RING buffer, and decoded JPEG / PNG streams are entered in the BIFS RING buffer. Preferably stored as is.

According to the present invention, one terrestrial multimedia broadcasting receiver can receive and receive all terrestrial multimedia broadcastings of Korea, China, and Japan.

An integrated terrestrial broadcast reception method according to the present invention will be described with reference to the flowchart of FIG. 4.

First, in step S501, a TS stream is received.

Next, in step S502, it is determined whether the value of Adaptation_field_control of the TS stream is 2 or 3, and if the value of Adaptation_field_control of the TS stream is 2 or 3, the flow proceeds to step S503, and otherwise, the flow goes to step S504.

In step S503, an ADT is set, and then the flow proceeds to step S504.

In step S504, the PAT_PID value is checked. If the PAT_PID value is 0x000, the process proceeds to step S505. If the PAT_PID value is not 0x000, the process proceeds to step S506.

In step S505, the PAT is set, and then, the flow advances to step S506.

5 is a diagram showing the structure of a PAT used in the present invention. The PAT 610 includes information such as PID information of a PMT, a program number, a TS ID, and the like. The PAT 610 corresponds to the plurality of PMT service numbers 621 and 622. The number of PMTs indicates how many services exist in the transport layer (TS) that is currently being transmitted. The PAT includes PID information such as video, audio, and data (BIFS) content corresponding to each service.

4, if the PAT is NO, it is determined whether or not the PAT is set in step S505. If the PAT is not set, the flow advances to step S507. If the PAT is set, the flow advances to step S509.

In step S507, the parsed PID value is compared with the PMT_PID value in Table 2 below, and if the parsed PID value is not one of the PMT_PID values of ISDB-T shown in Table 2 below, the process returns to step S501 and the parsed PID value is set in the table below. If it is one of the PMT_PID values of ISDB-T shown in 2, the flow proceeds to step S508.

Service number PMT_PID for partial reception 0 0x1FC8 One 0x1FC9 2 0x1FCA 3 0x1FCB 4 0x1FCC 5 0x1FCD 6 0x1FCE

In step S508, a pseudo PAT is set, and then the flow proceeds to step S510.

In step S509, the PMT_PID value is compared with the currently parsed PMT_PID value, and if the PMT_PID value is different from the currently parsed PMT_PID value, the flow proceeds to step S511.

In step S510, in the case of Korea and China, IOD (S510-1), which is an MPEG4 system part, is set, and PID (S510-2) values, which are respective ObjectIDs, are defined in the structure. In Japan, ISDB-T does not use MPEG 4 system parts, and only PID (S510-2) values, which are respective ObjectID values, are defined in the structure.

In step S511, if the structure in which the values S510-1 and S510-2 are stored in step S510 is not null, the process moves to step S512. If the structure is null, the process returns to step S501.

In step S512, in the case of Korea and China, the currently parsed PID value is first compared with the value parsed in steps S510-1 and S510-2 to OD_PID or SD_PID to initialize the value of a matching object. If the PID value currently parsed in S512 is equal to OD_PID, the process proceeds to S513-1 through S513.

In Korea, video is coded in H264 Init (S513-3), audio in MPEG4 BSAC Init (S513-6), and BIFS (PNG / JPEG) in 513-4. In China, MPEG-4 BSAC Init (S513-6) and MPEG4 AAC SBR Init (S513-7) Codec Init are examined by checking H264 Init (S513-3) for video and OD audio type (S515-5) for audio.

After the initialization of the codec, the PID value currently parsed in S512 is compared with the SD_PID value, and if the same, the BIFS tree is configured through S513 and SD (S513-2) (S515-8). Japan's ISDB-T does not support the OD / SD (S513-1, S513-2) because it does not use the MPEG4 system. In the case of Korea and China, if YES in MPEG4_OD (S514), that is, (OD / SD (S515-1, S515-2) is set, the current parsed PID value matches the PID value set in S510-2). The stream of the object to be stored is stored in a temporary buffer in Korea, video using H264 (S514-1), audio using MPEG4 BSAC (S514-4), and data using DATA (JPEG / PNG) (S514-). In China, video uses H264 (S514-1) and audio uses MPEG4 BSAC (S514-4) and MPEG4 AAC (S514-5), which are determined by Object Type (S514-3). Stores the encoded stream, which is received in real time, so the order of reception of the audio / video streams is random.

In the case of ISDB-T in Japan, since MPEG4_PID (S512) and MPEG4_OD (S514) are NO, the flow proceeds to step S515. In step S515, if PMT_FLAG (S515) is checked, if NO, video uses H264 (S514-1), and audio stores stream encoded using MPEG2 AAC (S514-6), and in step S515, PMT_FLAG (S515). If YES is checked, the process proceeds to S516, and the BML (S516) that is the DSMCC section is not processed.

In step S513, the MPEG4_PID (S512) determines whether the currently parsed PID is equal to the OD_PID or SD_PID value, and if only the PID (S510-2) value, which is each ObjectID value in S510-2, is equal to the OD_PID and SD_PID values stored in the structure, the OD ( The process proceeds to S513-1) / SD (S513-2), and if it is not equal to the MPEG4-PID value and the currently parsed PID value, the process proceeds to step S514.

In step S514, it is determined whether the OD (S513-1) / SD (S513-2) is set. If not, the process proceeds to step S515.

In the mobile multimedia broadcasting reception method according to the present invention described above, PAT_PID is defined as 0x000 in the mobile multimedia broadcasting system of Korea and China, and there is no PAT_PID in the Japanese mobile multimedia broadcasting system. It is using the defining point.

In order to implement the Korea-China-Japan integrated parser, since there is no PAT_PID in Japan ISDB-T, if the PMT_PID of Table 2 is the TS parser in step S507, a PSEUDO PAT is created and the process proceeds to the PMT (S510). In other words, the Japanese I-SDBT does not support PAT_PID and the value in Table 2 is carried as the PMT_PID value. Based on the values in Table 2, it is determined that the stream is a PMP stream.

Hereinafter, the mobile multimedia broadcasting reception method according to the present invention described above will be described in more detail.

In the PMT S510, only MPEG2 Stream_type and Elementary_PID values are set. Since ISDB-T does not use the MPEG4 system, if the MPEG4_OD value is not set in the PES, it is determined to be an ISDB-T audio / video stream. Stores an audio MPEG2 AAC stream in a linked list.

Since mobile terrestrial multimedia broadcasting players in Korea and China use MPEG4 system, IOD is set in PMT Descriptor1 (IOD_Descriptor) and Stream_type and Elementary_PID value are set in Descriptor2 (SL_Descriptor). In Korea, up to AUDIO_PID, VIDEO_PID, OD_PID, SD_PID, and BIFS PID in Stream_type and Elementary_PID. In China, up to AUDIO_PID, VIDEO_PID, OD_PID, and SD_PID in Stream_type and Elementary_PID.

The PMT value is set as OD / SD in PES.In Korea, encoded video H264, audio MPEG4_BSAC, JPEG / PNG, and in China, encoded video H264, audio is linked to MPEG4_BSAC, MPEG4_AAC using OD Type. Store in The classification of audio MPEG4_BSAC and MPEG4_AAC is selected by a value set in PMT_PID (Elementary_PI).

6 is a block diagram of an integrated terrestrial broadcast receiver according to the present invention.

The TS parser unit 610 parses the video stream 610-1, the audio stream 610-2, the JPEG / PNG stream 610-3, the SD 610-4, and the OD 610-5. The TS parser 610 executes the mobile multimedia broadcasting method described above with reference to FIG. 4.

The video stream 610-1, the audio stream 610-2, the JPEG / PNG stream 610-3, the SD 610-4, and the OD 610-5 are codec branches CODEC TASK 630. Is entered. After the OD 610-5 is input to the OD parser 660, the OD 610-5 initializes the codec by using the codec unit 620.

The codec unit 620 decodes MPEG2_AAC 620-1, MPEG4_AAC 620-2, MPEG4_BSAC 620-3, H264 620-4, and JPEG / PNG 620-5.

The codec branching unit 630 branches data received from the TS parser unit 610 into an audio, video, and data codec. The codec branching unit 630 uses a SD parser to construct a tree and decodes the stream decoded by the codec unit 620 by AUDIO RING BUFFER 640, VIDEO RING BUFFER 642, and BIFS (JPEG / PNG) RING BUFFER 644. Audio CallBack (640-1) and Video Render TASK (642-1) as a TASK, which are respectively stored in the output device and output through the buffers 640, 642, and 644, and output through the output device, that is, the speaker 670 and the display 680. ) And BIFS Render TASK 644-1 are configured, respectively.

The solid arrows connecting each module indicate stepwise data transfer, the dash arrows indicate time setting, and the dashed arrows indicate render buffer control.

In the integrated terrestrial broadcast receiver shown in FIG. 6, data conversion and flow proceed as follows. The TS stream digital data is parsed by the TS parser unit 610 which parses the MPEG-2 TS. Referring to the operation flow of the TS parser unit 610, the MPEG-4 SL through the Program Association Table (PAT), the Adaptation Field (ADT), the Program Map Table (PMT), and the Packetized Elementary Stream (PES) of MPEG-2. MPEG-4_AAC, MPEG4_BSAC, H264 and JPEG / PNG, OD and SD streams encoded through the (Sync Layer) stage are extracted.

 As described above, ISDB-T does not use OD, SD, and SL layers, but uses MPEG2_AAC in audio.

Of these streams, SD (Scene Description) streams are parsed to form a tree, and the CODEC unit 620 decodes MPEG4_AAC, MPEG4_BSAC, MPEG2_AAC, H264, and JPEG / PNG. The decoded streams are temporarily stored in the render buffer 640 by the DTS clock control 690. The decoded BSAC stream is stored in the order entered in the AUDIO RING BUFFER 640, and the H264 stream is also stored in the order entered in the VIDEO RING BUFFER 642 in the same way as the audio, and decoded after decoding by the JPEG / PNG decoder. The stored streams are stored in the order entered in the BIFS RING BUFFER 644.

In order to receive streams stored in the renderer buffers (640, 642, and 644) according to the CTS values of audio and video, the audio callback (640-1) first controls the CTS time control ( 610 receives the frames stored in the AUDIO RENDER BUFFER 640 through the output device, that is, the speaker 670 in the order of input. The Video Render TASK 642-1 renders the streams stored in the order input to the VIDEO RENDER BUFFER 642 on the output device, that is, the display 680 device, and outputs the overlays as an overlay. ) Renders a JPEG / PNG image stored in BIFS RING BUFFER 644 on an output device, ie, display 680.

In accordance with the present invention. medium. Due to the integrated mobile multimedia broadcasting receiver, travelers, traders, international students, businessmen, and the like can receive a broadcast freely with one receiver without having to use different receivers for each country. In addition, if the traveler is placed in an emergency disaster in the travel bureau, it is possible to respond quickly based on the disaster information of the travel bureau.

1 is a flowchart illustrating a process of receiving a broadcast in a T-DMB system used in Korea.

2 is a flowchart illustrating a process of receiving a broadcast in a CMMB system used in China.

3 is a flowchart illustrating a process of receiving a broadcast in an ISDB-T system used in Japan.

4 is a flowchart illustrating a method for receiving an integrated terrestrial broadcast according to the present invention.

5 is a diagram showing the structure of a PAT used in the present invention.

6 is a block diagram illustrating an integrated terrestrial broadcast receiver according to the present invention.

Claims (9)

A first step of receiving a transport stream (TS); A second step of determining whether a value of Adaptation_field_control of the TS stream is '2' or '3'; If the value of the Adaptation_field_control is '2' or '3', an ADT (Adaptation Field) is set.If the value of the Adaptation_field_control is not '2' or '3', a PAT (Program Association Table) _PID (Packet ID) value is set. A third step of proceeding to the determining step; A fourth step of determining whether the PAT is set if the PAT_PID value is 0x000 and if the PAT_PID value is not 0x000; A fifth step of comparing the PMT_PID value with the currently parsed PMT_PID value when the PAT is set, and generating and setting a pseudo PAT if the PAT is not set; If the PMT_PID value is equal to the currently parsed PMT_PID value, set the IOD which is an MPEG4 system part and define PID values of each ObjectID in the structure, and store the structure if the PMT_PID value is different from the currently parsed PMT_PID value. A sixth step of determining a value and proceeding to the first step if it is null, and proceeding to a packetized elementary stream (PES) step if the stored value of the structure is not null; A seventh step of Codec Initing video, audio, and BIFS according to MPEG4_PID value in the PES step; An eighth step of storing the stream encoded according to the MPEG4_OD value in the PES step in a buffer; If the MPEG4_PID value does not exist and the MPEG4_OD value exists, the stream of the matching object is stored in a temporary buffer by comparing the currently parsed PMT_PID value and the PID value of the Object ID, and the MPEG4_PID value and the MPEG4_OD value are A ninth step of checking PMT_FLAG when the terrestrial wave does not exist; And And a tenth step of storing the encoded stream when the PMT_FLAG value does not exist according to the check result of the PMT_FLAG, and not processing the BML when the PMT_FLAG value exists. The method of claim 1, In the sixth step, the terrestrial wave using the MPEG4 system sets an IOD in PMT Descriptor1 (IOD_Descriptor), sets Stream_type and Elementary_PID values in Descriptor2 (SL_Descriptor), Up to AUDIO_PID, VIDEO_PID, OD_PID, SD_PID and BIFS PID from the Stream_type and Elementary_PID, or Integrated terrestrial broadcast reception method, up to AUDIO_PID, VIDEO_PID, OD_PID, and SD_PID. The method of claim 1, In the seventh step, the video is H264 Init, the audio is MPEG4 BSAC Init, the BIFS is Codec Init PNG / JPEG Init, or the video is H264 Init, and the audio is OD audio type to check MPEG4 BSAC Init and MPEG4 Integrated terrestrial broadcast reception method using Codec Init of AAC SBR Init. The method of claim 1, In the eighth step, the video uses H264, the audio uses MPEG4 BSAC, the data stores the stream encoded using DATA (JPEG / PNG), or the video uses H264, and the audio corresponds to the Object Type. Integrated terrestrial broadcast receiving method for storing a stream encoded by using the MPEG4 BSAC and MPEG4 AAC determined by. The method of claim 1, In the tenth step, video uses H264, and audio stores a stream encoded using MPEG2 AAC. A TS parser unit for parsing a video stream, an audio stream, a JPEG / PNG stream, an SD, and an OD, and inputting the video stream, the audio stream, the JPEG / PNG stream, an SD, and an OD into a codec branching unit. ; A codec unit for decoding MPEG2_AAC, MPEG4_AAC, MPEG4_BSAC, H264 620-4, and JPEG / PNG; A Decoding Time Stamp (DTS) time controller for controlling the time of the decoded streams; A codec branching unit 630 for branching data received from the TS parser into an audio, video, and data codec; A video ring buffer (BUFFER) for storing the video stream decoded by the codec unit 620; An audio ring buffer for storing the audio stream decoded by the codec unit 620; A BIFS (JPEG / PNG) RING buffer for storing the JPEG / PNG stream decoded by the codec unit 620; An audio call back outputting an audio stream stored in the audio ring buffer to an external speaker; A video render task for outputting a video stream stored in the video ring buffer to an external display; And And a BIFS rendering task for outputting a JPEG / PNG stream stored in the BIFS (JPEG / PNG) RING buffer to an external display device. The method of claim 6, The TS parser unit extracts MPEG4_AAC, MPEG4_BSAC, H264, JPEG / PNG, OD and SD streams which have been subjected to PAT, ADT, PMT, PES of MPEG-2 and encoded through SL (Sync Layer) of MPEG-4. Integrated terrestrial broadcast receiver. The method of claim 6, And the codec unit uses MPEG2_AAC for audio and H264 for video, without using OD, SD, and SL layers for ISDB-T signals. The method of claim 6, The decoded MPEG2_AAC, MPEG4_AAC and MPEG4_BSAC streams are stored in the order input to the AUDIO RING buffer, The decoded H264 stream is stored in the order input to the VIDEO RING buffer, And the decoded JPEG / PNG stream is stored in the order entered in the BIFS RING buffer.

Images