Method for realizing IP stream mode service utilizing MPE-FEC technique in T-MMB system

A MPE-FEC, streaming mode technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve problems such as high overhead and reducing the number of transmission programs

Inactive Publication Date: 2007-08-22
NUFRONT MOBILE COMM TECH
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Problems solved by technology

[0004] The packet mode of DAB-IP has the advantages of burstiness and flexibility of transmission, and because of the additional forward error correction (FEC) technology, it has the advantages of strong anti-interference and good mobile performance compared with the traditional DAB packet mode , but due to the limitation of short packet length, the overhead of the packet header caused by encapsulation is relatively large for the transmission of video data, thereby reducing the number of transmitted programs correspondingly

Method used

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  • Method for realizing IP stream mode service utilizing MPE-FEC technique in T-MMB system
  • Method for realizing IP stream mode service utilizing MPE-FEC technique in T-MMB system
  • Method for realizing IP stream mode service utilizing MPE-FEC technique in T-MMB system

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Embodiment Construction

[0053] The T-MMB system involved in the present invention uses MPE-FEC to generate the IP flow mode signal flow chart as shown in FIG. 3 .

[0054] In order to realize the transmission of IP stream mode services in the T-MMB system, the MPE-FEC technology must be used to send the IP datagrams from the same IP service (with the same IP address) to the application data table in sequence, and pass through the RS ( 204, 188) after forward error correction protection and corresponding time interleaving, the IP data and check data are encapsulated into MPE segment and MPE-FEC segment respectively, and mapped to MPEG-2 TS packets as IP of T-MMB Stream mode services enter the T-MMB system for transmission.

[0055]The identifier of the IP streaming mode service of the T-MMB system is indicated by the DSCTy field in the FIG type 0 extension 2-FIG0 / 2. When DSCTy=011011, it means that the service is the IP streaming mode service of T-MMB, as shown in Figure 4 Show.

[0056] The specifi...

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Abstract

A method for realizing IP stream mode service in T-MMB system by utilizing MPE-FEC technique includes applying MPE-FEC technique to divide and restructure each IP data in IP service to for MPE-FEC frame form for making data be on effect of virtual time interface then packaging data to be MPE section and MPE-FEC section and adding real time parameter information in section head, fragmenting each data section and mapping fragmented data sections into MPEG-2 TS packet.

Description

technical field [0001] The invention relates to a digital multimedia broadcasting system, in particular to a method for realizing IP stream mode service in T-MMB service by using MPE-FEC multi-protocol encapsulation-forward error correction technology at the transmitting / receiving end of the T-MMB system. Background technique [0002] Terrestrial Mobile Multimedia Broadcasting (T-MMB) system is compatible with digital audio broadcasting DAB, and can realize time multiplexing of four types of services such as DAB, DAB-IP, T-DMB, and T-MMB in the transmission frame, as shown in the figure 1. Supports higher-order modulation methods, such as 8DPSK or 16DAPSK, which improves spectrum utilization, as shown in Figure 2. In addition to supporting the original convolutional coding, T-MMB business also adopts more advanced LDPC coding, which has stronger error correction capability. [0003] In order to be compatible with the IP backbone network and allow IP multimedia services to ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L1/00H04L27/26
Inventor 鲍东山王桥沈峰磊袁君张荣
Owner NUFRONT MOBILE COMM TECH
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