Method for digital audio multiplex transmission in multimedia broadcasting system

A multimedia broadcasting and digital audio technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problem of wasting bandwidth resources, and achieve the effect of saving bandwidth resources, reducing the amount of redundant data, and strengthening practical value

Inactive Publication Date: 2011-04-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For CMMB multiplexing transmission, the payload header is not necessary; in a multiplexing subframe, the above payload header is transmitted multiple times, there is redundancy, and bandwidth resources are wasted

Method used

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  • Method for digital audio multiplex transmission in multimedia broadcasting system
  • Method for digital audio multiplex transmission in multimedia broadcasting system
  • Method for digital audio multiplex transmission in multimedia broadcasting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: An embodiment in which each audio single frame is placed in a CMMB audio unit for multiplexing transmission.

[0051] As shown in Figure 1, the multiplexing sub-frame structure in the method of this example includes a sub-frame header and a video / audio / data segment. The video / audio / data segment consists of a segment header and several units. The audio The segment is composed of audio segment headers and multiple audio units.

[0052] The process of implementing audio multiplexing transmission in Embodiment 1 includes the following steps:

[0053] Step 110: First, the multiplexer extracts the audio single frame data and related parameter information from the received RTP audio packet:

[0054] For the first RTP audio group packet, directly remove the payload header and extract the first audio single frame;

[0055] For the second RTP audio group packet, remove the payload header contained therein, and divide the audio payload into the second, third, and fourth audio...

Embodiment 2

[0066] Embodiment 2: Aggregate several audio single frames into composite frames, and then put the composite frames in the CMMB audio unit for multiplexing transmission.

[0067] As shown in Figure 2, the multiplexing sub-frame structure in this example method includes a sub-frame header and a video / audio / data segment. The video / audio / data segment is composed of a segment header and several units. The audio A segment consists of an audio segment header and multiple audio units. Each audio unit includes an aggregate frame, and each aggregate frame includes several audio single frames. In other application examples of the present invention, each audio unit may also include multiple aggregated frames.

[0068] The process of implementing multiplexing transmission in Embodiment 2 includes the following steps:

[0069] Step 210: First, extract the audio single frame data and related data parameter information from the received RTP audio group packet:

[0070] For the first RTP audio group...

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Abstract

The invention discloses a method for multiplexing transmission of digital audio in a multimedia broadcasting system, which comprises the following steps: after a broadcasting sending end removes a load head from an audio load to be transmitted, audio single-frames are extracted from the audio load to be transmitted; each audio single-frame is taken as the content of an audio unit, or one or more polyframes are formed by connecting the audio single-frames from heads to tails, and each polyframe is taken as the content of one audio unit; and audio data is multiplexingly transmitted to a broadcasting receiving end through a multiplexing protocol of the multimedia broadcasting system after at least one audio unit multiplexingly forms multiplexing subframes. The application of the method can remove unnecessary load heads when the multiplexing transmission of the audio data is realized, thereby reducing redundant data amount and saving precious bandwidth resources.

Description

Technical field [0001] The present invention relates to the technical field of multimedia broadcasting, in particular to a method for multiplexing and transmitting digital audio in a multimedia broadcasting system. Background technique [0002] With the development of communication technology, the application of multimedia broadcasting technology has become more and more extensive, such as weather information, stock quotes, and live events on mobile terminals such as mobile TV and multimedia mobile phones. At present, the China Mobile Multimedia Broadcasting System (CMMB) standard specifies the frame structure, channel coding and modulation of the broadcast channel of the mobile multimedia broadcasting system within the frequency range of the broadcast service. The CMMB standard "Mobile Multimedia Broadcasting Part 2: Multiplexing" stipulates that multiplexed subframes are used to encapsulate streaming media data such as video and audio for transmission. [0003] The digital multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/2368H04N21/8547
Inventor 张建强童登金晏祥彪江华
Owner ZTE CORP
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