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
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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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