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Transmission method and system for video/audio data flow

A transmission method and data stream technology, applied in the direction of pulse modulation TV signal transmission, etc., can solve the problems of reducing playback efficiency, increasing terminal calculation amount, and increasing playback delay, so as to reduce playback delay, improve multiplexing efficiency, and improve The effect of demultiplexing performance

Inactive Publication Date: 2008-09-24
ZTE CORP
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Problems solved by technology

[0005] It can be seen from the above content that because the multiplexing frame adopts the form of multi-level multiplexing, it brings repeated header structure and wastes precious wireless channel bandwidth; and for the terminal, correspondingly, multi-level multiplexing analysis is required, This increases the calculation amount of the terminal; on the other hand, the video and audio units analyzed by the terminal are not directly decodable units, so buffering and sorting mechanisms need to be added, which increases playback delay and reduces playback efficiency

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  • Transmission method and system for video/audio data flow
  • Transmission method and system for video/audio data flow
  • Transmission method and system for video/audio data flow

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Embodiment Construction

[0038] The main idea of ​​the present invention is that in the mobile multimedia system, the front end is multiplexed, and each video or audio frame is mapped into a separate directly decodable CMMB video or audio unit, and then the video or audio unit is written in sequence. Enter the CMMB multiplexing subframe, and the multiplexing front end generates a complete multiplexing frame from the one or several multiplexing subframes, and then sends it out through the CMMB channel;

[0039] After receiving the multiplexed frame, the terminal extracts the multiplexed subframe corresponding to the program to be played, and then parses the multiplexed subframe to obtain directly decodable video or audio units for playback.

[0040] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0041] A system for sending video and audio data streams in a CMMB system, including a sendin...

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Abstract

The invention discloses a transmission method and a system of a video-audio data stream, which relates to the mobile streaming media field. The transmission method of the video-audio data stream proposed by the invention orderly writes one frame data which can be decoded and is provided with the same time stamp into a multiplex subframe after being encapsulated into a video or an audio unit from a video or an audio stream waiting to be transmitted according to the frame boundary, The playing time information of each video or audio unit is recorded in the multiplex subframe, and the generated multiplex subframe is sent to a terminal. The method of the invention can increase the CMMB multiplexing efficiency, reduce the playing delay of the terminal and improve the de-multiplexing performance of the terminal.

Description

technical field [0001] The invention relates to the field of mobile streaming media, in particular to a method and system for transmitting video and audio data streams. Background technique [0002] The China Mobile Multimedia Broadcasting System (referred to as CMMB) standard stipulates the frame structure, channel coding and modulation of the broadcast channel transmission signal of the mobile multimedia broadcasting system within the frequency range of the broadcasting service. "Mobile Multimedia Broadcasting Part 2: Multiplexing" (referred to as CMMB multiplexing standard) stipulates that multiplexing subframes are used to encapsulate video, audio and other media data transmission, and the corresponding encapsulation structure of video, audio, and data units is defined . [0003] The CMMB multiplexing subframe is composed of a subframe header and a video or audio data segment, and information such as the encoding type of the video or audio segment is recorded in the sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/52
Inventor 阮亚平刘志强彭铭
Owner ZTE CORP
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