A video and audio synchronization playing method for mobile multimedia broadcasting

A technology for mobile multimedia and synchronous playback, applied to color TV parts, TV system parts, TVs, etc., can solve the problems of not being suitable for mobile broadcasting networks and small network bandwidth, and achieve bandwidth saving and high transmission efficiency Effect

Inactive Publication Date: 2007-05-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above RTP method has a relatively small overhead on network bandwidth, but it is only suitable for use in IP networks, not suitable for use in mobile broadcast networks

Method used

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  • A video and audio synchronization playing method for mobile multimedia broadcasting
  • A video and audio synchronization playing method for mobile multimedia broadcasting

Examples

Experimental program
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Embodiment Construction

[0022] As shown in Figure 1, the data of a channel is composed of subframe header, video segment, audio segment and data segment, wherein the subframe header information is the common information of a channel, including some control information and media description information, among which There is a field start playing time, which is used to indicate the start playing time of the channel data.

[0023] As shown in FIG. 2 , the video data includes a video segment header and multiple video units. The video segment header is used to record the common information of the video data, and each video unit is divided by a synchronization header.

[0024] According to the relative time difference between the start play time of each video unit and the start play time of the entire channel data, a relative play time information is set for each video unit in each video segment header to record the time of each video unit Play relative time difference. In this way, the actual play time o...

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Abstract

This invention relates to one method for multi-media broadcast audio frequency play, which sets one initial play time section to express channel data initial time and comprises the following steps: cutting visual and audio frequency into multiple units; according to each initial play time and whole channel data initial play time difference, in each visual and audio section heads setting one relative play time section to record each visual and audio unit play relative time difference.

Description

technical field [0001] The invention relates to a method for synchronously playing real-time video and audio streams of mobile multimedia broadcasting, and belongs to the technical field of mobile multimedia broadcasting or mobile phone television. Background technique [0002] Mobile multimedia broadcasting is a multimedia playback technology that has emerged in recent years. With a handheld terminal, you can watch TV while moving at high speed. The terminal receives the program list through the wireless protocol, and can select the channel it has the right to watch, so that it can receive the multimedia data of the selected channel, and realize watching TV on the mobile terminal. [0003] The air data transmitted by the mobile multimedia broadcasting system is divided into different channels. The data of each channel includes three types: video, audio and data. It is required that the terminal can guarantee the synchronous playback of video and audio, that is, lip synchro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/72H04N7/62H04N5/067
Inventor 沈灿张建强
Owner ZTE CORP
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