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Apparatus, system and method for synchronously playing video data and audio data

A technology for audio data and video data, applied in transmission systems, televisions, electrical components, etc., can solve the problems of long service acquisition time, large buffering time, long channel switching time, etc., to shorten channel switching time, reduce buffering time, The effect of simplifying the synchronization process

Inactive Publication Date: 2008-10-08
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In mobile multimedia broadcasting, using RTP to transmit media streams, there are some problems in realizing accurate synchronous playback of video and audio: 1) RTCP support is required, and the long RTCP packet cycle requires a long wait before synchronization, and the buffering time is long; The short RTCP cycle will cause too much overhead on channel bandwidth, and wireless channel bandwidth resources are very precious.
In mobile multimedia broadcasting, large buffering time not only means more storage resources are needed, but also means long service acquisition time and long channel switching time, which leads to poor user experience.

Method used

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  • Apparatus, system and method for synchronously playing video data and audio data
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  • Apparatus, system and method for synchronously playing video data and audio data

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Embodiment Construction

[0027] The main idea of ​​the present invention is to convert the time stamps of the multimedia data to be broadcasted on the multimedia broadcast front-end equipment, and convert the time stamps of each media stream into the time stamps under the unified time reference, and then the time stamps in the current time slice The media data of each media stream sent within is broadcast together with the converted time stamp.

[0028] After the terminal receives the media data and its time stamp of each media stream, it determines the playing time of one media data, calculates the time deviation of other media data relative to the media data according to the determined playing time, and proceeds sequentially from the first media data play.

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown, in the multimedia broadcast front-end equipment (such as the ori...

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Abstract

The invention discloses a device, a system and a method for synchronously playing video data and audio data. The system includes a front-end transmitting equipment and a terminal, wherein: the front-end transmitting equipment is used for transforming time stamp of the received media data to broadcasting time stamp under uniform time standard; broadcast-transmitting the media data needed to be transmitted in current time slice together with broadcasting time stamp of the media data; the terminal is used for determining broadcasting time of each media data according to time stamps.

Description

technical field [0001] The invention relates to the field of mobile multimedia broadcasting, in particular to a method for synchronously playing real-time video and audio streams of mobile multimedia broadcasting. Background technique [0002] In recent years, digital mobile multimedia broadcasting technologies and standards have developed rapidly, such as DVB-H (Digital Video Broadcasting Handheld Receiver: Digital Video Broadcast Handheld), MediaFLO (Media Single Forward Link: Media Forward Link Only) and CMMB (Mobile Multimedia Broadcasting: China Mobile Multimedia Broadcasting), etc. According to these technologies and standards, it is possible to watch TV on a mobile terminal. [0003] In order to reduce the power consumption of terminals, mobile multimedia broadcasting uses the time slice burst mode to send multimedia broadcasting services: a service occupies the entire bandwidth of the system alone in a small time slice (Time Slice) to transmit data at high speed, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/62H04L29/06
Inventor 童登金张建强林亚
Owner ZTE CORP
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