Multimedia stream synchronization caching method and system

A technology of multimedia streaming and media streaming, which is applied in broadcast characteristic identification/recognition, pulse modulation TV signal transmission, and broadcast service distribution, etc. Effects of channel change time, improved user experience, and simplified sync processing

Inactive Publication Date: 2011-09-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The TS protocol is one of the MPEG (Moving Picture Expert Group, Moving Picture Experts Group) standards. It transmits video and audio in a fixed 188-byte packet, which is distinguished by the PID (Program Identifier) ​​field. Video and audio, which can support the transmission of video and audio in a TS stream; however, each packet in the TS mode is small, and the terminal needs hierarchical analysis. In order to obtain a complete audio and video frame, a large number of TS packets need to be buffered, and the video and audio The relative playback time is uncertain, and it is also difficult to determine the synchronization cache for video and audio

Method used

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  • Multimedia stream synchronization caching method and system
  • Multimedia stream synchronization caching method and system
  • Multimedia stream synchronization caching method and system

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Embodiment Construction

[0042] The technical solution of the present invention will be described in more detail below in conjunction with accompanying drawings and embodiments:

[0043] The present invention provides a system for synchronous buffering of multimedia streams, such as figure 1 As shown, it includes the mobile multimedia broadcasting system sending end device and receiving end device. The sending end device includes a video and audio unit selection module, an encapsulation module and a media frame sending module, and the receiving end device includes a media frame receiving module, a video and audio synchronization buffer module, and an analysis module. module, and video and audio playback module; where

[0044] The video and audio unit selection module is used to receive the data input stream, and take the media unit of each media stream to be broadcast in the current time slice period and the play time in the same play time interval with a smaller time slice cycle, and send it to Enca...

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Abstract

The invention relates to a synchronous caching method and system for a multimedia flow. The method comprises the following steps: a transmitting end device receives a plurality of inputted media flows, picks up media data of each media flow that needs to be broadcasted in the current timeslice period with the playing times in the same playing time area, and the media data is transmitted to a receiving end device from a broadcast channel after being sealed together with the corresponding play time information. The receiving end device calculates the largest caching space needed by the media data of each media flow according to the program bandwidth and the timeslice period, distributes a cache with a pointed size, synchronously caches the media flows transmitted by the transmitting end device, obtains the media data of each media flow and the corresponding play time information thereof from the media flows, and synchronously plays the media data of each media flow according to a time sequence. The method and system of the invention can be adopted to simplify the synchronous treatments of video and audio at the receiving end, reduce the caching time of the receiving end caused by synchronization, shorten the channel switching time and improve the user experience.

Description

technical field [0001] The invention relates to the technical field of mobile multimedia broadcasting or mobile phone television, in particular to a method and system for synchronous buffering of video and audio in mobile multimedia broadcasting. Background technique [0002] In recent years, digital mobile multimedia broadcasting technologies and standards have developed rapidly, such as DVB-H (DigitalVideo Broadcast Handheld, digital video broadcasting handheld reception), MediaFLO (MediaForward Link Only, media single forward link) and CMMB (China Mobile MultimediaBroadcasting, 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 the terminal, mobile multimedia broadcasting uses the time slice burst mode to send multimedia broadcasting services: one service occupies the entire bandwidth of the system in a small time slice to transmit data ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04H60/38H04W4/06H04N7/52
Inventor 刘志强张建强彭铭
Owner ZTE CORP
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