Audio and visual frequencies synchronizing method for IP network conference

An IP network, video and audio technology, applied in the direction of video conferencing systems, color TV parts, TV system parts, etc., can solve the problem of unfavorable system stability and real-time performance, low stability and real-time performance, and receiving end Problems such as large data buffer, to achieve good transmission stability and real-time performance, save system costs, and play good effects

Active Publication Date: 2007-01-31
GUANGDONG VIMICRO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Second, the stability and real-time performance are not high
Because the audio and video data are packed into the same packet in the block-packed transmission method, each data packet is very large, which will generate a large amount of data. More packet loss, lateness and other problems are generated, which is not conducive to the stability and real-time performance of the system
[0018] Third, the data buffer at the receiving end must be large
This increases system cost

Method used

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The invention provides a video and audio synchronization method for an IP network conference. In order to overcome the problem that the sender’s sending thread is too busy and the network status is unstable, which affects data transmission, and at the same time avoids the problem that the system cost is too high to be unsuitable for ordinary users, the method is designed for Video data and audio data respectively construct data channels, and use separate threads in their respective data channels to perform data collection, compression, packaging, sending, receiving, unpacking, decompression and other processing. Moreover, during packet encoding, the audio data packet and the corresponding video data packet are encoded with the same serial number, so that at the receiving end, the audio and video data can be synchronously played ...

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Abstract

The method includes following steps: the data channels are separately built up for video data and audio data; in the data channel the separate thread is used to collect, compress, package, transmit, receive, unpackgae, uncompress the data. When coding and packaging, the audio data package and its relevant video data package are encoded with same sequence number so that at the reception end the audio and video data can be displayed according to sequence numbers; in the displaying procedure, when the video and audio data can not keep the consistent of sequence number, the sequence number of audio data is taken as norm.

Description

technical field [0001] The invention relates to a method for processing audio and video data in an IP network environment, in particular to a method for video and audio synchronization of an IP network conference. technical background [0002] With the development of computer and communication technology, multimedia communication technology has become a research hotspot. In this technology, how to correctly restore the time relationship between multiple media at the destination, that is, to achieve synchronization between media, has become one of the key technologies for realizing multimedia communication. [0003] In multimedia network communication, synchronization refers to the temporal relationship between all media objects in the system and within the media objects, which exists in a series of processes such as acquisition, storage, transmission and presentation of multimedia information. Stability, among which the synchronization problem in transmission is the most co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/04H04N7/15H04L12/18H04L29/06
Inventor 付群杨劲松施健标焉勇
Owner GUANGDONG VIMICRO
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