Method and system for switching interactive TV channels and method and device for sending audio and video streams

Abstract

The invention discloses a method for sending audio and video streams in switching interactive TV channels. The method comprises the following steps: establishing synchronous association between videostreams and audio streams; after a request for switching the channels is received, selecting an I video frame; issuing data of the I video frame; searching an audio frame associated with the I video frame according to the synchronous association between the video streams and the audio streams; issuing the audio frame associated with the I video frame; and then sequentially issuing an audio frame associated with the next video frame. The embodiment of the invention shortens the channel switching delay caused by non-synchronization in sending audio data and video data, and has good compatibilitywith the prior network because the whole switching operation is only performed between a cache server and a receiving terminal without the involvement of a third part. The invention also discloses adevice for sending the audio and video streams in switching the interactive TV channels, and a method and a system for switching the interactive TV channels.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for switching channels of an interactive TV, and a method and device for sending audio and video streams. Background technique [0002] As an important form of "integration of three networks", the interactive service has become the key business direction of the development of the communication industry, and the scale of its end users is expanding rapidly. The main business form of interactive TV is to provide users with audio and video services such as live broadcast, on-demand, recorded broadcast, time-shifting, and other value-added multimedia services based on IP networks through receiving terminals. Despite the emergence of a large number of derivative services, basic audio and video services are still the most widely used interactive services. Therefore, improving the user experience of basic audio and video services is the key to improving interac...

AI Technical Summary

Problems solved by technology

[0005] However, in the process of implementing the present invention, the inventor found that at least the following problems existed in the prior art: the audio and video of the encoder output code stream were not synchronized, so the receiving terminal needed to start playing after restoring the audio and video synchronization.

In the worst case, the audio and video packets with the same PTS may differ by 1.5 seconds during transmission, which is another major factor limiting the speed of interactive TV channel switching

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