Method for switching digital channel and device for processing digital video

Abstract

The invention discloses a digital channel switching method comprising the following steps: video data provided by a channel next to a playing channel is received, and video data of at least one video data internal frame in the channel next to the playing channel is stored in a pre-buffer; and when the playing channel is switched for the next channel, the video data of at least one video data internal frame in the channel next to the playing channel is removed from the pre-buffer, and is decoded for playing. Meanwhile, the invention further discloses a digital video processing device. By adopting the method and the digital video processing device which are provided by the invention, the purpose of saving the time of establishing conversation with a network-side television server, standing by for the release of coded data and waiting for the internal frame can be achieved while switching channels, so that the invention can achieve the effects of accelerating the channel switching speed and improving of the comfort level of a user's experience.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a digital channel switching method and a digital video processing device. Background technique [0002] At present, in digital video broadcasting (Digital Video Broadcast, DVB) systems, video encoding formats mostly adopt MPEG-2 format, and in IP-based television service systems (Internet Protocol Television, IPTV) services, mostly adopt MPEG-2 format, or MPEG- 4 format, or H.264 format, in these source coding algorithms, video images are basically compressed in three ways. These formats include intra-frame compression, that is, all the information in this frame is used for compression, and the resulting compressed frame is called an I frame; or inter-frame compression, not only using the information in this frame, but also using the information of adjacent frames to compress, by The resulting compressed frame is called a P frame; or the adjacent frame is used for bidirectio...

AI Technical Summary

Problems solved by technology

In order to reduce the code stream, the period of the I frame is a fixed compromise value, generally 2 seconds, so when the video terminal is playing a live program, it must wait for an I frame to start decoding after switching to a new channel. In the IPTV system , the connection time between the terminal and the server, the time for demultiplexing, the time for waiting for the I frame, and the buffering time occupy a large part of the total time for channel switching, resulting in an unsatisfactory effect when switching channels and failing to achieve fast switching. Purpose

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