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Fast switch method of video sequence

A video sequence and fast switching technology, which is applied in the field of image information transmission and processing, can solve the problems of affecting image quality, coding efficiency reduction, low coding efficiency, etc., and achieve the goal of shortening switching time, fast video switching, and realizing video sequence switching Effect

Active Publication Date: 2011-01-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the coding efficiency of I frames is far lower than that of P frames or B frames, frequent insertion of I frames in the coded video stream will reduce the coding efficiency, thus affecting the image quality watched by users.

Method used

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  • Fast switch method of video sequence

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Experimental program
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Embodiment Construction

[0049] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] The method for quickly switching video sequences proposed by the present invention generally includes two parts: an encoding process of a video encoder and a decoding process of a video decoder.

[0051] 1. The encoding process of the video encoder.

[0052] In the first step, the video sequence to be coded is coded according to a standard video coding method. Video encoding can adopt methods such as H.261, H.263, H.264, AVS, MPEG4, MPEG2, etc. The type of encoded image frame can be I frame, P frame or B frame. In order to improve the encoding efficiency, adjacent I frames There can be arbitrarily large intervals in between.

[0053] In the second step, a switch frame is inserted into the standard coded video code stream.

[0054] refer to figure 2 As shown, in the process of video encoding, in addition to the standard intra-frame e...

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PUM

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Abstract

The invention discloses a fast switching method for video sequence, which includes the following steps: a switching frame is inserted inside a video bit stream during the encoding of the video sequence; when a video switching request and a switching frame are received during decoding the video sequence, the video decoding for the switching frame is conducted, and then a switching reference image is obtained; then the switching reference image is taken as a reference frame for decoding of subsequent video image. Without obviously decreasing the video encoding efficiency, the method of the invention realizes switching video fast on a decoder terminal, thereby shortening the switching time compared with the previous video switching according to frame I of the video sequence. At the same time, the invention also discloses a method of inserting a switching frame inside the video sequence and a switching method of video sequence.

Description

technical field [0001] The invention relates to a transmission and processing technology of image information, in particular to a method for fast switching of video sequences. Background technique [0002] With the development of wired broadband network and wireless network and the drive of user needs, multimedia technology and related applications have received more and more attention. In particular, digital video technology has been widely used, such as IPTV, mobile TV, digital TV, conference TV, laser video disc and so on. One of the common user operations is video switching, that is, the client switches from one currently playing video sequence to another video sequence. [0003] For digital video, because the existing digital video coding methods all adopt the way of image frame coding, the switching of video sequences cannot be completed quickly. These image frames include intra-coded frames (I frames) and non-intra-coded frames, wherein the non-intra-coded frames in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/24H04N19/52H04N19/573H04N19/593
Inventor 陈睿郭晓强宋立锋王宁于培松
Owner ZTE CORP