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Decoding switch method of video sequence

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

Inactive Publication Date: 2008-05-21
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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  • Decoding switch method of video sequence
  • Decoding switch method of video sequence
  • Decoding switch method of video sequence

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Experimental program
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Embodiment Construction

[0034] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] The switching of the video sequence of the present invention generally includes two parts: the encoding process of the video encoder and the decoding process of the video decoder.

[0036] 1. The encoding process of the video encoder.

[0037] 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.

[0038] In the second step, a switch frame is inserted into the standard coded video code stream.

[0039] refer to figure 2 As shown, in the process of video encoding, in addition to the standard intra-frame encoded image fr...

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Abstract

The invention publishes a video sequence decode switching method, steps are as follows: when receiving a video switching request and switched frame, process video decode of the switched frame, and get the decode image of the switched frame; restore the decode image in accordance with the zoom coefficient; get the switch reference frame; take the switch reference frame as the reference frame of the follow-up video image decode. The invention can realize rapidly video switching at the decoder without obviously reducing the video coding efficiency; and compared with the intrinsic video switching according the video sequence of I-frame, the switching time of the invention is shortened.

Description

technical field [0001] The invention relates to a transmission and processing technology of image information, in particular to a method for decoding and switching 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 fram...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/24H04N19/102
Inventor 陈睿郭晓强宋立锋王宁于培松
Owner ZTE CORP