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A method and device for generating side information

A side information and key frame technology, applied in the field of side information generation methods and devices, can solve the problems of motion vector deviation and low accuracy of side information, and achieve the effect of high accuracy

Active Publication Date: 2018-06-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of realizing the present invention, the inventors found that the side information obtained by the general side information generation method will cause deviations in the motion vectors of many blocks in the obtained side information frame
Therefore, the accuracy of side information is not high

Method used

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  • A method and device for generating side information
  • A method and device for generating side information
  • A method and device for generating side information

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Embodiment Construction

[0047] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0048] In distributed video coding, a video sequence X consists of odd frames X 2k±1 (k is an integer) and even frame X 2k (k is an integer) composition. In the present invention, it is assumed that odd-numbered frames are key frames, and even-numbered frames are WZ frames (interpolation frames). It can also be assumed that even frames are key frames, and odd frames are WZ frames. It is only necessary to ensure that there are key frames before and after the WZ frame. Then the side information is mainly through the time domain adjacent key frame X 2k±1 Generated by motion compensated interpolation.

[0049] like figure 1 As shown, the side information generation method of the present invention includes:

[0050] Step 11. Obtain key frames adjacent i...

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Abstract

The invention belongs to the technical field of image processing, and discloses a method and device for generating side information, so as to improve the accuracy of generated side information. A method for generating side information, comprising: acquiring key frames adjacent to each other in time domain in a video image output by an encoding end, wherein the key frames are acquired based on human eye features in the image, and in the two adjacent key frames There is an interpolation frame in the middle of the key frame; the forward motion vectors of two adjacent key frames in the key frame are obtained; for any interpolation frame, according to the information of the interpolation frame and the forward motion of the relevant key frame of the interpolation frame Vector motion compensation is performed to generate side information.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method and device for generating side information. Background technique [0002] The distributed video coding framework is a new asymmetric video compression framework. The system independently encodes each video frame at the encoding end, that is, intra-frame coding, and jointly decodes each video frame at the decoding end, that is, inter-frame decoding. . [0003] In a distributed video coding system, information obtained through lossy source coding (Wyner-Ziv coding) is called main information, and side information (Side information) is an estimate of the main information generated at the decoding end. The side information helps the decoder in the decoding process of the main information, and assists the decoder in decoding. [0004] The most effective way for the system to obtain excellent rate-distortion performance and compression efficiency is to make the generated side i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/154H04N19/80H04N19/513H04N19/56
Inventor 程德强姜海龙王睿李硕郭星歌郑珍
Owner CHINA UNIV OF MINING & TECH