A Quality Scalable Video Coding Method Based on Mean Square Error Threshold

A mean square error and video coding technology, applied in the field of video coding, can solve the problem of high complexity of quality scalable video coding algorithms, achieve excellent clustering performance, improve compression performance, and reduce complexity.

Active Publication Date: 2018-06-22
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0004] The present invention aims to solve the problem of high complexity of the existing quality-scalable video coding algorithm, and provides a quality-scalable video coding method based on the mean square error threshold

Method used

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Embodiment Construction

[0034] A quality scalable video coding method based on the mean square error threshold, which uses a two-layer coding method. First, the video image is divided into blocks, and a feature pattern library with a larger size pattern vector is used for coding the base layer; then for The image blocks with larger mean square error are further segmented, and these segmented image blocks are encoded by using a feature pattern library with a smaller size pattern vector to form an enhancement layer. Specific steps are as follows:

[0035] Step 1. The base layer feature pattern library is generated. Each frame image of the video to be encoded is divided into blocks with a specified large size, and the obtained image blocks are used as a training vector set and trained by self-organizing mapping method to obtain a base layer feature pattern library.

[0036] Step 1.1, decompose the video to be encoded into images frame by frame, and then divide all images into 16×16 image blocks to form...

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Abstract

The invention discloses a quality scalable video coding method based on mean square error threshold. In the method, by making use of influence of difference of size of pattern vectors on quality of a reconstructed image, different quality layers are coded through characteristic pattern bases with pattern vectors of different size, and thus, scalability of video quality is realized. Firstly, a video image is segmented into blocks, and a base layer is coded through the characteristic pattern base with greater pattern vectors; by comparison with the mean square error threshold, the image blocks with greater mean square error are further segmented, and the segmented image blocks are coded through the characteristic pattern base with smaller pattern vectors so as to form an enhancement layer. The method provided by the invention only need to search and match an optimal pattern vector for the image blocks, and further codes an index, thus, the existing very complex intra-frame predicdion, inter-frame prediction and inter-layer prediction are abandoned, complexity is reduced greatly, and compression performance is improved.

Description

technical field [0001] The invention relates to the field of video coding, in particular to a quality scalable video coding method based on a mean square error threshold. Background technique [0002] The development of Internet, intelligent terminal and wireless broadband communication technology has greatly promoted the rapid growth of various video applications. Since different smart terminals have different resolutions and decoding capabilities, the transmission bandwidths of different networks are also different. In order to adapt to different video application requirements, scalable video coding technology needs to be adopted. Currently, a relatively mature scalable video coding standard is H.264 / SVC. Scalable video coding technology mainly includes time-scalable, spatial-scalable and quality-scalable. Among them, the quality scalable coding is mainly divided into coarse-grained quality scalable, intermediate granularity quality scalable and fine-grained quality sca...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/33H04N19/176
Inventor 黎洪松艾新宇
Owner GUILIN UNIV OF ELECTRONIC TECH
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