Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Audio-video-coding-standard (AVS)-based intra-frame prediction method

A technology of intra-frame prediction and intra-frame prediction mode, which is applied in television, electrical components, image communication, etc., and can solve the problem of not fully considering the texture direction information of the encoded image

Inactive Publication Date: 2013-06-19
WUHAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only adds a small amount of computational complexity, but does not fully consider the rich texture direction information of the encoded image

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio-video-coding-standard (AVS)-based intra-frame prediction method
  • Audio-video-coding-standard (AVS)-based intra-frame prediction method
  • Audio-video-coding-standard (AVS)-based intra-frame prediction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] An AVS-based intra-frame prediction method. The AVS standard adopts the transform and quantization technology based on 8×8 sub-blocks. The minimum processing unit in the AVS standard is 8×8 sub-blocks, and the upper macroblocks are respectively defined for 8×8 sub-blocks. , left macroblock, upper left macroblock, UL subblock, UR subblock, BL subblock, BR subblock; and define the coded pixels in the upper macroblock adjacent to the current coding block as H(i) where i=0,1,...,n, the decoded pixel in the left macroblock adjacent to the current coding block is marked as V(j) where j=0,1,...,n, and the current coding block The decoded pixels in the adjacent upper left macroblock are marked as P 0 , the 8 decoded pixels adjacent to the BR sub-block and the UR sub-block to be encoded are marked as a, b, ..., h, and the BR sub-block, UR sub-block and the adjacent BL sub-block to be encoded 16 decoded pixels are labeled a 0 ,b 0 ,...,h 0 i 0 ,j 0 ,...,o 0 ,p, the decoded...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a novel audio-video-coding-standard (AVS)-based two-way intra-frame prediction method. In the novel two-way intra-frame prediction method, the weighted sum of pixel values calculated by any two intra-frame prediction modes in an AVS is calculated to obtain final two-way intra-frame predicted pixel values. The method comprises the following steps of: first adding a reverse scanning sequence on the basis of AVS raster scanning; then adding the intra-frame prediction modes corresponding to reverse scanning, and calculating the weighted sum of any two of the newly added intra-frame prediction modes corresponding to the reverse scanning to obtain the two-way intra-frame predicted pixel values corresponding to the reverse scanning; and finally selecting an optimal intra-frame prediction mode from all intra-frame prediction and two-way intra-frame prediction modes corresponding to the raster scanning and the reverse scanning by utilizing a sum of absolute errors (SAE)standard. By the novel two-way intra-frame prediction method provided by the invention, coding performance is further improved, and the shortcomings of relatively fewer intra-frame prediction modes and relatively lower prediction efficiency in the AVS are overcome.

Description

technical field [0001] The present invention relates to an intra-frame prediction method, in particular to an AVS-based intra-frame prediction method. Background technique [0002] AVS (Audio Video coding Standard) is the first advanced audio and video codec technology standard independently formulated by my country. AVS1-P2 is the video part of the AVS standard. It was officially approved as a national standard in 2006. The main technologies of the AVS1-P2 standard to improve coding efficiency include: 8×8 integer transformation, quantization, intra-frame prediction, and 1 / 4-precision pixel interpolation , inter-frame prediction motion compensation, entropy coding, deblocking in-loop filtering, etc. Intra prediction uses the decoded pixels in the adjacent blocks of the current coding block to predict each pixel of the current coding block, so as to eliminate the redundancy in the image space, and is one of the most important technical means to improve the coding efficiency...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/11H04N19/159H04N19/593
Inventor 胡瑞敏钟睿苏妮王中元侯志强渠慎明胡金晖黄震坤
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com