Motion-vector-based H.264 baseline profile intra mode decision method

A technology of motion vector and intra-frame mode, applied in the field of multimedia video coding

Inactive Publication Date: 2011-09-14
BEIHANG UNIV
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prediction mode selection is to select the optimal mode ...

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
  • Motion-vector-based H.264 baseline profile intra mode decision method
  • Motion-vector-based H.264 baseline profile intra mode decision method
  • Motion-vector-based H.264 baseline profile intra mode decision method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the algorithm flow of the H.264 reference code JM8.6 for modifying intra-frame mode selection according to the present invention will be further described below in conjunction with the accompanying drawings.

[0052] The present invention provides a fast intra-frame mode selection algorithm. The algorithm achieves the purpose of reducing algorithm complexity by reducing intra-frame prediction candidate modes with the help of inter-frame motion vectors. The specific algorithm flow is according to the appended Figure 4 shown.

[0053] When the encoding process starts, first read in a frame of data, judge whether the frame is an I frame or a P frame, and then encode according to different frame types. In the case of an I-frame, traditional intra-frame prediction coding is performed on each macroblock in the frame, that is, the traversal RDO operation is performed on all intra...

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 provides a motion-vector-based H.264 baseline profile intra mode decision method. The method comprises the following steps: 1) an I frame or P frame is judged, wherein traditional intra prediction coding is performed under an I frame condition, and mode information contained in a current macroblock is written into a reference mode table after the coding is completed; 2) under a P frame condition, a coder performs interframe prediction to obtain the best motion vector, and acquires reference mode information of the current macroblock and the reference mode information containing sub-blocks by searching the reference mode table according to the motion vector; and 3) intra prediction of 16*16 and 4*4, a candidate prediction mode is determined according to the reference mode information of each sub-block, rate-distortion optimization operation is performed on the candidate prediction mode to obtain an optimal intra prediction mode. By the method, the intra mode decision algorithm is simplified under a condition that the influence to coding a signal-to-noise rate is small, and the coding speed is accelerated.

Description

(1) Technical field [0001] The invention relates to the field of multimedia video coding, in particular to an intra-frame prediction mode selection algorithm for the basic level of the H.264 standard. It can ensure that the intra-frame prediction process is accelerated and the encoding speed is improved under the condition that the signal-to-noise ratio of the encoding output is basically unchanged. (2) Background technology [0002] H.264 is a video coding standard developed by the Joint Video Team (JVT / Joint Video Team) of VCEG (Video Coding Experts Group) of ITU-T and MPEG (Moving Picture Experts Group) of ISO / IEC. It is equivalent to the tenth part of ISO's MPEG-4, officially approved in May 2003. Compared with traditional video coding methods, the H.264 standard has higher coding efficiency and algorithm complexity. [0003] The H.264 standard defines three profiles, the Baseline profile, the Main profile and the Extended profile. The Basic profile supports I frames a...

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
IPC IPC(8): H04N7/26H04N7/50H04N19/11H04N19/147
Inventor 毛峡闫晗
Owner BEIHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap