Loop filtering method in image coding processing

A technology of loop filtering and image coding, which is applied in the field of image coding processing, and can solve problems such as single filter operator, difficulty in achieving filtering effect, and high-intensity smoothing filtering in uneven areas.

Active Publication Date: 2006-11-22
HUAWEI TECH CO LTD
View PDF0 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] It can be seen that the above-mentioned existing loop filtering process ignores the fact that the block effect is easier to be perceived by the human eye in the flat area, so it does not perform high-intensity smoothing filtering for the flat

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
  • Loop filtering method in image coding processing
  • Loop filtering method in image coding processing
  • Loop filtering method in image coding processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] The purpose of the present invention is to provide a loop filtering method, which can effectively remove the block effect, so that the subjective quality of the decoded image is improved, objectively, the peak signal-to-noise ratio is improved, and the code rate is reduced.

[0081] The specific implementation of the method provided by the present invention will be described below with reference to the accompanying drawings, wherein the encoding block boundary is an 8×8 block boundary, and the method is similar for the case of a 4×4 block boundary. like figure 2 As shown, it specifically includes the following processing procedures:

[0082] First, the block effect value strength needs to be calculated;

[0083] Step 21: Count the number num of similar points in the block boundary area;

[0084] The so-called similar points are points whose pixel value difference is less than a predetermined value, and the predetermined value can be set values ​​such as 2, 3, etc., a...

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 relates to a loop filter method used in image code process. Wherein, it comprises: first, calculating the number of similar points in the margin of filtered code block, and according to said number and if there is frame internal block, to decide the block effective value of said code block; then according o the pixel difference between two sides of block margin, judging if the block margin is the real edge of picture; at last, processing filter treatment on the code block according to the block effective value, when it is false edge. The invention improves the flat area filtration, to obtain better effect on the block removal effect of flat area.

Description

technical field [0001] The present invention relates to the technical field of image coding processing, in particular to a loop filtering method in image coding processing. Background technique [0002] With the development of multimedia technology and the rapid promotion of multimedia applications, the H.264 video image compression standard formulated by JVT, a standard formulation working group jointly formed by MPEG and ITU, is characterized by its advanced technical characteristics and better compression It has been widely used in conference TV, videophone, streaming media, HD DVD, video surveillance, digital TV, 3G and other fields. [0003] H.264 compression processing framework such as figure 1 As shown, the basic processing unit is 16×16 macroblock, which adopts multi-frame reference, intra-frame prediction, multi-macroblock mode, 4×4 integer transformation and quantization, loop filtering, 1 / 4 pixel motion prediction, CAVLC ( Context-based variable length coding 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): H04N7/26
CPCH04N19/527H04N19/107H04N19/117H04N19/176H04N19/61H04N19/82
Inventor 熊联欢徐士麟喻莉朱光喜
Owner HUAWEI TECH CO LTD
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