Unlock instant, AI-driven research and patent intelligence for your innovation.

Adaptive loop filtering method and device

An adaptive loop and filtering device technology, applied in the field of video image encoding and decoding, can solve the problems of different, restricted ALF filtering effects, the difference between the bit rate of a frame image and the peak signal-to-noise ratio pnsr value, etc., and achieve the improvement of filtering performance Effect

Active Publication Date: 2020-01-03
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, different filtering region index tables RegionTable will cause the previous regions to be different when regions are merged, resulting in different bit rates and peak signal-to-noise ratio pnsr values ​​of the final frame of images.
[0009] However, the HEVC / H.265 and AVS2 standards use this single filter region index table for different image frames, which does not consider the image characteristics of specific images, thus restricting the ALF filtering effect

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
  • Adaptive loop filtering method and device
  • Adaptive loop filtering method and device
  • Adaptive loop filtering method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Hereinafter, the principle and spirit of the present invention will be described with reference to several exemplary embodiments in conjunction with the accompanying drawings. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way.

[0031] In the HEVC / H.265 standard, an image is divided into a basic coding unit for encoding, that is, a largest coding unit (LCU), for example, 64×64 pixels. According to the different encoding processes, the LCU is divided into three parts, namely coding unit (CU), prediction unit (PU) and transform unit (TU).

[0032] The HEVC / H.265 standard also adopts intra-frame prediction and inter-frame prediction technology, in which the spatial and temporal redundancy of the video signal is used to achieve the purpose of information compression: when compressing the current coding un...

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 embodiment of the invention discloses an adaptive loop filtering method and an apparatus used for coding and decoding of video images. The adaptive loop filtering method used for image coding includes: dividing a reconstruction image into a plurality of filtering areas; performing filtering area merging of the plurality of filtering areas according to at least two filtering area index tables, and calculating the rate distortion cost of each filtering area index table; comparing the at least two calculated rate distortion costs of the filtering area index tables; selecting the filtering area index table with the lowest rate distortion cost in the at least two filtering area index tables as the final filtering area index table for adaptive loop filtering of the reconstruction image; and encoding the code of the final filtering area index table or the final filtering area index table into a video image stream. According to the method and the apparatus, the adaptive loop filtering performance can be enhanced according to characteristics of different images.

Description

technical field [0001] The invention relates to the technical field of video image encoding and decoding, in particular to an improved adaptive loop filtering method and an adaptive loop filtering device in video image encoding and decoding. Background technique [0002] Modern video codecs use block-based prediction and quantized block transforms. Generally, the current coding frame is divided into non-overlapping coding units. This coding unit can be a macro in AVC / H.264 (Motion Picture Experts Group Advanced Video Coding MPEG-4AVC) or AVS1 (Domestic Video Coding Standard Version 1) A block (MB, macro block) can also be a coding unit (CU, coding unit) in HEVC / H.265 (High Efficiency Video Coding; high-efficiency video codec) or AVS2 (Domestic Video Coding Standard Version 2). A coding unit can be further sub-divided into coding sub-units. With block-based prediction, the reconstructed pixel blocks (or regions) can be used to predict other pixel blocks. The use of block-b...

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): H04N19/82H04N19/61H04N19/147H04N19/13H04N19/91H04N19/124
Inventor 胡建华夏昌盛旷开智张韵东昝劲文
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD