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Image coding, decoding method and device

An image coding and coding technology, which is used in image communication, digital video signal modification, electrical components, etc., to achieve the effect of good data compression.

Active Publication Date: 2020-07-14
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The present invention provides an image encoding and decoding method and device to at least solve the problems caused by directly entropy encoding on the matching relationship parameters in the related art

Method used

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  • Image coding, decoding method and device
  • Image coding, decoding method and device
  • Image coding, decoding method and device

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Embodiment 1

[0159] The above value range is divided into K (usually 1

Embodiment 2

[0161] The above value range is divided into L (usually 1

Embodiment 3

[0163] One of the above-mentioned mappings or one of the inverse mappings within the above value range or the sub-value range is a combination of several (usually less than 4) consecutively executed partial mappings or partial inverse mappings.

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Abstract

The present invention provides an image encoding and decoding method and device, wherein the image encoding method includes: performing matching encoding on the pixels of the input video image to obtain one or more matching relationship parameters, wherein the matching relationship parameters are used to construct the image Parameters used in the process of predicting and / or restoring the pixel in the pixel; mapping the matching relationship parameters to obtain the mapping value of the matching relationship parameters; performing entropy encoding on the mapping value of the matching relationship parameters. The invention solves the problem caused by directly entropy coding on the matching relationship parameters in the related art, and further achieves better data compression effect of the entropy coding.

Description

technical field [0001] The present invention relates to digital video compression encoding and decoding, in particular to an image encoding and decoding method and device. Background technique [0002] The natural form of a digital video signal for images is a sequence of images. An image is usually a rectangular area composed of several pixels. If a digital video signal has 50 images per second, then a 30-minute digital video signal is a video image sequence consisting of 30x60x50=90000 images, sometimes referred to as for a video sequence or sequences. Encoding a digital video signal is encoding an image one by one. [0003] In the latest international video compression standard HEVC (High Efficiency Video Coding), when encoding an image, an image is divided into several sub-images of MxM pixels, called "Coding Unit (CU)" , with the CU as the basic coding unit, the sub-images are coded piece by piece. Commonly used M sizes are 4, 8, 16, 32, 64. Therefore, encoding a v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/91H04N19/182
CPCH04N19/593H04N19/517H04N19/91H04N19/134H04N19/85H04N19/157H04N19/182
Inventor 林涛李明尚国强吴钊
Owner TONGJI UNIV