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

Image encoding and decoding method and device

An image coding and coding technology, applied in the field of image coding and decoding methods and devices, can solve the problems of low compression efficiency, small correlation, long distance, etc.

Active Publication Date: 2020-02-14
TONGJI UNIV +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The present invention provides an image encoding and decoding method and device to at least solve the problem of the relative distance between the positions of these reconstructed pixels for obtaining predicted values ​​and the current block, the correlation between them is small, and the compression efficiency is relatively small. low problem

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
  • Image encoding and decoding method and device
  • Image encoding and decoding method and device
  • Image encoding and decoding method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0234] The method of generating the predictive value includes at least the following steps: according to a predetermined rule, selecting a reconstructed pixel sample value or its variant outside the codec block as a predictive value, or selecting the pixel value representing the pixel set or Its variants are used as predictors. In a codec block, part or all of the current pixel samples use the reconstructed pixel samples outside the codec block or its variants as prediction values, and part or all of the current pixel samples use the representative pixel set Pixel values ​​or variants thereof are used as predictors. The variants include, but are not limited to, filtering and transforming.

Embodiment 2

[0236] The method of generating the predicted value at least includes determining the predicted value according to at least some or all of the following parameters or a combination:

[0237] 1) The position of the reconstructed pixel sample value outside the codec block in the current image; the position is usually specified by a displacement vector (also called a moving vector or a copy position, etc.);

[0238]2) the value of the reconstructed pixel sample value outside the codec block; the reconstructed pixel sample value is usually specified by a displacement vector (also called a moving vector or a copy position, etc.);

[0239] 3) the numerical value of the representative pixel sample value of the codec block;

[0240] 4) Construction of the representative pixel set of the codec block;

[0241] 5) The number of pixels representing the pixel set of the codec block;

[0242] 6) the position of the current codec pixel sample value in the codec block;

[0243] 7) Select a...

Embodiment 3

[0246] For a current pixel sample value of the codec block, the method for generating the predicted value includes at least the following steps:

[0247] For a reconstructed pixel sample value outside the codec block, calculate the distance between the reconstructed pixel sample value and some or all representative pixel sample values ​​of the representative pixel set, and determine an optimum distance The representative pixel sample value of is called the optimal representative pixel sample value;

[0248] If the distance between the optimal representative pixel sample value and the reconstructed pixel sample value satisfies a predetermined condition, then select the numerical value of the optimal representative pixel sample value as the prediction value; otherwise, select the reconstructed pixel sample value The numerical value of the sample value is used as the predicted value.

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 present invention provides an image encoding and decoding method and device, wherein the encoding method includes: constructing a representative pixel set of a coding block, determining information required for constructing the representative pixel set, and constructing a predicted value of a pixel sample value in the coding block , the generation method of the predicted value includes: according to the reconstructed pixel sample value of the image area outside the coding block and the pixel value of the representative pixel set, constructing the predicted value of the pixel sample value, and constructing the representative pixel set required The information and the information required to construct the prediction value are encoded and written into the video stream. Using the above technical solution, the distance between the position of these reconstructed pixels for obtaining the predicted value and the current block is relatively long, the correlation is small, and the problem of low compression efficiency is solved, and the predicted value from the image area outside the current block is improved. The correlation with the current pixel sample value effectively improves the compression efficiency.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to an image encoding and decoding method and device. Background technique [0002] In related technologies, as TVs and monitors enter ultra-high-definition (4K) and ultra-high-definition (8K) resolutions, and the development and popularization of a new generation of cloud computing and information processing models and platforms with remote desktops as a typical form , the demand for video image data compression is also moving towards higher resolution and composite images that include images captured by cameras and images on computer screens. It has become an indispensable technology to perform ultra-high compression ratio and extremely high-quality data compression on video images. [0003] Make full use of the characteristics of 4K / 8K images and computer screen images to compress video images with high efficiency. It is also the latest international video compression stan...

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): H04N19/182H04N19/176H04N19/70
CPCH04N19/176H04N19/182H04N19/70H04N19/105H04N19/136H04N19/593H04N19/59
Inventor 林涛李明尚国强吴钊
Owner TONGJI UNIV