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Method and device for encoding and decoding reference frames

A decoding method and a technology of reference frames, which are applied in the field of video image processing, can solve the problems of high data correlation and large bit volume, and achieve the effects of improving coding efficiency, rich selection, and accurate prediction

Active Publication Date: 2019-11-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason for transform coding is: video image data often has a large data correlation in the spatial domain, resulting in the existence of a large amount of redundant information, and direct coding requires a large amount of bits

Method used

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  • Method and device for encoding and decoding reference frames
  • Method and device for encoding and decoding reference frames
  • Method and device for encoding and decoding reference frames

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0180] an acquisition module, configured to acquire a reference frame list, where the reference frame list includes candidate reference frames of the decoded and reconstructed first image frame;

[0181] A building module for adding the decoded and reconstructed first image frame and the second reference frame to the reference frame list, wherein the decoded and reconstructed first image frame and the second reference frame are are adjacent to each other in the reference frame list.

[0182] In a second feasible implementation manner, only the second reference frame generated in step S1005 is added to the reference frame list, and similarly, the decoded images that exceed the window will be removed.

Embodiment approach 2

[0184] an acquisition module, configured to acquire a reference frame list, where the reference frame list includes candidate reference frames of the decoded and reconstructed first image frame;

[0185] a building block for adding the second reference frame to the reference frame list.

[0186] In a third feasible implementation manner, according to the decoding method 1000, a plurality of reference frames generated in step S1005 are constructed based on a plurality of decoded and reconstructed image frames. In one embodiment, it may be assumed that according to the decoding method 1000, based on two decoded and reconstructed image frames, the first reference frame and the third reference frame, the reference frames generated in the two steps S1005, the second reference frame and the fourth reference frame, are constructed. reference frame. The first reference frame is generated before the third reference frame, and the same preset mapping function and mapping parameters are...

Embodiment approach 3

[0188] a first acquisition module, configured to acquire a third reference frame, where the third reference frame is a second image frame after decoding and reconstruction or a second interpolated image frame obtained by pixel interpolation of the second image frame;

[0189] a second obtaining module, configured to obtain, in the third reference frame, a third pixel unit having the mapping relationship with the fourth pixel unit of the fourth reference frame according to the mapping function after the undetermined coefficient is determined;

[0190] an assignment module, configured to assign the pixel value of the third pixel unit to the fourth pixel unit.

[0191] a third obtaining module, configured to obtain a reference frame list, where the reference frame list includes candidate reference frames of the decoded and reconstructed second image frame;

[0192] a calculation module, configured to add the pixel unit of the second reference frame and the pixel unit of the same po...

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Abstract

An embodiment of the present invention provides a decoding method for a reference frame, which is characterized in that it includes: acquiring a first reference frame, the first reference frame being the decoded and reconstructed first image frame or the first image frame passing through pixels Interpolating the first interpolated image frame obtained by interpolation; analyzing the mapping parameters in the code stream; determining the undetermined coefficients of the preset mapping function according to the mapping parameters; according to the mapping function after determining the undetermined coefficients, in the first reference In the frame, a first pixel unit that has a mapping relationship with a second pixel unit of a second reference frame is acquired; and a pixel value of the first pixel unit is assigned to the second pixel unit. The invention only transmits a small amount of mapping parameters at the frame level, enriches the selection of reference frames, makes the reference frames closer to actual frames, makes the prediction through the reference frames more accurate, and improves the coding efficiency.

Description

technical field [0001] The present invention relates to the field of video image processing, and in particular, to a method and device for encoding and decoding reference frames. Background technique [0002] Digital video capabilities can be incorporated into a wide range of devices, including digital televisions, digital broadcast systems, wireless broadcasting systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, e-book readers, digital Cameras, digital recording devices, digital media players, video game devices, video game consoles, cellular or satellite radio telephones, video conferencing devices, video streaming devices, and the like. Digital video devices implement video compression techniques such as those provided by MPEG-2, MPEG-4, ITU-TH.263, ITU-TH.264 / MPEG-4 Part 10 Advanced Video Codec (AVC), ITU-TH.265 High A standard defined by the Efficiency Video Codec (HEVC) standard and those video compression techniques described ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/44H04N19/51H04N19/573
CPCH04N7/24H04N19/51H04N19/513H04N19/593H04N19/537H04N19/105H04N19/172H04N19/59
Inventor 林四新张翔马思伟杨海涛
Owner HUAWEI TECH CO LTD