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Image prediction method and device and codec

A prediction device and prediction method technology, applied in the field of video coding and decoding, can solve the problems of many processes, low accuracy and high complexity

Active Publication Date: 2019-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Several existing inter-frame prediction modes, such as merge mode (Merge mode), skip mode (Skip mode) and advanced motion vector prediction mode (AMVP mode) , but the traditional image prediction method has many processes, high complexity and low accuracy

Method used

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  • Image prediction method and device and codec
  • Image prediction method and device and codec

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Embodiment Construction

[0048] The technical solution in this application will be described below with reference to the accompanying drawings.

[0049] The image prediction method in this application can be applied to the technical field of video coding and decoding. In order to better understand the image prediction method of the present application, the video codec is firstly introduced below.

[0050] A video generally consists of many frames of images in a certain order. Generally speaking, there is a lot of repetitive information (redundant information) in a frame of images or between different frames of images. For example, there is often a lot of space in a frame of images. Where the structure is the same or similar, that is to say, there is a large amount of spatial redundant information in the video file. In addition, there is a large amount of time redundant information in the video file, which is caused by the composition structure of the video. For example, the frame rate of video sampl...

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Abstract

The invention provides an image prediction method, and the method comprises the steps: obtaining the initial prediction motion information of a current image block, determining a first reference blockin a forward reference image, determining a second reference block in a backward reference image; searching around the first reference block and the second reference block through a brand-new mirrorimage-like method, determining whether a pair of target reference blocks with lower image block matching cost exists or not, and the pair of target reference blocks has a corresponding relation in space; and obtaining a pixel prediction value of the current image block according to the pixel value of the target reference block under the first precision, and the pixel prediction value of the current image block having code stream precision. Through the method and the device, image block matching cost calculation is carried out under a high-precision condition, and the optimal reference block pair is found, so that the complexity of video image inter-frame prediction in the prior art is reduced, and the accuracy is improved.

Description

technical field [0001] The present application relates to the technical field of video coding and decoding, and in particular to a method and device for inter-frame prediction of video images, as well as a corresponding encoder and decoder. Background technique [0002] Digital video capabilities can be incorporated into a wide variety of devices, including digital television, digital broadcast systems, wireless broadcast systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, electronic book readers, Digital cameras, digital recording devices, digital media players, video game devices, video game consoles, cellular or satellite radiotelephones (so-called "smart phones"), video teleconferencing devices, video streaming devices and the like . Digital video devices implement video compression techniques such as those defined in MPEG-2, MPEG-4, ITU-T H.263, ITU-T H.264 / MPEG-4 Part 10 Advanced Video Coding (AVC), Video compression techniques...

Claims

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Application Information

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IPC IPC(8): H04N19/503H04N19/176H04N19/52H04N19/513H04N19/523
CPCH04N19/503H04N19/176H04N19/52H04N19/513H04N19/523H04N19/139
Inventor 高山马祥陈焕浜杨海涛
Owner HUAWEI TECH CO LTD
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