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Affine Prediction Method and Related Devices

A prediction method and prediction value technology, applied in the field of video coding and decoding, can solve the problem of high computational complexity and achieve the effect of reducing computational complexity

Active Publication Date: 2021-07-13
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In an affine prediction method, the calculation of the predicted values ​​of all pixels in the current coding block mainly includes the steps of calculating the initial predicted value, calculating the pixel compensation value, and calculating the final predicted value through the initial predicted value and the pixel compensation value. The computational complexity of the prediction method is high

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  • Affine Prediction Method and Related Devices
  • Affine Prediction Method and Related Devices
  • Affine Prediction Method and Related Devices

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Embodiment Construction

[0017] In order to enable those skilled in the art to better understand the technical solutions of the present application, the affine prediction method and related devices provided in the present application will be further described in detail below with reference to the drawings and specific implementation methods.

[0018] For details, please refer to figure 1 , figure 1 is a schematic flowchart of the first embodiment of the affine prediction method of the present application. The affine prediction method in this embodiment includes the following steps.

[0019] S101: Divide the current coding block into multiple sub-blocks, and determine the initial prediction values ​​of all pixels in each sub-block.

[0020] The current encoding block is an image block to be encoded in the current frame, and the current frame is encoded sequentially in the form of image blocks in a certain order, and the current encoding block is an image block to be encoded at the next moment in the ...

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Abstract

The present application provides an affine prediction method and related devices. The affine prediction method includes: dividing the current coding block into multiple sub-blocks, determining the initial prediction values ​​of all pixels in each sub-block; dividing each sub-block into multiple sub-blocks, wherein at least one sub-block contains at least two An integer pixel point; determine the motion vector difference and gradient of each block; calculate the pixel compensation value of each block based on the motion vector difference and gradient; use the pixel compensation value of each block as each block The pixel compensation values ​​of all pixels in , and calculate the final prediction value of each pixel in the current coding block through the initial prediction value and pixel compensation value of each pixel. The method of the present application can reduce the computational complexity of inter-frame prediction.

Description

technical field [0001] The present application relates to the technical field of video coding and decoding, in particular to an affine prediction method and related devices. Background technique [0002] Because the amount of video image data is relatively large, it usually needs to be encoded and compressed before being transmitted or stored. The encoded data is called a video stream. Limited by hardware and other conditions, such as limited storage space, limited transmission bandwidth, etc., the encoder always hopes to make the video stream as small as possible. [0003] Video coding mainly includes the processes of prediction, transformation, quantization, and encoding. The prediction is divided into two parts: intra prediction and inter prediction, which are used to remove spatial redundancy and temporal redundancy respectively. [0004] Inter-frame prediction is to search for a block that best matches the current block in the reference frame image of the current block...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/122H04N19/176H04N19/186H04N19/513
CPCH04N19/122H04N19/176H04N19/186H04N19/513
Inventor 曾飞洋江东林聚财殷俊方诚
Owner ZHEJIANG DAHUA TECH CO LTD