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Video image component prediction method and device and computer storage medium

A prediction method and video image technology, applied in the field of video encoding and decoding, can solve problems such as linear model deviation and low accuracy of chroma prediction value, and achieve the effect of improving prediction accuracy and saving coding bit rate

Active Publication Date: 2021-07-02
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, when calculating the model parameters of the linear model, only the adjacent reference luminance value and the adjacent reference chromaticity value are considered, resulting in a deviation in the calculated linear model, so that the chromaticity prediction obtained by using the linear model less accurate value

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  • Video image component prediction method and device and computer storage medium
  • Video image component prediction method and device and computer storage medium
  • Video image component prediction method and device and computer storage medium

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Embodiment 1

[0050] see Figure 4 , which shows an example of a block diagram of a video coding system; see Figure 5 , which shows an example of a block diagram of a video decoding system; as Figure 4 As shown, the video coding system 400 includes transform and quantization 401, intra frame estimation 402, intra frame prediction 403, motion compensation 404, motion estimation 405, inverse transform and inverse quantization 406, filter control analysis 407, deblocking filtering and sample Adaptive indentation (Sample Adaptive Offset, SAO) filtering 408, header information coding and context-based Adaptive Binary Arithmatic Coding (Context-based Adaptive Binary Arithmatic Coding, CABAC) 409 and decoded image cache 410 and other components; such as Figure 5 As shown, the video decoding system 500 includes components such as header information decoding and CABAC decoding 501, inverse transformation and inverse quantization 502, intra prediction 503, motion compensation 504, deblocking filt...

Embodiment 2

[0113] Based on the same inventive concept of the foregoing embodiments, see Figure 9 , which shows the composition of a video image component prediction device 90 provided in the embodiment of the present application. The video image component prediction device 90 may include: a first acquisition part 901, a grouping part 902, a building part 903, a selection part 904 and the first prediction part 905; wherein,

[0114] The first obtaining part 901 is configured to obtain at least one threshold value according to the first image component reconstruction values ​​of all sampling points of the current coding block;

[0115] The grouping part 902 is configured to perform grouping according to the comparison result between the adjacent reference value of the first image component of the current coding block and the at least one threshold, to obtain at least two groups of adjacent reference values ​​of the first image component and the second Image component adjacent reference v...

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Abstract

The embodiment of the invention discloses a video image component prediction method and device and a computer storage medium, and the method comprises the steps: obtaining at least one threshold value according to first image component reconstruction values of all sampling points of a current coding block; grouping according to a comparison result of the first image component adjacent reference value of the current coding block and the at least one threshold value to obtain at least two groups of first image component adjacent reference values and second image component adjacent reference values; establishing at least two calculation models according to the at least two groups of first image component adjacent reference values and second image component adjacent reference values; selecting a calculation model corresponding to each sampling point in the current coding block from the at least two calculation models according to a comparison result of the first image component reconstruction values of all the sampling points of the current coding block and the at least one threshold value; and obtaining a second image component predicted value of each sampling point in the current coding block according to the calculation model corresponding to each sampling point in the current coding block.

Description

[0001] This application is based on the PCT international patent application PCT / CN2018 / 099684 with the filing date of August 09, 2018, which entered the Chinese national phase with the Chinese patent application number 201880096258.2, and the title of the invention is "Prediction method, device and computer storage medium of video image components" If the Chinese patent application for "is filed, a divisional case is proposed within the scope recorded in the Chinese patent application, and the entire content of the Chinese patent application is re-introduced into this application as a reference. technical field [0002] The embodiments of the present application relate to the technical field of video coding and decoding, and in particular, to a method, device, and computer storage medium for predicting video image components. Background technique [0003] With the improvement of people's requirements for video display quality, new video application forms such as high-definit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/105H04N19/186H04N19/147
CPCH04N19/103H04N19/176H04N19/20H04N19/186H04N19/105H04N19/147H04N19/159H04N19/132H04N19/593
Inventor 霍俊彦柴小燕马彦卓杨付正
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD