Intra-frame chroma prediction mode selection method, image processing device and storage device

A chrominance prediction mode and prediction mode technology, applied in the field of image processing, can solve the problem that the encoder cannot select prediction mode candidate modes that are strongly correlated with other luminance modes, ignores the texture correlation between chrominance and luminance blocks, and the encoder is less likely to and other problems, to achieve the effect of reducing residual and video coding distortion, increasing probability, and improving correlation

Active Publication Date: 2019-08-02
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

[0003] However, among the candidate prediction modes adopted by the existing optimal chroma prediction mode selection process, there are prediction modes that do not have a strong correlation with the texture trend of luma blocks, ignoring the texture correlation of chroma an

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  • Intra-frame chroma prediction mode selection method, image processing device and storage device
  • Intra-frame chroma prediction mode selection method, image processing device and storage device
  • Intra-frame chroma prediction mode selection method, image processing device and storage device

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[0020] Such as figure 1 As shown, the first embodiment of a method for selecting an intra-frame chroma prediction mode in this application includes:

[0021] S11: Construct a candidate list of chroma prediction modes.

[0022] The chroma prediction mode of intra prediction can include Planar (plane) mode, DC (direct current) mode, and angle prediction mode. The above prediction modes can be represented by numbers, where 0 is Planar mode, 1 is DC mode, and 2~N represents Angle prediction mode. The intra-frame chroma prediction mode also includes LM (Cross-component linear model prediction, cross-component linear model prediction) mode, LM_L (cross-component linear model prediction using only the left reference) mode, LM_T (cross-component using only the upper reference Linear model prediction) and DM (Derived mode, derived mode), etc. Wherein, the angle prediction mode includes two default modes of vertical and horizontal, and the specific angle numbers of the vertical and h...

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Abstract

The invention discloses an intra-frame chroma prediction mode selection method, an image processing device and a storage device, and the method comprises the steps: constructing a candidate list of chroma prediction modes, the candidate list comprising a plurality of chroma prediction modes; selecting a part of brightness prediction mode of the brightness block corresponding to the current chromablock as a replacement mode; replacing at least one chroma prediction mode in the candidate list with the replacement mode; and selecting an optimal prediction mode from the replaced candidate list topredict the chroma of the current chroma block by using the optimal prediction mode. In this way, the coding compression rate can be increased.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular to a method for selecting an intra-frame chroma prediction mode, an image processing device, and a storage device. Background technique [0002] In the video coding system, there are mainly several modules such as prediction, transform quantization, and entropy coding. The prediction module can be divided into intra-frame prediction and inter-frame prediction, which are respectively used to eliminate redundant information in the spatial domain and redundant information in the temporal domain. Intra prediction is a method to eliminate spatial redundancy by utilizing the strong correlation between adjacent pixels. Intra prediction includes luma prediction and chroma prediction, and both chroma prediction and luma prediction have multiple prediction modes. The size of the compressed video frame is related to the prediction mode selected by the encoder during the...

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Application Information

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IPC IPC(8): H04N19/186H04N19/103H04N19/593
CPCH04N19/186H04N19/593H04N19/103H04N19/159
Inventor 曾飞洋林聚财殷俊方诚其他发明人请求不公开姓名
Owner ZHEJIANG DAHUA TECH CO LTD
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