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A method and device for intra-frame prediction

An intra-frame prediction and prediction direction technology, applied in the field of image processing, can solve the problem of difficulty in guaranteeing prediction accuracy, and achieve the effect of good prediction effect.

Active Publication Date: 2016-12-14
HUAWEI TECH CO LTD
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Problems solved by technology

However, this is a one-way prediction technology, which only uses the reference pixels on one side of the prediction direction for prediction, and the prediction accuracy is difficult to guarantee

Method used

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  • A method and device for intra-frame prediction
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  • A method and device for intra-frame prediction

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0011] Please refer to figure 1 , an embodiment of the present invention provides an intra prediction method, which includes:

[0012] Step 101: According to the prediction direction, obtain the mapping pixels of each reference pixel of the upper adjacent block in the left adjacent block;

[0013] Step 102: Calculate the average pixel value of the pixel values ​​of each reference pixel point of the above adjacent block and its respective mapped pixel ...

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Abstract

The present invention provides an intra-frame prediction method for predicting the current block according to the pixel values ​​of the upper adjacent block and the left adjacent block, which includes obtaining each reference pixel of the upper adjacent block in the left phase Mapping pixels in the adjacent block; calculating the average pixel value of each reference pixel of the above adjacent block and its respective pixel value of the mapping pixel; using the average pixel value, according to the prediction direction, for all Predict the pixel values ​​of the pixels in the current block. The intra prediction method and device provided by the present invention obtain the pixel value of the reference pixel point used for prediction according to the average value of the reference pixel points of the upper adjacent block and the left adjacent block of the current block, fully considering the spatial distribution characteristics of pixels , which has a better predictive effect than the prior art.

Description

technical field [0001] Embodiments of the present invention relate to the field of image processing, and more specifically, to an intra prediction method and device. Background technique [0002] The intra-frame prediction technology in the video coding standard uses the correlation of adjacent blocks and adopts multi-directional prediction to improve the prediction accuracy. For example, there are nine prediction directions for the prediction of the luma component in H.264. The intra-frame prediction technology in the draft HEVC standard is similar to the intra-frame prediction technology used in H.264, but HEVC further expands the block division type and the number of prediction directions, and the prediction direction allows up to 33 directions. The predicted direction distribution is shown in the figure below. The thick box represents the current block, and each black line represents the prediction direction. The figure shows that the prediction of the pixel at the bot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/593H04N19/11H04N19/136
Inventor 林永兵
Owner HUAWEI TECH CO LTD
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