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Intra prediction pixel generation method and apparatus

A technology for predicting pixels and intra-frame prediction, which is applied in image communication, digital video signal modification, electrical components, etc. The effect of noise, the effect of improving coding efficiency

Active Publication Date: 2021-03-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach does not take full advantage of the information available in neighboring pixels as it ignores the possibility that the correlations are not perfectly separable

Method used

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  • Intra prediction pixel generation method and apparatus
  • Intra prediction pixel generation method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 uses a specific example to describe the method for generating intra-frame predicted pixels.

[0063] For a current block whose size is MxN and the intra-frame prediction mode is vertical mode (Vertical Mode), the first prediction pixel group PU whose size is MxN is generated according to the current intra-frame prediction mode 0 .

[0064] For the first prediction pixel group PU 0 Perform iterative filtering, including the following steps:

[0065] 1. For the first prediction pixel group PU 0 Carry out boundary expansion to obtain the expanded pixel group PU 1 , where PU 0 The pixel at the position above is filled by the reference pixel above it, PU 0 The pixel at the left position is filled by its left reference pixel, PU 0 The pixel at the lower position is copied to the PU 0 The pixel value of the bottom row, PU 0 The pixel value at the right position is copied to the PU 0 The pixel values ​​of the rightmost column, such as figure 2 shown;

...

Embodiment 2

[0074] Embodiment 2 uses a specific example to describe the method for generating intra-frame predicted pixels.

[0075] For a current block with a size of WxH and an intra-frame prediction mode of 45 degrees obliquely down to the right, generate the first prediction pixel group PU with a size of WxH according to the current intra-frame prediction mode 0 .

[0076] For the first prediction pixel group PU 0 Perform iterative filtering, including the following steps:

[0077] 1. For the first prediction pixel group PU 0 Carry out boundary expansion to obtain the expanded pixel group PU 1 , where the first prediction pixel group PU 0 The pixel at the upper position is filled with the reference pixel above it, and the first prediction pixel group PU 0 The pixel at the left position is filled with its left reference pixel, and the first prediction pixel group PU 0 The pixel at the lower position and the first prediction pixel group PU 0 The pixel value at the right position ...

Embodiment 3

[0084] Embodiment 3 uses a specific example to describe the method for generating intra-frame prediction pixels.

[0085] For a current block whose size is MxN and whose intra-frame prediction mode is a vertical mode, a first prediction pixel group PU whose size is MxN is generated according to the traditional intra-frame prediction mode 0 .

[0086] For prediction block PU 0 Perform iterative filtering, including the following steps:

[0087] 1. For the first prediction pixel group PU 0 Carry out boundary expansion to obtain the expanded pixel group PU 1 , where PU 0 The pixel at the position above is filled by the reference pixel above it, PU 0 The pixel at the left position is filled by its left reference pixel, PU 0 The pixel at the lower position is copied to the PU 0 The pixel value of the bottom row, PU 0 The pixel value at the right position is copied to the PU 0 the pixel values ​​of the rightmost column;

[0088] 2. For the expanded pixel group PU 1 The it...

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Abstract

The present invention provides a new intra prediction pixel generation method and apparatus, which adds iterative filtering on a prediction pixel to generate a prediction pixel value of a current block for intra prediction on the basis of generating the prediction pixel of the current block in a conventional intra prediction mode.

Description

technical field [0001] The invention relates to an intra-frame prediction mechanism of video codec, and a method and device for generating intra-frame prediction pixels by iterative filtering. Background technique [0002] The video coding standard HEVC includes 33 directional prediction modes besides DC and Planar modes. The reconstructed integer pixels used in intra-frame prediction come from N reconstructed integer pixels on the lower left side of the current block, N reconstructed integer pixels on the right left, 1 reconstructed integer pixel on the upper left corner, N reconstructed integer pixels on the upper right side, and N reconstructed integer pixels on the upper right side Integer pixels are reconstructed, where the block size is NxN. According to the position of the current predicted pixel and the intra prediction mode of the block where the current predicted pixel is located, the position of the reconstructed pixel corresponding to the predicted pixel is obta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/59H04N19/82
CPCH04N19/82H04N19/59
Inventor 虞露潘雅庆
Owner ZHEJIANG UNIV
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