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Inter-frame Prediction Method in Hybrid Video Coding Standard

An inter-frame prediction and video coding technology, applied in digital video signal modification, electrical components, image communication, etc., can solve problems such as enhancing robustness, improve coding efficiency, improve inter-frame prediction performance, and enhance inter-frame prediction. performance effect

Active Publication Date: 2017-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of how to strengthen the robustness in the existing weighted prediction scheme, and propose an inter-frame prediction method in the hybrid video coding standard

Method used

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specific Embodiment approach 1

[0019] The inter-frame prediction method in the hybrid video coding standard of this embodiment, such as figure 1 As shown, the prediction method is realized through the following steps:

[0020] Step 1: Select the current block, obtain the corresponding block in the time domain of the current block as the prediction block of the current block, select the adjacent pixels in the spatial domain of the current block and the adjacent pixels in the spatial domain of the corresponding block in the time domain, and use the linear weighted prediction model: y=ax+b , to find the weighted prediction parameters of the current block: weighting factor a and additional offset b; where y represents the spatial neighboring pixels of the current block, and x represents the spatial neighboring pixels of the corresponding block in the time domain;

[0021] Step 2: According to the weighting factor a and the additional offset b obtained in step 1, the linear weighted prediction model in step 1 is...

specific Embodiment approach 2

[0025] The difference from the first embodiment is that in the inter-frame prediction method in the hybrid video coding standard of this embodiment, the inter-frame prediction is enhanced in step three, specifically for all inter-frame predictions in one frame, or 2Nx2N divisions in one frame Inter-frame prediction, or inter-frame prediction of merge 2Nx2N and skip 2Nx2N in a frame; wherein, the type of the frame is a P frame or a B frame.

specific Embodiment approach 3

[0027] The difference from the first embodiment is that in the inter-frame prediction method in the hybrid video coding standard of this embodiment, the inter-frame prediction is enhanced in step three, specifically the prediction of the luminance component, or the prediction of the luminance component and the chrominance component; wherein, The type of the frame is a P frame or a B frame.

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Abstract

The invention discloses an inter-frame prediction method in a mixed video coding standard, and belongs to the field of video coding. The purpose is to solve the problem that an existing weighted prediction scheme is low in robustness. The inter-frame prediction method in the mixed video coding standard includes the following steps that a current block is selected, a time domain corresponding block of the current block is acquired and serves as a prediction block of the current block, and the space domain adjacent pixel of the current block and the space domain adjacent pixel of the time domain corresponding block are selected to obtain the weighted prediction parameters of the current block by the utilization of a linear weighted prediction model y=ax+b, wherein the weighted prediction parameters comprise a weighted factor a and additional deviation b, y represents the space domain adjacent pixel of the current block, and x represents the space domain adjacent pixel of the time domain corresponding block; according to the obtained weighted factor a and the additional deviation b, the linear weighted prediction model in the step 1 is used for processing a prediction pixel value in the prediction block so that the processed prediction block can approach to the current block; the obtained processed prediction block is used for inter-frame prediction.

Description

technical field [0001] The invention relates to an inter-frame prediction method in a hybrid video coding standard. Background technique [0002] With the improvement of people's requirements for video display quality, new video application forms such as high-definition and ultra-high-definition video have emerged. In the situation that the high-resolution and high-quality video appreciation is more and more widely used, how to enhance the video compression efficiency becomes crucial. [0003] During the digitization of images and videos, a large amount of data redundancy is generated, which makes video compression technology possible. Generally speaking, redundancy types include at least spatial redundancy, time redundancy, and information entropy redundancy. For the elimination of time redundancy, a method based on prediction is generally used, that is, inter-frame predictive coding. The basic idea is to find the block that best matches the current block from the encode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/513H04N19/587
Inventor 范晓鹏张娜赵德斌
Owner HARBIN INST OF TECH