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A Video Intra Coding Method Combining Directional Prediction and Block Copy Prediction

A technology of direction prediction and video frame, applied in the field of video coding, which can solve the problems of high noise, complex shooting angles of natural video, and poor effect.

Active Publication Date: 2018-04-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Block copy prediction technique works well in SCC but not in natural video
This is mainly because the natural video shooting angle is complex, the noise is large, and even if there are repeated textures, they are mostly irregular shapes, which are rarely aligned with square coding units, so similar reference blocks cannot be searched

Method used

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  • A Video Intra Coding Method Combining Directional Prediction and Block Copy Prediction
  • A Video Intra Coding Method Combining Directional Prediction and Block Copy Prediction
  • A Video Intra Coding Method Combining Directional Prediction and Block Copy Prediction

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Experimental program
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Embodiment 1

[0100] The steps of a video intra-coding method combined with directional prediction and block copy prediction provided in this embodiment are as follows:

[0101] The first step is to determine the division type.

[0102] In this embodiment, the multiple division types include a total of 28 division types covering horizontal direction, vertical direction, diagonal direction from upper right to lower left, and diagonal direction from upper left to lower right.

[0103] The seven divisions in the horizontal direction are recorded as H1~H7, the seven divisions in the vertical direction are recorded as V1~V7; the seven divisions in the diagonal direction from upper right to lower left are recorded as T1~T7, The seven divisions in the diagonal direction are denoted as D1 to D7.

[0104] Such as figure 2 Shown is a schematic diagram of the division of V1, V2,..., V7. A square in V1 represents the current coding block. The square is divided into two rectangles on the left and ri...

Embodiment 2

[0145] The steps of a video intra-coding method combined with directional prediction and block copy prediction provided in this embodiment are as follows:

[0146] The first step is to determine the division type.

[0147] In this embodiment, the multiple division types include 7 division types whose upper left is L-type and 7 division types whose upper right is L-type.

[0148] The 7 division types with L-type on the upper left are denoted as L1~L7, and the 7 division types with L-type on the upper right are denoted as R1-R7;

[0149] Such as Figure 7 As shown, it is a schematic diagram of division of L1, L2,..., L7. In L1, a square is divided into an upper-left L-shaped square and a lower-right square. The width of the upper-left L-shaped square occupies 1 / 8 of the width of the entire square; the width of the lower-right square occupies 7 / 8 of the entire square width; in L2 A square is divided into an upper-left L-shaped square and a lower-right square. The width of the ...

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Abstract

The invention discloses a directional intra prediction and block copy prediction combined video intra coding method. According to the method, a coding block is segmented into two sub-blocks in a flexible block segmentation mode, so prediction content in the same block can contain both local information and non-local information; and prediction of each block with least cost is decided through RDO (Rate Distortion Optimization). Moreover, rapid RDO and complete RDO are combined, and on the premise of not influencing the coding performance, the coding complexity is reduced. The general effect is that the complexity of a decoding side is basically not increased, and the higher compression efficiency is obtained.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a video intra-frame coding method combined with directional prediction and block duplication prediction. Background technique [0002] In recent years, with the rapid development of the Internet, there are more and more demands for video applications on the Internet, and the amount of video data is very large. If the video can be transmitted on the Internet with limited bandwidth, the first problem that must be solved is the video Compression encoding problem. [0003] The video coding standards that have been formulated all belong to the hybrid video coding framework. The so-called hybrid video coding generally consists of the following parts: prediction (Prediction), transformation (Transform), quantization (Quantization) and entropy coding (Entropy Coding). The prediction is generally divided into intra prediction and inter prediction. A video frame that can on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/593H04N19/11
CPCH04N19/11H04N19/176H04N19/593
Inventor 刘东李跃吴枫李厚强
Owner UNIV OF SCI & TECH OF CHINA