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A SHVC Quality Scalable Base Layer Inter Prediction Method for Joint Enhancement Layers

A prediction method and technology of the base layer, which are applied in the directions of image communication, digital video signal modification, electrical components, etc., can solve the problems affecting the coding efficiency of the enhancement layer, etc., and achieve the effect of improving efficiency and accurate motion vectors.

Active Publication Date: 2019-04-16
SHANGHAI UNIV
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AI Technical Summary

Problems solved by technology

Because in high-efficiency video quality scalable coding, the base layer and the enhancement layer have the same motion and texture characteristics, but compared with the base layer, the enhancement layer has better reconstructed frames, that is, contains more high-frequency information, so Using the enhancement layer to reconstruct frames for motion estimation can make the base layer obtain more accurate motion vectors. At the same time, SHVC provides inter-layer reference technology to improve the coding efficiency of the enhancement layer, so the base layer obtains accurate motion vectors to a certain extent. Affects enhancement layer coding efficiency

Method used

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  • A SHVC Quality Scalable Base Layer Inter Prediction Method for Joint Enhancement Layers
  • A SHVC Quality Scalable Base Layer Inter Prediction Method for Joint Enhancement Layers
  • A SHVC Quality Scalable Base Layer Inter Prediction Method for Joint Enhancement Layers

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Embodiment

[0055] Improved base layer motion estimation such as Figure 5 As shown, the method is implemented under SHM 5.0, and the specific implementation steps are as follows:

[0056] Step 1, base layer BL inter-frame predictive coding:

[0057] (1.1) For advanced motion vector prediction techniques: firstly, from 5 candidate space-domain motion vectors (A 0 , A 1 , B 0 , B 1 , B 2 ) to select 2 motion vectors and add them to the list of predicted motion vectors; 0 , C 1 ) to select a motion vector and add it to the predicted motion vector list. If the finally available candidate motion vectors do not satisfy 3, use zero motion vectors to make up.

[0058] (1.2) Change the motion estimation algorithm of the basic layer, the main steps are as follows:

[0059] (1.2.1) Obtain the serial number of the reference frame of the current reference base layer, and replace it with the coded frame corresponding to the enhancement layer. It is worth noting that the base layer reference ...

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Abstract

The invention relates to an EC-combined (enhancement layer combined) SHVC (scalable high efficiency video coding) quality gradable BL (base layer) interframe prediction method. The method comprises the specific steps: 1, BL coding: obtaining a prediction motion vector list through employing the advanced motion vector prediction technology, modifying a BL original motion estimation algorithm, carrying out the BL motion estimation through employing an EL reconstruction frame, and carrying out the motion compensation through the obtained motion vector; 2, EL coding: maintaining the technology of original inter-frame prediction; sequentially carrying out the technology of advanced motion vector prediction, and obtaining a prediction motion vector list; firstly carrying out the whole pixel motion estimation according to the prediction motion vector list, secondly carrying out the pixel motion estimation, and finally obtaining an optimal motion vector; and carrying out the motion compensation through the motion vector obtained through motion estimation. The method can improve the coding efficiency and reduce the code rate during quality gradable coding of two layers.

Description

technical field [0001] The invention relates to a SHVC (Scalable High Efficiency Video Coding, Scalable Video Coding extension) quality-scalable inter-frame prediction method of a joint enhancement layer on a basic layer. Background technique [0002] In recent years, with the rapid development of personal wireless communications, the Internet and mobile devices and their wide application in social production and life practices, applications such as streaming media services, video telephony, video conferencing and various video surveillance have begun to expand to hybrid platforms . In the standardization process of video coding, the MPEG expert group and the International Telecommunication Union ITU-T have made significant contributions. They have formulated and released a series of international standards, which provide a unified interface and standard for video compression coding in different fields. Video coding technology is becoming more and more perfect and mature. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/30H04N19/503H04N19/19H04N19/53
CPCH04N19/19H04N19/30H04N19/503H04N19/53
Inventor 马然康朦朦李泽福
Owner SHANGHAI UNIV
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