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Method for quickly selecting depth of H.265/HEVC inter-frame encoding unit

A coding unit and fast selection technology, applied in electrical components, digital video signal modification, image communication, etc., can solve problems such as high complexity, save coding time, realize encoder complexity, and ensure the effect of video reconstruction quality

Inactive Publication Date: 2017-08-18
BEIJING UNIV OF TECH
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a fast inter-coding unit depth selection method that integrates top skip and early termination ideas for the high complexity problem caused by inter-coding unit depth traversal, while ensuring the coding quality , to speed up the H.265 / HEVC encoding process

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  • Method for quickly selecting depth of H.265/HEVC inter-frame encoding unit

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Embodiment Construction

[0035] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as image 3 As shown, the embodiment of the present invention provides a method for fast selection of H.265 / HEVC inter-coding unit depth, which is divided into the following two aspects:

[0037] First, the initial division depth prediction of coding units based on texture complexity and quantization parameters

[0038] The initial division depth of the current coding unit is closely related to its texture complexity (Texture Complexity, TC) and the quantization parameter (Quantization Parameter, QP) of the encoder. Therefore, in order to further improve the coding speed of H.265 / HEVC, this method introduces the idea of ​​"top skipping" into the fast selection algorithm of inter coding unit depth based on machine learning, and constructs coding units based on texture complexity and quantization parameters. The initial division de...

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Abstract

The invention discloses a method for quickly selecting the depth of an H.265 / HEVC inter-frame encoding unit. The method comprises the following steps: firstly, applying a top end skipping idea to method optimization by exploring the texture complexity of the encoding unit and the incidence relation between encoder quantization parameters and the depth selection of the encoding unit, designing an initial depth division prediction strategy of the encoding unit based on the texture complexity and the quantization parameters, and skipping the division of unnecessary large-size encoding units; then, applying an advanced termination idea to the method optimization by using the relevance among the depth selection of the encoding unit, the encoding code rate and the encoding distortion, designing a depth division termination selection strategy of the encoding unit based on code rate and distortion, and solving the problem of deciding division or not through an offline trained classifier. By adoption of the technical scheme of the invention, while the division precision of the encoding unit is ensured, the encoding time of 34.56% can be saved on average.

Description

technical field [0001] The invention belongs to the field of video compression coding, and relates to a machine learning-based method for fast selection of H.265 / HEVC inter-frame coding unit depth. Background technique [0002] Today, with the deepening of information globalization, video has become the main source of information for human beings in the information age because of its ability to carry rich visual information. As a result, the popularization of video information has triggered the explosive growth of video data, and at the same time, it has also promoted the great progress of video coding technology marked by high efficiency. Faced with the development trend of video applications towards higher definition and higher frame rate, researchers who focus on the optimization of video coding technology have not stopped exploring, focusing on "lower bit rate" and "higher quality". The next-generation video coding standard - H.265 / HEVC (High Efficiency Video Coding, H....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/96H04N19/13H04N19/122H04N19/109H04N19/147
CPCH04N19/109H04N19/122H04N19/13H04N19/147H04N19/96
Inventor 刘鹏宇吴玥颖丰泽琪贾克斌
Owner BEIJING UNIV OF TECH
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