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3D-HEVC rapid transcoding method based on unbalanced quadtree

A 3D-HEVC and quadtree technology, applied in the field of video transcoding, can solve problems such as zero, and achieve the effect of speeding up the transcoding process, reducing the complexity of the encoder, and ensuring the rate gain

Active Publication Date: 2018-09-28
BEIJING UNIV OF TECH
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  • Abstract
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Problems solved by technology

However, the current research on effective video transcoding for 3D-HEVC is almost zero

Method used

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  • 3D-HEVC rapid transcoding method based on unbalanced quadtree
  • 3D-HEVC rapid transcoding method based on unbalanced quadtree
  • 3D-HEVC rapid transcoding method based on unbalanced quadtree

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Embodiment Construction

[0018] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 2 As shown, the present invention is a 3D-HEVC fast transcoding method based on an unbalanced quadtree. Aiming at the quadtree coding structure adopted in 3D-HEVC, a fast selection method of CTU division depth range is designed. In actual use, the HTM16.0 encoder will call the method of the present invention to complete the specific encoding work. The concrete steps of the inventive method are as follows:

[0020] Step 1: Take out the CTU to be transcoded from the video sequence to be transcoded;

[0021] Step 2: If the image of the CTU to be transcoded is a texture image, use min L_Texture ,max L_Texture with max H_Texture , min H_Texture There is a correlation between them, and it is determined that the coding unit division depth range of the CTU is [maximum(min H_Texture -1,0), minimum(max H_Texture +1,3)], p...

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Abstract

The invention discloses a 3D-HEVC rapid transcoding method based on an unbalanced quadtree. Correlation between coding unit division depth information in coded high resolution bit streams and CTU (Coding Tree Unit) division depth in dimension-reduced videos, and the correlation between the CUT maximum division depth of texture graphs and depth graphs are utilized, a CTU division depth selection range is reduced, and an unnecessary division depth rate-distortion cost computing process is skipped, so a 3D-HEVC transcoding process is accelerated. Through adoption of the technical scheme providedby the invention, the video quality is ensured, and 25.88% of coding time can be reduced averagely.

Description

technical field [0001] The invention belongs to the field of video transcoding, and relates to a 3D-HEVC fast transcoding method based on an unbalanced quadtree. Background technique [0002] With the increasing development of video technology, 3D video has become a research hotspot in the industry and academia due to its sense of presence and interaction, and the 3D-HEVC video coding standard came into being. On the other hand, with the development of information technology, many types of handheld terminal devices have become a must-have in people's lives due to their portability. The coexistence of multiple video coding standards, heterogeneous networks, and the diversity of terminal equipment and video formats lead to compatibility issues between terminal equipment, networks, and original video formats. Video transcoding is a technology that can effectively solve this compatibility problem. In order to adapt 3D video to real-time applications of various types of handhel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/40H04N19/96H04N19/70
CPCH04N19/40H04N19/70H04N19/96
Inventor 刘鹏宇冯秀君贾克斌
Owner BEIJING UNIV OF TECH
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