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Rapid CU depth selection method for 3D-HEVC intra-frame depth map

A technology of 3D-HEVC and depth map, which is applied in the field of fast CU depth selection of 3D-HEVC intra-frame depth map, can solve the problem of high computational complexity of encoding, achieve the effect of reducing computational complexity and improving encoding speed

Active Publication Date: 2019-11-12
NANHUA UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a fast CU depth selection method for the 3D-HEVC intra-frame depth map for the problem of high computational complexity in the intra-frame coding of the 3D video depth map, which can greatly reduce the coding quality while ensuring that the coding quality is almost unchanged. Computational complexity

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  • Rapid CU depth selection method for 3D-HEVC intra-frame depth map

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[0034] The following is a detailed description of the embodiments of the present invention. This embodiment is carried out based on the technical solution of the present invention, and provides detailed implementation methods and specific operation processes to further explain the technical solution of the present invention.

[0035] The 3D-HEVC intra-frame depth map fast CU depth selection method disclosed in this embodiment is as follows: figure 2 shown, including the following steps:

[0036] Step 1, before encoding a frame of depth map, initialize the early termination division decision threshold is 0;

[0037] Step 2, extract the CTUs that need to be coded sequentially from the depth map, and the specific process of coding each CTU is as follows:

[0038] Step 2.1, sequentially extract the depth i of the CU to be coded, calculate the prediction distortion of each prediction mode when the current coded CU is at the depth i, i∈{0,1,…,N-1}, and obtain the optimal predict...

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Abstract

The invention discloses a 3D-HEVC intra-frame depth map fast CU depth selection method, which comprises the following steps of firstly learning an optimal depth division result obtained by a coded CTUof a current coding frame, and obtaining an early termination division threshold; secondly, obtaining the optimal prediction distortion of the current coding CU at the depth i, a corresponding codingparameter CBF and an optimal prediction mode Pm; and finally, comparing the optimal prediction distortion of the current coding CU with an early termination division threshold, and judging whether toterminate the depth i of the current coding CU in advance to continue downward division or not in combination with the coding parameter CBF of the current coding CU and the optimal prediction mode Pm. Through the above processing process, advanced division and rapid termination of the depth map CU depth i are realized, and the 3D-HEVC intra-frame depth map coding time is greatly reduced under thecondition of ensuring that the coding quality is basically unchanged.

Description

technical field [0001] The invention belongs to the technical field of video coding, and in particular relates to a fast CU depth selection method for a depth map in a 3D-HEVC frame. Background technique [0002] Compared with two-dimensional (2D) video, three-dimensional (3D) video enables users to enjoy a more realistic visual experience by using technologies such as stereo, multi-view and multi-view plus depth (MVD), which have been widely used in multimedia, such as 3D Movies, Freeview TV, etc. To efficiently compress 2D video, the Joint Team on Video Coding (JCT-VC) developed the High Efficiency Video Coding (HEVC) standard. Since 3D video is composed of 2D texture video and its corresponding per-pixel depth map, the 3D Video Coding Extension Development Joint Team (JCT-3V) developed the 3D-HEVC standard based on HEVC to compress 3D video more effectively. [0003] 3D-HEVC inherits the key coding technology of HEVC, such as quadtree coding tree unit (Coding Tree Unit,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/597H04N19/147H04N19/14H04N19/103H04N19/105H04N19/119
CPCH04N19/103H04N19/105H04N19/119H04N19/14H04N19/147H04N19/597
Inventor 李跃刘杰龚向坚丁平尖朱涛陈灵娜
Owner NANHUA UNIV
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