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Rapid high efficiency video coding (HEVC) method based on depth and space-time relevancy of coding units

A space-time correlation and encoding unit technology, which is applied in the field of video encoding, can solve the problems of reducing the complexity of the encoder, and achieve the effects of acceleration speed, good rate-distortion performance, and strong practicability

Active Publication Date: 2014-05-21
ZHEJIANG UNIV
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Problems solved by technology

[0008] Lee et al. use the block partition correlation between the CU at the same position in the previous frame and the current CU to skip some partitions in the current CU, but this method only uses the temporal correlation between the CU and the CU at the same position in the previous frame. If the temporal and spatial correlation of the coding unit can be fully exploited, the encoder complexity can be further reduced

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  • Rapid high efficiency video coding (HEVC) method based on depth and space-time relevancy of coding units
  • Rapid high efficiency video coding (HEVC) method based on depth and space-time relevancy of coding units
  • Rapid high efficiency video coding (HEVC) method based on depth and space-time relevancy of coding units

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Embodiment Construction

[0054] The following describes in detail the fast HEVC encoding method based on the deep spatio-temporal correlation of coding units in the present invention with reference to the accompanying drawings.

[0055] like figure 1 As shown, a fast HEVC encoding method based on coding unit depth spatio-temporal correlation includes the following steps:

[0056] (1) Input the original coding sequence;

[0057] (2) Extract the depth of the coded coding unit, that is, divide the original coding sequence into several blocks of different sizes, and record the depth of each block (ie figure 1 Medium-depth full search);

[0058] If the coding unit is a 64×64 coding unit, the depth range is 0, 1, 2 or 3;

[0059] If the CU is a 32×32 CU, the depth range is 1, 2 or 3.

[0060] (3) if figure 2 As shown, Cr represents the current coding unit (ie, 64×64 coding unit or 32×32 coding unit), and L_cr is the corresponding coding unit on the left; Co is the reference frame (ie, the previous fra...

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Abstract

The invention discloses a rapid high efficiency video coding (HEVC) method based on depth and space-time relevancy of coding units. The rapid HEVC method includes the following steps of (1) inputting an original coding sequence; (2) extracting the depth of a coded coding unit; (3) if the depth of a current coding unit is smaller than a depth threshold value, using a depth relationship of two adjacent coding units in a prior frame to narrow a depth search range of the current coding unit; (4) searching the depth within the depth search range obtained in step (3) according to the increasing sequence and ending the depth search unit the maximum depth is searched; (5) determining an optimum coding tree unit partition according to the depth searched in step (4), and subsequently performing HEVC. According to the HEVC method, the HEVC can be obviously accelerated, better rate-distortion properties can be guaranteed, and higher practicability is achieved.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to a fast HEVC coding method based on deep spatio-temporal correlation of coding units. Background technique [0002] In recent years, with the development of high-definition and ultra-high-definition (3840×2160 or 7680×4320) videos, the compression efficiency of the H.264 / AVC video compression standard has been unable to meet the transmission and storage requirements of these videos. [0003] In order to further improve video compression efficiency, MPEG and VCEG established the Joint Video Coding Collaborative Team (JCT-VC) in 2010 to jointly develop next-generation video compression standards. The next-generation video compression standard, called HEVC, was officially released in early 2013. [0004] As the latest video compression standard, HEVC can provide the same quality code stream under the condition of occupying half the code rate of H.264 / AVC advanced layer (high prof...

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Application Information

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IPC IPC(8): H04N19/96H04N7/015
Inventor 陈耀武周承涛田翔
Owner ZHEJIANG UNIV
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