Method and apparatus of current picture referencing for video coding using affine motion compensation

a motion compensation and video coding technology, applied in the field of current picture referencing for video coding using affine motion compensation, can solve the problems of difficult block to find an exact match within the same picture, increase in encoding complexity, and observed inefficiency in applying this concep

Inactive Publication Date: 2020-10-08
MEDIATEK INC
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Problems solved by technology

However, the encoding complexity will also increase in order to select the best partition shape.
It was observed to be not efficient when applying this concept to videos captured by a camera.
It is thus difficult for a block to find an exact match within the same picture of video captured by a camera.
Therefore, the improvement in coding performance is limited.

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  • Method and apparatus of current picture referencing for video coding using affine motion compensation
  • Method and apparatus of current picture referencing for video coding using affine motion compensation
  • Method and apparatus of current picture referencing for video coding using affine motion compensation

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Embodiment Construction

[0052]The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.

[0053]In the video coding based on original quad-tree plus binary tree (QTBT) structure and the luma / chroma separate coding, the luma and chroma are coded separately for all Intra frames (for example, I-slice). However, in HEVC-SCC, the CPR is designed for three colour components joint. The MV of CPR is used for all three components. According to one aspect of the present invention, the CPR design is modified when the luma and chroma are coded separately. In this disclosure, various methods of CPR coding with the luma / chroma separate CU structure are proposed as follows. In the following, various aspects of using the CPR mode for luma / chroma separate coding are disclos...

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Abstract

A method and apparatus for a video coding system with the current picture referencing (CPR) mode enabled are disclosed. According to one method, if one reference picture index for the current block points to the current image, the affine motion compensation is inferred as Off for the current block without a need for signalling or parsing an affine mode syntax or the adaptive MV resolution is inferred as On for the current block without a need for signalling or parsing an adaptive motion vector resolution syntax. In another method, if the affine mode is used for the current block or if the adaptive MV resolution is not used for the current block, a reference picture index for the current block is signalled or parsed and the reference picture index always points to one reference picture other than the current image.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present invention claims priority to U.S. Provisional Patent Application, Ser. No. 62 / 342,883 filed on May 28, 2016. The U.S. Provisional Patent Application is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to block partition for coding and / or prediction process in video coding. In particular, the present invention discloses various coding arrangements for a coding system using current picture referencing (CPR).BACKGROUND AND RELATED ART[0003]The High Efficiency Video Coding (HEVC) standard is developed under the joint video project of the ITU-T Video Coding Experts Group (VCEG) and the ISO / IEC Moving Picture Experts Group (MPEG) standardization organizations, and is especially with partnership known as the Joint Collaborative Team on Video Coding (JCT-VC). In HEVC, one slice is partitioned into multiple coding tree units (CTU). In main profile, the minimum and the maximum si...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N19/105H04N19/176H04N19/70H04N19/513H04N19/159
CPCH04N19/70H04N19/513H04N19/176H04N19/105H04N19/159H04N19/00H04N19/119H04N19/186H04N19/436H03M7/30H04N19/52H04N19/96
Inventor CHUANG, TZU-DERCHEN, CHING-YEHHUANG, YU-WENXU, XIAOZHONG
Owner MEDIATEK INC
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