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Method of system for video coding using intra block copy mode

A technology for video coding and decoding and intra-frame block copying, which is applied in the field of video coding and decoding and systems using the intra-frame block copying mode

Active Publication Date: 2018-03-27
HFI INNOVATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] 2. Restricted block vector lookup area
This is considered an additional cost to HEVC

Method used

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  • Method of system for video coding using intra block copy mode
  • Method of system for video coding using intra block copy mode
  • Method of system for video coding using intra block copy mode

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Embodiment Construction

[0044] The following description is a preferred mode of carrying out the present invention. The purpose of this description is to illustrate the general principles of the invention, not to limit it. The scope of protection of the present invention should be defined by the claims.

[0045] As mentioned above, the use of Intra Block Copy mode incurs additional storage requirements and additional memory bandwidth for the reference pictures. The present invention discloses various methods to reduce additional storage requirements and / or additional memory bandwidth for reference images.

[0046] Use of transmit intra-block copy mode

[0047] A method according to the present invention removes constraints from using some specific prediction modes when intra block copy is used and there is no difference between the unfiltered and filtered versions of the current picture.

[0048] To indicate whether Intra Block Copy mode is used, according to a first embodiment of the method, two ...

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Abstract

A method and system for video system using coding modes including an Inter prediction mode and an Intra Block Copy (IntraBC) mode are disclosed. A syntax element in a bitstream is determined to indicate whether two versions of a reconstructed current image unit are needed. If two versions of the reconstructed current image unit are needed, a loop-filtered version of the reconstructed current imageunit and a non-loop-filter version of the reconstructed current image unit are allowed to be stored and used as reference data. Otherwise, only one version of the reconstructed current image unit isstored as the reference data. According to another method, bi-prediction mode is converted to uni-prediction mode for a certain prediction mode, where the bandwidth exceeds the existing worst case.

Description

[0001] priority statement [0002] This application claims the priority of U.S. Provisional Patent Application No. 62 / 197,197 filed on July 27, 2015 and U.S. Provisional Patent Application No. 62 / 245,372 filed on October 23, 2015. The aforementioned US Provisional Patent Application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to video coding and decoding using coding and decoding modes including Intra-block copy (Intra-block copy, IntraBC) mode and inter-frame prediction mode. In particular, the present invention relates to techniques for reducing image caching requirements and overcoming bandwidth issues when using bandwidth-intensive prediction modes. Background technique [0004] High-efficiency video coding (HEVC) is a new codec standard that has been developed in recent years. In the HEVC system, the fixed-size macroblocks of H.264 / AVC are replaced by flexible blocks called coding units (CUs). Pixels in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/00
CPCH04N19/117H04N19/82H04N19/109H04N19/174H04N19/593H04N19/70H04N19/159H04N19/146H04N19/105H04N19/577H04N19/172H04N19/423H04N19/186H04N19/52H04N19/176
Inventor 刘杉许晓中
Owner HFI INNOVATION INC
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