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Method of video coding using prediction based on intra picture block copy

A block and coding technology, applied in the field of video coding, which can solve problems such as reducing the BD rate and restricting the motion vector search area.

Active Publication Date: 2016-05-18
HFI INNOVATION INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015]2. Motion vector search area is limited
For the existing intra block copy method, the improvement according to JCTVC-O0205 shows a significant reduction in the BD rate

Method used

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  • Method of video coding using prediction based on intra picture block copy
  • Method of video coding using prediction based on intra picture block copy
  • Method of video coding using prediction based on intra picture block copy

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Embodiment Construction

[0039] In order to improve performance or reduce the complexity of IntraBC prediction, the present invention discloses various improved and simplified IntraBC prediction.

[0040] first embodiment. In this embodiment, the IntraBC prediction partition mode is signaled independently of the context model used for the Inter prediction partition. The same binarization with part_mode with intra_bc_flag equal to 1 as shown in Table 3 and Table 4 can be used. Binary strings may be entropy encoded using context-adaptive binary arithmetic coding. When each of these bits is coded, it can use its own context model designed for its context update, independent of the corresponding (counterpart) inter prediction. For example, the inter 2NxN mode is binarized into "01" in Table 3, which is the same as the IntraBC 2NxN mode in Table 4. However, bit "0" in IntraBC 2NxN mode will use a different context model than bit "0" in Inter 2NxN mode. Similarly, binaries for all partition modes have t...

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Abstract

A method of signaling of coding modes including an IntraBC mode (Intra-block copy mode) to improve the coding efficiency is disclosed. In one embodiment, the partition mode associated with IntraBC mode and the corresponding partition mode for Inter mode use the same binarization process and the same context modelling. In another embodiment, the displacement vector of IntraBC prediction for the chroma block is derived from the displacement vectors of the corresponding luma block. In yet another embodiment, a non-square PU is partitioned into multiple TUs (transform units) and IntraBC prediction is performed TU by TU.

Description

[0001] cross reference [0002] This application claims priority to U.S. Provisional Patent Application No. 61 / 909,499, filed November 27, 2013, entitled "Methods and apparatus for intrapicture block copy partitions in video compression"; and 61 / 926,577, filed January 13, 2014 , a US provisional patent application entitled "Methods and apparatus for intra picture block copy in video compression". These patent applications are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to video coding using Intra-blockcopy (Intra-blockcopy, IntraBC) mode, in particular to improving performance or simplifying the processing of Intra-blockcopy coding modes for screen content coding or video coding technology. Background technique [0004] In the current development of screen content coding or range extension (RExt) for the High Efficiency Video Coding (HEVC) standard, some tools have been adopted that enable improved coding effic...

Claims

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Application Information

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IPC IPC(8): H04N19/50
CPCH04N19/52H04N19/91H04N19/186H04N19/70H04N19/96H04N19/107H04N19/122H04N19/13H04N19/137H04N19/159H04N19/176H04N19/593H04N19/61
Inventor 刘杉许晓中
Owner HFI INNOVATION INC
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