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Buffer access methods for intra block copy in video coding

A technology of intra-frame block replication and video block, applied in digital video signal modification, image communication, electrical components, etc.

Pending Publication Date: 2021-09-10
BEIJING BYTEDANCE NETWORK TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Despite advances in video compression, digital video still accounts for the largest bandwidth usage on the Internet and other digital communication networks

Method used

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  • Buffer access methods for intra block copy in video coding
  • Buffer access methods for intra block copy in video coding
  • Buffer access methods for intra block copy in video coding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 9

[0558] For a chroma block or subblock starting at (x, y) in 4:2:0 format relative to the upper left corner of the picture and a block vector (BVx, BVy), when isRec(c, (x+BVx+64, y+BVy) is true, the block vector is invalid, where c is the chroma component.

[0559] For a chroma block or subblock starting at (x, y) in 4:4:4 format relative to the upper left corner of the picture and a block vector (BVx, BVy), when isRec(c, (x+BVx+128, y+BVy) is true, the block vector is invalid, where c is the chroma component.

[0560] 5.10 Example #10

[0561] For a luma CU or joint luma / chroma CU and block vector (BVx, BVy) starting from (x, y) associated with the upper left corner of the picture, when isRec(((x+BVx)>>6<<6) Block Vector is invalid.

[0562] For a chroma block or subblock starting at (x, y) in 4:2:0 format relative to the upper left corner of the picture and a block vector (BVx, BVy), when isRec(c,((x+BVx)> >5>5)&1)*32+(x%32),((y+BVy)>>5<<5)+(y%32) ) is true, the block v...

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Abstract

A method of visual media processing includes determining a size of a buffer to store reference samples for prediction in an intra block copy mode; and performing a conversion between a current video block of visual media data and a bitstream representation of the current video block, using the reference samples stored in the buffer, wherein the conversion is performed in the intra block copy mode which is based on motion information related to a reconstructed block located in same video region with the current video block without referring to a reference picture.

Description

[0001] Cross References to Related Applications [0002] In accordance with the applicable patent law and / or pursuant to the rules of the Paris Convention, this application is intended to promptly claim the International Patent Application No. PCT / CN2019 / 074598 filed on February 2, 2019, the International Patent Application No. International patent application CN2019 / 076695, International patent application PCT / CN2019 / 076848 filed on March 4, 2019, International patent application PCT / CN2019 / 077725 filed on March 11, 2019, March 2019 International Patent Application No. PCT / CN2019 / 079151 filed on 21st, International Patent Application No. PCT / CN2019 / 085862 filed on May 7th, 2019, International Patent Application No. PCT / CN2019 / 088129 filed on May 23rd, 2019 Patent applications, International Patent Application No. PCT / CN2019 / 091691 filed on June 18, 2019, International Patent Application No. PCT / CN2019 / 093552 filed on June 28, 2019, International Patent Application No. Internat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/00
CPCH04N19/52H04N19/433H04N19/593H04N19/105H04N19/176H04N19/186H04N19/80H04N19/96H04N19/137H04N19/517H04N19/117H04N19/139H04N19/86H04N19/82H04N19/132H04N19/159H04N19/1883H04N19/423H04N19/146H04N19/174
Inventor 许继征张莉张凯刘鸿彬王悦
Owner BEIJING BYTEDANCE NETWORK TECH CO LTD