WO2015139177A1 - Procédé amélioré de prévision intra-vecteur - Google Patents

Procédé amélioré de prévision intra-vecteur Download PDF

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Publication number
WO2015139177A1
WO2015139177A1 PCT/CN2014/073528 CN2014073528W WO2015139177A1 WO 2015139177 A1 WO2015139177 A1 WO 2015139177A1 CN 2014073528 W CN2014073528 W CN 2014073528W WO 2015139177 A1 WO2015139177 A1 WO 2015139177A1
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WO
WIPO (PCT)
Prior art keywords
current
predictor
neighboring
decoded
ibc
Prior art date
Application number
PCT/CN2014/073528
Other languages
English (en)
Inventor
Xianguo Zhang
Kai Zhang
Jicheng An
Han HUANG
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2014/073528 priority Critical patent/WO2015139177A1/fr
Publication of WO2015139177A1 publication Critical patent/WO2015139177A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • H04N19/51—Motion estimation or motion compensation
    • H04N19/513—Processing of motion vectors
    • H04N19/517—Processing of motion vectors by encoding
    • H04N19/52—Processing of motion vectors by encoding by predictive encoding

Definitions

  • the invention relates generally to video processing.
  • the presented invention relates to intra block copy.
  • Intra block copy (Intra BC) was adopted to take advantage of reduplicated content in a picture.
  • a reference block in the current picture is copied to the current block as the prediction if Intra BC is applied.
  • the reference block is located by applying a block-copy vector (BV).
  • BV block-copy vector
  • BV is predicted from the previous coded BV, as Fig. 2 shows.
  • IBC PU For each PU coding by IBC (IBC PU), if the PU index is 0, the predicted BV is the BV of the last IBC PU in previous decoded CU with IBC (IBC CU); otherwise, the predicted BV is the BV of the previous PU in the current IBC CU.
  • the BV of one CTU's first CU's first PU is set zero.
  • the predicted BV is probably from the 2 nd up-right IBC CU or PU.
  • the 3 rd and 2 nd CUs or the 3 rd and 2 nd PUs are not neighboring.
  • FIG. 1 is a diagram illustrating Intra block copy.
  • FIG. 2 is a diagram illustrating the REXT 6[l]'s design for BV prediction for each PU.
  • Fig. 3 is a diagram illustrating one solution for Predicting BV of the 3 rd PU from the 1 st PU, and other PUs' BV predictions are not changed.
  • Fig. 4 is a diagram illustrating one solution for Predicting BV of the 3 rd CU from the 1 st IBC CU, and other CUs' BV predictions are not changed.
  • the BV predictor of every CU's 3 rd PU is the BV of the 1 st PU, as Fig. 3 shows.
  • the BV predictor BP of the coding quadtree's 3 rd CU's first PU is the BV of A. Otherwise, BP equals to the BV of the previous CU in the current CTU, as Fig. 4 shows.
  • the BV predictor BP of the coding quadtree's 3 rd CU's first PU is the BV of the 2 nd CU's previous CU in the current CTU.
  • the BV predictor of the current CU's first PU equals to (0-width of the current CU, 0).
  • the BV predictor of the current CU's first PU equals to the B V of the last PU of the CU neighboring to the current CU.
  • the BV predictor of the current CU's first PU equals to the BV of the PU neighboring to the current CU.
  • the BV predictor of the current PU equals to the BV of the PU neighboring to the current PU.
  • the BV predictor of the current PU equals to the BV of the PU belonging or neighboring to the current CU.
  • the BV predictor calculation is the combination of embodiments El, E2, E3 and E4, where El is equal to null or 1 st embodiment, E2 is equal to the null, 2 nd or 3 rd embodiment, E3 is equal to 4 th , 5 th or 6 th embodiment, and E4 is equal to 7 th , or 8 th embodiment.
  • the BV predictor of each PU of the current CU is the last decoded BV of the previously decoded IBC CU.
  • the selection of one PU's BV predictor can be predefined or signaled by flags transmitted in sequence, picture, slice, CTU, coding quadtree, CU or PU level.
  • an embodiment of the present invention can be a circuit integrated into a video compression chip or program codes integrated into video compression software to perform the processing described herein.
  • An embodiment of the present invention may also be program codes to be executed on a Digital Signal Processor (DSP) to perform the processing described herein.
  • DSP Digital Signal Processor
  • the invention may also involve a number of functions to be performed by a computer processor, a digital signal processor, a microprocessor, or field programmable gate array (FPGA).
  • processors can be configured to perform particular tasks according to the invention, by executing machine-readable software code or firmware code that defines the particular methods embodied by the invention.
  • the software code or firmware codes may be developed in different programming languages and different format or style.
  • the software code may also be compiled for different target platform.
  • different code formats, styles and languages of software codes and other means of configuring code to perform the tasks in accordance with the invention will not depart from the spirit and scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

L'invention concerne des procédés de prévision de vecteur de copie de bloc efficace. Des vecteurs de copie de bloc dans un bloc sont proposés pour une prévision à partir de vecteurs de copie de bloc d'une unité de prévision IBC voisine. En particulier, le premier prédicteur de vecteur de copie de bloc d'unité de prévision de la 3ème unité de codage dans un arbre quadratique de codage et la 3ème unité de prévision dans chaque prédicteur de vecteur de copie de bloc d'unité de codage devraient provenir d'unités de codage et d'unités de prévision voisines.
PCT/CN2014/073528 2014-03-17 2014-03-17 Procédé amélioré de prévision intra-vecteur WO2015139177A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/073528 WO2015139177A1 (fr) 2014-03-17 2014-03-17 Procédé amélioré de prévision intra-vecteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/073528 WO2015139177A1 (fr) 2014-03-17 2014-03-17 Procédé amélioré de prévision intra-vecteur

Publications (1)

Publication Number Publication Date
WO2015139177A1 true WO2015139177A1 (fr) 2015-09-24

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PCT/CN2014/073528 WO2015139177A1 (fr) 2014-03-17 2014-03-17 Procédé amélioré de prévision intra-vecteur

Country Status (1)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102595140A (zh) * 2012-03-09 2012-07-18 北京邮电大学 基于图像修复和矢量预测算子的帧内预测视频编码方法
WO2013143103A1 (fr) * 2012-03-29 2013-10-03 Mediatek Singapore Pte. Ltd. Procédés et appareils de codage en mode intra pour une extension scalable d'un codage vidéo à haute efficacité (hevc)
WO2013181821A1 (fr) * 2012-06-07 2013-12-12 Mediatek Singapore Pte. Ltd. Mode saut de transformation intra amélioré

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102595140A (zh) * 2012-03-09 2012-07-18 北京邮电大学 基于图像修复和矢量预测算子的帧内预测视频编码方法
WO2013143103A1 (fr) * 2012-03-29 2013-10-03 Mediatek Singapore Pte. Ltd. Procédés et appareils de codage en mode intra pour une extension scalable d'un codage vidéo à haute efficacité (hevc)
WO2013181821A1 (fr) * 2012-06-07 2013-12-12 Mediatek Singapore Pte. Ltd. Mode saut de transformation intra amélioré

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LAROCHE, GUILLAUME ET AL.: "Non-RCE3: On initialization of the block vector predictor for Intra Block Copy", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP 3 AND ISO/ IEC JTC 1/SC 29/WG 11, JCTVC-P0111, 16TH MEETING, 10 January 2014 (2014-01-10), San José, US *

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