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WO2018172609A3 - Motion compensation in video encoding and decoding - Google Patents

Motion compensation in video encoding and decoding Download PDF

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Publication number
WO2018172609A3
WO2018172609A3 PCT/FI2018/050193 FI2018050193W WO2018172609A3 WO 2018172609 A3 WO2018172609 A3 WO 2018172609A3 FI 2018050193 W FI2018050193 W FI 2018050193W WO 2018172609 A3 WO2018172609 A3 WO 2018172609A3
Authority
WO
WIPO (PCT)
Prior art keywords
motion vector
vector predictor
modified
predictor candidate
line
Prior art date
Application number
PCT/FI2018/050193
Other languages
French (fr)
Other versions
WO2018172609A2 (en
Inventor
Jani Lainema
Original Assignee
Nokia Technologies Oy
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 Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2018172609A2 publication Critical patent/WO2018172609A2/en
Publication of WO2018172609A3 publication Critical patent/WO2018172609A3/en

Links

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
    • 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
    • H04N19/557—Motion estimation characterised by stopping computation or iteration based on certain criteria, e.g. error magnitude being too large or early exit
    • 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
    • H04N19/56—Motion estimation with initialisation of the vector search, e.g. estimating a good candidate to initiate a search
    • 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
    • H04N19/57—Motion estimation characterised by a search window with variable size or shape
    • 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
    • H04N19/577—Motion compensation with bidirectional frame interpolation, i.e. using B-pictures

Landscapes

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

Abstract

There are disclosed various methods, apparatuses, and computer readable storage media for video encoding and decoding. In some embodiments for decoding or encoding, a block (81) of a current picture (80) is obtained. The block (81 ) is split at least into a first line-set and a second line-set, where the splitting direction is a horizontal direction or a vertical direction. A one-dimensional motion vector refinement process for each line-set is performed, where horizontal components or vertical components of motion vectors of the line-set are updated based on the splitting direction. In the one-dimensional motion vector refinement process, a first motion vector predictor candidate (82) pointing to a first reference block (83) in a first reference picture (84) and a second motion vector predictor candidate (85) pointing to a second reference block (86) in a second reference picture (87) are obtained. A difference vector (88) is added to the first motion vector predictor candidate (82) to obtain a modified first motion vector predictor candidate (89) and subtracted from the second motion vector predictor candidate (85) to obtain a modified second motion vector predictor candidate (90). A cost estimate is determined for bi-directional motion prediction on the basis of the modified first motion vector predictor candidate (89) and the modified second motion vector predictor candidate (90). The addition, subtraction and cost estimate determination may be repeated to obtain a set of modified first motion vector predictor candidates, a set of modified second motion vector predictor candidates and a set of cost estimates. A first motion vector predictor is selected from the set of modified first motion vector predictor candidates and a second motion vector predictor is selected from the set of modified second motion vector predictor candidates on the basis of the set of cost estimates.
PCT/FI2018/050193 2017-03-21 2018-03-16 Motion compensation in video encoding and decoding WO2018172609A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20175258 2017-03-21
FI20175258 2017-03-21

Publications (2)

Publication Number Publication Date
WO2018172609A2 WO2018172609A2 (en) 2018-09-27
WO2018172609A3 true WO2018172609A3 (en) 2018-11-08

Family

ID=63584198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2018/050193 WO2018172609A2 (en) 2017-03-21 2018-03-16 Motion compensation in video encoding and decoding

Country Status (1)

Country Link
WO (1) WO2018172609A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111418205B (en) * 2018-11-06 2024-06-21 北京字节跳动网络技术有限公司 Motion candidates for inter prediction
US11025936B2 (en) * 2019-01-25 2021-06-01 Tencent America LLC Method and apparatus for video coding
EP3939310A4 (en) * 2019-03-11 2022-07-27 Telefonaktiebolaget LM Ericsson (publ) Motion refinement and weighted prediction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471577A (en) * 2009-07-03 2011-01-05 Intel Corp Decoder side motion estimation (ME) using plural reference frames
US20160286230A1 (en) * 2015-03-27 2016-09-29 Qualcomm Incorporated Motion information derivation mode determination in video coding
WO2017036414A1 (en) * 2015-09-02 2017-03-09 Mediatek Inc. Method and apparatus of decoder side motion derivation for video coding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471577A (en) * 2009-07-03 2011-01-05 Intel Corp Decoder side motion estimation (ME) using plural reference frames
US20160286230A1 (en) * 2015-03-27 2016-09-29 Qualcomm Incorporated Motion information derivation mode determination in video coding
WO2017036414A1 (en) * 2015-09-02 2017-03-09 Mediatek Inc. Method and apparatus of decoder side motion derivation for video coding

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHIU, Y-J. ET AL.: "Decoder-side motion estimation and Wiener filter for HEVC", VISUAL COMMUNICATIONS AND IMAGE PROCESSING, 17 October 2013 (2013-10-17) - 20 October 2013 (2013-10-20), pages 6, XP032543658, Retrieved from the Internet <URL:https://ieeexptore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6706446> [retrieved on 20180926] *

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WO2018172609A2 (en) 2018-09-27

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