Title:
ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/184214
Kind Code:
A1
Abstract:
The present disclosure relates to an encoding device, an encoding method, a decoding device, and a decoding method which make it possible to further improve image quality. By performing inter-prediction based on bi-directional optical flow (BDOF) using reference frames which precede and follow a current frame which is to be encoded, a prediction unit derives a prediction image of the current frame. At this time, the prediction unit performs BDOF calculations using fine adjustment motion vectors set along a u-axis and a v-axis, which respectively are at an approximately 45-degree direction with respect to an x-axis extending in the horizontal direction of the frame and a y-axis extending in the vertical direction thereof. The present technique is applicable, for example, to an encoding device which performs encoding using inter-prediction.
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Inventors:
KONDO KENJI (JP)
Application Number:
PCT/JP2020/008239
Publication Date:
September 17, 2020
Filing Date:
February 28, 2020
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H04N19/537; H04N19/577
Other References:
XIU, XIAOYU ET AL.: "CE9- related: Complexity reduction and bit-width control for bi-directional optical flow (BIO)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, JVET-L0256_V2, 12TH MEETING, September 2018 (2018-09-01), Macao, CN, pages 1 - 15, XP030190472
XIU, XIAOYU ET AL.: "CE9-related: A simplified design of bi-directional optical flow (BIO", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, JVET-L0591, 12TH MEETING, October 2018 (2018-10-01), Macao, CN, pages 1 - 9, XP030192183
XIU, XIAOYU ET AL.: "CE9: Simplifications on bi-directional optical flow (BDOF) (test 9.1.1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, JVET-M0487, 13TH MEETING, January 2019 (2019-01-01), Marrakech, MA, pages 1 - 4, XP030200533
SETHURAMAN, SRIRAM: "Non-CE9: Methods for BDOF complexity reduction", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 JVET-M0517-V3, 13TH MEETING, January 2019 (2019-01-01), Marrakech, MA, pages 1 - 4, XP030201813
XIU, XIAOYU ET AL.: "CE9-related: A simplified design of bi-directional optical flow (BIO", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, JVET-L0591, 12TH MEETING, October 2018 (2018-10-01), Macao, CN, pages 1 - 9, XP030192183
XIU, XIAOYU ET AL.: "CE9: Simplifications on bi-directional optical flow (BDOF) (test 9.1.1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, JVET-M0487, 13TH MEETING, January 2019 (2019-01-01), Marrakech, MA, pages 1 - 4, XP030200533
SETHURAMAN, SRIRAM: "Non-CE9: Methods for BDOF complexity reduction", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 JVET-M0517-V3, 13TH MEETING, January 2019 (2019-01-01), Marrakech, MA, pages 1 - 4, XP030201813
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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