Title:
IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM
Document Type and Number:
Japanese Patent JP2021052226
Kind Code:
A
Abstract:
To provide an image decoding device that sets a condition on a distance between a reference frame and a frame in an application condition of BDOF according to a weight for a pixel value of each reference frame in a calculation in BDOF processing.SOLUTION: An inter prediction unit 241 of the image decoding device includes a prediction signal generation unit 241D for determining whether the conditions for applying BDOF processing are satisfied for each block and generating a prediction signal by performing BDOF processing if it is determined that the applicable conditions are satisfied and including a condition regarding a temporal distance between two reference frames and the frame in question in the applicable condition based on weight coefficients when calculating by using pixel values of two reference frames or values calculated from the pixel values in BDOF processing.SELECTED DRAWING: Figure 15
Inventors:
UNNO KYOHEI
KAWAMURA KEI
NAITO HITOSHI
KAWAMURA KEI
NAITO HITOSHI
Application Number:
JP2019172133A
Publication Date:
April 01, 2021
Filing Date:
September 20, 2019
Export Citation:
Assignee:
KDDI CORP
International Classes:
H04N19/577; H04N19/70
Foreign References:
| US20190141333A1 | 2019-05-09 |
Other References:
CHEN, FANGDONG AND WANG, LI: "Non-CE9: Modified enabling condition for DMVR and BDOF", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 14TH MEETING: GENE, vol. JVET-N0162 (version 2), JPN6021013159, 19 March 2019 (2019-03-19), pages 1 - 4, ISSN: 0004510656
UNNO, KYOHEI ET AL.: "Non-CE4: An applying condition of BDOF", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0546 (version 3), JPN6021013161, 5 October 2019 (2019-10-05), pages 1 - 3, ISSN: 0004510657
CHEN, WEI AND HE, YUWEN: "Non-CE4: Unification of DMVR and BDOF enabling conditions", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0415 (version 2), JPN6021013163, 9 October 2019 (2019-10-09), pages 1 - 3, ISSN: 0004510658
CHEN, CHUN-CHI ET AL.: "CE4-related: Harmonized CU-level Condition Check in BDOF and DMVR", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0598 (version 3), JPN6021013164, 30 September 2019 (2019-09-30), pages 1 - 2, ISSN: 0004510659
UNNO, KYOHEI ET AL.: "Non-CE4: An applying condition of BDOF", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0546 (version 3), JPN6021013161, 5 October 2019 (2019-10-05), pages 1 - 3, ISSN: 0004510657
CHEN, WEI AND HE, YUWEN: "Non-CE4: Unification of DMVR and BDOF enabling conditions", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0415 (version 2), JPN6021013163, 9 October 2019 (2019-10-09), pages 1 - 3, ISSN: 0004510658
CHEN, CHUN-CHI ET AL.: "CE4-related: Harmonized CU-level Condition Check in BDOF and DMVR", JOINT VIDEO EXPERTS TEAM (JVET)OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 16TH MEETING: GENEV, vol. JVET-P0598 (version 3), JPN6021013164, 30 September 2019 (2019-09-30), pages 1 - 2, ISSN: 0004510659
Attorney, Agent or Firm:
Curries Patent Business Corporation