Title:
HIGH PRECISION TRANSFORM AND QUANTIZATION FOR IMAGE AND VIDEO CODING
Document Type and Number:
WIPO Patent Application WO/2021/052355
Kind Code:
A1
Abstract:
Methods, systems, and devices for high-precision transform and quantization for image and video coding are described. A example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream representation of the video, that the conversion comprises an application of a transform to the current block, and performing, based on the determining, the conversion, wherein a bit-shifting operation of a scaling process for transform coefficients associated with the transform is based on whether the current block is coded with a block-based differential pulse code modulation (BDPCM) mode.
Inventors:
XU JIZHENG (US)
ZHANG KAI (US)
ZHANG LI (US)
LIU HONGBIN (CN)
DENG ZHIPIN (CN)
WANG YUE (CN)
ZHANG KAI (US)
ZHANG LI (US)
LIU HONGBIN (CN)
DENG ZHIPIN (CN)
WANG YUE (CN)
Application Number:
PCT/CN2020/115533
Publication Date:
March 25, 2021
Filing Date:
September 16, 2020
Export Citation:
Assignee:
BEIJING BYTEDANCE NETWORK TECH CO LTD (CN)
BYTEDANCE INC (US)
BYTEDANCE INC (US)
International Classes:
H04N19/102; H04N19/124
Domestic Patent References:
| WO2015057438A1 | 2015-04-23 |
Foreign References:
| CN105144718A | 2015-12-09 | |||
| CN106464885A | 2017-02-22 | |||
| US20150264376A1 | 2015-09-17 | |||
| EP4013054A1 | 2022-06-15 |
Other References:
TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU: "Infrastructure of audiovisual services – Coding of moving video，High efficiency video coding", ITU-T H.265, 30 June 2019 (2019-06-30), CH, pages 1 - 696, XP009534967
H. JANG (LGE), J. NAM, N.PARK, J. CHOI, S. KIM, J. LIM (LGE),: "Comments on transform quantization bypassed mode", 15. JVET MEETING; 20190703 - 20190712; GOTHENBURG; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), 5 July 2019 (2019-07-05), XP030219974
BROSS B ET AL.: "Versatile Video Coding (Draft 6", XP030293932
See also references of EP 4018648A4
H. JANG (LGE), J. NAM, N.PARK, J. CHOI, S. KIM, J. LIM (LGE),: "Comments on transform quantization bypassed mode", 15. JVET MEETING; 20190703 - 20190712; GOTHENBURG; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), 5 July 2019 (2019-07-05), XP030219974
BROSS B ET AL.: "Versatile Video Coding (Draft 6", XP030293932
See also references of EP 4018648A4
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (CN)
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