Title:
TRANSFORMATION METHOD, ENCODER, DECODER, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/134327
Kind Code:
A1
Abstract:
Disclosed are a transformation method, an encoder, a decoder, and a storage medium. The method comprises: determining a prediction mode parameter of the current block; when the prediction mode parameter indicates that the current block determines an intra-frame prediction value by means of matrix-based intra-frame prediction (MIP), determining a MIP parameter; determining the intra-frame prediction value of the current block according to the MIP parameter, and calculating a prediction difference between the current block and the intra-frame prediction value; when the current block uses a low-frequency non-separable secondary transform (LFNST), determining, according to the MIP parameter, an LFNST transform kernel used by the current block, setting an LFNST index number, and writing same into a video code stream; and performing transformation processing on the prediction difference by using the LFNST transform kernel.
Inventors:
HUO JUNYAN (CN)
LI XINWEI (CN)
QIAO WENHAN (CN)
MA YANZHUO (CN)
WAN SHUAI (CN)
YANG FUZHENG (CN)
LI XINWEI (CN)
QIAO WENHAN (CN)
MA YANZHUO (CN)
WAN SHUAI (CN)
YANG FUZHENG (CN)
Application Number:
PCT/CN2019/130157
Publication Date:
July 08, 2021
Filing Date:
December 30, 2019
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H04N19/50
Foreign References:
| US20190306526A1 | 2019-10-03 | |||
| CN109076243A | 2018-12-21 | |||
| CN107925763A | 2018-04-17 |
Other References:
JONATHAN PFAFF , TOBIAS HINZ , PHILLIP HELLE , PHILLIP MERKLE , BJORN STALLENBERGER , MICHAEL SCHAFER , DETLEV MARPE , THOMAS WIEG: "Non-CE3: Harmonization of 8-Bit MIP with Unified-MPM and LFNST", 15. JVET MEETING; 20190703 - 20190712; GOTHENBURG; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), no. JVET-O0485-r2, 1 July 2019 (2019-07-01), Gothenburg, pages 1 - 4, XP030219703
K. NASER (INTERDIGITAL), F. LE LÉANNEC, T. POIRIER (INTERDIGITAL): "Non-CE6 Interaction between Implicit MTS and LFNST and MIP (JVET- O0529)", 15. JVET MEETING; 20190703 - 20190712; GOTHENBURG; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), 25 June 2019 (2019-06-25), Gothenburg, pages 1 - 4, XP030219824
See also references of EP 4087253A4
K. NASER (INTERDIGITAL), F. LE LÉANNEC, T. POIRIER (INTERDIGITAL): "Non-CE6 Interaction between Implicit MTS and LFNST and MIP (JVET- O0529)", 15. JVET MEETING; 20190703 - 20190712; GOTHENBURG; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), 25 June 2019 (2019-06-25), Gothenburg, pages 1 - 4, XP030219824
See also references of EP 4087253A4
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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