Patent AU-2020327342-A1 (AU)
Title: Encoding and decoding method, apparatus and communication system
Inventor: HUO JUNYAN
IPC: H04N19/52
Filed: 2020-09-25
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
Organization 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2021/063270 A1 
08 April 2021 (08.04.2021) W IPO IPCT 
(51) InternationalPatent Classification: (74) Agent: CHINA PAT INTELLECTUAL PROPERTY 
H04N19/70 (2014.01) H04N19/61 (2014.01) OFFICE; 2nd Floor, Zhongguancun Intellectual Property 
(21)InternationalApplicationNumber: Building, Block B, No. 21 Haidian South Road, Haidian, 
PCT/CN2020/l17911 Beijing100080(CN).  
(22) International Filing Date: (81) Designated States (unless otherwise 
indicated, for every 
25 September 2020 (25.09(2020) kind ofnational protection available): AE, AG, AL, AM, 
AO, AT, AU, AZ, BA, BB, BG, BH, EN, BR, BW, BY, BZ, 
(25) Filing Language: English CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, 
(26)PublicationHLanguage: English R, HU, ID, IL, IN, IR, IS, IT, JO, JP, KE, KG, KH, KN, 
(30) Priority Data: KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, 
62/911,166 04 October 2019 (04.10.2019) US ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, 
NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 
(71) Applicant: GUANGDONG OPPO MOBILE SA, SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, 
TELECOMMUNICATIONS CORP., LTD. [CN/CN] TR, TT, TZ, UA, UG, US, UZ, VC, VN, WS, ZA, ZM, ZW.  
No. 18, Haibin Road, Wusha, Chang'an, Dongguan, Guang
dong 523860 (CN). (84) Designated States (unless otherwise indicated, for every 
kind of regional protection available): ARIPO (BW, GH, 
(72) Inventor: HUO, Junyan; No. 18, Haibin Road, Wusha GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
Chang'an, Dongguan, Guangdong 523860 (CN). UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
(54) Title: ENCODING AND DECODING METHOD, APPARATUS AND COMMUNICATION SYSTEM 
S;60 1 
Determine prediction parameters of a current block in a bitstream 
Determine a matrix-based intra prediction (M0P) input sample of the S602 
-crrent blockbased onneighboring samples ofthe current block and the 
prediction paraitIeters 
Set a shftiing offset parameters f) as a secid Fxed value 
--- - - - --- - r 0 
Determne an MP weighting trtrix of he current block based on 
-th e pedtttiotiparameters 
D ietertrne an MIPpredictiontvalue ofbtesetrent block based on teMiP 
weighting matrix, the MIP input sample, the shifting offset parameter 
(ff0). and the shifii number parameter (SW) 
S607, 
Perfaomr an Upsampting press to the MAP prediction value of the 
current block so as to generate intra predicted samples of the current 
block--
FIG.6 
(57) Abstract: The present disclosure relates to method for predicting an image. The method include (i) determining prediction para
meters of a current block in a bitstream; (ii) determining a matrix-based intra prediction (MIP) input sample of the current block based 
on neighboring samples of the current block and the prediction parameters; (iii) setting a shifting number parameter (sW) as a first 
fixed value; (iv) setting a shifting offset parameter (fO) as a second fixed value; and (v) determining an MIP prediction sample of the 
current block based on an MIP weighting matrix, the MIP input sample, the shifting offset parameter (fO), and the shifting number 
O parameter (sW).
W O 2021/063270 A 1 |||11||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 
TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 
MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 
TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 
KM, ML, MR, NE, SN, TD, TG).  
Published: 
- with international search report (Art. 2](3))