Patent AU-2021257900-B2 (AU)
Title: Adaptive colour transform related signalling for both of CU level and TU level
Inventor: CHEN LIEN-FEI
IPC: H04N7/24
Filed: 2021-06-01
Granted: 2023-03-02
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
(1) Organization 11111111111111111111111I1111111111111ii111111Iiiiili 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2021/252222 Al 
16 December 2021 (16.12.2021) WIPOIPCT 
(51) InternationalPatent Classification: Park Boulevard, Palo Alto, California 94306 (US). LIU, 
H04N19/12 (2014.01) Shan; c/o TENCENT AMERICA LLC, 2747 Park Boule
(21) International Application Number: vard, Palo Alto, California 94306 (US).  
PCT/US2021/035159 (74) Agent: RABENA, John F. et al.; SUGHRUE MION, 
(22) International Filing Date: PLLC, 2000 Pennsylvania Ave., N.W., Suite 900, Washing
01 June 2021 (01.06.2021) ton, District of Columbia 20006 (US).  
(25) Filing Language: English (81) Designated States (unless otherwise indicated, 
for every 
kind ofnational protection available): AE, AG, AL, AM, 
(26) Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
(30) Priority Data: DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, 
63/037,170 10 June 2020 (10.06.2020) US HR, HU, ID, IL, IN, IR, IS, IT, JO, JP, KE, KG, KH, KN, 
17/319,328 13May2021(13.05.2021) US KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, 
(71) Applicant: TENCENT AMERICA LLC [US/US]; 2747 ME, MG, MK, MN, MW MX, MY, MZ, NA, NG, NI, NO, 
Park Boulevard, Palo Alto, California 94306 (US). NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 
(72) Inventors: CHEN, Lien-Fei; c/o TENCENT AMERICA SA, SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, 
LLC, 2747 Park Boulevard, Palo Alto, California 94306 TR, TT, TZ, UA, UG, US, UZ, VC, VN, WS, ZA, ZM, 
ZW.  
(US). LI, Xiang; c/o TENCENT AMERICA LLC, 2747 
(54) Title: ADAPTIVE COLOUR TRANSFORM RELATED SIGNALLING FOR BOTH OF CU LEVEL AND TU LEVEL 
FIG. I 
*---------------
104 
(57) Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to 
Cjperform obtaining video data, obtaining a coding unit (CU) block, determining whether a flag of the CU block is set to a predetermined 
flag condition, determining whether a tree type of the CU block is set to a predetermined tree type, determining whether to signal an 
adaptive color transform (ACT) flag based on any of whether the flag of the CU block is set to the predetermined flag condition and 
whether the tree type of the CU block is set to the predetermined tree type, and coding the video data based on a whether the ACT 
flag is signaled.  
el
W O 2021/252222 A 1 ||||IIII |I |IIIIII| II|I|||III||I|| | | li|i||i|| | | | 
(84) Designated States (unless otherwise indicated, for every 
kind of regional protection available): ARIPO (BW, GH, 
GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
EE, ES, Fl, 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 21(3))