Patent SG-11201906286Q-A (SG)
Title: Deriving motion vector information at a video decoder
Inventor: CHEN YI-WEN
IPC: H04N19/577
Filed: 2018-02-21
Abstract: WO 18/ 15 66 28 Al FIG. 21 ( -430 ( -432 INVERSE QUANTIZE AND TRANSFORM RESIDUAL DATA COMBINE RESIDUAL DATA WITH PREDICTION BLOCK (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 30 August 2018 (30.08.2018) WIPO I PCT oimiolollm °nolo HE OH o111110 oimIE (10) International Publication Number WO 2018/156628 Al (51) International Patent Classification: H04N 19/51 (2014.01) H04N 19/573 (2014.01) H04N 19/44 (2014.01) H04N 19/577 (2014.01) H04N 19/583 (2014.01) H04N 19/109 (2014.01) (21) International Application Number: PCT/US2018/019018 (22) International Filing Date: 21 February 2018 (21.02.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/461,729 21 February 2017 (21.02.2017) US 62/463,266 24 February 2017 (24.02.2017) US 62/472,919 17 March 2017 (17.03.2017) US 15/900,649 20 February 2018 (20.02.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). = (72) Inventors: CHEN, Yi-Wen; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHIEN, Wei-Jung; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHUANG, Hsiao-Chiang; 5775 Morehouse Dri- ve, San Diego, California 92121-1714 (US). CHEN, Jian- le; 10756 Corte De Tiburon, San Diego, California 92130 (US). LI, Xiang; 10574 Gaylemont Lane, San Diego, Cal- ifornia 92130 (US). KARCZEWICZ, Marta; 5775 More- house Drive, San Diego, California 92121-1714 (US). SUN, Yu-Chen; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (74) Agent: DAWLEY, Brian R.; Shumaker & Sieffert, PA., 1625 Radio Drive, Suite 100, Woodbury, Minnesota 55125 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, 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, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, 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, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (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, (54) Title: DERIVING MOTION VECTOR INFORMATION AT A VIDEO DECODER (57) : An example device for decoding video data includes a memory ( -420 configured to store video data, and a video decoder implemented in circuitry and configured to determine that motion information of a current block of the video data is to be derived using decoder-side motion vector derivation (DMVD), de- r -422 termine a pixels clue for the current block, the pixels clue comprising pixel data obtained from one or more groups of previously decoded pixels, derive the motion information for the current block according to DMVD from the pixels clue, and decode the current block using the motion information. The video decoder may generate the pixels clue using multiple hypothesis predictions from multiple mo- 7426 tion compensated blocks. The video decoder may determine an inter-prediction direction for the motion information according to matching costs between differ- ent prediction directions. The video decoder may refine the motion information using a calculated matching cost for the pixels clue. PREDICT CURRENT BLOCK USING MOTION INFORMATION ENTROPY DECODE MODE INDICATION AND QUANTIZED TRANSFORM COEFFICIENTS DETERMINE TO USE DMVD FOR CURRENT BLOCK DETERMINE PIXELS CLUE FOR CURRENT BLOCK DERIVE MOTION INFORMATION USING PIXELS CLUE / 424 ( -428 [Continued on next page] WO 2018/156628 Al MIDEDIMOMOIDEIREEMOMOMOIEHIMEN UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 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. 21(3))