Patent SG-11201907090W-A (SG)
Title: Affine motion information derivation
Inventor: LI XIANG
IPC: H04N19/44
Filed: 2018-03-13
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 20 September 2018 (20.09.2018) WIP0 I PCT omit VIII °nolo VIII VIII 0111111 oimIE (10) International Publication Number WO 2018/169923 Al 1108 (51) International Patent Classification: H04N 19/44 (2014.01) H04N 19/54 (2014.01) (21) International Application Number: PCT/US2018/022129 (22) International Filing Date: 13 March 2018 (13.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/471,099 14 March 2017 (14.03.2017) US 15/918,789 12 March 2018 (12.03.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: LI, Xiang; 10574 Gaylemont Ln., San Diego, California 92130 (US). CHEN, Yi-Wen; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHEN, Jianle; 10756 Corte De Tiburon, San Diego, California 92121 (US). CHUANG, Hsiao-Chiang; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). CHIEN, Wei-Jung; 5775 Morehouse Drive, San Diego, Califor- nia 92121-1714 (US). SUN, Yu-Chen; 12519 NE 4th Pl., Bellevue, Washington 98005 (US). KARCZEWICZ, Marta; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (74) Agent: AUSTIN, Shelton W. et al.; Polsinelli LLP, 2049 Century Park East, Suite 2900, Los Angeles, CA 90067 (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, (54) Title: AFFINE MOTION INFORMATION DERIVATION REFERENCE AFFINElempucre AA'12 evegeria BLOCK OF REFERENCE PICTURE 111 0 1106 CURRENT AFFINE TEMPLATE ‘1104 t*j FIG.11B CURRENT BLOCK (CUR) 1102 00 O C (57) : Techniques and systems are provided for deriving one or more sets of affme motion parameters at a decoder. For example, the decoder can obtain video data from an encoded video bitstream. The video data includes at least a current picture and a reference picture. The decoder can determine a set of affine motion parameters for a current block of the current picture. The set of affme motion parameters can be used for performing motion compensation prediction for the current block. The set of affme motion parameters can be determined using a current affme template of the current block and a reference affme template of the reference picture. In some cases, an encoder can determine a set of affme motion parameters for a current block using a current affme template of the current block and a reference affme template of the reference picture, and can generate an encoded video bitstream that includes a syntax item indicating template matching based affme motion derivation mode is to be used by a decoder for the current block. The [Continued on next page] WO 2018/169923 Al MIDEDIMOMOIDEIREEMOMMIMEHOIMMOVOIMIE 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, 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)) encoded video bitstream may not include any affine motion parameters for determining the set of affine motion parameters.