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1. (WO2018127695) CODEC
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Pub. No.: WO/2018/127695 International Application No.: PCT/GB2018/050013
Publication Date: 12.07.2018 International Filing Date: 04.01.2018
IPC:
H04N 19/53 (2014.01) ,H04N 19/86 (2014.01) ,H04N 19/513 (2014.01)
[IPC code unknown for H04N 19/53][IPC code unknown for H04N 19/86][IPC code unknown for H04N 19/513]
Applicants:
FORBIDDEN TECHNOLOGIES PLC [GB/GB]; Tuition House 27-37 St. George's Road Wimbledon London SW19 4EU, GB
Inventors:
STREATER, Stephen; GB
Agent:
BROOKES IP; Windsor House 6-10 Mount Ephraim Road Tunbridge Wells Kent TN1 1EE, GB
Priority Data:
1700086.004.01.2017GB
Title (EN) CODEC
(FR) CODEC
Abstract:
(EN) A method for encoding and decoding a video stream comprising dividing the video stream into a first Key frame, and subsequent chunks each comprising 2n frames, each chunk including a Key frame and 2n-1 Delta (Dx) frames, where x is a positive integer and denotes the level of the Delta frame, and where 2x-1 denotes the number of Delta frames at that level in the chunk; the method including the step of constructing Dx level frames from adjacent Earlier and Later Dy frames, (where y < x and where for y = 0, Dy is a Key frame), for all frames in a chunk where x > 0; wherein the constructing step includes: dividing the frame into Motion Regions representing groups of pixels; determining a pixel group in an Earlier (E: Dy) and later (L: Dy) frame that is a best match for a pixel group in a Motion Region of a Current (C: Dx) frame; determining motion vectors for the best matches for Motion Regions, or by intra-frame compression of frame C. The method is characterised by eliminating unnecessary information when building a bitstream such that as x increases, motion vector and other data relating to a combination of Dx frames (more numerous than the Dx-1 frames) is represented by a quantity of data in the bitstream that, for a typical video, increases at a much lower rate than the quantity of frames in Dx compared to the quantity of frames in Dx -1.
Designated States: 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)