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1. (WO2017176180) METHODS, ENCODER, AND TRANSCODER FOR TRANSCODING
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2017/176180 International Application No.: PCT/SE2016/050290
Publication Date: 12.10.2017 International Filing Date: 06.04.2016
IPC:
H04N 19/48 (2014.01) ,H04N 19/12 (2014.01) ,H04N 19/176 (2014.01) ,H04N 19/40 (2014.01) ,H04N 19/46 (2014.01) ,H04N 19/70 (2014.01) ,H04N 21/2343 (2011.01) ,H04N 21/235 (2011.01)
[IPC code unknown for H04N 19/48][IPC code unknown for H04N 19/12][IPC code unknown for H04N 19/176][IPC code unknown for H04N 19/40][IPC code unknown for H04N 19/46][IPC code unknown for H04N 19/70]
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
20
Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23
Processing of content or additional data; Elementary server operations; Server middleware
234
Processing of video elementary streams, e.g. splicing of video streams or manipulating MPEG-4 scene graphs
2343
involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
20
Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
23
Processing of content or additional data; Elementary server operations; Server middleware
235
Processing of additional data, e.g. scrambling of additional data or processing content descriptors
Applicants:
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE/SE]; Torshamnsgatan 23 164 83 Stockholm, SE
Inventors:
SAMUELSSON, Jonatan; SE
SJÖBERG, Rickard; SE
RUSERT, Thomas; SE
ANDERSSON, Kenneth; SE
Agent:
EGRELIUS, Fredrik; SE
Priority Data:
Title (EN) METHODS, ENCODER, AND TRANSCODER FOR TRANSCODING
(FR) PROCÉDÉS, CODEUR ET TRANSCODEUR DESTINÉS À UN TRANSCODAGE
Abstract:
(EN) The present invention relates to an encoder, transcoder and a method for transcoding a bitstream representing an original video source from an input video format to an output video format. The method comprises receiving the bitstream with the input video format and side information related to the video. Decode the side information to generate transcoding guiding information, estimate a representation of the received bitstream and transform coefficients with a second video format based on the received bit stream and the generated transcoding guiding information, determining a first set of transform coefficients from the estimated transform coefficients wherein the first set captures the main characteristics of the original transform coefficients, determining a second set of transform coefficients from the side information wherein the set corresponds to same positioning within a transform block as the transform coefficients of the first set and adding the second set of transform coefficients to the first set of the transform coefficients, to create refined transform coefficients that better captures the characteristics of the original transform coefficients and encode the estimated representation of the received bitstream with the second video format using the created refined transform coefficients.
(FR) La présente invention concerne un codeur, un transcodeur et un procédé servant au transcodage d'un train de bits représentant une source vidéo originale à partir d'un format vidéo d'entrée vers un format vidéo de sortie. Le procédé consiste à recevoir le train de bits au moyen du format vidéo d'entrée et des informations annexes relatives à la vidéo. Le procédé consiste en outre à décoder les informations annexes en vue de générer des informations de guidage de transcodage, à estimer une représentation du train de bits reçu et des coefficients de transformation au moyen d'un second format vidéo sur la base du train de bits reçu et des informations de guidage de transcodage générées, à déterminer un premier ensemble de coefficients de transformation à partir des coefficients de transformation estimés, le premier ensemble capturant les caractéristiques principales des coefficients de transformation originaux, à déterminer un second ensemble de coefficients de transformation à partir des informations annexes, l'ensemble correspondant au même positionnement dans un bloc de transformation que les coefficients de transformation du premier ensemble, et à ajouter le second ensemble de coefficients de transformation au premier ensemble des coefficients de transformation, en vue de créer des coefficients de transformation affinés qui capturent mieux les caractéristiques des coefficients de transformation originaux et codent la représentation estimée du train de bits reçu au moyen du second format vidéo à l'aide des coefficients de transformation affinés créés.
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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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 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)