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1. (WO2010026351) METHOD FOR ENTROPICALLY TRANSCODING A FIRST BINARY DATA STREAM INTO A SECOND COMPRESSED BINARY DATA STREAM, AND CORRESPONDING COMPUTER PROGRAM AND IMAGE RECORDING DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2010/026351    International Application No.:    PCT/FR2009/051678
Publication Date: 11.03.2010 International Filing Date: 04.09.2009
IPC:
H04N 7/26 (2006.01)
Applicants: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES [FR/FR]; 25 rue Leblanc Bâtiment "Le Ponant D" F-75015 Paris (FR) (For All Designated States Except US).
ALACOQUE, Laurent [FR/FR]; (FR) (For US Only)
Inventors: ALACOQUE, Laurent; (FR)
Agent: BONNET, Michel; (FR)
Priority Data:
0804893 05.09.2008 FR
Title (EN) METHOD FOR ENTROPICALLY TRANSCODING A FIRST BINARY DATA STREAM INTO A SECOND COMPRESSED BINARY DATA STREAM, AND CORRESPONDING COMPUTER PROGRAM AND IMAGE RECORDING DEVICE
(FR) PROCEDE DE TRANSCODAGE ENTROPIQUE D'UN PREMIER TRAIN DE DONNEES BINAIRES EN UN SECOND TRAIN DE DONNEES BINAIRES COMPRESSE, PROGRAMME D'ORDINATEUR ET DISPOSITIF DE CAPTURE D'IMAGES CORRESPONDANTS
Abstract: front page image
(EN)The invention relates to a method for entropically transcoding a first binary data stream, consisting of words to be transcoded, into a second compressed binary data stream, which uses a predetermined entropic code, having variable encoded word length, to transcode each word of the first binary data stream into a transcoded word. On the basis of a predetermined least significant bit number, denoted as B, the method comprises the application of the following steps to each word (“S0000010110”) of the first binary data stream: subdividing (106) the word into first and second sub-words, the first sub-word (“10”) comprising the least significant B bits of the word and the second sub-word (“S00000101”) comprising the other most significant bits of the word; using (108) the predetermined entropic code on the second sub-word to obtain a transcoded second sub-word (“0001s01”); and obtaining (110) said transcoded word (“0001s0110”) through the concatenation of the first sub-word (“10") and the transcoded second sub-word (“0001s01”).
(FR)Ce procédé de transcodage entropique d'un premier train de données binaires constitué de mots à transcoder en un second train de données binaires compressé utilise un code entropique prédéterminé à longueur variable des mots codés pour transcoder chaque mot du premier train de données binaires en un mot transcodé. Sur la base d'un nombre prédéterminé noté B de bits de poids faibles, il comporte l'application des étapes suivantes à chaque mot («S0000010110») du premier train de données binaires : subdivision (106) du mot en des premier et second sous-mots, le premier sous-mot («10») comportant les B bits de poids faibles du mot et le second sous-mot («S00000101») comportant les autres bits de poids fort du mot, application (108) du code entropique prédéterminé au second sous-mot pour obtenir un second sous-mot transcodé («0001s01»), et obtention (110) dudit mot transcodé («0001s0110») par concaténation du premier sous-mot («10»)et du second sous-mot transcodé («0001s01»).
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: French (FR)
Filing Language: French (FR)