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1. (WO2009056867) ADAPTIVE TUNING OF THE PERCEPTUAL MODEL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2009/056867    International Application No.:    PCT/GB2008/050804
Publication Date: 07.05.2009 International Filing Date: 09.09.2008
IPC:
G10L 19/00 (2006.01), G10L 19/02 (2006.01), H04B 1/66 (2006.01)
Applicants: CAMBRIDGE SILICON RADIO LTD [GB/HN]; Unit 400, Cambridge Science Park, Milton Road, Cambridge Cambridgeshire CB4 0WH (GB) (For All Designated States Except US).
ZAVAREHEI, Esfandiar [IR/GB]; (GB) (For US Only).
HARGREAVES, David [GB/GB]; (GB) (For US Only)
Inventors: ZAVAREHEI, Esfandiar; (GB).
HARGREAVES, David; (GB)
Agent: WALLIS, Helen; 90 High Holborn, London Greater, London WC1V 6XX (GB)
Priority Data:
0721376.2 31.10.2007 GB
Title (EN) ADAPTIVE TUNING OF THE PERCEPTUAL MODEL
(FR) ACCORD ADAPTATIF DE MODÈLE PERCEPTUEL
Abstract: front page image
(EN)Methods of encoding a signal using a perceptual model are described in which a signal to mask ratio parameter within the perceptual model is tuned. The signal to mask ratio parameter is tuned based ona function ofthe bitrate of the part of the signal which has already been encoded and the target bitrate for the encoding process.The tuned signal to 5 mask ratio parameter is used to compute a masking threshold for the signal which is then used to quantise the signal.
(FR)L'invention concerne des procédés de codage d'un signal à l'aide d'un modèle perceptuel, dans lesquels un paramètre de rapport signal/masque à l'intérieur du modèle perceptuel est accordé. Le paramètre de rapport signal/masque est accordé selon une fonction du débit binaire de la partie du signal qui a déjà été codée et du débit binaire cible pour le processus de codage. Le paramètre de rapport signal/masque accordé est utilisé pour calculer un seuil de masquage pour le signal, qui est ensuite utilisé pour quantifier ledit signal.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, 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, 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, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)