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1. (WO2001039456) GRAY ENCODING FOR HIERARCHICAL QAM TRANSMISSION SYSTEMS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2001/039456    International Application No.:    PCT/US2000/032011
Publication Date: 31.05.2001 International Filing Date: 22.11.2000
Chapter 2 Demand Filed:    22.06.2001    
IPC:
H04L 27/34 (2006.01)
Applicants: THOMSON LICENSING S.A. [FR/FR]; 46, quai Alphonse Le Gallo, F-92648 Boulogne Cedex (FR) (For All Designated States Except US).
SETTLE, Timothy, Forrest [US/US]; (US) (For US Only).
KRAUSS, Thomas, Peter [US/US]; (US) (For US Only).
RAMASWAMY, Kumar [IN/US]; (US) (For US Only)
Inventors: SETTLE, Timothy, Forrest; (US).
KRAUSS, Thomas, Peter; (US).
RAMASWAMY, Kumar; (US)
Agent: TRIPOLI, Joseph, S.; Thomson Multimedia Licensing Inc., P.O. Box 5312, Princeton, NJ 08540 (US)
Priority Data:
60/167,024 23.11.1999 US
Title (EN) GRAY ENCODING FOR HIERARCHICAL QAM TRANSMISSION SYSTEMS
(FR) CODAGE GRAY POUR SYSTEMES D'EMISSION PAR MODULATION D'AMPLITUDE EN QUADRATURE HIERARCHIQUE
Abstract: front page image
(EN)A hierarchical QAM system allows the transmission of different sources by embedding the relative constellation points. At the transmitter the constellations generated by the different sources are remapped by a grey coder and then combined. At the receiver, the different source data are decoded by using a corresponding grey code demapper.
(FR)La présente invention concerne un système de modulation d'amplitude en quadrature hiérarchique qui permet d'émettre différentes sources par l'inclusion des points de constellation relatifs. Au niveau de l'émetteur, les constellations générées par les différentes sources sont remappées par un codeur Gray puis combinées. Au niveau du récepteur, on décode les différentes données source en utilisant un démappeur de code Gray.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)