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1. (WO2007005060) METHOD AND APPARATUS FOR INCREASING DATA TRANSFER RATES THROUGH A COMMUNICATION CHANNEL
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/005060 International Application No.: PCT/US2006/003853
Publication Date: 11.01.2007 International Filing Date: 02.02.2006
IPC:
H04L 25/493 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
38
Synchronous or start-stop systems, e.g. for Baudot code
40
Transmitting circuits; Receiving circuits
49
using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels
493
by transition coding, i.e. the time-position or direction of a transition being encoded before transmission
Applicants:
APPLE INC. [US/US]; 1 Infinite Loop Cupertino, CA 95014, US (AllExceptUS)
CORNELIUS, William, P. [US/US]; US (UsOnly)
Inventors:
CORNELIUS, William, P.; US
Agent:
PARK, A., Richard; 2820 Fifth Street Davis, CA 95616, US
Priority Data:
11/172,33229.06.2005US
Title (EN) METHOD AND APPARATUS FOR INCREASING DATA TRANSFER RATES THROUGH A COMMUNICATION CHANNEL
(FR) PROCEDE ET APPAREIL POUR AUGMENTER DES DEBITS DE TRANSFERT DE DONNEES PAR UNE VOIE DE COMMUNICATION
Abstract:
(EN) A system for receiving data on a communication channel. The system examines the state of a bit that was previously received on the channel. If the state of the previously received bit was high, the system looks for a falling edge while receiving a subsequent bit on the channel. Otherwise, the system looks for a rising edge while receiving the subsequent bit on the channel. While looking for a rising edge or looking for a falling edge, the system samples a signal on the channel at discrete time steps within a symbol interval, wherein the symbol interval is a time period during which the signal can change states. The specific discrete time step at which the signal changes state is associated with a specific decoded output symbol. Note that the signal can also convey information by not changing states. Also note that not all symbols require the same time to be transmitted, because some symbols can be associated with signal transitions that happen sooner, whereas other symbols can be associated with signal transitions that happen later.
(FR) L'invention concerne un système destiné à recevoir des données par une voie de communication. Le système examine l'état d'un bit antérieurement reçu dans la voie. Si l'état du bit antérieurement reçu est élevé, le système recherche un flanc descendant pendant qu'il reçoit un bit subséquent dans la voie. Autrement, le système recherche un flanc montant pendant qu'il reçoit le bit subséquent dans la voie. Pendant la recherche d'un flanc montant ou la recherche d'un flanc descendant, le système échantillonne un signal dans la voie, selon des pas de temps discrets, à l'intérieur d'un intervalle de symbole, lequel intervalle de symbole est un laps de temps au cours duquel le signal peut changer d'état. Le pas de temps discret spécifique au cours duquel le signal peut changer d'état est associé à un symbole de sortie spécifique décodé. Il est à noter que le signal peut également transmettre des données sans changer d'état, et que tous les symboles n'exigent pas d'être transmis dans le même laps de temps, étant donné que certains symboles peuvent être associés à des transitions de signaux qui surviennent plus tôt tandis que d'autres symboles peuvent être associés à des transitions de signaux qui surviennent plus tard.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (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, HU, IE, IS, IT, LT, LU, LV, MC, NL, 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)
Also published as:
EP1897307JP2008543219CN101204054