H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 25/06 (2006.01) H04L 25/49 (2006.01) H04M 1/78 (2006.01) H04M 11/06 (2006.01)
Patent
CA 2262998
An improved DC compensation method for use in conjunction with telephony signalling. The method includes defining a frame that includes at least two n-bit codewords. An unsigned codeword is then identified within the frame by applying a rule to the codewords in the defined frame. Next, a sign bit is appended to the unsigned codeword, thereby producing a DC compensating codeword. The sign bit is selected based upon a weighting function of the linear values associated with previously transmitted codewords. The remaining unsigned codewords in the frame are assigned sign bits from user data.
Procédé amélioré de compensation de CC à utiliser conjointement avec la signalisation téléphonique. Ledit procédé consiste à définir une trame qui comprend au moins deux mots codés à n bits. Un mot codé sans signe est ensuite identifié au sein de la trame par l'application d'une règle aux mots codés dans ladite trame. Un bit de signe est ensuite ajouté au mot codé sans signe, ce qui permet de produire un mot codé de compensation de CC. Le bit de signe est choisi sur la base d'une fonction de pondération des valeurs linéaires associées aux mot codés préalablement transmis. Des bits de signe sont attribué à partir de données utilisateur aux mots codés sans signe restants de la trame.
Lery Scott A.
Norrell Andrew
Parizhsky Vladimir G.
Waldron Mark A.
3com Corporation
Smart & Biggar
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