Decoding of a data signal transmitted in a television system

Details Decoding of a data signal transmitted in a television system Decoding of a data signal transmitted in a television system

H - Electricity

04

N

H04N 7/085 (2006.01) H04N 7/035 (2006.01) H04N 7/088 (2006.01) H04N 11/16 (2006.01) H04N 5/44 (2006.01) H04N 7/00 (2006.01)

Patent

CA 2180023

In a method of decoding a data signal (WSS) having at least a startcode or sync word section (SC) and a data section (AR..R), the data signal is converted (ADC) into a sequence of multi-bit samples having at least a startcode or sync word section (SC) and a data section (AR..R). The sequence of multi-bit samples is processed (11A) to obtain a word sync signal (WS) indicating synchronization information. A disturbance measurement signal (T) is obtained (19) from at least the startcode or sync word section (SC) of the sequence of multi-bit samples. Finally, the data section (AR..R) of the sequence of multi-bit samples is code demodulated (13A) in response to the word sync signal (WS) in dependence upon the disturbance measurement signal (T) to obtain a demodulated data signal.

Dans un procédé de décodage d'un signal de données (WSS) possédant au moins un code de départ ou section de mots de synchronisation (SC) et une section de données (AR..R), le signal de données est converti (ADC) en une séquence d'échantillons de bits multiples possédant au moins un code de départ ou une section de mots de synchronisation (SC) et une section de données (AR..R). La séquence d'échantillons de bits multiples est traitée (11A), afin d'obtenir un signal de synchronisation de mots (WS) indiquant l'information de synchronisation. Un signal de mesure de perturbation (T) s'obtient (19) à partir au moins du code de départ ou de la section de mots de synchronisation (SC) de la séquence d'échantillons de bits multiples. Enfin, la section de données (AR..R) de la séquence d'échantillons de bits multiples est démodulée par code (13A) en réaction au signal de synchronisation de mots (WS) en fonction du signal de mesure de perturbation (T), afin d'obtenir un signal de données démodulé.

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