Device and method for carrying out reed-solomon encoding

H - Electricity – 03 – M

Patent

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Details

H03M 13/00 (2006.01) H03M 7/00 (2006.01) H03M 13/15 (2006.01) H04L 1/00 (2006.01) H04L 1/20 (2006.01) H04L 12/56 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2252182

In a Reed-Solomon encoding device which produces, for example, a Reed-Solomon code of 4 bytes for a data signal of 16 bytes, the Reed-Solomon encoding device includes a signal separating circuit (100) which separates the input signal into two signals A and B which are successively outputted in a time division fashion. In synchronism with the output of these signals, an octal counter (1) is counted up. In response to the two separated signals outputted from the signal separating circuit (100), coefficients of respective terms of a remainder obtained by dividing the data signal by a generator polynomial are classified into even-number order ones and odd-number order ones to be calculated in parallel. The even-number order coefficients and the odd-number order coefficients are supplied to selectors (2) and (3) as signals C and D, respectively. The selectors (2) and (3) output the signals from the signal separating circuit (100) when the counter (1) has a count value between 0 and 5 and the signals C and D when the count value is 6 or 7.

L'invetion est un dispositif de codage de Reed-Solomon servant à produire, par exemple, un code de Reed-Solomon de 4 octets pour un signal de données de 16 octets, ce dispositif de codage incluant un circuit séparateur de signaux (100) qui sépare le signal d'entrée en deux signaux A et B, lesquels sont transmis successivement en multiplexage temporel. Un compteur octal (1) est mis en mode de comptage progressif en synchronisme avec la transmission de ces signaux. En réponse aux deux signaux séparés produits par le circuit séparateur de signaux (100), les coefficients des termes respectifs du résidu obtenu en divisant le signal de données par un polynôme générateur sont classés en coefficients d'ordre pair et en coefficients d'ordre impair à calculer en parallèle. Les coefficients d'ordre pair et les coefficients d'ordre impair sont transmis à des sélecteurs (2) et (3) sous la forme de signaux C et D respectivement. Ces sélecteurs (2) et (3) transmettent les signaux provenant du circuit séparateur de signaux (100) quand le compte indiqué par le compteur (1) se trouve entre 0 et 5, et les signaux C et D quand ce compte est 6 ou 7.

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