G - Physics – 06 – F
Patent
G - Physics
06
F
363/12, 354/223.
G06F 11/08 (2006.01) G11B 20/18 (2006.01)
Patent
CA 1161565
ABSTRACT OF THE DISCLOSURE A method of error correction in which a first error correcting block is formed of one word included in each of a PCM data series of plural channels in a first arranging state and a first check word for the one word, the PCM data series of plural channels and first check word series are delayed by different times at every channel to be converted to a second arranging state, a second error correcting block is formed of one word included in each of the PCM data series of plural channels and first check word series in the second arranging state and a second check word for the latter one word, the first and second error correcting blocks are formed to be such an error correcting codes that error syndromes are calculated and errors up to K words included in the same block can be corrected by obtaining error locations from the error syndromes, first decoding is carried out for the second error correcting block of transmitted data series, the PCM data series of plural channels and first check word series in the first arranging state are delayed by different times at every channel to be converted to the first arranging state, and thereafter second decoding is carried out for the first error correcting block. The method of error cor- rection comprises the steps of correcting errors up to a predetermined number of words in the second error correcting block during the first decoding adding a pointer indicating an error to every word in a block when error words exceeding the predetermined number are detected under assumption that all words in the block include an error, and calculating an error syndrome from a plurality of words included in the first error correcting block and hence correcting error words of a predetermined number by obtaining error locations based upon the error syndrome during the second decoding.
379913
Odaka Kentaro
Sako Yoichiro
Gowling Lafleur Henderson Llp
Sony Corporation
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