H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/103, 363/12
H03M 13/15 (2006.01) G11B 20/18 (2006.01)
Patent
CA 1184678
ABSTRACT OF THE DISCLOSURE A method of error correction is disclosed in which a first error correcting block consisting of one word contained in each of pulse code modulated (PCM) data sequences in a plurality of channels in a first arrangement state and first check words associated therewith is formed, the PCM data sequences in the plurality of channels and the first check word sequences are delayed by different delay times at every channel to be a second arrangement state, a second error correcting block consisting of one word contained in each of the PCM data sequences in the plurality of channels and the first check word sequences, each being in the second arrangement state and second check words associated therewith. In this case, the method of error correction includes the steps of decoding the second error correcting block in a first stage, delaying the PCM data sequences in the plurality of channels and the first check word sequences, each being in the second arrangement state by different delay times at every channel so as to put the same into the first arrangement state, and decoding thereafter the first error correcting block in the next stage, in which decoding in the first stage includes the steps of correcting at least one word error contained in the second error correcting block, and detecting errors more than two words, and adding pointers of two kinds, which can dis- tinguish the correction of one word error from the detection of the errors more than two words, to each of the words, while the decoding in the next stage includes the steps of correcting errors of words contained in the first error correcting block, and discriminating the number and arrange- ment state of the pointers of two kinds contained in the first error correcting block during the error correcting process, so that on the basis of results of the discrimination, the error detection is prevented from being missed and the erroneous correction is avoided.
406845
Odaka Kentaro
Sako Yoichiro
Gowling Lafleur Henderson Llp
Sony Corporation
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