G - Physics – 11 – B
Patent
G - Physics
11
B
354/71
G11B 5/09 (2006.01) G06F 11/10 (2006.01) G11B 20/18 (2006.01)
Patent
CA 1187998
ABSTRACT OF THE INVENTION A pulse code modulation signal processor for extracting data words from a serial PCM data block also containing an error detection and correction code comprises: a serial-to-parallel. converter to convert this serial PCM data block into a parallel format such that the outputs of the serial-to-parallel converter each contains, in parallel, a different one of the data words and the error detection and correction code; a block error detector connected to the output terminals of the serial-to-parallel con- verter for forming an error pointer indicating which of the words at the output of the serial-to-parallel converter contains an error; a de-interleaver also connected to the output terminals of the serial-to-parallel converter for adding different delays to the data words such that all of the data words appear synchro- nously at the de-interleaver output; a syndrome generator con- nected to the output of the de-interleaver for forming an auxil- iary error pointer indicating whether any of the data words of the output of the de-interleaver contains an error and, if so, which of those data words contains the error; an error pointing delay circuit for combining the error pointer and the auxiliary error pointer to form data word error pointers each corresponding to a different data word and indicating whether the corresponding data word contains an error, the error pointing delay circuit -23- also synchronizing each data word error pointer with its corresponding data word, and an error detection and correction circuit which uses the data word error pointers.
385985
Kirby Eades Gale Baker
Tokyo Shibaura Denki Kabushiki Kaisha
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