Method and apparatus for encoding digital with two error correct

Details Method and apparatus for encoding digital with two error correct Method and apparatus for encoding digital with two error correct

1981-02-23

1983-08-09

Malzahn, David H.

Excavating

G06F 1110

Patent

active

043982921

ABSTRACT:
Successive data words are distributed to a plurality of respective channels to form successive data blocks, each data block being comprised of the data words in the plural channels. A first error correcting code is generated as a function of the words included in the data block, this first error correcting code being adapted for use in correcting at least one word which may be erroneous in the data block, as when the data block subsequently is received or reproduced. The data words included in the data block are selectively delayed, by different respective time delays, to form a time-interleaved data block comprised of time-interleaved data words. A second error correcting code is generated as a function of the words included in the time-interleaved data block, this second error correcting code being adapted for use in correcting at least one word which may be erroneous in the time-interleaved data block, as when the time-interleaved data block subsequently is received or reproduced. The first and second error correcting codes and the time-interleaved data block are combined to form a transmission block which may be transmitted or recorded on a suitable record medium.

REFERENCES:
patent: 3745528 (1973-07-01), Patel
patent: 4206440 (1980-06-01), Doi et al.
patent: 4214228 (1980-07-01), Nara et al.
patent: 4238852 (1980-12-01), Iga et al.
patent: 4306305 (1981-12-01), Doi et al.

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