Coded data generation or conversion – Digital code to digital code converters – With error detection or correction
Patent
1988-12-27
1990-10-23
Shoop, Jr., William M.
Coded data generation or conversion
Digital code to digital code converters
With error detection or correction
341 50, 371 30, 371 377, H03M 1300
Patent
active
049655760
ABSTRACT:
In an encoder for use in encoding each input signal unit of N bits into each of error correcting codewords, each input signal unit is grouped into a plurality of parts which have bit lengths N1 and N2 in consideration of a transmission rate on a transmission path and which are individually encoded into partial encoded codewords which individually include redundancy signals, respectively. The partial encoded codewords may have different error correction ability and different code lengths. The partial encoded codewords are combined together into each of the error correcting codeword which may be transmitted to the transmission path at a transmission rate close to an allowable transmission rate of the transmission path. A decoder decodes each error correcting codeword into each of output signal units by dividing each error correcting codeword into divided codewords and by individually decoding the divided codewords.
REFERENCES:
patent: 4151562 (1979-04-01), Tregay
patent: 4422171 (1983-12-01), Wortley et al.
patent: 4541095 (1985-09-01), Vries
Noda Seiichi
Watanabe Masayoshi
NEC Corporation
Shoop Jr. William M.
Young Brian K.
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