Method and apparatus for the coding and decoding of digital info

Details Method and apparatus for the coding and decoding of digital info Method and apparatus for the coding and decoding of digital info

1977-10-17

1979-06-26

Smith, Jerry

Communications: electrical

Digital comparator systems

3401461AL, G06F 1112

Patent

active

041594690

ABSTRACT:
The encoder processes M information characters, each of bit length m, followed by k-1 flush out bits, through an (n,k) convolutional encoder. Each resulting output character is stored as one row of an output register matrix. A transmission bit stream is formed by extracting bits from the register on a column by column basis, thereby interleaving the characters.
The decoder fills an input storage basis on a column by column basis, thereby restoring each character in its appropriate row. The characters are sequentially switched to an (n,k) convolutional decoder which outputs the original m bit information character. The characters are, in turn, stored in corresponding rows of an output register matrix, where they are available as recovered data.

REFERENCES:
patent: 3222643 (1965-12-01), Klinkhamer
patent: 3873971 (1975-03-01), En
patent: 3891959 (1975-06-01), Tsuji et al.
patent: 3988677 (1976-10-01), Fletcher et al.
patent: 4055832 (1977-10-01), En

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