Regenerative decoding of binary data using minimum redundancy co

Details Regenerative decoding of binary data using minimum redundancy co Regenerative decoding of binary data using minimum redundancy co

1977-09-12

1979-09-18

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

340347DD, 358135, H04N 100

Patent

active

041685130

ABSTRACT:
Encoding and decoding between fixed and variable length binary codes to achieve data compression and decompression is performed without the necessity for storing the entire variable length minimum redundancy code format. In encoding, data is compressed by generating a minimum redundancy code of a bit length and binary value inversely proportional to the probability of an occurrence of the fixed length binary message from which the minimum redundancy binary code symbol is derived. The compressed binary symbols are transmitted or stored in serial form. In decoding, data is decompressed by sequentially generating portions of threshold binary symbols in the minimum redundancy code and comparing with corresponding portions of a received or recovered binary symbol as it is shifted through the decoder. The comparison results define the bit length and binary value of the binary symbol without the necessity for ever storing the binary symbol in its entirety. This technique of compression and decompression is especially useful for the transmission or storage of digital image data where the probability of occurrence of particular data information is predictable.

REFERENCES:
patent: 3560639 (1971-02-01), Centanni
patent: 3813485 (1974-05-01), Arps
patent: 4035837 (1977-07-01), Starck

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