Sequential encoding and decoding of variable word length, fixed

Details Sequential encoding and decoding of variable word length, fixed Sequential encoding and decoding of variable word length, fixed

1977-06-20

1978-09-19

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1324

Patent

active

041157680

ABSTRACT:
Apparatus for converting binary digital data from one form to another according to a variable word length code of fixed rate comprises word position indicating circuitry for indicating predetermined word position states of data in a data storage unit and conversion circuitry for sequentially converting a constant number of input bits at a time into the corresponding number of bits in said other form in dependence upon the contents of the data storage unit and the word position indication. The constant number of bits is less than the number of bits in the longest variable length word in the input data code form. The word position indicating circuitry either generates an updated function representing the current position of the word boundary in the data storage unit or recognizes the boundary from distinctive word ending patterns in the data storage unit.

REFERENCES:
patent: 2973511 (1961-02-01), McLaughlin
patent: 3016527 (1962-01-01), Gilbert et al.
patent: 3172097 (1965-03-01), Imlay
patent: 3274378 (1966-09-01), Crawford et al.
patent: 3691554 (1972-09-01), Marschall
patent: 3810111 (1974-05-01), Patel
patent: 3921143 (1975-11-01), Woodrum
patent: 4032979 (1977-06-01), Rice

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