Method of coding numbers in binary form

Details Method of coding numbers in binary form Method of coding numbers in binary form

1988-03-28

1990-01-30

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

341 73, 341 75, H03M 734

Patent

active

048976520

ABSTRACT:
A coding method uses a pseudo-logarithmic compression law approximated by a straight line segment curve. Its code word on n+1 binary digits, where n is a positive invariant integer, has a lefthand part made up of a variable number p of binary digits having the same value (1) corresponding to the rank number of the segment concerned in the compression law and a righthand part, which may be absent, determining the interval within the segment concerned. It may be implemented on the basis of a series of counting pulses defining the number to be coded by means of a circuit which comprises a divider circuit having a plurality of division ratios operating on the series of counting pulses, a synchronization circuit which also selects the division ratio of the divider circuit corresponding to the increment between intervals in the segment concerned of the compression law, and a counting circuit operating on the series of pulses delivered by the divider circuit and supplying on parallel outputs the value of the code word corresponding to the number of counting pulses applied to the input of the divider circuit.

REFERENCES:
patent: 3594560 (1971-07-01), Stanley
patent: 3742198 (1973-06-01), Morris
patent: 3825924 (1974-07-01), Montgomery
patent: 4617641 (1986-10-01), Hamada

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