Data companding method and data compressor/expander

Details Data companding method and data compressor/expander Data companding method and data compressor/expander

1990-04-26

1991-09-10

Shoop, Jr., William M.

Coded data generation or conversion

Digital code to digital code converters

Byte length changed

341 95, H03M 750

Patent

active

050477684

ABSTRACT:
A data companding method instantaneously compands the 14-bit digital audio signals to be outputted from a satellite broadcast receiver and so on is realized with the given conversion rule, which has a superior companding characteristics across the whole input range of the 14-bit data with SN being not deteriorated as compared with the 14-10 near-instantaneous companding law at the satellite broadcast transmission. A data compressor and a data expander in accordance with the present invention are realized by the construction of the combination of the coefficient table, a data shifter composed of a pluarlity of 4 to 1 data selectors, and an adder.

REFERENCES:
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patent: 4626829 (1986-12-01), Hauck
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patent: 4897653 (1990-01-01), Wakumura et al.
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Journal of the Institute of Television Engineers of Japan, vol. 37, No. 11, Nov. 1983, pp. 935-941, JP; Yoshino et al.: "Digital Sound Transmission System for Television Broadcasting via Satellite".

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