Digital data companding

Details Digital data companding Digital data companding

1982-04-15

1987-07-21

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

364722, H03M 750

Patent

active

046821520

ABSTRACT:
Digital companding without range bits involves comparison of a digital input with predetermined boundaries separating a plurality of numerical ranges, detection of a numerical range to which the digital input belongs, generation of an off-set unique to each numerical range, bit-shifting of the digital input, and addition of the bit-shifted input with the generated off-set to provide a companded digital output which is in one-to-one correspondence to the digital input. The off-set values are stored in a memory.

REFERENCES:
patent: 3610901 (1971-10-01), Lynch
patent: 3863248 (1975-01-01), Deschemes
patent: 4058676 (1977-11-01), Wilkes
patent: 4062014 (1977-12-01), Rothgordt
patent: 4078250 (1978-03-01), Windsor
patent: 4267579 (1981-05-01), Gross
patent: 4326260 (1982-04-01), Gross
patent: 4342245 (1982-08-01), Gross
"CCIR Study group report 647", 1974-1977, pp. 1-4.
Dubmowski, "IEEE Transactions on Communications", vol. COM26, No. 5, May 1978, pp. 660-664.

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