Adaptive delta codec which varies a delta signal in accordance w

Details Adaptive delta codec which varies a delta signal in accordance w Adaptive delta codec which varies a delta signal in accordance w

1981-12-30

1985-07-30

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

332 11D, 375 28, 340347M, H03K 1302

Patent

active

045324948

ABSTRACT:
A delta value generating circuit in an adaptive delta codec, comprising a delta value register, a control terminal for indicating increase or decrease of the delta value and adder/subtractor for increasing or decreasing the delta value in the register in accordance with a level at the control terminal. The adder/subtractor has first input terminals connected to the output terminals of the register and second input terminals connected to a predetermined number of upper bits of the output terminals of the register and the control terminal in accordance with a level at the control terminal.

REFERENCES:
patent: 3296612 (1967-01-01), Tomozawa
patent: 3631520 (1971-12-01), Atal
patent: 3971987 (1976-07-01), Carrubba et al.
patent: 4107610 (1978-08-01), Weber
Conference Record, 1978 International Conference on Communications, vol. 1, 1978, pp. 8.3.1-8.3.5.

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