Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1974-09-30
1976-01-06
Brody, Alfred L.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
178 66R, 325 38B, H03K 1322
Patent
active
039315967
ABSTRACT:
Ideally, when a signal is quantized, the range of the quantizer should be matched to the power of the signal. Disclosed herein is adaptive quantizer apparatus which utilizes a particular quantizing scheme for those communications where the power of the signal to be quantized is unknown, but remains constant for the duration of a communication. The amplitude range of an adaptive quantizer is adjusted during an initial training period to a value appropriate to the power of the applied input signal. This is accomplished by successively altering the amplitude range by a multiplicative quantity that depends upon the amplitude of the quantizer output signal and upon the time elapsed since the onset of the training period.
REFERENCES:
patent: 3699566 (1972-10-01), Schindler
patent: 3806806 (1974-04-01), Brolin
patent: 3815033 (1974-06-01), Tewksbury
patent: 3857111 (1974-12-01), Deschenes et al.
Johnson et al., 37 Adaptive Rate Delta Modulator"--IBM Tech. Disclosure Bulletin, Vol. 15, No. 11, pp. 3338-3341, Apr., 1973.
Jones et al., "Adaptive Delta Modulator with Variable--Sample Rate", IBM Tech. Disclosure Bulletin, Vol. 15, No. 10, pp. 3168-3169, Mar., 1973.
Henry, "Logarithmic Digital Compandor for Delta Modulator"--IBM Tech. Disclosure Bulletin--Vol. 17, No. 3, pp. 909-910, Aug., 1974.
Gersho Allen
Goodman David Joel
Bell Telephone Laboratories Incorporated
Brody Alfred L.
Murphy G. E.
Ryan W.
LandOfFree
Adaptive quantizer apparatus using training mode does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive quantizer apparatus using training mode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive quantizer apparatus using training mode will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2352540