Adaptive quantizer apparatus using training mode
US3931596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1974 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Sep 30, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/042
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.