Accession Number:

AD0296598

Title:

REMOVING THE NOISE FROM THE QUANTIZATION PROCESS BY DITHERING: LINEARIZATION

Descriptive Note:

Corporate Author:

RAND CORP SANTA MONICA CA

Personal Author(s):

Report Date:

1963-02-01

Pagination or Media Count:

46.0

Abstract:

The linearization of the highly important multistep quantizer nonlinearity by the application of independent quantizer activators called dithers is treated. For the dithered quantizer acting as it often does in conjunction with a low-pass or band-pass filter, numerical answers are given for the first time to the following questions 1 What is the equivalent quantizer gain 2 What upper bounds does the dither place upon the maximum deviation from linearity 3 How does one determine, for given specifications, a dither amplitude so that the system is optimally dithered Such information, with regard to two time-periodic dithers the sinusoid and sawtooth makes it possible to effect analog-to-digital-to-analog conversion to name one application with no apparent loss of information even when the quantization is rough. The properties of the sinusoidal and sawtooth waves as quantizer linearizers are developed in detail it is shown that the sawtooth is superior to the more popular sinusoid in most important respects.

Subject Categories:

  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE