Adaptive parameters discrete values designing for delta a/d converters with non-uniform sampling

摘要

The suggestion of the method of designing the number and values of the adapted parameters for the delta coders including adapting both the quantization step size and sampling frequency is the subject of this paper. The necessary values of the sampling interval and the step size is limited and can be calculated before the converting procedure starts. All of the data of the step sizes or/and time intervals are collected in Look up Tables. Adaptation of two parameters (ANS-DM modulation) makes the system solution of the coder delta and its algorithm of adaptation more complicated but decreases considerably the required number of values of every adapted parameter thus improving the quality of conversion (SNR) in relation to the solutions with one parameter adaptation.