Title :
ADPCM using vector predictor and forward adaptive quantiser with step-size prediction
Author :
Wong, K.H.J. ; Steele, R.
Author_Institution :
University of Southampton, Department of Electronics & Information Engineering, Southampton, UK
Abstract :
An adaptive differential pulse code modulation (ADPCM) system is described having a set of fixed vector predictors, and a quantiser that is adapted in the forward direction with the distinction that its step size is predicted from previous values. SNR gains compared to DPCM-AQF are presented for bit rates of 16, 24 and 32 kbit/s.
Keywords :
analogue-digital conversion; encoding; pulse-code modulation; SNR gains; adaptive differential pulse code modulation; encoding; fixed vector predictors; forward adaptive quantiser; step-size prediction;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850051
