Title :
A Discretely Adaptive Delta Modulation Codec
Author :
Niwa, Kunihiko ; Yukawa, Akira ; Tomozawa, Atsushi
Author_Institution :
Central Res. Labs., Kawasaki, Japan
fDate :
2/1/1981 12:00:00 AM
Abstract :
A discretely variable slope delta modulation (DVSD) codec is described, which is suitable for integrated circuit realization. The step size is varied by a pulse number modulation method that does not require a precision digital-to-analog conversion circuit. An adaptation algorithm is discussed, taking into consideration the effect of transmission errors. The quantizer and integrator portion has been fabricated on a monolithic chip using MOS technology. Results obtained from an experimental 32 kbit/s codec demonstrate its excellent performance.
Keywords :
Delta modulation, coding/decoding; MOS integrated circuits, analog; Circuits; Codecs; Delta modulation; Digital modulation; Filters; Frequency; Pulse modulation; Pulse shaping methods; Sampling methods; Wave functions;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1981.1094979
