Research on Adaptive Delta Modulators
V. R. Dhadesugoor, C. Ziegler, Donald L. Schilling · 1978
Abstract : In this report, the performance of the Song Mode Voice Adaptive Delta Modulator (SVADM) and the Continuously Variable Slope Delta MODULATOR (CVSD) are compared in terms of dynamic range, sampling rate and the channel errors. The use of the SVADM and the CVSD in a packet voice channel, the algorithms for digital detection of periods of silence and the performance of a packet voice channel using the SVADM and the CVSD as source encoders are presented. The parameters employed for subjective evaluation of the packet voice channel are packet size, silence detection algorithm, bit rate and packet loss rate.