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Delta Modulators in Packet Voice Networks

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3 Author(s)
V. Dhadesugoor ; Network Analysis Corp., Vienna, VA ; C. Ziegler ; D. Schilling

In this paper, the performances of the Song Voice Adaptive Delta Modulator (SVADM) and the Continuously Variable Slope Delta Modulator (CVSD) in terms of dynamic range, sampling rate and the channel errors are compared. The use of the SVADM and the CVSD in a packet voice system, the algorithms for digital detection of silent periods and the performance of a packet voice system using the SVADM and the CVSD as source encoders are presented. The parameters employed for subjective evaluation of the packet voice system are packet size, silence detection algorithm, bit rate and packet loss rate.

Published in:

IEEE Transactions on Communications  (Volume:28 ,  Issue: 1 )