Title :
Amplitude-controlled two-loop adaptive delta modulator
Author :
Chakravarthy, C.V. ; Faruqui, M.N.
Author_Institution :
Indian Institute of Technology, Department of Electronics & Electrical Communication Engineering, Kharagpur, India
fDate :
4/1/1979 12:00:00 AM
Abstract :
In this paper an adaptive delta modulator (a.d.m.) is proposed which derives its companding information from the number of transitions from 0 to 1 and 1 to 0 that occur in the digital output. The companding characteristics and the s.n.r. have been analysed. The details of an experimental coder built in the laboratory are given along with the performance. At 32 kbit/s, the s.n.r. for a 800 Hz signal is >26 dB for an input variation of 30 dB. It compares well with other similar a.d.m. coders.
Keywords :
amplitude modulation; code convertors; delta modulation; modulators; adaptive delta modulator; amplitude controlled; coder; companding characteristics; digital output; signal to noise ratio; two loop;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1979.0075
