Title :
Digital multiplex telephone transmission system using statistical properties of speech
Author :
Flood, J.E. ; Whitehouse, K.G.
Author_Institution :
University of Aston in Birmingham, Department of Electrical Engineering, Birmingham, UK
Abstract :
A digital multiplex telephone transmission system is proposed, which should achieve a smaller bandwidth than conventional pulse-code modulation by using the statistical properties of speech waveforms. Each frame of transmitted pulses only contains a coded sample for a channel if the sample differs from the previous one from that channel. The frame can thus contain fewer time slots than there are channels, if there is a high probability of baseband signals changing by less than one quantising level during the frame period.
Keywords :
digital circuits; multiplexing; speech; statistics; telephone networks; bandwidth; baseband signals; digital circuits; digital multiplex telephone transmission system; multiplexing; pulse code modulation; quantising level; speech waveforms; telephone networks; time slots;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19720069
