Speech coding using time code modulation

A continuation of previous research which proposed a uniform amplitude coder as an alternative to traditional time-domain coders is presented. The time code modulation (TCM) encoder transmits the quantized intervals, corresponding to the time at which the input signal passed through uniform spaced a...

Full description

Saved in:
Bibliographic Details
Published inIEEE Proceedings of the SOUTHEASTCON '91 pp. 861 - 863 vol.2
Main Authors Foster, J., Wang, T.-K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1991
Subjects
Decoding
Frequency
Interpolation
Low pass filters
Modulation coding
Packet switching
Phase change materials
Sampling methods
Signal sampling
Speech coding
Online AccessGet full text

Cover

More Information
Summary:A continuation of previous research which proposed a uniform amplitude coder as an alternative to traditional time-domain coders is presented. The time code modulation (TCM) encoder transmits the quantized intervals, corresponding to the time at which the input signal passed through uniform spaced amplitude levels (of a predetermined step size). The decoder reconstructs the signal by using liner interpolation in the amplitude domain. The sampling frequency and the step size are shown to be the two dominant factors that affect TCM performance; the higher the sampling frequency and the smaller the step size, the higher the SNR that can be achieved by TCM; at the same time, however, the transmission rate will increase. TCM was simulated at different sampling frequencies and step sizes with various sources.< >
ISBN:9780780300330
0780300335
DOI:10.1109/SECON.1991.147882