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On a delta modulation based real time autocorrelator

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2 Author(s)
Jing Yuan ; South China Institute of Technology, Guang Zhou, P.R.China ; Jing Ou-Yang

Theoretical analysis indicates that the quantization error of a linear delta modulator (LDM) output can be divided into an equivalent PCM quantization error and a high frequency noise irrelevant to the input. Under certain treatment the autocorrelation of a DM output can approximate that of the input signal's derivative. Simulation and experimental results prove that a delta modulation based autocorrelator (DMAC) is an efficient aid to extracting speech features.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '85.  (Volume:10 )

Date of Conference:

Apr 1985