Multipulse processing with freedom given to multipulse positions

Details Multipulse processing with freedom given to multipulse positions Multipulse processing with freedom given to multipulse positions

1994-12-06

1997-12-09

MacDonald, Allen R.

G10L 902

Patent

active

056968744

ABSTRACT:
In a multipulse processing device for achieving a high encoding efficiency without using a high sampling frequency for an input signal and with a great degree of freedom given to positions of multipulses, an input speech signal is subjected by an LPC analyzer/processor 3 to LPC analysis of each analysis frame for extraction of LPC coefficients after sampled by an A/D converter 2. Multipulses are retrieved as a result of decision by a multipulse analyzer 20 with a degree of freedom given relative to sampling points of a sampled speech signal supplied through an auditorily weighting filter 4. Encoded by an encoder 41 and together with k parameters used as an example of the LPC coefficients, retrieved multipulses are multiplexed by a multiplexer 42 for delivery to a synthesis side. A multipulse waveform synthesizer 45 synthesizes a waveform by using decoded multipulse data and the LPC coefficients.

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"Speech Coding Based on Multi-pulse Excitation Method:, Institute of Electronics & Communication Engineers of Japan", CAS82-202, Mar. 1983, pp. 115-122.

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