Speech processing system quantizer of single-gain pulse excitati

Details Speech processing system quantizer of single-gain pulse excitati Speech processing system quantizer of single-gain pulse excitati

1996-10-18

1998-12-29

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704216, G10L 500

Patent

active

058549986

ABSTRACT:
An improved speech processing system has a short-term analyzer, a target vector generator and a maximum likelihood, multi-pulse analyzer. The multi-pulse analyzer generates a plurality of sequences of equal amplitude, variable sign, variably spaced pulses. Each of the sequences have a different amplitude value and each of the pulses within each sequence have equal amplitudes but variable signs. The multi-pulse analyzer generates a signal corresponding to the sequence of equal amplitude, variable sign, variably spaced pulses which, according to maximum likelihood criteria, most closely represents the target vector. The maximum likelihood criteria are based on the cross-correlation of the target vector with an impulse response for the pulses in each sequence and on either a covariance matrix or an autocorrelation vector of the impulse response. In an alternative embodiment, the multi-pulse analyzer generates a plurality of sequences of variable sign trains of equal amplitude, uniformly spaced pulses and performs the analysis on the pulse trains. The pulses within each train have the same sign and each of the sequences of trains of pulses having a different amplitude value.

REFERENCES:
patent: 4710959 (1987-12-01), Feldman et al.
patent: 4932061 (1990-06-01), Kroon et al.
patent: 5007094 (1991-04-01), Hsueh et al.
patent: 5060269 (1991-10-01), Zinser
patent: 5557705 (1996-09-01), Taguchi

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