Low bit rate speech signal transmitting system using an analyzer

Details Low bit rate speech signal transmitting system using an analyzer Low bit rate speech signal transmitting system using an analyzer

1992-12-03

1996-09-17

MacDonald, Allen R.

395 229, 395 225, G10L 302

Patent

active

055577059

ABSTRACT:
In a speech signal encoding system comprising an analyzer and a synthesizer, the analyzer is supplied with an input analog signal to preliminarily select a sequence of digital signals within an analysis frame, to extract a sequence of excitation pulses, from the analysis frame which is divided into a plurality of time intervals each of which is subdivided into a plurality of phases, correlations are calculated between autocorrelations of impulse responses within the analysis frame and cross correlations between the digital signals and the impulse responses to detect, by a maximum similarity series searching circuit, the sequence of the excitation pulses which has a maximum similarity between the autocorrelation coefficients and the cross correlations. The excitation pulses appear at an equidistant time interval and an identical amplitude and have a selected one of the phases and variable polarities. The excitation pulses are sent to the synthesizer together with a phase signal representative of the selected phase, an amplitude signal determined by the analyzer, and a sequence of LPC parameters calculated in relation to the analysis frame.

REFERENCES:
patent: 4720865 (1988-01-01), Taguchi
patent: 4937868 (1990-06-01), Taguchi
patent: 4975955 (1990-12-01), Taguchi
patent: 5001759 (1991-03-01), Fukui
patent: 5228086 (1993-07-01), Morii
patent: 5305421 (1994-04-01), Li
Hamming, R. W.--Digital Filtering, 1983, pp. 100-105, sec 5.7.
Parsons, Thomas; Voice and Speech Processing, 1986, pp. 64-65, 197-198.
E. F. Depretter et al, "Regular Excitation Reduction For Effective and Efficient LP-Coding of Speech", ICASSP, 1985, pp. 965-968.

Affiliated with

Also associated with

Rating

Low bit rate speech signal transmitting system using an analyzer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low bit rate speech signal transmitting system using an analyzer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low bit rate speech signal transmitting system using an analyzer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-420425