Digital speech coder having improved long term lag parameter det

Details Digital speech coder having improved long term lag parameter det Digital speech coder having improved long term lag parameter det

1989-08-31

1992-03-17

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 302

Patent

active

050975080

ABSTRACT:
A method and apparatus is provided for determining the lag of a long term filter in a code excited linear prediction speech coder. An open loop lag is first determined using an autocorrelation function. The open loop lag is then utilized to generate a limited range over which a closed loop search is performed. The range for appropriate values includes lags that are harmonically related to the open loop lag as well as adjacent lags.

REFERENCES:
patent: 4797925 (1989-01-01), Lin
patent: 4811396 (1989-03-01), Yatsuzuka
patent: 4817157 (1989-03-01), Gerson
patent: 4868867 (1989-09-01), Davidson et al.
patent: 4924508 (1990-05-01), Crepy et al.
patent: 4933957 (1990-06-01), Bottau et al.
patent: 4965789 (1990-10-01), Bottau et al.
Article entitled "Real-Time Vector APC Speech Coding at 4800 BPS with Adaptive Postfiltering" by Juin-Hwey Chen and Allen Gersho--1987 IEEE, pp. 51.3.1-51.3.4.

Affiliated with

Also associated with

Rating

Digital speech coder having improved long term lag parameter det does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital speech coder having improved long term lag parameter det, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital speech coder having improved long term lag parameter det will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1481819