Digital voice transmission having improved echo suppression

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

1791702, H04B 320

Patent

active

046097880

ABSTRACT:
A digital communication apparatus with improved echo suppression includes a circuit for detecting the gain of a far talker signal and a circuit for detecting the gain of a near talker signal. These gains are compared and echo suppression is accomplished by suppressing the lesser of the two gains.

REFERENCES:
patent: 3821494 (1974-06-01), Besseyre
patent: 4002854 (1977-01-01), Penrose
patent: 4005276 (1977-01-01), Abramson et al.
patent: 4016557 (1977-04-01), Zitelli et al.
patent: 4028506 (1977-06-01), Areski et al.
patent: 4031338 (1977-06-01), Campanella et al.
patent: 4051332 (1977-09-01), Izumi et al.
patent: 4074086 (1978-02-01), Falconer et al.
patent: 4131767 (1978-12-01), Weinstein
patent: 4165449 (1979-08-01), Vachon
patent: 4213097 (1980-07-01), Chiu et al.
patent: 4230906 (1980-10-01), Davis
patent: 4368360 (1983-01-01), Sato et al.
patent: 4490582 (1984-12-01), Munson
"Speech Analysis Synthesis and Perception", J. C. Flanagan, Spring-Verloz, 1972, pp. 162 and 163.
"Implementation of a Two-Channel LPC Vocoder", Young Cheol Shin, IEEE, pp. 907-916.
"Linear Prediction: A Tutorial Review", John Makhoul, IEEE, pp. 124-143.
"The Government Standard Linear Predictive Coding Algorithm: LPC-10", Thomas E. Tremain, pp. 40-49.
"An Efficient Linear-Prediction Vocoder", M. R. Sambur, The Bell System Technical Journal, Dec. 1975, pp. 1693-1723.
"Digital Processing of Speech Signals", Prentice-Hall, Inc., Rabiner and Schafer, Article--Linear Predictive Coding of Speech, pp. 396-455.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Digital voice transmission having improved echo suppression 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 voice transmission having improved echo suppression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital voice transmission having improved echo suppression will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1098845

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.