Speech transmission system

Details Speech transmission system Speech transmission system

1978-06-14

1979-10-09

Cooper, William C.

H04B 166

Patent

active

041707192

ABSTRACT:
A speech transmission system is improved in intelligibility and naturalness by separating voiced from invoiced speech segments prior to application to a transmission channel of restricted bandwidth. Voiced segments are combined without processing with discrete-frequency coded unvoiced segments processed in analog or digital fashion conformably with the limited channel bandwidth at the transmitter. Voiced segments are reproduced conventionally while unvoiced segments are simulated by noise sources triggered by decoded discrete frequencies at the receiver. The reconstructed speech signal can thus occupy substantially more than the limited channel bandwidth.

REFERENCES:
patent: 3040450 (1962-04-01), Schroeder
patent: 3158693 (1964-11-01), Flanagan
patent: 3542955 (1970-11-01), Flanagan
patent: 3875341 (1975-04-01), Gassmann
"A Vocoder for Transmitting 10 K0/5 Speech Over a 3.5 K0/5 Channel," M. R. Schroeder et al., Monograph 3698, Bell Telephone System Technical Publications, Oct. 1960.

Affiliated with

Also associated with

Rating

Speech transmission system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speech transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech transmission system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1966183