G - Physics – 10 – L
Patent
G - Physics
10
L
354/47, 354/50
G10L 9/14 (1985.01)
Patent
CA 1270331
DIGITAL SPEECH CODER WITH DIFFERENT EXCITATION TYPES Abstract An improved speech analysis and synthesis system where pitch information for excitation is transmitted during voiced segments of speech and modified residual information for excitation is transmitted during unvoiced speech segments along with linear predictive coded (LPC) parameters. The speech analysis portion of the system uses a pitch detection circuit to determine when the speech is voiced or unvoiced and to calculate the pitch information during voiced segments. A multi-pulse excitation forming circuit generates the modified residual signal which is obtained from the cross correlation of the residual signal and the LPC-recreated original signal. The pitch detection circuit controls a multiplexer which selects either the output of the multi-pulse excitation forming circuit or the output of the pitch detection circuit for transmission as the excitation information with LPC parameters to the synthesizer portion of the system.
514867
Hartwell Walter Thornley
Picone Joseph
Prezas Dimitrios Panos
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
Digital speech coder with different excitation types 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 with different excitation types, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital speech coder with different excitation types will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1324746