Postfiltering audio signals especially speech signals

Details Postfiltering audio signals especially speech signals Postfiltering audio signals especially speech signals

1997-10-20

2000-05-02

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704502, G10L 914

Patent

active

060583606

ABSTRACT:
A short-delay postfilter (13) for postfiltering an encoded or decoded audio signal, specifically a speech signal, the short-delay postfilter having a transfer function F(z) of the form F(z)=D(z)/E(z), where E(z) and (D(z) are polynomials dependent on the variable z, where z is the inverse of the unit delay operator z.sup.-1 used in the z transform representation of transfer functions and wherein the denominator E(z) of the transfer functions H(z) of the audio signal's corresponding production filter (12) is also derived and the numerator D(z) differs from the denominator E(z) and is derived by using a longer period than used for the denominator E(z).

REFERENCES:
patent: 4301329 (1981-11-01), Taguchi
patent: 4381561 (1983-04-01), Treiber
patent: 4472832 (1984-09-01), Atal et al.
patent: 4475227 (1984-10-01), Belfield
patent: 4617676 (1986-10-01), Jayant et al.
patent: 4617677 (1986-10-01), Chiba
patent: 4720861 (1988-01-01), Bertrand
patent: 4726037 (1988-02-01), Jayant
patent: 4757517 (1988-07-01), Yatsuzuka
patent: 4817157 (1989-03-01), Gerson
patent: 4852169 (1989-07-01), Veeneman et al.
patent: 4969192 (1990-11-01), Chen et al.
patent: 5241650 (1993-08-01), Gerson et al.
patent: 5359696 (1994-10-01), Gerson et al.
patent: 5694519 (1997-12-01), Chen et al.
"Personal Digital Cellular Telecommunication System RCR Standard" RCR STD-27D, Fascicle 1, Research & Development Center for Radio Systems (RCR), Jun. 27, 1995, pp. 668-787.
"Cellular System Dual-Mode Mobile Station--Base Station Compatibility Standard", EIA/TAI Project No. 2215, IS-54, Electronics Industries Association, Dec. 1989, pp. 71-77.

Affiliated with

Also associated with

Rating

Postfiltering audio signals especially speech signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Postfiltering audio signals especially speech signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Postfiltering audio signals especially speech signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1601711