Speech coder and method having spectral interpolation and fast c

Details Speech coder and method having spectral interpolation and fast c Speech coder and method having spectral interpolation and fast c

1991-03-15

1993-03-16

Fleming, Michael R.

G10L 904

Patent

active

051951681

ABSTRACT:
A novel spectral interpolation and efficient excitation codebook search method developed for a Code-Excited Linear Predictive (CELP) speech coder is set forth. The interpolation is performed on an impulse response of the spectral synthesis filter. As the result of using this new set of interpolation parameters, the computations associated with an excitation codebook search in a CELP coder are considerably reduced. Furthermore, a coder utilizing this new interpolation approach provides noticeable improvement in speech quality coded at low bit-rates.

REFERENCES:
patent: 3631520 (1971-12-01), Atal
patent: 4133976 (1979-01-01), Atal et al.
patent: 4220819 (1980-09-01), Atal
patent: 4896361 (1990-01-01), Gerson
patent: 4905288 (1990-02-01), Gerson et al.
patent: 5007092 (1991-04-01), Galand et al.
An Expandable Error-Protected 4800 BPS CELP Coder (U.S. Federal Standard 4800 BPS Voice Coder) by Campbell et al., IEEE, CH2673-2/89/0000-0735, 1989, pp. 735-738.
Improved Speech Quality and Efficient Vector Quantization in Selp, by Krasinski et al., IEEE, CH2561-9-88-0000-0155, 1988, pp. 155-158.
Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 KBPS by Gerson et al., IEEE, CH2847, 2-90-0000-0461, 1990, pp. 461-464.
Spectral Quantization and Interpolation For CEKP Coders, by Atal et al., IEEE, CH2673-2/89/0000-0069, 1989, pp. 69-72.

Affiliated with

Also associated with

Rating

Speech coder and method having spectral interpolation and fast c 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 coder and method having spectral interpolation and fast c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech coder and method having spectral interpolation and fast c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-357064