Pitch epoch synchronous linear predictive coding vocoder and met

Details Pitch epoch synchronous linear predictive coding vocoder and met Pitch epoch synchronous linear predictive coding vocoder and met

1995-07-17

1996-11-26

MacDonald, Allen R.

395 228, 395 277, 395 275, G10L 502, G10L 900

Patent

active

055794378

ABSTRACT:
A method for pitch epoch synchronous encoding of speech signals. The method includes steps of providing an input speech signal, processing the input speech signal to characterize qualities including linear predictive coding coefficients and voicing, and characterizing excitation corresponding to the input speech signals using frequency domain techniques when input speech signals comprise voiced speech to provide an excitation function. The method also includes steps of characterizing the input speech signals using time domain techniques when the input speech signals comprise unvoiced speech to provide an excitation function and encoding the excitation function to provide a digital output signal representing the input speech signal.

REFERENCES:
patent: 4439839 (1984-03-01), Kneib et al.
patent: 4710959 (1987-12-01), Feldman et al.
patent: 4742550 (1988-05-01), Fette
patent: 4815134 (1989-03-01), Picone et al.
patent: 4899385 (1990-02-01), Ketchum et al.
patent: 4963034 (1990-10-01), Cuperman et al.
patent: 4969192 (1990-11-01), Chen et al.
patent: 5027404 (1991-06-01), Taguchi
patent: 5127053 (1992-06-01), Koch
patent: 5138661 (1992-08-01), Zinser et al.
patent: 5265190 (1993-11-01), Yip et al.
patent: 5293449 (1994-03-01), Tzeng
patent: 5341456 (1994-08-01), DeJaco
patent: 5371853 (1994-12-01), Kao et al.
patent: 5485543 (1996-01-01), Aso
An article entitled "Excitation-Synchronous Modeling of Voiced Speech" by S. Parthasathy and Donald W. Tufts. from IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-15, No. 9., (Sep. 1987).
An article entitled "Pitch Prediction Filters In Speech Coding", by R. P. Ramachandran and P. Kabal, in IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 37, No. 4. (Apr., 1989).
An article entitled "High-Quality Speech Coding at 2.4 to 4.0 KBPS Based On Time-Frequency Interpolation" by Yair Shoham, Speech Coding Research Dept., A T & T Bell Laboratories, 1993 IEEE, (1993).
An article entitled "Implementation and Evaluation of a 2400 BPS Mixed Excitation LPC Vocoder" by Alan V. McCree and Thomas P. Barnwell III, School of Electrical Engineering, Georgia Institute of Technology, (1993).
Granzow et al., "High quality digital speech at 4KB/S", 1990, pp. 941-945, Globecom '90-IEEE Global Tlelecommunications Conference Dec. 1990.
Marques et al., "Improved Pitch Prediction with Fractional Delay in Celp Coding", 1990, pp. 665-668, ICASSP '90- 1990 International Conference on Acoustics, Speech, and signal processing. Apr. 1990.
Nathan et al., "A Time varying analysis method for rapid transitions in speech", 1991, pp. 815-824, IEEE Transactions on Signal processing. Apr. 1991.
Wood et al., "Excitation Synchronous Formant Analysis", 1989, pp. 110-118, IEE Proceedings I [Communications, Speech and Vision] Apr. 1988.
Laroche et al., "HNS: Speech modification based on a harmonics model", ICASSP-93. 1993 IEEE International Conference on Acoustics, Speech, and Signal Processing. pp. 550-553 Apr. 1993.
Yeldener et al., "Low bit rate speech coding at 1.2 and 2.4 kb/s", IEE colloquium on speech coding-techniques and applications, pp. 611-614. Apr. 1992.

Affiliated with

Also associated with

Rating

Pitch epoch synchronous linear predictive coding vocoder and met does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pitch epoch synchronous linear predictive coding vocoder and met, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pitch epoch synchronous linear predictive coding vocoder and met will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1979926