Computationally efficient sine wave synthesis for acoustic wavef

Details Computationally efficient sine wave synthesis for acoustic wavef Computationally efficient sine wave synthesis for acoustic wavef

1988-04-08

1990-06-26

Harkcom, Gary V.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

381 37, G10L 500

Patent

active

049378732

ABSTRACT:
Methods and apparatus for reducing discontinuities between frames of sinusoidally modeled acoustic waveforms, such as speech, which occur when sampling at low frame rates. A Fast Fourier Transform-based overlap-add technique is applied to amplitude, frequency and phase components of sinusoidal waves after frame-to-frame sine wave matching has been performed. Matched sine wave amplitudes and frequencies are linearly interpolated and mid-point phase is estimated such that the mid-frame sine wave is best fit to the most recent half-frame segments of the lagging and leading sine waves. Synthetic mid-frame sine waves are generated using the interpolated amplitude and frequency and estimated phase values. Synthesized acoustic waveforms of high quality from original source waveforms can be produced in sinusoidal analysis/synthesis operations at coding frame rates of 50 Hz and lower. The methods and devices disclosed herein are particularly useful for computationally efficient coding and synthesis of speech waveforms.

REFERENCES:
patent: 3296374 (1963-06-01), Clapper
patent: 3360610 (1967-12-01), Flanagan
patent: 3484556 (1964-12-01), Flanagan et al.
patent: 3978287 (1976-08-01), Fletcher et al.
patent: 3982070 (1976-09-01), Flanagan
patent: 4034160 (1977-07-01), Van Gerwen
patent: 4058676 (1977-11-01), Wilkes et al.
patent: 4076958 (1978-02-01), Fulghum
patent: 4701953 (1987-10-01), White
patent: 4701955 (1987-10-01), Taguchi
patent: 4752956 (1988-06-01), Sluijter
Almeida et al., "Variable-Frequency Synthesis: An Improved Coding Scheme", IEEE ICASSP, Mar. 1984, pp. 1-4.
Crochiere, "A Weighted Overlap-Add Method of Short-Time Fourier Analysis/Synthesis", IEEE Trans. on ASSP, vol. ASSP-28, No. 1, Feb. 1980, pp. 99-102.
Hedelin, "A Tone-Oriented Voice-Excited Vocoder", Chalmers Univ. of Technology, CH1610-5, IEEE, 1981, pp. 205-208.
"A Tone-Oriented Voice-Excited Vocoder" Hedelin; Chalmers University of Technology, Gothenburg, Sweden, CH1610/5/81, pp. 205-208.
"A Representation of Speech With Partials", Hedelin; 1982, Elmevier Biological Press, The Representation of Speech in the Paripheral Auditory System, R. Carlson & B. Granstrom, pp. 247-250.
Malpass, "The Gold-Rabiner Pitch Detector In A Real Time Environment", Proc. of EASCON 1975 (Sep. 1975), pp. 1-7.
Gold, "Description of a Computer Program for Pitch Detection", Fourth International Congress, Copenhagen, Aug. 21-28, 1962.
Gold, "Note on Buzz-Hiss Detection", J. Acoust. Soc. Am., vol. 36, No. 9, pp. 1659-1661, 1964.
Silverman et al., "Transfer Characteristic Estimation for Speech Via Multirate Evaluation", IEEE Publication 75 CHO 998-5 EASCON, 181-A to 181-F, Sep. 1975.
Holmes, "The JSRU Channel Vocoder", IEE Proc., vol. 127, No. 1 (Feb. 1960).
Rabiner et al., "Digital Processing of Signals", pp. 225-238 (1978).
Markel, Excerpt from Linear Prediction of Speech, pp. 227-262 (1967).
Crochiere, "A Weighted Overlap-Add Method . . . ", IEEE 1980, pp. 99-102.
McAulay et al., "Mid-Rate Coding Based on a Sinusoidal Representation of Speech", ICASSP'85, Tampa, Fla., Mar. 26-29, 1985.
Quatieri et al., "Low-Peak-Factor Speech Waveforms by Pulse Compression Design", IEEE ASSP, p. 29, May 15 & 16, 1987.
Quatieri et al., "Speech Transformations Based on a Sinusoidal Representation", IEEE Trans. on Acoustics, vol. ASSP-34, No. 6 (Dec. 1986).
Quatieri et al., "Mixed-Phase Deconvolution of Speech Based on a Sine-Wave Model", Presented at ICASSP, Dallas, Tex. (Apr. 6-9, 1987).
McAulay et al., "STC: A Multirate Coder Operating at 2.4-8.0 KBPS", Presented at Speech Tech 87, New York City, N.Y., Apr. 1987.
McAulay et al., "Multirate Sinusoidal Transform Coding at Rates from 2.4 KBPS to 8 KBPS", Presented at ICASSP 87, Dallas, Tex. (Apr. 6-9, 1987).
McAulay et al., "Speech Analysis/Synthesis Based on a Sinusoidal Representation", IEEE 1986, pp. 744-754 (Aug. 1986).
McAulay et al., "Phase Modelling and its Application to Sinusoidal Transform Coding", Presented at ICASSP'86, Tokyo, Japan (Apr. 8-11, 1986).
Quatieri et al., "Speech Transformations Based on a Sinusoidal Representation", ICASSP-IEEE Int'l. Conf. (Mar. 2614 29, 1985).
Quatieri et al., "Speech Enhancement for AM Radio Broadcasting", Military Speech Tech'87 (Nov. 17-19, 1987).
Almeida et al., "Variable-Frequency Synthesis: An Improved Har
The U.S. Government has rights in this invention pursuant to the Department of the Air Force Contract No. F19-028-85-C-0002.

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