Patent
Fast frequency-domain pitch estimation
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TLDR
In this paper, a first transform of the signal to a frequency domain over a first time interval (42) and a second transform over a second time interval, which contains the first-time interval, is used to estimate the pitch frequency of an audio signal.Abstract:
A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval (42), and computing a second transform of the signal of the frequency domain over a second time interval (44), which contains the first time interval. A line spectrum of the signal is found, based on the first and second transforms, the spectrum including spectral lines having respective line amplitudes and line frequencies. A utility function (130) that is periodic in the frequencies of the lines in the spectrum is then computed. This function is indicative (158), for each candidate pitch frequency in a given pitch frequency range, of a compatibility of the spectrum with the candidate pitch frequency. The pitch frequency of the speech signal is estimated responsive to the utility function (176, 178).read more
Citations
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References
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Speech analysis/Synthesis based on a sinusoidal representation
R.J. McAulay,Thomas F. Quatieri +1 more
TL;DR: A sinusoidal model for the speech waveform is used to develop a new analysis/synthesis technique that is characterized by the amplitudes, frequencies, and phases of the component sine waves, which forms the basis for new approaches to the problems of speech transformations including time-scale and pitch-scale modification, and midrate speech coding.
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Period Histogram and Product Spectrum: New Methods for Fundamental‐Frequency Measurement
TL;DR: Several methods of fundamental frequency and period measurement, based on these concepts, are described and the results of computer simulations and analog instrumentations indicate that these new methods compare favorably with, and in some cases exceed, the capabilities of cepstrum analysis.
Journal ArticleDOI
Super resolution pitch determination of speech signals
TL;DR: Based on a new similarity model for the voice excitation process, a novel pitch determination procedure is derived that has infinite (super) resolution, better accuracy than the difference limen for F/sub 0/, robustness to noise, reliability, and modest computational complexity.
Patent
Linear predictive speech encoding systems with efficient combination pitch coefficients computation
TL;DR: In this paper, method and system aspects for linear predictive speech encoding are disclosed, which include the definition of an error function, the computation of an optimal vector of continuous pitch coefficients together with an optimal pitch, and the weighted vector quantization of the continuous pitch coefficient.