Pitch Detection Using the Short—term Phase Spectrum
نویسنده
چکیده
A new frequency domain method for determining the fundamental frequency of speech is presented in this paper. This method uses the information contained in the short—term phase spectrum whereas the previous methods were limited to the amplitude spectrum. The short—term spectrum is computed by DFT and it is interpreted as the output of a bank of band—pass overlapping filters. Harmonic components are detected by searching for sets of three contiguous filters having the same instantaneous frequency. The frequency of a detected harmonic is given by the instantaneous frequency itself. A conventional harmonic numbering algorithm is used to convert the set of detected harmonics to a value of the fundamental frequency. Preliminary results show the validity of the method.
منابع مشابه
Melody Extraction from Polyphonic Audio of Western Opera: A Method based on Detection of the Singer's Formant
Current melody extraction approaches perform poorly on the genre of opera [1, 2]. The singer’s formant is defined as a prominent spectral-envelope peak around 3 kHz found in the singing of professional Western opera singers [3]. In this paper we introduce a novel melody extraction algorithm based on this feature for opera signals. At the front end, it automatically detects the singer’s formant ...
متن کاملSpeech analysis using instantaneous frequency deviation
In this paper, our aim is to derive a phase spectrum representation computed via the short-time Fourier transform. Specifically, we are interested in developing a narrow-band speech representation – employing 20-40 ms analysis windows. Furthermore, this representation should be as physically meaningful as the magnitude spectrum. To achieve these ends, we concentrate on instantaneous frequency (...
متن کاملModified Group Delay Based MultiPitch Estimation in Co-Channel Speech
Phase processing has been replaced by group delay processing for the extraction of source and system parameters from speech. Group delay functions are ill-behaved when the transfer function has zeros that are close to unit circle in the z-domain. The modified group delay function addresses this problem and has been successfully used for formant and monopitch estimation. In this paper, modified ...
متن کاملLow-Complexity Pitch Estimation Based on Phase Differences Between Low-Resolution Spectra
Detection of voiced speech and estimation of the pitch frequency are important tasks for many speech processing algorithms. Pitch information can be used, e.g., to reconstruct voiced speech corrupted by noise. In automotive environments, driving noise especially affects voiced speech portions in the lower frequencies. Pitch estimation is therefore important, e.g., for in-car-communication syste...
متن کاملFault Detection Method on a Compressor Rotor Using the Phase Variation of the Vibration Signal
The aim of this work is the application of the phase variation in vibration signal for fault detection on rotating machines. The vibration signal from the machine is modulated in amplitude and phase around a carrier frequency. The modulating signal in phase is determined after the Hilbert transform and is used, with the Fast Fourier Transform, to extract the harmonics spectrum in phase. This me...
متن کامل