 | Glottal Event Synchronous Sinusoidal Model based on Frequency-to-Instantaneous Frequency Mapping
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| | | | In this paper we describe a glottal event synchronous sinusoidal model based speech analysis and synthesis system. The sinusoidal components are event synchronously estimated using a mapping from linearly spaced filter centre frequencies to the instantaneous frequencies of the filter outputs. Stable frequency domain fixed points of this mapping correspond to the constituent sinusoidal component of the input signal. A robust fundamental frequency extraction technique based on a wavelet representation of this fixed points model is also used. Event detection and characterisation is based on group delay and similar fixed point analysis. This method enables the detection of precise timing and spread of speech events such as vocal fold closure. These form the essential parts of the sinusoidal analysis system that also includes a sinusoidal component trajectory continuation scheme. This model is capable of high quality speech synthesis using the overlap-add synthesis method and is also applicable to other sound sources. |
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