Spectral synthesis techniques often use the OverLap-Add method. But in the case of noise synthesis, both experiments and theory show that this method introduces intensity fluctuations which imply audible artifacts. We propose here new methods to avoid these variations. The first one consists in multiplying the resulting signal by another weighting window to compensate dynamic fluctuations. The ...

In this paper, an algorithm for the concatenation of speech signal segments taken from disjoint utterances is presented. The algorithm is based on the Analysis-bySynthesis/Overlap-Add (ABS/OLA) sinusoidal model [1, 2, 3], which is capable of performing high quality pitchand time-scale modi cation of both speech and music signals. With the incorporation of concatenation and smoothing techniques,...

In order to transform the perceived speaker identity, a voice conversion system should, a.o., convert the speaker’s prosodic characteristics. When considering pitch contours, most systems only transform the pitch by simple scaling. A stochastic system that transforms pitch contours taking into account multiple pitch parameters has been developed and is described. A pitch transplantation system ...

In this paper we present a novel two-microphone sound source separation algorithm, which selects the signal from the target direction while suppressing signals from other directions. In this algorithm, which is referred to as Power Angle Information Near Target (PAINT), we first calculate phase difference for each time-frequency bin. From the phase difference, the angle of a sound source is est...

This paper describes a method for text-to-speech waveform synthesis based on the Analysis-by-Synthesis/Overlap-Add (ABS/OLA) sinusoidal model. This model has been shown in previous work to be a useful framework for pitch and time-scale modi cation of both speech and music signals. This paper explores some extensions of the original ABS/OLA formulation that attempt to overcome speci c artifacts,...

For the Helmholtz equation, simple absorbing conditions of the form ∂n − iω were proposed as transmission condition (TC) in Schwarz methods first without overlap in [4], and later also with overlap, see [3, 12]. More advanced TCs can also be used, see e.g. [11, 14, 2]. Furthermore, parameters can be introduced into TCs and then optimized for rapid convergence, which led to the so called optimiz...