One of the drawbacks to the speech synthesis technique wherein speech parameters are directly generated from hidden Markov models (HMM-based speech synthesis) is the unnaturalness of the synthesized speech. This problem occurs owing to the rough excitation model employed during the waveform generation stage. This report introduces a new excitation approach that attempt to solve this problem. Th...

Speech is the most adaptive communication adaptive by human as well as computer for interaction. The speech can be captured online or from distance input source devices. But these devices have the limitation to include some kind of impurities in the signal. One such problem commonly found in such speech signal is Acoustic feedback problem. It is considered as the sharp background instrumentatio...

This thesis addresses the problem of quality degradation in speech produced by parameter-based speech synthesis, within the framework of an articulatory-acoustic forward mapping. I first investigate current problems in speech parameterisation, and point out the fact that conventional parameterisation inaccurately extracts the vocal tract response due to interference from the harmonic structure ...

The speech enhancement problem comprises of various problems characterized by the type of noise source, the nature of interaction between speech and noise, the number of sensor signals (microphone outputs) available for enhancement and the nature of the speech application. Noise reduction remains a demanding problem due to wide variety of background noise types (car noise, babble noise, cockpit...

The problem of creating mouth animation synchronized to recorded speech is discussed. Review of a model of speech sound generation indicates that the automatic derivation of mouth movement from a speech soundtrack is a tractable problem. Several automatic lip-sync techniques are compared, and one method is described in detail. In this method a common speech synthesis method, linear prediction, ...

PURPOSE The aim of this study was to relate speakers' auditory acuity for the sibilant contrast, their use of motor equivalent trading relationships in producing the sibilant /∫/, and their produced acoustic distance between the sibilants /s/ and /∫/. Specifically, the study tested the hypotheses that during adaptation to a perturbation of vocal-tract shape, high-acuity speakers use motor equiv...

A Steiner triple system (STS) (a twofold triple system (TTS)) is a pair (V, B) where V is a v-set, and B is a collection of 3-subsets of V called blocks or triples such that every 2-subset of V is contained in exactly one [exactly two] blocks. The number v is called the order of the STS or TI'S. It is well-known that an STS of order v exists if and only if v 1 or 3 (mod 6), and a T r s of order...

Monaural speech segregation is an important problem in robust speech processing and has been formulated as a supervised learning problem. In supervised learning methods, the ideal binary mask (IBM) is usually used as the target because of its simplicity and large speech intelligibility gains. Recently, the ideal ratio mask (IRM) has been found to improve the speech quality over the IBM. However...