In this paper we show that time-frequency averaging of noise compensation filters, estimated using well-known techniques such as spectral subtraction, Wiener filtering and Ephraim-Malah approach, improves the performance of automatic speech recognition system in non-stationary noisy environments. The experiments were conducted on a multilingual isolated word recognition task in signal to noise ...

In this paper, we propose a new method for speech recognition in the presence of non-stationary and unpredictable noise by extending PreFEst [4]. The method does not need to know noise characteristics in advance and does not even estimate them in its process. A small set of pre-evaluations demonstrates the feasibility of the method by demonstrating good performance with a signal-to-noise ratio ...

Objectives: To identify and assess the level of development of motor abilities in older pre-school -age children with speech disorder. Methods: The study included 200 older pre-school age children, 100 children with a healthy level of speech development and 100 with speech disorder, in Belgorod and Belgorod region (Russian Federation). The study looked at scientific sources; motor abilities te...

In speech enhancement, the decision-directed (DD) approach to compute the a priori SNR is often used to reduce the musical tones. However, the constant DD weighting factor very close to one results in more speech distortion during transitional speech segments. Contrarily, a time-varying weighting factor gives less speech distortion but with more residual noise in speech pause. In this contribut...

In this paper, the implementation of a robust front-end to be used for a large-vocabulary Continuous Speech Recognition (CSR) system based on a Voiced-Unvoiced (V-U) decision has been addressed. Our approach is based on the separation of the speech signal into voiced and unvoiced components. Consequently, speech enhancement can be achieved through processing of the voiced and the unvoiced compo...

The present status of Japanese speech database has been described. The database project in Japan started in early 1980s. The first one was a committee of Japan Electronic Industry Development Association, abbreviated as JEIDA, which aimed at creating a speech database that can commonly evaluate performance of the then existing speech input/output machines and systems. Several database projects ...

Private speech utilization is accepted to have a critical role in the continuum of language acquisition. As a valuable device in studying learners’ talk during interaction, a language related episode (LRE) is any part of a dialogue where a student speaks about a language problem s/he comes across while completing a task. The present study investigated the role of private speech produced by Inte...

Computers have been used for language teaching ever since the 1960's.Learning a second language is a challenging endeavor, and, for decades now, proponents of computer assisted language learning (CALL) have declared that help is on the horison. We investigate the suitability of deploying speech technology in computer based systems that can be used to teach foreign language skills. In this case,...

Speech perception runs smoothly and automatically when there is silence in the background, but when the speech signal is degraded by background noise or by reverberation, effortful cognitive processing is needed to compensate for the signal distortion. Previous research has typically investigated the effects of signal-to-noise ratio (SNR) and reverberation time in isolation, whilst few have loo...