Losing VoIP packets or speech frames decreases the perceptual speech quality. The statistical relation between randomly lost speech frames and speech quality is well known. In cases of bursty and ratedistortion optimized losses, a precise quality model is required to relate losses to quality. In the present paper, we present a model that is based on the loss impact or the importance of single s...

This paper addresses the problem of reconstructing wideband speech signals from observed narrowband speech signals. The goal of this work is to improve the perceived quality of speech signals which have been transmitted through narrowband channels or degraded during acquisition. We describe a system, based on linear predictive coding, for estimating wideband speech from narrowband. This system ...

This paper presents an experimental German speech synthesis system. As in case of a Czech text-to-speech system ARTIC, statistical approach (using hidden Markov models) was employed to build a speech segment database. This approach was confirmed to be language independent and it was shown to be capable of designing a quality database that led to an intelligible synthetic speech of a high qualit...

We present a method for objective quality evaluation of noise-reduced speech. The experimental results indicate that residual noise and the distortion of speech and noise influence the perceived degradation of speech quality. Therefore, the proposed method is developed based on the relationship among three factors and subjective quality. We verify the validity of the method by comparing subject...

In this paper, we investigate different approaches in crowdsourcing transcriptions of Dialectal Arabic speech with automatic quality control to ensure good transcription at the source. Since Dialectal Arabic has no standard orthographic representation, it is very challenging to perform quality control. We propose a complete recipe for speech transcription quality control that includes using out...

AlxwaciThis contribution introduces instrumental speech quality measures for the GSM system based only on transmission parameters. Certain combinations of CSM parameters which quantify the transmission quality in terms of bit error rate, received power level, etc., were shown be suitable for the prediction of the resulting speech quality. Neither the original nor the received speech signal is n...

This paper is aimed at to study LPC for Natural speech with different windowing techniques the effect of window shape on improving the speech quality by reducing the noise with the help of fixed and variable Windows with optimum shape. In the speech process signal corrupted by noise is segmented into frames and each segment is windowed using different Window with variation in the shape paramete...

In statistical speech synthesis, the quality of the synthesized speech depends on the quality of training data. As the sampling rate of speech is one of the effective factors, speech data has been recently recorded at a high sampling rate. However, the sampling rates of speech data recorded in the past or collected from the Internet were often low. Therefore, to use these speech data effectivel...

The paper presents speech enhancement scheme for suppression of different background noises. The objective of speech enhancement is to improve the quality of the processed speech. This paper also investigate the use of two different transforms for speech enhancement. Speech enhancement using wiener filtering approach is presented using transforms DFT and DCT. The type of transform shows differe...

Given a baseline speech coder and speech with an available phonetic class segmentation, a number of potential enhancements to that coder become possible. While the quality of speech segmentation by phoneme and phonetic class is constantly improving, we use TIMIT to generate phonetic class segmentation as a basis for initial testing of these techniques. Using coders drawn from the MELP family, w...