We propose a simple speech compression algorithm using subband division and ADPCM (Adaptive Differential Pulse Code Modulation) algorithm. Although speech data are stored in a semiconductor memory device, its capacity and the available network capacity are limited. Therefore, it is necessary to compress the data as much as possible. The first is that the reconstructed datum must be understood c...

Phoneme detection is a useful tool to compare the perception of perfectly intelligible speech types. As previous research suggests that perception of fast speech is helped by segmental redundancy, we expected the hyperarticulation of synthetic speech to turn into an advantage at a fast rate. Consequently, the processing advantage of natural over synthetic speech was expected to decrease after t...

x Chapter 1: Introduction 1 1.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Chapter 2: MRI Background 6 2.1 MRI Physics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.1 Basic Pulse Sequences . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.1.1 Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.1.2 Readou...

BACKGROUND The authors reviewed the evidence regarding the existence of age-related declines in central auditory processes and the consequences of any such declines for everyday communication. PURPOSE This report summarizes the review process and presents its findings. DATA COLLECTION AND ANALYSIS The authors reviewed 165 articles germane to central presbycusis. Of the 165 articles, 132 art...

The aim of this paper is to investigate the effect of noises on performance of speech signal de-noising using the method based on wavelets, wiener filtering and ICA. Determination of voiced and unvoiced speech, low and high pitch, and methods for selecting appropriate wavelets for speech compression are discussed. Discrete wavelet transform (DWT) has been applied for suppression of additive noi...

This paper describes modification of a TTS system for improving the intelligibility of speech in various noise conditions. First, the GlottHMM vocoder is used for training a voice with modal speech data. The vocoder and voice parameters are then modified to mimic the properties of Lombard effect based on a small amount of Lombard speech from the same speaker. More specifically, the durations ar...

MiniMISS is a speech synthesis system designed to produce high quality synthesized speech at a number of remote locations under control from a single central computer. The core of the MiniMISS system is a new speech synthesis machine, inexpensive enough to be produced in quantity, which is placed at the remote location. It decodes a speech signal transmitted from the central computer, synthesiz...

Two audio compact discs have been developed by the Department of Veterans Affairs for use in the assessment of auditory function. This report focuses on 1) the development of the first compact disc, which contains speech materials used in routine audiologic evaluations, and 2) an introduction to the second compact disc, which contains tonal and speech materials used in more elaborate auditory e...

Previous research has shown that, when hearers listen to artificially speeded speech, their performance improves over the course of 10-15 sentences, as if their perceptual system was "adapting" to these fast rates of speech. In this paper, we further investigate the mechanisms that are responsible for such effects. In Experiment 1, we report that, for bilingual speakers of Catalan and Spanish, ...

A variable bit rate multiband excited linear predictive speech coder is proposed in this paper. Speech signal is compressed in different bit rates ranging from 0.88 kbps to 2.6 kbps according to the mode of operation and the optimum V/UV transition frequency. An average bit rate of 1.24 kbps is achieved. The proposed speech coder improves the speech quality by splitting the non-stationary speec...