0-7803-7651-X/03/$17.00 © 2003 IEEE Abstract— Harmonic plus noise model (HNM) divides the speech spectrum into two bands: harmonic and noise. One is modeled with harmonics of the fundamental and the other is simulated using random noise. As HNM analysis/synthesis is performed at each glottal closure instant (GCI), errors in estimation of GCIs affect the quality of the synthesized speech. The ob...

A vocoder-based speech synthesis system, named WORLD, was developed in an effort to improve the sound quality of realtime applications using speech. Speech analysis, manipulation, and synthesis on the basis of vocoders are used in various kinds of speech research. Although several high-quality speech synthesis systems have been developed, real-time processing has been difficult with them becaus...

This paper investigates the effect of Gaussian window frequency response Side lobe Attenuation on the improvement of Speech quality in terms of six objective quality measures. In Speech Enhancement process, signal corrupted by noise is segmented into frames and each segment is Windowed using Gaussian window with variation in the side lobe attenuation parameter “α”. The Windowed Speech segments ...

The growth and increased competition in the secondgeneration (digital) cellular communication market has led service providers to improve the speech quality in their systems by introducing enhanced speech coders. Advancements in speech coding allowed designers to aim at toll-quality for these enhanced coders, and investigation of the impact of speech coders on the end-to-end quality of the publ...

The E-model brings a modern approach to the computation of estimated quality, allowing for easy implementation. One of its advantages is that it can be applied in real time. The method is based on a mathematical computation model evaluating transmission path impairments influencing speech signal, especially delays and packet losses. These parameters, common in an IP network, can affect speech q...

Recent development in telecommunication services, such as VoIP in NGN and car communications has become increasingly necessary for use of hands-free communication system using separate microphones and loudspeakers. Hands-free system has been largely affected by noisy circumstances. This paper describes experimental results and perspectives for subjective and objective quality assessment of nois...

The purpose of standardisation of the ergonomic assessment of speech communications is to assure a certain level of speech communication quality for various applications. The quality of speech communications is assessed in case of warning, danger, or information messages for work places, public areas, meeting rooms, and auditoria. In many applications direct communication between humans is cons...

Speech sinusoidal modeling has been successfully applied to a broad range of speech analysis, synthesis and modification tasks. However, developing a high fidelity full band sinusoidal model that preserves its high quality on speech transformation still remains an open research problem. Such a system can be extremely useful for high quality speech synthesis. In this paper we present an enhanced...