This article outlines the economic feasibility of mobile operators that combine nationwide mobility with 3G networks and hot spot coverage with WLANS. WLANs are based on HIPERLAN/2 architecture and the UMTS network exploits WCDMA/FDD technology. The evaluated business scenarios are focused on two different deployment areas, in terms of demographic characteristics and mobile penetration: a large...

In this paper we propose an adaptive multi-modal verification system comprised of a modified Minimum Cost Bayesian Classifier (MCBC) and a method to find the reliability of the speech expert for various noisy conditions. The modified MCBC takes into account the reliability of each modality expert, allowing the de-emphasis of the contribution of opinions from the expert affected by noise. Reliab...

Map construction and task-oriented navigation constitute two important capabilities for mobile robots. Despite their value, progress to date in the development of stand-alone robots endowed with these capabilities has been limited. We describe an architecture for mobile robots based on the concept of semi-autonomy that employs communication with a human advisor in order to simplify the tasks of...

The application of a DSP96002 digital signal processor in measuring and transferring data, setting the preemphasis constants, and communicating with the MR tomograph is described in the paper. The application of the digital signal processor represents a modern approach to real-time processing of MR signals. The objective is to obtain distance communication with the tomograph via the Internet. K...

This paper describes a new formant analysis technique whereby the formant parameters are represented in the form of Gaussian mixture distributions. These are estimated from the Discrete Fourier Transform (DFT) magnitude spectrum of the speech signal. The parameters obtained are the means, variances and the masses of the density functions, which are used to calculate centre frequencies, bandwidt...

This document specifies the packetization scheme for encapsulating the 12-bit nonlinear, 20-bit linear and 24-bit linear audio data streams into a payload of the Real-time Transport Protocol (RTP). This draft also specifies the way of SDP announcement, when the audio data is preemphasized before sampling. The treatment of preemphasized audio data specified this document could be used in other a...