In this work we present a telephone speech database for Basque, compliant with the guidelines of the Speechdat project. The database contains 1060 calls from the fixed telephone network. We first describe the main aspects of the database design. We also present the recognition results using the database and a set of procedures following the language independent reference recogniser commonly nam...

This article presents an overview of the POLYCOST database dedicated to speaker recognition applications over the telephone network. The main characteristics of this database are: large mixed speech corpus size (> 100 speakers), English spoken by foreigners, mainly digits with some free speech, collected through international telephone lines, and more than eight sessions per speaker.

Abstract: A measurement system for in-service characterization of telephone-type networks is described. It is based on in-line Digital Signal Processing of the transmitted signal observed at an easily accessible test-point. The adopted techniques for the estimation of the considered parameters are summarized and discussed, together with an example of a measurement session performed on a real-li...

P2P (Peer-to-Peer) technologies are well established and have now become accepted as a mainstream networking approach. However, the explosion of participating users has not been replicated within the mobile networking domain. Until recently the lack of suitable hardware and wireless network infrastructure to support P2P activities was perceived as contributing to the problem. This has changed w...

In this paper, we study the fundamental problem of gossip in the mobile telephone model: a recently introduced variation of the classical telephone model modified to better describe the local peer-to-peer communication services implemented in many popular smartphone operating systems. In more detail, the mobile telephone model differs from the classical telephone model in three ways: (1) each d...

iran is a rather wide country, and, as a rule, the chrage per one call in s. t .d . (subscriber trunk dialing ) is required more compared with a local call , so, just after the opening of the std service widely in national telephone network, unconcerned use of the s. t. d. service has been caused on an incon- ceivable increase in telephone charge of th subscriber. this is a common problem for a...

Local Number Portability (LNP) is an Intelligent Network (IN) service, which provides end users the ability to change local telephone service providers without changing their telephone numbers. LNP is a key service for increasing competition in the local telephone marketplace. To implement LNP, Number Portability Administration Center (NPAC) is needed to manage the LNP databases. Service provid...

Recent large deployment of high-speed metro Ethernet networks creates opportunity to connect legacy telephone exchange centers and cellular telephone base stations to the core telephony network. The success of data and legacy voice services convergence shall depend on whether it can provide the customer with the required QoS or not. Packet-base telephony service requires stringent bounds on end...