An Internet telephony system is basically a computer-form of a conventional telephone to support real-time voice communication between two or more users who are connected to the Internet. Internet telephony circumvents expensive international telephone toll charges by using Internet as an intermediary medium to transport voice signals between two users. In doing so, transcontinental telephone c...

In this paper we present a new method for nonlinear compensation of distortions, e.g. channel effects and additive noise, in clean and telephone speech recognition. A Bidirectional Neural Network (BidiNN) was developed and implemented in order to modify distorted input feature vectors and improve the overall recognition accuracy. Distorted components in feature vectors were estimated in accorda...

This paper describes the design, collection and postprocessing of the French SpeechDat corpus FRESCO. Being a database of approximately 35,000 utterances recorded from 1000 callers over the terrestrial telephone network in France, it comprises immediately usable and relevant speech for the initial training and assessment of speaker-independent phoneme-model or wordmodel based speech recognizers...

This study examines the substitution effect between fixed-line and mobile telephony while controlling for the consumption externality associated with telephone networks. A dynamic demand model is estimated using a global telecommunications panel dataset comprised of 56 countries from 1995–2000. Estimation results show the presence of a substantial substitution effect. Additionally income and ow...

The plan of transmission parameters or the network plan was created for Czech Republic in 2005 and this plan has had key effect on traffic in the telecommunication networks providing public telephone service, including mobile networks, NGN networks based on IP protocol and private networks connected to public telephone network. This paper describes practical effects of aforesaid plan on some ty...

Technologies such as Bluetooth, RFID, WiFi, 4G, and the Internet of things are mutually converged with ADSL and fiber to the home network. Users can get information in the forms of word, voice, images, etc. through ubiquitous networks including the fixed telephone, the mobile telephone, the television, the computer, and diversified informational zed terminal equipment. Ubiquity informatization ...