Place: Hazen Hall, Room 126
University of New Brunswick
Saint John
Abstract: Alexander Graham Bell invented the telephone in 1876. With the equipment he invented, he could not communicate with his wife who was deaf. While she was in a hospital for the deaf in Boston, he spent many years trying to develop a method of communicating with his wife. He was trying to transmit voice over telegraph, the standard now is called voice over a data network. Internet is now the infrastructure for data networks. Voice can be sent over Internet as data packets. This new paradigm called Voice over Internet Protocol (VoIP) is attractive, because it is low cost.
This convergence of voice and data networks, has lead to many IP-based innovative services. However, IP was originally conceived as a transport protocol for data and not for real-time voice. Issues of delay, jitter and packet loss affect the quality of service in these converged networks. Today mainly proprietary voice compression algorithms are used to packetize voice in these networks. Interoperability exists at all stages. In this talk, signaling standards supporting voice over data networks will be discussed. Also the results from evaluating the performance of a set of audio codecs to find the suitability for real time transmission of voice, with the Real-time Transmission Protocol (RTP) payload over an IP network will be discussed. These results are mostly due to joint work with Ms. Bhuvaneshwari, a researcher from India.
About the speaker:
Dr. Janet Light
Assistant Professor
Computer Science and Applied Statistics
University of New Brunswick
Saint John Campus
https://people.unb.ca/~jlight
Note: The talk is sponsored by the CSAS Department, UNB Saint John, as part of its seminar series and sponsored by the Computer Chapter of the IEEE New Brunswick Section. This seminar is open to the public. It is not necessary to reserve a place or ask if you are permitted to attend. Admission is free. Light refreshments will be available from 12:50 p.m. to 2:10 p.m.. Visitors without valid UNB parking permits should contact Owen Kaser ( , phone 648-5728) before the talk; we have a limited number of one-day parking passes. For people travelling from Fredericton, please contact me at b.petersen@ieee.org, or phone 447-3328, to coordinate sharing transportation.