Advanced Signal Processing Seminar 2
Voice over IP
Voice over IP
In the mid 90's, Internet telephony started as a means to bypass high costs
for long-distance calls. Today's converged communication networks carry
both voice and data with packet-switching protocols auch as the Internet
Protocol (IP). Voice over IP will become the future standard paradigm for
voice telephony where the high quality expectations of the user are met
by advanced signal processing and protocol engineering methods.
Suggested Topics for Seminar Presentations
Packet-Switched Networks
Circuit switching versus packet switching
for real-time services
The Internet Protocol: from IP4 to IP6
H.323 (International Telecommunication
Union) and SIP (Internet Engineering Task Force)
Quality of Service: parameters and
mechanisms
Speech Coding
Fundamentals of speech coding: quality
- rate - delay - complexity, redundancy and irrelevance removal
Speech coding algorithms for wireline and
mobile telephony
Speech coding algorithms for IP networks
Network Signal Processing Algorithms
Echo cancellation
Packet collision repair and error concealment
Joint source-channel coding
Multiple-description coding
State-of-the-Art, Usability and Emerging
Applications
End-to-end Quality of Service and ETSI's
TIPHON project
Install and test free software over Graz-Stockholm
connection, write usability report
Commercial solutions overview and comparative
analysis (define set of criteria)
Voice over IP for UMTS and xDSL
Organization
The seminar is organized by the newly established
Signal
Processing and Speech Communication Laboratory at the Institute for
Communications and Wave Propagation of TU Graz. Students will study a selected
topic, prepare a WWW presentation, and present it in class during a 45
minute discussion session. Work in small groups of 2 or 3 students is strongly
encouraged. Parts of the seminar are coordinated with the Speech
Signal Processing Group at KTH Stockholm such that international student
teams may engage in remote collaboration on selected topics. The working
language will be English.
The first meetingwill
be held in lecture hall i11 at TU Graz, Inffeldgasse 16, on Friday,
March 9, 2001 at 9:00 a.m. This will be
used to assign groups and topics, and to coordinate the seminar schedule.
Web Presentations over Seminar Topics
References/Course Material
Books
Journal Articles
M. Budagavi and J.D. Gibson: "Speech Coding in Mobile Radio Communications,"
Proceedings of the IEEE, vol. 86, July 1998.
Y. Wang and Q.-F. Zhu, "Error control and concealment for video communication:
A review," Proceedings of the IEEE, vol. 86, pp.974-997, May 1998.
R.
Arean, J. Kovacevic and V. K Goyal, "Multiple description perceptual audio
coding with correlated transforms,'' IEEE Trans. Speech and Audio Proc.,
vol. 8, pp. 140-145, March 2000.
Conference Papers
Proceedings
of the 32nd Asilomar Conference on Signals, Systems, and Computers,
Pacific Grove (CA), Nov 1998
Proceedings
of the IEEE International Conference on Acoustics, Speech and Signal Processing,
ICASSP'99, Phoenix (AZ), March 1999
Proceedings
of the 1999 IEEE Workshop on Speech Coding, Porvoo (Finland), June 1999
Proceedings
of the 6th European Conference on Speech Communication and Technology,
EUROSPEECH'99, Budapest (Hungary), Sep 1999
Proceedings
of the IEEE International Conference on Acoustics, Speech and Signal Processing,
ICASSP'2000, Istanbul (Turkey), June 2000
Links