Research in Multimedia Systems at UNC
Relatively inexpensive hardware for processing audio and video data
is rapidly becoming available for personal computers and workstations.
At the same time, greater network bandwidth at lower prices is making
its way to the desktop. These developments have stimulated interest
in distributed applications that require new capabilities for processing
streams of digitized audio and video data.
For example, we have developed a workstation-based conferencing system
that provides audio and video links between workstations and supports
sharing of existing single-user applications between multiple users.
To realize the full potential of these applications, real-time communication
and computation services are often required -- services that do not exist in
most desktop computing environments. This research seeks to develop systems
infrastructure for multimedia applications. The current focus is on network
and operating system support for the real-time transmission and processing
of audio and video data in a distributed system.
For a more detailed description of this work, click
here and
here.
This research is carried out by the
Distributed and Real-Time
Systems (DiRT) research group.
Current Projects & Students
- Active queue qanagement for real-time multimedia networking --
Mark Parris
- Adaptive, rate-based scheduling --
Steve Goddard
- Traffic measurement and charcterization of the NC GigaPOP --
Don Smith
Faculty
Related Research Projects at UNC
Selected Papers (Listed in reverse chronological order)
(Click here for an
alphabetical listing of all papers stored on-line, or a list papers on-line
sorted by publication venue (conference/journal).
Also, copies of slides for talks about some of these papers are available
on-line.
Click here for a list.)
- Beyond Audio and Video: Multimedia Networking Support for Distributed,
Immersive Virtual Environments
- EUROMICRO 2001, September 2001.
- Get:
full citation and abstract - or -
PostScript (compressed) - or -
PDF copy of this paper.
- (A copy of the
slides for the talk presented at the conference is also available.)
- Experiments in Best-Effort Multimedia Networking for a Distributed Virtual Environment
- ACM/SPIE Multimedia Computing and Networking 2001, January 2001.
- Get:
full citation and abstract - or -
PostScript (compressed) - or -
PDF copy of this paper.
- (A copy of the
slides for the talk presented at the conference is also available.)
- Responsive vs. Unresponsive Traffic: Active Queue Management for a Better-Than-Best-Effort Service
- Technical Report, September 2000.
- Get:
full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- Towards a Better-Than-Best-Effort Forwarding Service for Multimedia Flows
- IEEE Multimedia, December 1999.
- Get:
full citation and abstract and/or PostScript/PDF copies of the paper.
- Application-Level Measurements of Performance on the vBNS
- IEEE Intl. Conference on Multimedia Computing and Systems, June 1999.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- Lightweight Active Router-Queue Management for Multimedia Networking
- ACM/SPIE Multimedia Computing and Networking 1999, January 1999.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- (A copy of the
slides for the talk presented at the conference is also available.)
- A Better-Than-Best-Effort Service for Continuous Media UDP Flows
- Intl. Workshop on Network and Operating System Support for Digital
- Audio and Video, July 1998.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- (A copy of the
slides for the talk presented at the conference is also available.)
- A Two-Dimensional Audio Scaling Enhancement to an Internet Videoconferencing System
- Intl. Workshop on Audio-Visual Services over Packet Networks, September 1997.
- Get: full citation and abstract - or -
PostScript (compressed) - or -
PDF
copy of this paper.
- The Performance of Two-Dimensional Media Scaling for Internet Videoconferencing
- Intl. Workshop on Network and Operating System Support for Digital
- Audio and Video, May 1997.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- (A copy of the
slides for the talk presented at the conference is also available.)
- On the Duality between Resource Reservation and Proportional Share Resource Allocation
- ACM/SPIE Multimedia Computing and Networking 1997, February 1997.
- Get: full citation and abstract - or -
PostScript
- or -
PDF copy of this paper.
- A General Framework for Continuous Media Transmission Control
- IEEE Conference on Local Computer Networks, October 1996.
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- A Router-Based Congestion Control Scheme For Real-Time Continuous Media
- Intl. Workshop on Network and Operating System Support for Digital
- Audio and Video, April 1996.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- A Rate-Based Execution Abstraction For Multimedia Computing
- Intl. Workshop on Network and Operating System Support for Digital
- Audio and Video, April 1995.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- An Empirical Study of a Jitter Management Scheme for Video Teleconferencing
- ACM Multimedia Systems, January 1995.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- Two-Dimensional Scaling Techniques For Adaptive, Rate-Based
Transmission Control of Live Audio and Video Streams
- ACM Multimedia '94, October 1994.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- Adaptive, Best-Effort Delivery of Live Audio and Video Across Packet-Switched Networks (VHS Video)
- ACM Multimedia '94, October 1994.
- Get: full citation and abstract - or - PostScript copy of the abstract, or an MPEG clip
- of the video (~3 Mbytes).
- Transport and Display Mechanisms For Multimedia Conferencing Across Packet-Switched Networks
- Computer Networks and ISDN Systems, July 1994.
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- On Latency Management in Time-Shared Operating Systems
- IEEE Workshop on Real-Time Operating Systems and Software, May 1994
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- Queue Monitoring: A Delay Jitter Management Policy
- Intl. Workshop on Network and Operating System Support for Digital Audio and
- Video, November 1993.
- Get: full citation and abstract - or -
PostScript - or -
PDF copy of this paper.
- Adaptive, Best-Effort, Delivery of Audio and Video Data Across Packet-Switched Networks
- Intl. Workshop on Network and Operating System Support for Digital Audio and
- Video, November 1992.
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- On Kernel Support for Real-Time Multimedia Applications
- IEEE Workshop on Workstation Operating Systems, April 1992.
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- Kernel Support for Live Digital Audio and Video
- Intl. Workshop on Network and Operating System Support for Digital Audio and
- Video, November 1991 (also in Computer Communications, July 1992).
- Get: full citation and abstract - or -
PostScript - or -
PDF
copy of this paper.
- System Design for Workstation-Based Conferencing With Digital Audio and Video
- IEEE Conference on Communication Software: Communications for Distributed
- Applications and Systems, April 1991.
- Get: full citation and abstract.
- Designing a Workstation-Based Conferencing System Using the Real-Time Producer/Consumer Paradigm
- Intl. Workshop on Network and Operating System Support for Digital Audio and
- Video, November 1990.
- Get: full citation and abstract.
Last updated Thu Jul 21 20:50:55 EST 1998
by jeffay at cs.unc.edu.