Proceedings of the 11th International Workshop on Network and Operating Systems Support For Digital Audio and Video, 2001
ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Su... more ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Such agents tile N video frames into one, by modi cation of their respective meta-data and adjustment of their video frame rate if necessary. The spatial tiling agents are located within a network, and participants in the session unicast video to the `closest' agent. The agent then multicast the tiled video to the group of all participants. Results show that spatial tiling increases the ability of the end-user to receive large numbers of video streams and reduces network load both in terms of bandwidth and in packets per second. The result is a signi cant scaling boost to video conferencing systems.
Much work has focused on the problems of small group communication and of one-to-many broadcast, ... more Much work has focused on the problems of small group communication and of one-to-many broadcast, while issues in large scale interactive networked teleconferences have received less attention. In this paper, we consider the problems inherent in conducting large scale conferences: teleconferences with hundreds, or perhaps thousands, of active participants. The lessons learnt from our design for a digital amphitheater -- a system based on active agents, where about one hundred remote participants can conference together -- are discussed. In that system we successfully overcame end system limitations by off-loading some processing into the network, thus creating parallelism and reducing the bottleneck inherent in the serial nature of the hosts managing each display.
... Abstract. This memo describes the ATM call control signaling exchanges needed to support Clas... more ... Abstract. This memo describes the ATM call control signaling exchanges needed to support Classical IP over ATM implementations as described in RFC 1577 [LAUB94]. ... Perez, Liaw, Mankin, Hoffman, Grossman & Malis [Page 1] RFC 1755 ATM Signaling... ...
Network and Operating System Support for Digital Audio and Video, 2000
In this paper, we present the design of what we havetermed a Digital Amphitheater (DA). The DA is... more In this paper, we present the design of what we havetermed a Digital Amphitheater (DA). The DA is anetwork teleconferencing architecture and applicationthat aims to assemble together remote participantsinto a virtual lecture hall or amphitheater. Oneof the main uses that we envision for the DA is thatof hosting a technical conference with hundreds ofremote participants. (In fact we plan to
Proceedings of the 11th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2001), 2001
ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Su... more ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Such agents tile N video frames into one, by modi cation of their respective meta-data and adjustment of their video frame rate if necessary. The spatial tiling agents are located within a network, and participants in the session unicast video to the `closest' agent. The agent then multicast the tiled video to the group of all participants. Results show that spatial tiling increases the ability of the end-user to receive large numbers of video streams and reduces network load both in terms of bandwidth and in packets per second. The result is a signi cant scaling boost to video conferencing systems.
Experiments with Delivery of HDTV over IP Networks Colin Perkins Ladan Gharai Tom Lehman Allison ... more Experiments with Delivery of HDTV over IP Networks Colin Perkins Ladan Gharai Tom Lehman Allison Mankin USC Information Sciences Institute 15 March 2002 ... Our initial testing was conducted over SuperNet between ISI East (Arlington, VA) and CMU (Pittsburgh, PA). ...
Abstract This paper discusses experience gained while implementing Vince, a publicly available so... more Abstract This paper discusses experience gained while implementing Vince, a publicly available software package for the development of protocols in ATM networks. Vince provides a simple set of general abstractions which are extremely useful for protocol ...
In this paper we address the problem of large-scale video conferencing, both from a systems and u... more In this paper we address the problem of large-scale video conferencing, both from a systems and user interface point of view. We present the architecture and current implementation of our video conferencing tool, the Digital Amphitheater, which facilitates large scale video ...
The resulting system inherits (on demand) from representations developed and maintained by partne... more The resulting system inherits (on demand) from representations developed and maintained by partners engaged in business alliances.
We have created a publicly-available implementation of IPv6 for Windows NT> Because we have ma... more We have created a publicly-available implementation of IPv6 for Windows NT> Because we have made our source code available, we hope that our implementation can serve as a base for networking research and supply sample code for other implementations. In this paper we describe our solutions for several problems that any network protocol implementation for Windows NT will encounter. Based
Proceedings of the 11th International Workshop on Network and Operating Systems Support For Digital Audio and Video, 2001
ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Su... more ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Such agents tile N video frames into one, by modi cation of their respective meta-data and adjustment of their video frame rate if necessary. The spatial tiling agents are located within a network, and participants in the session unicast video to the `closest' agent. The agent then multicast the tiled video to the group of all participants. Results show that spatial tiling increases the ability of the end-user to receive large numbers of video streams and reduces network load both in terms of bandwidth and in packets per second. The result is a signi cant scaling boost to video conferencing systems.
Much work has focused on the problems of small group communication and of one-to-many broadcast, ... more Much work has focused on the problems of small group communication and of one-to-many broadcast, while issues in large scale interactive networked teleconferences have received less attention. In this paper, we consider the problems inherent in conducting large scale conferences: teleconferences with hundreds, or perhaps thousands, of active participants. The lessons learnt from our design for a digital amphitheater -- a system based on active agents, where about one hundred remote participants can conference together -- are discussed. In that system we successfully overcame end system limitations by off-loading some processing into the network, thus creating parallelism and reducing the bottleneck inherent in the serial nature of the hosts managing each display.
... Abstract. This memo describes the ATM call control signaling exchanges needed to support Clas... more ... Abstract. This memo describes the ATM call control signaling exchanges needed to support Classical IP over ATM implementations as described in RFC 1577 [LAUB94]. ... Perez, Liaw, Mankin, Hoffman, Grossman & Malis [Page 1] RFC 1755 ATM Signaling... ...
Network and Operating System Support for Digital Audio and Video, 2000
In this paper, we present the design of what we havetermed a Digital Amphitheater (DA). The DA is... more In this paper, we present the design of what we havetermed a Digital Amphitheater (DA). The DA is anetwork teleconferencing architecture and applicationthat aims to assemble together remote participantsinto a virtual lecture hall or amphitheater. Oneof the main uses that we envision for the DA is thatof hosting a technical conference with hundreds ofremote participants. (In fact we plan to
Proceedings of the 11th International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2001), 2001
ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Su... more ABSTRACT We describe an approach to scaling video conferencing, with the use of active agents. Such agents tile N video frames into one, by modi cation of their respective meta-data and adjustment of their video frame rate if necessary. The spatial tiling agents are located within a network, and participants in the session unicast video to the `closest' agent. The agent then multicast the tiled video to the group of all participants. Results show that spatial tiling increases the ability of the end-user to receive large numbers of video streams and reduces network load both in terms of bandwidth and in packets per second. The result is a signi cant scaling boost to video conferencing systems.
Experiments with Delivery of HDTV over IP Networks Colin Perkins Ladan Gharai Tom Lehman Allison ... more Experiments with Delivery of HDTV over IP Networks Colin Perkins Ladan Gharai Tom Lehman Allison Mankin USC Information Sciences Institute 15 March 2002 ... Our initial testing was conducted over SuperNet between ISI East (Arlington, VA) and CMU (Pittsburgh, PA). ...
Abstract This paper discusses experience gained while implementing Vince, a publicly available so... more Abstract This paper discusses experience gained while implementing Vince, a publicly available software package for the development of protocols in ATM networks. Vince provides a simple set of general abstractions which are extremely useful for protocol ...
In this paper we address the problem of large-scale video conferencing, both from a systems and u... more In this paper we address the problem of large-scale video conferencing, both from a systems and user interface point of view. We present the architecture and current implementation of our video conferencing tool, the Digital Amphitheater, which facilitates large scale video ...
The resulting system inherits (on demand) from representations developed and maintained by partne... more The resulting system inherits (on demand) from representations developed and maintained by partners engaged in business alliances.
We have created a publicly-available implementation of IPv6 for Windows NT> Because we have ma... more We have created a publicly-available implementation of IPv6 for Windows NT> Because we have made our source code available, we hope that our implementation can serve as a base for networking research and supply sample code for other implementations. In this paper we describe our solutions for several problems that any network protocol implementation for Windows NT will encounter. Based
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