Extending OSI to support synchronization required by multimedia applications
Computer Communications
IEEE/ACM Transactions on Networking (TON)
End-to-end delay analysis of videoconferencing over packet-switched networks
IEEE/ACM Transactions on Networking (TON)
Negotiating Use: Making Sense of Mobile Technology
Personal and Ubiquitous Computing
PARK: A Paused-And-Run K-Stream Multimedia Synchronization Control Scheme
ICDCS '00 Proceedings of the The 20th International Conference on Distributed Computing Systems ( ICDCS 2000)
An agent based synchronization scheme for multimedia applications
Journal of Systems and Software - Special issue: Quality software
Low-Latency Live Video Streaming over Low-Capacity Networks
ISM '06 Proceedings of the Eighth IEEE International Symposium on Multimedia
Multimedia streaming via TCP: An analytic performance study
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
An audio wiki supporting mobile collaboration
Proceedings of the 2008 ACM symposium on Applied computing
Mobile collaborative live video mixing
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
Lean collaboration through video gestures: co-ordinating the production of live televised sport
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Less talk, more rock: automated organization of community-contributed collections of concert videos
Proceedings of the 18th international conference on World wide web
Mobicast: a system for collaborative event casting using mobile phones
Proceedings of the 8th International Conference on Mobile and Ubiquitous Multimedia
Instant broadcasting system: mobile collaborative live video mixing
ACM SIGGRAPH ASIA 2009 Art Gallery & Emerging Technologies: Adaptation
Swarm synchronization for multi-recipient multimedia streaming
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Mobile broadcasting: the whats and hows of live video as a social medium
Proceedings of the 12th international conference on Human computer interaction with mobile devices and services
Amateur vision and recreational orientation:: creating live video together
Proceedings of the ACM 2012 conference on Computer Supported Cooperative Work
Proceedings of Workshop on Mobile Video Delivery
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The advent of modern mobile phones, 3G networks, and live video streaming has made it possible to broadcast live video from mobile devices. This is now giving rise to a new class of applications which enable mobile collaborative live video production, in which groups of amateurs work together to provide a rich broadcast of events. We focus on new and expected synchronization problems that arise in these more complex systems when broadcasting live events because of the delays that often occur in streaming over internet and mobile networks. The problem has been investigated by acquiring initial user feedback, as well as conducting technical delay measurements of two examples of such systems and relating them to existing literature. We identified two types of technical problems which affect the mixing of the streams, namely the difference in delay in multiple streams, a.k.a. asynchrony among streams, and the delay between the event itself and its presentation in the mixer. These problems affect the mixing in various ways depending on whether or not the director has visual access to the unmediated event. This knowledge has then been used to inform the conceptualization of identifiable ways of handling delays and synchronization. We suggest the introduction of a software feature providing context-dependent delay, in which these requirements can be balanced differently to fit specific contexts of use. We specifically address the different types of mixing which occurs when the director, or mixer, only has access to the topic through the mobile media ("out of view"), as well as mixing in a context in which the topic also is physically present ("in-view") in front of the mixer.