Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Frame Rate Exclusive Sync Management of Live Video Streams in Collaborative Mobile Production Environment
Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
Stockholm University, Faculty of Social Sciences, Department of Computer and Systems Sciences.
2014 (English)In: Proceedings of Workshop on Mobile Video Delivery, New York: Association for Computing Machinery (ACM), 2014, nr 2- p.Conference paper, Published paper (Refereed)
Abstract [en]

We discuss synchronization problem in an emerging type of multimedia applications, called live mobile collaborative video production systems. The mobile character of the production system allows a director to be present at the site where he/she can see the event directly as well as through the mixer display. In such a situation production of a consistent broadcast is sensitive to delay and asynchrony of video streams in the mixer console. In this paper, we propose an algorithm for this situation called "frame rate exclusive sync manager", which draws on existing reactive source control synchronization techniques. It relies solely on frame-rate control and maintains synchronization between live video streams while ensuring minimal delay by dynamically adapting the frame-rate of the camera feeds based on synchronization offset and network bandwidth health. The algorithm is evaluated by simulation which indicates algorithm's capability of achieving increased synchronization among live streams.

Place, publisher, year, edition, pages
New York: Association for Computing Machinery (ACM), 2014. nr 2- p.
Keyword [en]
Synchronization, production, video, mobility, live broadcast, streaming, collaborative, frame rate adjustment, network delay.
National Category
Human Computer Interaction
Research subject
Computer and Systems Sciences
Identifiers
URN: urn:nbn:se:su:diva-124241DOI: 10.1145/2579465.2579466ISBN: 978-1-4503-2707-7 (print)OAI: oai:DiVA.org:su-124241DiVA: diva2:882892
Conference
Workshop on Mobile Video Delivery (MoViD'14), Singapore, March 19 - 21, 2014
Available from: 2015-12-16 Created: 2015-12-16 Last updated: 2016-01-04Bibliographically approved
In thesis
1. Live Mobile Video Interaction: Inventing and investigating technology, formats and applications
Open this publication in new window or tab >>Live Mobile Video Interaction: Inventing and investigating technology, formats and applications
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The convergence of inexpensive video-enabled mobile phones, high-speed mobile data networks and ubiquitous sensing devices opens up a new design space called “live mobile video interaction”. It gives rise to a new genre of applications concerning live mobile video production, which can be seen as an instance of the said space. In this work we are particularly interested to explore potential technical challenges and opportunities presented by “live mobile video interaction”. We started our investigation by studying two existing prototypes from the said genre i.e. the Instant Broadcasting System (IBS) and the Mobile Vision Mixer (MVM). We studied their applicability for amateur users of collaborative mobile video production tools and the problems caused by inherent communication delays in the Internet. We acquired initial user feedback and conducted technical tests on Instant Broadcasting System (IBS) and Mobile Vision Mixer (MVM). Our results indicate that lack of synchronisation among video streams causes problems for directors in such systems that were not present in professional systems. We also identified two distinct video production modes depending on visual access of the director to the event that is being filmed. Based on our study we proposed technical design suggestions and indications on how to solve the synchronisation problems in respective mixing modes. We also proposed an algorithm for frame-rate exclusive synchronisation management of live streams in a collaborative mobile production environment. We further probed the design space using the research through design method, which resulted in a fully functional prototype system called “Livenature” that would incite an emotional connection that exists between people and the places they cherish. Further investigation of Livenature allowed us to produce detailed studies about experiential and technical aspects of the system, thus revealing phenomenological and technical dimensions of the design space.

Place, publisher, year, edition, pages
Stockholm: Department of Computer and Systems Sciences, Stockholm University, 2015
Series
Report Series / Department of Computer & Systems Sciences, ISSN 1101-8526 ; 16-001
Keyword
human computer interaction, liveness, live, ambient video, mobile webcasting
National Category
Human Computer Interaction Computer and Information Science
Research subject
Computer and Systems Sciences
Identifiers
urn:nbn:se:su:diva-124317 (URN)978-91-7649-324-3 (ISBN)
Public defence
2016-02-04, Lilla hörsalen, NOD-huset, Borgarfjordsgatan 12, Kista, 13:00 (English)
Opponent
Supervisors
Available from: 2016-01-12 Created: 2015-12-17 Last updated: 2015-12-22Bibliographically approved

Open Access in DiVA

fulltext(945 kB)29 downloads
File information
File name FULLTEXT01.pdfFile size 945 kBChecksum SHA-512
2b3a03cf761061d2fe47ff244b4531e2429420e3cca49b5c332e510ca3f44a560356d9a717b8b46768331c02efb1b19f6538f61713be9f70ef0ddceaa7b393a0
Type fulltextMimetype application/pdf

Other links

Publisher's full texthttp://dl.acm.org/citation.cfm?id=2579466

Search in DiVA

By author/editor
Mughal, Mudassar AhmadJuhlin, Oskar
By organisation
Department of Computer and Systems Sciences
Human Computer Interaction

Search outside of DiVA

GoogleGoogle Scholar
Total: 29 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 58 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf