Open AccessProceedings Article
Wireless network synchronization for multichannel multimedia services
Yonghwan Bang,Jongpil Han,Kyusang Lee,Jongwon Yoon,Jinoo Joung,Sungbo Yang,June-Koo Kevin Rhee +6 more
- Vol. 02, pp 1073-1077
TLDR
This paper implements IEEE 1588 Precision Time Protocol in wireless LAN devices to characterize delay jitter and clock synchronization accuracy, and indicates a strong potential to provide a high fidelity real-time multi-channel multimedia networking service within 430-microsecond synchronization accuracy at an approximately 80 Mbps streaming rate.Abstract:
When a single source of multimedia contents is distributed to multiple reproduction devices, the audio and video contents require synchronous play for multi-channel stereo sound and lip-synchronization. This paper investigates capability of IEEE 802.11n wireless LANs for providing synchronized services of real-time multimedia traffic. We implement IEEE 1588 Precision Time Protocol in wireless LAN devices to characterize delay jitter and clock synchronization accuracy. The results indicate a strong potential to provide a high fidelity real-time multi-channel multimedia networking service within 430-microsecond synchronization accuracy at an approximately 80 Mbps streaming rate.read more
Citations
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Journal ArticleDOI
Clock Synchronization Over IEEE 802.11—A Survey of Methodologies and Protocols
TL;DR: This survey looks into the details of synchronization over IEEE 802.11 with a particular focus on the infrastructure mode which is most relevant for industrial use cases and highlights the different parameters which affect the performance of clock synchronization over WLAN and compares the performances of existing synchronization methods to analyze their shortcomings.
Proceedings ArticleDOI
Towards high accuracy in IEEE 802.11 based clock synchronization using PTP
TL;DR: This paper proposes an approach to import the precision time protocol to IEEE 802.11, and finds that standard nodes are enhanced with software timestamping, leading to a synchronization accuracy of a few microseconds.
Journal ArticleDOI
Hybrid Broadcast/Broadband TV Services and Media Synchronization: Demands, Preferences and Expectations of Spanish Consumers
TL;DR: The concept and some examples of hybrid TV media services are presented, emphasizing the importance of including a combination of media synchronization solutions, known as hybrid sync, to guarantee a satisfactory level of quality of experience.
Journal ArticleDOI
Understanding Timelines Within MPEG Standards
TL;DR: This paper provides a comprehensive review of how clock references (timing) and timestamps (time) are conveyed and interpreted when using the most widespread delivery technologies, such as DVB, RTP/RTCP and MPEG standards (e.g., MPEG-2, MPEG4, MPEG-DASH, and MMT).
Patent
Method and apparatus for time synchronisation in wireless networks
TL;DR: In this article, a wireless media distribution system is provided comprising an access point (6) for broadcasting media and a plurality of stations (2) for reception and playback of media, each station is configured for receiving and decoding a timestamp in a beacon frame transmitted repeatedly from the access point.
References
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Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems
Kang B. Lee,J Eldson +1 more
TL;DR: A protocol is provided in this standard that enables precise synchronization of clocks in measurement and control systems implemented with technologies such as network communication, local computing, and distributed objects.
Proceedings ArticleDOI
IEEE 1588 standard for a precision clock synchronization protocol for networked measurement and control systems
J C. Eidson,Kang B. Lee +1 more
TL;DR: This paper discusses the major features and design objectives of the IEEE-1588 standard, designed to serve the clock synchronization needs of industrial systems, and recent performance results of prototype implementations of this standard in an Ethernet environment are presented.
Journal ArticleDOI
Human perception of jitter and media synchronization
TL;DR: The results show that skews between related data streams may still give the effect that the data is 'in sync' and the author uses the findings to develop a scheme for the processing of nontrivial synchronization skew between more than two data streams.
Journal ArticleDOI
The timed asynchronous distributed system model
Flaviu Cristian,Christof Fetzer +1 more
TL;DR: In this article, the authors propose a formal definition for the timed asynchronous distributed system model and present extensive measurements of actual message and process scheduling delays and hardware clock drifts, which confirm that this model adequately describes current distributed systems such as a network of workstations.