The JOURNEY active network model

Ott, Maximilian; Welling, Girish; Mathur, Shubhra; Reininger, D.; Izmailov, Rauf

doi:10.1109/49.917712

Cited by 10 publications

(5 citation statements)

References 21 publications

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“…2), using a fixedlocation content adaptation gateway, node or proxy as in conventional networking strategies ([8] [9]). Alternatively, content adaptation through transcoding can be performed dynamically where and whenever needed using active networking technologies [10]. In a virtual collaboration scenario, content can be adapted using transcoding based on two main approaches depending on the scalability of the multimedia content.…”

Section: A Content Adaptationmentioning

confidence: 99%

Content Adaptation for Virtual Office Environment Using Scalable Video Coding

Hewage

Arachchi

Masterton

et al. 2007

2007 16th IST Mobile and Wireless Communications Summit

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Abstract-Virtual collaboration concept allows remotely located partners to meet in a virtual environment using the state of the art communication and digital multimedia technologies. A virtual collaboration system is being developed under VISNET II Network of Excellence of the IST FP6 programme. This paper elaborates on a virtual collaboration scenario and proposes content adaptation technologies to fulfil needs of all participants. The proposed content adaptation techniques are based on scalable video coding. The content adaptation based on user preferences, profiles for usage, terminal and network capabilities are discussed. Initial experimental results have been proved to be effective and productive for a virtual office environment.

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Section: A Content Adaptationmentioning

confidence: 99%

Content Adaptation for Virtual Office Environment Using Scalable Video Coding

Hewage

Arachchi

Masterton

et al. 2007

2007 16th IST Mobile and Wireless Communications Summit

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“…Network-based adaptation mechanisms can be employed at the edges or other strategic locations of different networks, using a fixed-location video adaptation gateway, node, or proxy as in conventional networking strategies [9][10][11]. Alternatively, video adaptation (i.e., transcoding) can be performed dynamically where and whenever needed using active networking technologies [12,13].…”

Section: Introductionmentioning

confidence: 99%

Transcoding-Based Error-Resilient Video Adaptation for 3G Wireless Networks

Eminsoy

Dogan

Kondoz

2007

EURASIP J. Adv. Signal Process.

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Transcoding is an effective method to provide video adaptation for heterogeneous internetwork video access and communication environments, which require the tailoring (i.e., repurposing) of coded video properties to channel conditions, terminal capabilities, and user preferences. This paper presents a video transcoding system that is capable of applying a suite of error resilience tools on the input compressed video streams while controlling the output rates to provide robust communications over error-prone and bandwidth-limited 3G wireless networks. The transcoder is also designed to employ a new adaptive intra-refresh algorithm, which is responsive to the detected scene activity inherently embedded into the video content and the reported time-varying channel error conditions of the wireless network. Comprehensive computer simulations demonstrate significant improvements in the received video quality performances using the new transcoding architecture without an extra computational cost.

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“…Most data streaming formats contain periodic zero-state resynchronization points for increased error resilience, effectively segmenting the stream into independent blocks which we call media units [14]. For instance, in an MPEG-1/2 stream, a media unit can be a group of pictures(GOP) that can be decoded independently.…”

Section: Qos Metrics For Streaming Applicationsmentioning

confidence: 99%