Smart PIN: Utility-based replication and delivery of multimedia content to mobile users in wireless networks

Lee, Seung Bum; Muntean, Gabriel‐Miro; Smeaton, Alan F.

doi:10.1109/isbmsb.2008.4536630

Cited by 3 publications

(3 citation statements)

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“…A. Smart PIN Smart PIN [26], [27] is a performance and cost-oriented context-aware personal information network which focuses on efficient user access to information located on remotely distributed devices in a heterogeneous network environment. In order to address both information overload, and the heterogeneity of devices and network connectivity, Smart PIN supports a utility function-based data replication scheme as presented in Fig.…”

Section: Performance-aware Multimedia Content Sharing and Replicmentioning

confidence: 99%

“…Smart PIN calculates the transfer duration with the target bandwidth consumption and schedules data replication accordingly. A more detailed description of this algorithm can be found in [26], [27].…”

Section: Multimedia Data Replication Schemementioning

confidence: 99%

“…The proposed Multimedia Data Replication Scheme (MDRS) is based on the Smart PIN data replication algorithm described above with multimedia data set availability G k enhancement [26]. To achieve the target minimum data set, each node checks its storage and DHT sequentially.…”

Section: B Data Replication Models and Scenariosmentioning

confidence: 99%

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Performance-Aware Replication of Distributed Pre-Recorded IPTV Content

Lee

Muntean

Smeaton

2009

IEEE Trans. on Broadcast.

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Video recording in IPTV systems is a promising service that provides time-shifted services in relation to storing TV content closer to user devices such as set-top boxes. Existing approaches do not support collaboration between nodes which have correlated contents, a fact that can affect the performance of the overall system. To make this service more interactive and proactive, this paper presents the architecture using the Smart Personal Information Network (Smart PIN) as a novel performance-based content sharing network for IPTV content which uses a user-centric utility-based Multimedia Data Replication Scheme (MDRS). This allows the exchange of data based on both network performance and user interest in exchanged multimedia content in order to achieve efficient content sharing. The proposed solution is evaluated through extensive simulations and results show much improved behaviour in comparison with two other existing general purpose data replication schemes.

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Section: Performance-aware Multimedia Content Sharing and Replicmentioning

confidence: 99%

Section: Multimedia Data Replication Schemementioning

confidence: 99%

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Performance-Aware Replication of Distributed Pre-Recorded IPTV Content

Lee

Muntean

Smeaton

2009

IEEE Trans. on Broadcast.

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Fast H.264/SVC inter-frame and inter-layer mode decisions based on motion activity

Martin

2012

Electron. Lett.

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In the SVC extension of H.264, motion compensation of the enhancement layer is performed in both the same resolution layer and the corresponding lower layer, which results in greatly increased computational complexity. A fast inter-frame and inter-layer mode selection algorithm utilising the motion activity in the key frames of the video sequence is proposed. Statistics obtained empirically reveal that a macroblock with slow movement is more likely to be best matched by one in the same resolution layer. However, for a macroblock with fast movement, motion estimation between layers is required. This a priori knowledge forms the basis for the mode selection method proposed. Simulation results show that the algorithm can reduce the encoding time by up to 40%, with negligible degradation in rate distortion.Introduction: The Joint Video Team of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC MPEG has standardised a scalable video coding (SVC) extension of the H.264/AVC standard. SVC allows a partial bit-stream to be transmitted and decoded with lower temporal or spatial resolution or reduced quality, depending on device capabilities, network quality and user demand [1].For spatial scalability, the encoder performs base layer coding on a low resolution version of the video sequence using the standard H.264/AVC encoder, and enhancement layer coding on a higher resolution version of the sequence. SVC introduces many new features to improve the coding efficiency and robustness, including inter-layer prediction between base layer and enhancement layers. However, these features result in greatly increased computational complexity. The cost of mode selection is much higher than in H.264/AVC. Some fast mode selection methods for SVC have been proposed [2, 3]. They either speed up the encoding process for single layer coding or may result in rate distortion (RD) degradation if the motion patterns between layers are not similar. In [1], the authors point out that, even if the reconstructed lower layer is essentially lossless, the data may not be optimum for inter-layer prediction. For some video sequences with slow motion and high picture detail, temporal prediction generally achieves a better approximation than the up-sampled lower layer reconstruction. In this Letter, we propose an inter-layer and inter-frame mode selection algorithm using key frame information. Simulation results show that the algorithm can reduce coding time by up to 40% with insignificant bit rate increase or PSNR degradation.

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