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Automated Interactive Video Playback for Studies of Animal Communication
Published on: February 9, 2011
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Data-Prefetching Scheme Based on Playback Delay and Positioning Satisfaction in Peer-To-Peer Video-On-Demand System.
Lei Wang1,2, Xiaorui Li3,4, Yaqiu Liu5,6
1National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China. wanglei@njupt.edu.cn.
Sensors (Basel, Switzerland)
|March 9, 2018
Summary
This study introduces a data-prefetching strategy (DSA) to reduce video playback delay in peer-to-peer video-on-demand systems. DSA enhances user quality of experience (QoE) by optimizing data prefetching during video cassette recorder operations.
Area of Science:
- Computer Science
- Network Engineering
- Multimedia Systems
Background:
- Peer-to-peer (P2P) video-on-demand (VoD) systems offer VCR functionality but suffer from playback delays impacting user quality of experience (QoE).
- Effective data-prefetching strategies are crucial for mitigating these delays and improving VoD service.
Purpose of the Study:
- To propose and evaluate a novel data-prefetching strategy (DSA) for P2P VoD systems.
- To enhance user QoE by minimizing playback delay and maximizing positioning satisfaction during VCR operations.
Main Methods:
- The proposed Data-prefetching Strategy (DSA) models anchor interval selection using multiple-attribute decision-making (MADM) theory.
- The Technique for Ordering Preference by Similarity to an Ideal Solution (TOPSIS) algorithm is employed to solve the MADM problem.
- Simulations are conducted to compare DSA with existing prefetching methods.
Main Results:
- DSA achieves significantly higher positioning satisfaction, approximately 60% greater than existing methods.
- DSA effectively minimizes playback delay following VCR operations, even with limited additional bandwidth.
- Performance of DSA improves with increased network bandwidth.
Conclusions:
- The proposed DSA strategy offers a superior approach to data prefetching in P2P VoD systems.
- DSA enhances user experience by reducing playback delays and improving VCR operation satisfaction.
- DSA provides an efficient method for optimizing prefetching in bandwidth-constrained environments.
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