An Enhanced Prediction-based Forward Error Correction Scheme
| Autor: | Huai-WenZhang, 張懷文 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 Real-time video streaming applications typically require minimizing packet loss and transmission delay so as to achieve the best possible playback quality. Forward error correction (FEC) is a frequently used technique for improving transport performance with low delay overhead on lossy packet networks. However, the FEC processing latencies induced by enhancing or optimizing the loss recovery capability for video streaming may violate the stringent delay constraint in video communications. In related work, a prediction-based FEC scheme attempts to minimize the additional FEC processing delay while maintaining high video quality. However, the performance of prediction-based FEC depends on prediction accuracy. Furthermore, the problems caused by prediction errors such as inaccurate FEC redundancy and bandwidth allocation overflow will reduce the video quality. Therefore, this paper extends the previous prediction-based FEC scheme with a time-domain prediction algorithm and a series of correction algorithm to upgrade the video quality. The simulation results show that our proposed scheme improves not only the prediction accuracy and the playable frame rate, but also lowers the redundancy overhead. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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