Title: The adaptive layer-based scheduling system for embedded real-time transmission on scalable multimedia stream

Authors: Chia-Ying Tseng

Addresses: Department of Computer Science and Engineering,Tatung University, 40 Chungshan N. Rd., Sec. 3, Taipei, Taiwan

Abstract: With the recent development in compression and network technology, stream media has been adopted in internet and intranet. Application of stream media technology will play a key role in future development of fast networks. Original video/audio data will be stored in the devices for storage after having been pre-compressed by a video/audio compression algorithm. When clients have requirements, the stream server retrieves the video/audio data from the storage devices through the network. This paper discusses a simple and effective real-time scheduling algorithm, adaptive Layer-Based Least-Laxity-First (LB-LLF) scheduling algorithm, to improve the output quality of video/audio on a network and to achieve synchronised playback effect. The proposed algorithm considered real-time constraint, unequal priorities of scalable media stream in different layers, and a good tradeoff between coding efficiency and drifting error. This guarantees the effective usage of available channel bandwidth and the better quality of playback in client.

Keywords: real-time scheduling; embedded systems; streaming media; video processing; layer-based scheduling; multimedia; internet; intranets; channel bandwidth availability; playback quality; coding efficiency; drifting error; real-time constraints.

DOI: 10.1504/IJES.2006.014857

International Journal of Embedded Systems, 2006 Vol.2 No.3/4, pp.222 - 227

Published online: 12 Aug 2007 *

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