Video Streaming |
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Adaptive progressive download based on the MPEG-4 file format |
Färber Nikolaus, Döhla Stefan, Issing Jochen |
Multimedia Transport, Dept. Audio, Fraunhofer Institute for Integrated Circuits IIS, Erlangen 91058, Germany |
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Abstract In this paper we describe how progressive download and adaptive streaming can be combined into a simple and efficient streaming framework. Based on the MPEG-4 file format (MP4) we use HTTP for transport and argue that these two components are sufficient for specifying an open streaming architecture. The client selects appropriate chunks from the MP4 file to be transferred based on (1) the header information (i.e. the “moov” box) in the first part of the file and (2) his observation of network throughput. The framework is completely client driven which allows for better server scalability and reduces signalling overhead. We discuss architecture and implementation issues such as complexity, interoperability and scalability and compare to 3GPP PSS Rel-6 adaptive streaming when appropriate. Measurements from a simple MP4/HTTP streaming client are presented showing that appropriate chunks are selected such that increased reliability is achieved.
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Received: 09 December 2005
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