RETAVIC: using meta-data for real-time video encoding in multimedia servers

Authors:
Maciej Suchomski;Michael Militzer;Klaus Meyer-Wegener
Affiliations:
University of Erlangen-Nuremberg, Erlangen, Germany;University of Erlangen-Nuremberg, Erlangen, Germany;University of Erlangen-Nuremberg, Erlangen, Germany
Venue:
NOSSDAV '05 Proceedings of the international workshop on Network and operating systems support for digital audio and video
Year:
2005

Citing 3
Cited 1

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Abstract

In a situation where many different output formats tailored to certain environments must be generated upon request from a single generic storage format of a video object, transformations in real-time must be available. The paper introduces the building blocks of a system that can provide such transformations. A non-real-time preparation phase produces a layered lossless format and also does content analysis. Meta-data extracted here are later used to control and sim-plify the transcoding process performed in real-time. The worst-case-to-average ratio is reduced significantly, allowing for better scheduling, reduced buffer sizes, and higher admission rates. The paper describes the details of this approach and provides an evaluation.