In this paper we present transcoding techniques for a video server architecture that enables the user to access live video streams by using different devices with different capabilities. For live videos, annotation methods cannot be exploited. Instead we propose methods of on-the-fly transcoding that adapt the video content with respect to the user resources and the video semantic. Thus we propose an object-based transcoding with "classes of relevance"(for instance People, Face and Background). To compare the different strategies we propose a metric based on the Weighted Mean Square Error that allows the analysis of different application scenarios by means of a class-wise distortion measure. The obtained results show that the use of semantic can improve the bandwidth to distortion ratio significantly.

Semantic transcoding for live video server / Cucchiara, R.; Grana, C.; Prati, A.. - (2002), pp. 223-226. ((Intervento presentato al convegno 10th ACM International Conference on Multimedia, MULTIMEDIA 2002 tenutosi a fra nel 2002 [10.1145/641007.641050].

Semantic transcoding for live video server

Cucchiara R.;Grana C.;
2002

Abstract

In this paper we present transcoding techniques for a video server architecture that enables the user to access live video streams by using different devices with different capabilities. For live videos, annotation methods cannot be exploited. Instead we propose methods of on-the-fly transcoding that adapt the video content with respect to the user resources and the video semantic. Thus we propose an object-based transcoding with "classes of relevance"(for instance People, Face and Background). To compare the different strategies we propose a metric based on the Weighted Mean Square Error that allows the analysis of different application scenarios by means of a class-wise distortion measure. The obtained results show that the use of semantic can improve the bandwidth to distortion ratio significantly.
10th ACM International Conference on Multimedia, MULTIMEDIA 2002
fra
2002
223
226
Cucchiara, R.; Grana, C.; Prati, A.
Semantic transcoding for live video server / Cucchiara, R.; Grana, C.; Prati, A.. - (2002), pp. 223-226. ((Intervento presentato al convegno 10th ACM International Conference on Multimedia, MULTIMEDIA 2002 tenutosi a fra nel 2002 [10.1145/641007.641050].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1286788
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