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, Rita; Grana, Costantino; A., Prati. - STAMPA. - (2002), pp. 223-226. ((Intervento presentato al convegno Tenth ACM international conference on Multimedia tenutosi a Juan-les-Pins, France nel Dec 1-6.

Semantic Transcoding for Live Video Server

CUCCHIARA, Rita;GRANA, Costantino;
2002-01-01

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.
Tenth ACM international conference on Multimedia
Juan-les-Pins, France
Dec 1-6
223
226
Cucchiara, Rita; Grana, Costantino; A., Prati
Semantic Transcoding for Live Video Server / Cucchiara, Rita; Grana, Costantino; A., Prati. - STAMPA. - (2002), pp. 223-226. ((Intervento presentato al convegno Tenth ACM international conference on Multimedia tenutosi a Juan-les-Pins, France nel Dec 1-6.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/308200
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