Geert Depovere

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This paper presents a video watermarking technology for broadcast monitoring. The technology has been developed at the Philips Research Laboratories in Eindhoven in the context of the European ESPRIT project VIVA (Visual Identity Veri cation Auditor). The aim of the VIVA project is to investigate and demonstrate a professional broadcast surveillance system.(More)
A digital watermark is a perceptually unobtrwive signal embedded in some multimedia asset carrying additional information: e.g. copyright information of a video clip. For nearly all watermarking schemes published so far, detection is based on some form of comlation. I n this paper, we show that the detection diability can be significantly improved by(More)
Theoretical modeling of watermarks allow prediction of the detector reliability and facilitates the development of more reliable systems. In particular, mathematical evaluation is relevant to estimate the rate at which \false alarms" occur. In this paper, the probability of incorrect detection (missed detection or false alarm) is expressed in terms of the(More)
A watermark is a perceptually unobstructive mark embedded in an image, audio or video clip or other multimedia asset. A watermark can carry additional information, for instance about the source and copyright status of a document or its intended recipient, its rights and restrictions. We analyse the reliability of detecting such watermarks, modeling it as a(More)
In this paper we consider a digital watermarking application where multiple parties can embed additional information using their watermark embedder. These parties are not supposed to influence each other and each watermark detector needs to be able to decode the information embedded by any of the embedder systems. One approach would be to use a single(More)