Searched for: contributor:"Lagendijk, R.L. (promotor)"
(1 - 20 of 26)

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Zeng, Y. (author)
In digital speech communication applications like hands-free mobile telephony, hearing aids and human-to-computer communication systems, the recorded speech signals are typically corrupted by background noise. As a result, their quality and intelligibility can get severely degraded. Traditional noise reduction approaches process signals recorded...
doctoral thesis 2015
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Martínez Castañeda, J.A. (author)
The "telephone'' model has been, for the last one hundred thirty years, the base of modern telecommunications with virtually no changes in its fundamental concept. The arise of smaller and more powerful computing devices have opened new possibilities. For example, to build systems able to give to the user the illusion of being talking to the...
doctoral thesis 2013
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Yang, L. (author)
doctoral thesis 2013
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Shi, Y. (author)
In this thesis we report the results of our research on recommender systems, which addresses some of the critical scientific challenges that still remain open in this domain. Collaborative filtering (CF) is the most common technique of predicting the interests of a user by collecting preference information from many users. In order to determine...
doctoral thesis 2013
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Rudinac, S. (author)
To facilitate finding of relevant information in ever-growing multimedia collections, a number of multimedia information retrieval solutions have been proposed over the past years. The essential element of any such solution is the relevance criterion deployed to select or rank the items from a multimedia collection to be presented to the user....
doctoral thesis 2013
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Taal, C.H. (author)
In digital speech-communication systems like mobile phones, public address systems and hearing aids, conveying the message is one of the most important goals. This can be challenging since the intelligibility of the speech may be harmed at various stages before, during and after the transmission process from sender to receiver. Causes which...
doctoral thesis 2013
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Gedrojc, B. (author)
The objective of this thesis is to preserve privacy for the user while untrustworthy proxies are involved in the communication and computation i.e. private computing. A basic example of private computing is an access control system (proxy) which grants access (or not) to users based on fingerprints. For privacy reasons the user does not want to...
doctoral thesis 2011
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Doets, P.J.O. (author)
An audio fingerprint is a compact low-level representation of a multimedia signal. An audio fingerprint can be used to identify audio files or fragments in a reliable way. The use of audio fingerprints for identification consists of two phases. In the enrollment phase known content is fingerprinted, and ingested into a database, together with...
doctoral thesis 2010
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Borchert, S. (author)
The main focus of video encoding in the past twenty years has been on video broadcasting. A video is captured and encoded by professional equipment and then watched on varying consumer devices. Consequently, the focus was to increase the quality and to keep down the decoder complexity. In more recent years we observe a shift in user behavior,...
doctoral thesis 2010
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Erkin, Z. (author)
Recent advances in technology provided a suitable environment for the people in which they can benefit from online services in their daily lives. Despite several advantages, online services also constitute serious privacy risks for their users as the main input to algorithms are privacy sensitive such as demographic information, shopping...
doctoral thesis 2010
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Lu, L. (author)
In this thesis, we developed and assessed a novel robust and unsupervised framework for semantic inference from composite audio signals. We focused on the problem of detecting audio scenes and grouping them into meaningful clusters. Our approach addressed all major steps in a general process of composite audio analysis, from low-level signal...
doctoral thesis 2009
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Taal, J.R. (author)
doctoral thesis 2007
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Østergaard, J. (author)
In this thesis we construct and analyze index-assignment based multiple-description coding schemes.
doctoral thesis 2007
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Den Hollander, R.J.M. (author)
This thesis treats efficient estimation algorithms for the epipolar geometry, the model underlying two views of the same scene or object. The epipolar geometry is computed from image correspondences that are found by local feature matching. These correspondences are used to calculate the fundamental matrix, which is the mathematical...
doctoral thesis 2007
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Shterev, I. (author)
doctoral thesis 2007
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Niamut, O.A. (author)
Abstract not available
doctoral thesis 2006
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Persa, S.F. (author)
The focus of this thesis is on studying diverse techniques, methods and sensors for position and orientation determination with application to augmented reality applications. In Chapter 2 we reviewed a variety of existing techniques and systems for position determination. From a practical point of view, we discussed the need for a mobile system...
doctoral thesis 2006
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Haratcherev, I.J. (author)
The thesis addresses the ever-persistent problem of quality guarantees in wireless data networks. The quality guarantees are especially important for real-time streaming applications. While in fixed links most of the quality issues could be, and are still resolved by over-provisioning, in the world of wireless communications things get...
doctoral thesis 2006
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Cartrysse, K. (author)
This thesis' objective is to provide privacy to mobile code. A practical example of mobile code is a mobile software agent that performs a task on behalf of its user. The agent travels over the network and is executed at different locations of which beforehand it is not known whether or not these can be trusted. Because a mobile software agent...
doctoral thesis 2005
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van Dijk, H.W. (author)
doctoral thesis 2004
Searched for: contributor:"Lagendijk, R.L. (promotor)"
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