Gerhard Sagerer

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The idea of using articulatory representations for automatic speech recognition (ASR) continues to attract much attention in the speech community. Representations which are grouped under the label ‘‘articulatory’’ include articulatory parameters derived by means of acoustic-articulatory transformations (inverse filtering), direct physical measurements or(More)
Aktract-This paper gives a detailed account of a system environment for the treatment of general problems of image and speech understanding. It provides a framework for the representation of declarative and procedural knowledge based on a suitable definition of a semantic network. The syntax and semantics of the network are clearly defined. In addition, the(More)
In order to enable the widespread use of robots in home and office environments, systems with natural interaction capabilities have to be developed. A prerequisite for natural interaction is the robot's ability to automatically recognize when and how long a person's attention is directed towards it for communication. As in open environments several persons(More)
BACKGROUND When our PC goes on strike again we tend to curse it as if it were a human being. Why and under which circumstances do we attribute human-like properties to machines? Although humans increasingly interact directly with machines it remains unclear whether humans implicitly attribute intentions to them and, if so, whether such interactions resemble(More)
Absfract-This article presents the speech understanding and dialog system EVAR. All levels of linguistic knowledge are used both to control the analysis process and for the interpretation of an utterance. All kinds of knowledge are integrated in a homogeneous knowledge base. The control algorithm used for the analysis is defined within the representation(More)
Suffix trees have been established as one of the most versatile index structures for unstructured string data like genomic sequences and other strings. In this work, our goal is the development of algorithms for the efficient construction of suffix trees for very large strings and their convenient storage regarding fast access when main memory is limited.(More)
Most published work in the field of pattern analysis, in our opinion, underestimates the importance of system architecture or system development. When building large distributed systems both become a prerequisite in order to achieve the overall goal — a complex system solving a demanding task. In our paper we present the approach we have taken and the first(More)
We present a means of generating and understanding relative spatial positions in a natural three-dimensional scene, in terms of six spatial prepositions, left, right, in-front, behind, above, and below, using real stereo images. Our model has two layers. First, a symbolic spatial description of the scene independent of reference frames is computed. Then, in(More)