Since 1990 the DRA Speech Research Unit has conducted research into applications of speech recognition technology to speech and language development for young children. this has been done in collaboration with Herefor...
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ISBN:
(纸本)0780335554
Since 1990 the DRA Speech Research Unit has conducted research into applications of speech recognition technology to speech and language development for young children. this has been done in collaboration with Hereford and Worcester County Council Education Department (HWCC) and, more recently, with Sherston Software Limited, one of the UK's leading independent educational software publishers. An initial project, known as STAR (Speech Training Aid Research), was prompted by HWCC's awareness of a requirement by teachers for a computerised 'Speech Training Aid' tool to aid young children in the development of a range of communications and language skills. the goal was to develop a computer-based system which was able to distinguish between 'good' and 'poor' pronunciations of a word, spoken by a child in response to a textual, pictorial or verbal prompt, from a 1,000 word children's vocabulary. the same speech recognition technology has subsequently been integrated into Sherston Software's commercially successful range of animated 'Talking Books', which use stored digitised speech to enable the computer to read words out-loud to a child. this converts them into 'Talking & Listening Books' which, in addition to the existing functions, are able to 'listen' to a child reading and indicate words which have been read incorrectly.
Wavelet packet division multiplexing (WPDM) is a multiplexing scheme in which the message signals are coded onto wavelet packet basis functions for transmission. A feature of WPDM is that the coding waveforms overlap ...
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ISBN:
(纸本)0819422134
Wavelet packet division multiplexing (WPDM) is a multiplexing scheme in which the message signals are coded onto wavelet packet basis functions for transmission. A feature of WPDM is that the coding waveforms overlap in time and frequency, which can provide greater capacity and greater immunity to certain channel imperfections that time division and frequency division multiplexing. By analogy with frequency-hopped communication schemes, the WPDM scheme can be further enhanced by providing a framework for hopping the transmission parameters of the scheme in a pattern which is known by the receiver. In this paper, we exploit the underlying filter back structure of WPDM and the recent development of time-varying filter banks for signal analysis to provide a framework for slow wavelet packet hopping which does not compromise the data rate.
Spoken language interfaces can provide natural communication for many database retrieval tasks. the CMU ATIS system provides an example of accessing airline information using spoken natural language queries. However, ...
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ISBN:
(纸本)0780335554
Spoken language interfaces can provide natural communication for many database retrieval tasks. the CMU ATIS system provides an example of accessing airline information using spoken natural language queries. However, a lot of training data is needed to develop a spoken language application. For example, we need training data to generate a language model that can be used by the recognizer to reduce the search space. In this paper, we will address some issues arising from small amount of training data available for a new spoken language application. We are working on a spoken language interface to access information from a library catalogue. the catalogue contains around 13,000 titles, 6000 authors and 19000 subjects. there an mon than 20,000 words in the dictionary. the user can seek information about books, authors, subjects, publishers, etc. For example, ''I'd like to see books dealing with science fiction by Clarke.'' We will describe some language modelling experiments for this task. We will briefly describe a speech interface [5] for a library catalogue. We will also review class-based language models and describe their limitations. Finally, we will present our approach to building statistical language models for new spoken language applications. this is important because a lot of training data is normally needed to generate a language model. However, it is not practical to have or collect a large corpus of data for each new spoken language application.
We investigate relations between halftoning and the binary image algebra which includes set and morphological operations. We show that halftoning has important commutative properties with respect to unions, intersecti...
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this paper presents a generalised technique for parallelising embedded computer vision and patternrecognitionapplications and shows how it has been applied to the recognition of handwritten postcodes on envelopes. T...
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Robotic applications impose hard real-time demands on their vision components. To accommodate the realtime constraints, the visual component of robotic systems are often simplified by narrowing the scope of the vision...
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this paper addresses the problem of dynamic optical processing for the control of phased array antennas. the significant result presented is the demonstration of a continuously variable photonic RF/microwave delay lin...
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ISBN:
(纸本)0819414506
this paper addresses the problem of dynamic optical processing for the control of phased array antennas. the significant result presented is the demonstration of a continuously variable photonic RF/microwave delay line. Specifically, it is shown that by applying spatial frequency dependent optical phase compensation in an optical heterodyne process, variable RF delay can be achieved over a prescribed frequency band. Experimental results which demonstrate the performance of the delay line with regard to both maximum delay and resolution over a broad bandwidth are presented. Additionally, a spatially integrated optical system is proposed for control of phased array antennas. the integrated system provides mechanical stability, essentially eliminates the drift problems associated with free space optical systems, and can provide high packing density. this approach uses a class of spatial light modulator known as a deformable mirror device and leads to a steerable arbitrary antenna radiation pattern of the true time delay type. Also considered is the ability to utilize the delay line as a general photonic signalprocessing element in an adaptive (reconfigurable) transversal frequency filter configuration. Such systems are widely applicable in jammer/noise canceling systems, broadband ISDN, spread spectrum secure communications and the like.
this publication contains 249 conference papers. the following topics are dealt with: protocol and applications and packet switching;TDX-10 digital switching system technology;artificial intelligence and expert system...
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this publication contains 249 conference papers. the following topics are dealt with: protocol and applications and packet switching;TDX-10 digital switching system technology;artificial intelligence and expert systems;image processing;computer architecture;software for parallel processing;token passing LAN and applications;optimization and neural networks;digital modulation and modems;functional programming languages;architectures for parallel processing;application and implementation of Petri net concepts;signalprocessing and filters;array spectral analysis;advanced communication networks;TROPICO digital switching system;high performance computing theory and applications;patternrecognition;fault tolerant computing;instrumentation and process control;data communication networks;speech analysis and recognition;computer hardware systems;robotics and automation;mobile radio;theoretical computer science and algorithms;distributed processing;LAN/WAN networking;applied expert systems;coding;C-DOT digital switching system;power delivery systems;rural communication;radar;parallel execution of functional programs;VLSI, ASICS and devices;transmission media and communication systems;office automation and databases;program transformation, synthesis and analysis;and power electronics.
the development of an image processing scheme for the analysis of cleavage cracks in minerals is described. the scheme is designed for use on digitised rock thin section micrographs. the cracks in a crystal image are ...
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the 12thinternationalconference on Human-Computer Interaction, HCI Inter- tional 2007, was held in Beijing, P.R. China, 22-27 July 2007, jointly withthe Symposium on Human Interface (Japan) 2007, the 7th Internatio...
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ISBN:
(数字)9783540733218
ISBN:
(纸本)9783540733188
the 12thinternationalconference on Human-Computer Interaction, HCI Inter- tional 2007, was held in Beijing, P.R. China, 22-27 July 2007, jointly withthe Symposium on Human Interface (Japan) 2007, the 7thinternationalconference on Engineering Psychology and Cognitive Ergonomics, the 4thinternationalconference on Universal Access in Human-Computer Interaction, the 2nd international Conf- ence on Virtual Reality, the 2nd internationalconference on Usability and Inter- tionalization, the 2nd internationalconference on Online Communities and Social Computing, the 3rd internationalconference on Augmented Cognition, and the 1st internationalconference on Digital Human Modeling. A total of 3403 individuals from academia, research institutes, industry and g- ernmental agencies from 76 countries submitted contributions, and 1681 papers, judged to be of high scientific quality, were included in the program. these papers address the latest research and development efforts and highlightthe human aspects of design and use of computing systems. the papers accepted for presentation th- oughly cover the entire field of Human-Computer Interaction, addressing major - vances in knowledge and effective use of computers in a variety of application areas. this volume, edited by Vincent G. Duffy, contains papers in the thematic area of Digital Human Modeling, addressing the following major topics: • Shape and Movement Modeling and Anthropometry • Building and Applying Virtual Humans • Medical and Rehabilitation applications • Industrial and Ergonomic applications
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