863,128 research outputs found

    Military applications of automatic speech recognition and future requirements

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    An updated summary of the state-of-the-art of automatic speech recognition and its relevance to military applications is provided. A number of potential systems for military applications are under development. These include: (1) digital narrowband communication systems; (2) automatic speech verification; (3) on-line cartographic processing unit; (4) word recognition for militarized tactical data system; and (5) voice recognition and synthesis for aircraft cockpit

    Speech as a pilot input medium

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    The speech recognition system under development is a trainable pattern classifier based on a maximum-likelihood technique. An adjustable uncertainty threshold allows the rejection of borderline cases for which the probability of misclassification is high. The syntax of the command language spoken may be used as an aid to recognition, and the system adapts to changes in pronunciation if feedback from the user is available. Words must be separated by .25 second gaps. The system runs in real time on a mini-computer (PDP 11/10) and was tested on 120,000 speech samples from 10- and 100-word vocabularies. The results of these tests were 99.9% correct recognition for a vocabulary consisting of the ten digits, and 99.6% recognition for a 100-word vocabulary of flight commands, with a 5% rejection rate in each case. With no rejection, the recognition accuracies for the same vocabularies were 99.5% and 98.6% respectively

    Enhancing the Early Literacy Development of Children at Risk for Reading Difficulties

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    This paper reviews the dynamic and interactive links between the development of children’s language phonological awareness, and reading. Some of the key issues explored are procedures to enhance children’s language development, decoding and word recognition skills, along with some relevant assessment and programming strategies that can facilitate children’s early reading development. In particular, the paper supports the suggestion that deficits in phonological awareness are often a consequence of slow vocabulary development (a classic marker of language delay) and that teachers need to be able to adapt their language and dialogue interactions for children with language delays

    Phonology is Fundamental in Skilled Reading

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    There is controversy about the importance of phonology in skilled reading. Event-related potential (ERP) evidence from the initial moments of visual word recognition indicates that processing sub-lexical phonology is fundamental to skilled reading. The early timecourse of this phonological activation explains the predictive power of phonological awareness for early reading development, affirms the importance of phonological processing in learning to read, and illuminates the persistent challenges of dyslexia

    Integrating user-centred design in the development of a silent speech interface based on permanent magnetic articulography

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    Abstract: A new wearable silent speech interface (SSI) based on Permanent Magnetic Articulography (PMA) was developed with the involvement of end users in the design process. Hence, desirable features such as appearance, port-ability, ease of use and light weight were integrated into the prototype. The aim of this paper is to address the challenges faced and the design considerations addressed during the development. Evaluation on both hardware and speech recognition performances are presented here. The new prototype shows a com-parable performance with its predecessor in terms of speech recognition accuracy (i.e. ~95% of word accuracy and ~75% of sequence accuracy), but significantly improved appearance, portability and hardware features in terms of min-iaturization and cost

    Spoken word recognition in adolescents with autism spectrum disorders and specific language impairment

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    Spoken word recognition, during gating, appears intact in specific language impairment (SLI). This study used gating to investigate the process in adolescents with autism spectrum disorders plus language impairment (ALI). Adolescents with ALI, SLI, and typical language development (TLD), matched on nonverbal IQ listened to gated words that varied in frequency (low/high) and number of phonological onset neighbors (low/high density). Adolescents with ALI required more speech input to initially identify low-frequency words with low competitor density than those with SLI and those with TLD, who did not differ. These differences may be due to less well specified word form representations in ALI
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