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Computer Recognition of Continuous Speech

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A method of automatic speech recognition has been programmed on a small computer. The system accepts syntactic units of carefully spoken continuous speech from a single co-operative male speaker. The recognition parameters are low order cepstrum coefficients, zero crossing rate, slope change rate, cepstrum peak height and apparent place of articulation. The segmentation is performed using a “segmentation by recognition” method. Two phoneme choices are assigned to each segment. The utterance is identified by generating successive phoneme strings until one is found which satisfies the lexical and syntactic constraints. The lexical constraint requires the word string to consist only of phonemicon (phonemic dictionary) entries. The syntactic constraint requires the word string to satisfy a simplified English syntax. The phonemicon was built to contain about a thousand entries. Twenty utterances containing an average of 3.4 words were used to evaluate the system. Of these, 35 percent were correctly recognized without application of the syntactic constraint. Imposition of the syntactic constraint improved the recognition rate to 65 percent.
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Document Type: Research Article

Publication date: May 1, 1976

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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