By Hisashi Wakita (auth.), Jean-Paul Haton (eds.)

ISBN-10: 9400978790

ISBN-13: 9789400978799

ISBN-10: 9400978812

ISBN-13: 9789400978812

This publication is the results of the second one NATO complicated examine Institute on speech processing held on the Chateau de Bonas, France, from June twenty ninth to July tenth, 1981. This Institute supplied a high-level assurance of the fields of speech transmission, acceptance and figuring out, which represent vital components the place examine job has re­ cently been linked to genuine commercial advancements. This ebook will consequently comprise either basic and utilized issues. Ten survey papers by way of the very best experts within the box are incorporated. they provide an up to date presentation of numerous very important difficulties in computerized speech processing. to that end the e-book will be regarded as a reference handbook on a few vital components of computerized speech processing. The surveys are indicated by means of 'a * within the desk of contents. This ebook additionally includes study papers comparable to unique works, that have been offered throughout the panel classes of the Institute. For the sake of readability the e-book has been divided into 5 sections : 1. Speech research and Transmission: An emphasis has been laid at the ideas of linear prediction (LPC), and the issues desirous about the transmission of speech at a variety of bit charges are addressed in info. 2. Acoustics and Phonetics : One'of the most important bottleneck within the improvement of speech recogni­ tion structures continues to be the transcription of the continual speech wave into a few discrete strings or lattices of phonetic symbols. survey papers speak about this challenge from diverse issues of view and several other useful platforms also are described.

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Additional info for Automatic Speech Analysis and Recognition: Proceedings of the NATO Advanced Study Institute held at Bonas, France, June 29–July 10, 1981

Sample text

Schwartz, and D. Klatt, "A Feasibility Study of a Very Low Rate Speech Compression System," Report No. 3508 (NTIS NO. AD A044400). , Cambridge, MA, Feb. 1977. 27. R. Schwartz, J. Klovstad, J. Makhoul, D. Klatt and V. Wl!.. ACQiOtics, Speech ~ Si2nal Processing, Washington, DC, April 1979, pp. 891-894. 28. R. Schwartz, J. Klovstad, J. Makhoul, and J. Wl!.. Acoustics, Speech ~ Signal Processing, Denver, CO, April 1980, pp. 32-35. 48 29. Y. R. YISWANATHAN ET AL. M. Berouti and J. 9llil Int . &nf. Acoustics, Speech, ~ Signal Processing, Denver, CO, April 1980, pp.

Clearly, the spectral folding method is quite simple to perform. It produces generally good speech quality. However, the output speech contains "tonal noises" that increase with L and pitch of the speaker (11, 13). Recently, several HFR methods were proposed to overcome the problems of the simple spectral folding method (10,15). The best of these methods is described below. Perturbed Spectral Folding. Simple spectral folding exhibits a spectral regularity (as may be seen in Fig. 5(b», which may be responsible for some of the tonal noises.

For this method, the noise-shaping filter B(z) is chosen as the special pole-zero filter A(z/a)/A(z), where O

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Automatic Speech Analysis and Recognition: Proceedings of the NATO Advanced Study Institute held at Bonas, France, June 29–July 10, 1981 by Hisashi Wakita (auth.), Jean-Paul Haton (eds.)


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