NDLI: Bit stream based wireless speech recognition using mixed excitation linear prediction (MELP) vocoder

Content Provider	IEEE Xplore Digital Library
Author	Tugac, S. Ilk, H.G.
Copyright Year	2004
Description	Author affiliation: Ankara Univ., Turkey (Tugac, S.; Ilk, H.G.)
Abstract	Wireless speech recognition techniques have been the focal point of considerable research activity in the last decade. Most of the previous research activity assumes that the communication channel is only large enough to transmit either speech coding or speech recognition parameters. A bit-stream based front-end for a wireless speech recognition system that operates on a mixed excitation linear prediction (MELP) vocoder is presented. Speaker dependent, isolated word recognition accuracies obtained from conventional and bit-stream based front-end systems are obtained and their statistical significance is discussed. The recognition accuracies prove that the bit-stream based front end gives comparable performance to that obtained with the original input speech and is superior to the recognizer obtained from low bit rate decoded speech. The proposed system's performance in wireless channel conditions is also evaluated, via simulations, in order to observe adverse channel effects; these simulation results prove that the bitstream based front-end is useful for wireless systems.
Sponsorship	IEEE Tubitak Istanbul Teknik Universitesi Aselsan Profilo Telra TURCom SGI Datacore Divit
Starting Page	414
Ending Page	417
File Size	232607
Page Count	4
File Format	PDF
ISBN	0780383184
DOI	10.1109/SIU.2004.1338551
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-04-30
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Speech coding Cepstral analysis Vocoders System performance Bit rate Speech recognition Communication channels Decoding Marine vehicles Testing
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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