NDLI: A new approach to low bit rate audio coding using a combined harmonic-multiband-wavelet representation

Content Provider	IEEE Xplore Digital Library
Author	Deriche, M. Ning, D. Boland, S.
Copyright Year	1999
Description	Author affiliation: Signal Process. Res. Centre, Queensland Univ. of Technol., Brisbane, Qld., Australia (Deriche, M.)
Abstract	In this paper, we present updated results for the combined harmonic-wavelet based audio coder. This coder first approximates the audio frame as a sum of several sinusoids using a harmonic analysis-synthesis scheme. The reconstructed harmonic signal is then subtracted from the original to give a residual, which is analysed using a wavelet filtering scheme. After each step (harmonic analysis and wavelet filtering), the perceptually relevant parameters are quantised and encoded. The total least squares (TLS)-Prony algorithm is used for the harmonic analysis scheme, and cascaded M-band wavelet transforms are used for analysing the residual. At encoding bit rates of 60-70 kbit/s, this audio coder is capable of delivering better results than the MPEG layer II audio coder operating at the much higher bit rate of 128 kbit/s.
Starting Page	603
Ending Page	606
File Size	377647
Page Count	4
File Format	PDF
ISBN	1864354518
DOI	10.1109/ISSPA.1999.815745
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-08-22
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit rate Audio coding Harmonic analysis Wavelet analysis Power harmonic filters Filtering Least squares approximation Signal analysis Least squares methods Wavelet transforms
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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