Change search
ReferencesLink to record
Permanent link

Direct link
Entropy-constrained polar quantization and its application to audio coding
KTH, School of Electrical Engineering (EES), Sound and Image Processing.
2005 (English)In: IEEE transactions on speech and audio processing, ISSN 1063-6676, E-ISSN 1558-2353, Vol. 13, no 2, 220-232 p.Article in journal (Refereed) Published
Abstract [en]

In, this work, we present a new method for quantization of sinusoidal amplitudes and phases, and apply the method to sinusoldal coding of speech and audio signals. The method is based on unrestricted polar quantization, where phase quantization accuracy depends on amplitude. Amplitude and phase quantizers are derived under an entropy (average rate) constraint using high-rate assumptions. First, we derive optimal quantizers for one sinusoid and a mean-squared error distortion measure. We provide a detailed analysis of entropy-constrained unrestricted polar quantization, showing its high performance and practicality even at low rates. Second, we find optimal quantizers for a set of sinusoids that model a short segment of an audio signal. The optimization is performed using a, weighted error measure that can account for the masking effect in the human auditory system. We find the optimal rate distribution between, sinusoids, as well as the corresponding optimal amplitude and phase quantizers, based on the perceptual importance of sinusolds defined by masking. The new method is used in an audio-coding application and is shown to significantly outperform a conventional sinsoidal quantization method where phase quantization accuracy is identical for all sinusoids.

Place, publisher, year, edition, pages
2005. Vol. 13, no 2, 220-232 p.
Keyword [en]
audio coding, high-rate theory, quantization, sinusoidal coding, unrestricted polar quantization, sinusoidal representation, phase
URN: urn:nbn:se:kth:diva-14548DOI: 10.1109/tsa.2004.840942ISI: 000227171300008ScopusID: 2-s2.0-14644432311OAI: diva2:332589
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Kleijn, W. Bastiaan
By organisation
Sound and Image Processing
In the same journal
IEEE transactions on speech and audio processing

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 22 hits
ReferencesLink to record
Permanent link

Direct link