Investigation of Window Effects and the Accurate Estimation of Spectral Centroid

α
Venkata Krishna Rao M
Venkata Krishna Rao M
α Jawaharlal Nehru Technological University, Hyderabad

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Investigation of  Window Effects and the Accurate Estimation of Spectral Centroid

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Abstract

The spectral centroid is one of the useful low level features of a signal that was proposed for speech-music classification, speech recognition and musical instrument classification, and was also considered one of the lowlevel features to describe the audio content in MPEG-7 Content Description and Interface Standard. When the spectral centroid is computed from practical data, the estimate is different from the true expected theoretical value. Moreover, the behavior of the estimation error, when computed from finite length data i.e. from a short segment of signal would of high interest because most of the classification algorithms use dynamic features as the signals are nonstationary. In this paper, windowing effects on the spectral centroid estimation are investigated considering some well structured signals that appear frequently in speech and audio content. A novel algorithm is proposed to counter the window effects and better estimation of spectral centroid.

References

10 Cites in Article
  1. Emery Schubert,Joe Wolfe (2006). Does Timbral Brightness Scale with Frequency and Spectral Centroid?.
  2. E Scheirer,M Slaney (1997). Construction and evaluation of a robust multifeature speech/music discriminator.
  3. E Wold,T Blum,D Keislar,J Wheaton (1996). Content-based classification, search, and retrieval of audio.
  4. G Peeters,A Burthe,X Rodet (2002). Toward automatic music audio summary generation from signal analysis.
  5. Jia Min,Karen Kua,Et Al (2010). Investigation of Spectral Centroid Magnitude and Frequency for Speaker Recognition.
  6. Et Jingdong Chen,Al (2004). Recognition of Noisy Speech Using Dynamic Spectral Subband Centroids.
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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Venkata Krishna Rao M. 2015. \u201cInvestigation of Window Effects and the Accurate Estimation of Spectral Centroid\u201d. Global Journal of Research in Engineering - J: General Engineering GJRE-J Volume 15 (GJRE Volume 15 Issue J4): .

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords
Classification
GJRE-J Classification: FOR Code: 291899p
Version of record

v1.2

Issue date

June 1, 2015

Language
en
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The spectral centroid is one of the useful low level features of a signal that was proposed for speech-music classification, speech recognition and musical instrument classification, and was also considered one of the lowlevel features to describe the audio content in MPEG-7 Content Description and Interface Standard. When the spectral centroid is computed from practical data, the estimate is different from the true expected theoretical value. Moreover, the behavior of the estimation error, when computed from finite length data i.e. from a short segment of signal would of high interest because most of the classification algorithms use dynamic features as the signals are nonstationary. In this paper, windowing effects on the spectral centroid estimation are investigated considering some well structured signals that appear frequently in speech and audio content. A novel algorithm is proposed to counter the window effects and better estimation of spectral centroid.

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Investigation of Window Effects and the Accurate Estimation of Spectral Centroid

Venkata Krishna Rao M
Venkata Krishna Rao M Jawaharlal Nehru Technological University, Hyderabad

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