Adaptive Variable Degree-k Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech
Joint Authors
Savoji, Mohammad Hassan
Ghahabi, Omid
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-03-06
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Electronic engineering
Information Technology and Computer Science
Abstract EN
A fast, efficient, and scalable algorithm is proposed, in this paper, for re-encoding of perceptually quantized wavelet-packet transform (WPT) coefficients of audio and high quality speech and is called “adaptive variable degree-k zero-trees” (AVDZ).
The quantization process is carried out by taking into account some basic perceptual considerations and achieves good subjective quality with low complexity.
The performance of the proposed AVDZ algorithm is compared with two other zero-tree-based schemes comprising (1) embedded zero-tree wavelet (EZW) and (2) the set partitioning in hierarchical trees (SPIHT).
Since EZW and SPIHT are designed for image compression, some modifications are incorporated in these schemes for their better matching to audio signals.
It is shown that the proposed modifications can improve their performance by about 15–25%.
Furthermore, it is concluded that the proposed AVDZ algorithm outperforms these modified versions in terms of both output average bit-rates and computation times.
American Psychological Association (APA)
Ghahabi, Omid& Savoji, Mohammad Hassan. 2011. Adaptive Variable Degree-k Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech. ISRN Signal Processing،Vol. 2011, no. 2011, pp.1-16.
https://search.emarefa.net/detail/BIM-449340
Modern Language Association (MLA)
Ghahabi, Omid& Savoji, Mohammad Hassan. Adaptive Variable Degree-k Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech. ISRN Signal Processing No. 2011 (2011), pp.1-16.
https://search.emarefa.net/detail/BIM-449340
American Medical Association (AMA)
Ghahabi, Omid& Savoji, Mohammad Hassan. Adaptive Variable Degree-k Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech. ISRN Signal Processing. 2011. Vol. 2011, no. 2011, pp.1-16.
https://search.emarefa.net/detail/BIM-449340
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-449340