Data compression of natural signals based on discrete wavelet transform analysis
nolisp.pdf (3,438Mb) (Restricted access) Request copy
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Document typeConference report
Rights accessRestricted access - publisher's policy
In this paper we explore the use of the discrete wavelet transform analysis of an arbitrary signal in order to improve the data compression capability of data coders. Wavelet analysis is widespread used in image codifiers, for example in JPEG2000. The wavelet compression methods are adequate for representing transients, such as percussion sounds in audio, or high-frequency components in two-dimensional images, for example an image of stars on a night sky. The wavelet analysis provides a subband decomposition of any arbitrary signal, and this enables a lossless or a lossy implementation with the same architecture. The signals could range from speech to sounds or music, but the approach is more orientated to other natural signals like arbitrary discrete series, EEG or ECG. Experimental results based on coefficients quantification, show a loss less compression of 2: I in all kind of signals, and lossy results preserving most of the signal waveform of about 5: I to 3: I.
CitationReig, R. [et al.]. Data compression of natural signals based on discrete wavelet transform analysis. A: International conference on non-linear speech processing. "An ISCA tutorial and research workshop on non-linear speech processing : NOLISP 09 : Non-Linear Speech Processing 2009, programme and abstracts, Vic, june 25-27, 2009". Vic: 2009.
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder