The perceptual high quality audio coding based on dynamic wavelet packet transform

• Autorzy: Petrovsky A. , Petrovsky A.
• Konferencja: X Sympozjum Nowości w Technice Audio i Wideo, Wrocław, 16-18 września 2004
• Języki publikacji: EN

Abstrakty

EN

The new perceptual high quality audio coding based on a dynamic wavelet packet transform is presented in the given paper. Tme-frequency signal decomposition is adapted to the source using wavelet packet (WP) or time-shift wavelet packet (TSWP) transforms. Due to TSWP it is possible to increase the flexibility of the analysis filter bank in a time scale and copression level. The masking thresholds are estimated in a wavelet domain and dynamic reconfigurable WP tree structure is formed basing on perceptual entropy. The advantages of this approach are better viewed by considering the waveled packet growing as a spilting process., i.e. the temporal construction WP tree created for each signal frame presents an ideal decision for real time processing implemented in a reconfigurable handware.

Słowa kluczowe

EN

Discrete Wavelet Packet Trans/on; psychoacoustics; audio coding

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Telekomunikacji i Akustyki Politechniki Wrocławskiej. Konferencje
• Rocznik: 2004
• Tom: Vol. 85, nr 29
• Strony: 153--159
• Opis fizyczny: bibliogr. 9 poz., rys., tab.

Twórcy

autor

Petrovsky A.

• Belarusian State University of Informatics and Radioelectronics

autor

Petrovsky A.

• Bialystok Technical University

Bibliografia

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• [3] PHILIPPE P, MOREAU DE SAINT-MARTIN P., LEVER M., Wavelet packet filterbanks for low time delay audio coding, IEEE Trans. Speech Audio Processing, vol. 7, No. 3, 1999, pp. 310-322
• [4] PETROVSKY Al. KRAHE D., PETROVSKY A.A., Real-Time Wavelet Packet-based Low Bit Rate Audio Coding on a Dynamic Reconfigurable System, 114th AES Convention, preprint No. 5778, 22-25 May, Amsterdam, Netherlands, 2003, 22 p.
• [5] PETROVSKY Al., PETROVSKY A., Dynamic algorithm transforms for reconfigurable real-time audio coding processor, IEEE Computer Soc. Press, 2002, pp. 422-424
• [6] COHEN I., RAZ S., MALAH D., Orthonormal shift-invariant adaptive packet decomposition and representation H Signal Processing 57 (3), March 1997, pp. 251-270.
• [7] WICKERHAUSER M.V., Adaptive Wavelet Analysis from Theory to Software, A.K. Peters Ltd., Massachusetts, 1994,486 p.
• [8] PETROVSKY Al., Perceptually optimized time-varying wavelet packet decomposition and its applications in acoustic signal processing, International Congress of Acoustics (ICA'2001), Rome, Italy, 2-7 Sept. 2001, 2p.
• [9] KOZŁOWSKI P., DOBRUCKI A.B., Proposed changes to the methods of objective, perceptual based evaluation of copressed speech and audio signals, 116th AES Convention, preprint No. 6085, 8-11 May, Berlin, Germany, 2004