In this paper1 a new wavelet based coding scheme exploiting Wavelet Atoms and a Non Uniform Sampling (WANUS) of the lowest frequency band is presented. The encoder only sends the lowest frequency band (LFB) to the decoder. This latter exploits atomic approximation for predicting wavelet details band from LFB. Since this strategy only works in an undecimated wavelet domain, we prove here that an effective adaptive downsampling of the LFB can be reached using the minimax technique. The proposed scheme outperforms available coders in terms of rate-distortion results requiring a moderate computational effort.
A WAVELET BASED CODING SCHEME VIA ATOMIC APPROXIMATION AND ADAPTIVE SAMPLING OF THE LOWEST FREQUENCY / Bruni, Vittoria; Vitulano, D.. - (2008). (Intervento presentato al convegno IEEE-EURASIP 16th European Signal Processing Conference, EUSIPCO 2008 tenutosi a Lausanne; Switzerland nel August 2008).
A WAVELET BASED CODING SCHEME VIA ATOMIC APPROXIMATION AND ADAPTIVE SAMPLING OF THE LOWEST FREQUENCY
BRUNI, VITTORIA;VITULANO D.
2008
Abstract
In this paper1 a new wavelet based coding scheme exploiting Wavelet Atoms and a Non Uniform Sampling (WANUS) of the lowest frequency band is presented. The encoder only sends the lowest frequency band (LFB) to the decoder. This latter exploits atomic approximation for predicting wavelet details band from LFB. Since this strategy only works in an undecimated wavelet domain, we prove here that an effective adaptive downsampling of the LFB can be reached using the minimax technique. The proposed scheme outperforms available coders in terms of rate-distortion results requiring a moderate computational effort.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
