A procedure to evaluate the coding gain for 2-D subband systems is explicitly presented, The technique operates in the signal domain and requires the knowledge of the input process auto-correlation function, Both the case of uniform subband and pyramid decomposition are considered. In the case of a separable input process spectrum, the evaluation can be performed by considering appropriately defined 1-D systems, thus, making the procedure very convenient in terms of computational complexity, Using a model that has been recently derived for difference images in motion-compensated image sequence coders, we compare the performance of several filter banks and transform coders in terms of coding gain and asymptotic rate-distortion figures, The results for intraframe and interframe coding show that uniform subband coders can have a performance superior to that of transform coders, Pyramidal schemes appear to have a slightly worse performance.

Computation of the coding gain for subband coders

CALVAGNO, GIANCARLO;MIAN, GIAN ANTONIO;RINALDO, ROBERTO
1996

Abstract

A procedure to evaluate the coding gain for 2-D subband systems is explicitly presented, The technique operates in the signal domain and requires the knowledge of the input process auto-correlation function, Both the case of uniform subband and pyramid decomposition are considered. In the case of a separable input process spectrum, the evaluation can be performed by considering appropriately defined 1-D systems, thus, making the procedure very convenient in terms of computational complexity, Using a model that has been recently derived for difference images in motion-compensated image sequence coders, we compare the performance of several filter banks and transform coders in terms of coding gain and asymptotic rate-distortion figures, The results for intraframe and interframe coding show that uniform subband coders can have a performance superior to that of transform coders, Pyramidal schemes appear to have a slightly worse performance.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/126604
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 4
social impact