Biorthogonal B-Spline filter banks for low bit rate video coding

Abstract

In this paper we investigate the performance of B-Spline filter banks for low bit rate image coding. The influence of certain characteristics of the analysis and synthesis of FIR filters are studied. These include the B-Spline polynomial order, the effects of coefficient truncation, coding quantisation and the distortion introduced by the filters themselves. Due to the high concentration of energy in the low frequency band, these biorthogonal filter banks have better capabilities to reconstruct signals from the lower frequency band than their counterparts. As a result a very low bit rate video codec can be designed by coarse quantisation of the higher bands.