Yorkshire Bank took place in the bank's heartland and many miners were customers, having been encouraged by the National Coal Board to have their pay mandated to a bank account. In 1990, the National Australia Bank Group acquired the bank from the consortium of owning banks which, after mergers and acquisitions, were the National Westminster Bank, (holders of 40%), Barclays Bank (32%), Lloyds Bank (20%), and Royal Bank of Scotland (8%). The price paid was £1 billion and the bank joined National Australia Bank's other European businesses, Clydesdale Bank (Scotland) and Northern Bank (which operated in both jurisdictions in Ireland). In May
Multirate filter bank and multidimensional directional filter banks are on the lattice generated by the decimator. Commonly used decimator is the quincunx decimator whose lattice is generated from the Quincunx matrix which is defined by formula_16. A quincunx lattice that is generated by this matrix is shown in figure. It is important to analyze filter banks from a frequency domain perspective in terms of subband decomposition and reconstruction. However, equally important is a Hilbert space interpretation of filter banks, which plays a key role in geometrical signal representations. For a generic K-channel filter bank, with analysis filters formula_17, synthesis filters formula_18, and sampling matrices formula_19. In the analysis