c=ufilterbank(f,g,a);
ufilterbank(f,g,a) applies the filter given in g to the signal f. Each subband will be subsampled by a factor of a (the hop-size). If f is a matrix, the transformation is applied to each column.
The filters g must be a cell-array, where each entry in the cell array corresponds to a filter.
If f is a single vector, then the output will be a matrix, where each column in f is filtered by the corresponding filter in g. If f is a matrix, the output will be 3-dimensional, and the third dimension will correspond to the columns of the input signal.
The coefficients c computed from the signal f and the filterbank with windows g_m are defined by