Local orthogonal bases
Riccardo Bernardini, Jelena Kovačević · Proceedings - International Conference on Image Processing · 2002
Discrete-time cosine modulated filter banks, or modulated lapped transforms (MLT), have been in use for some time. Due to a few of their properties, they have become quite popular. For example, all filters (basis functions) of a filter bank are obtained by appropriate modulation of a single prototype filter. We present a new method for constructing local orthogonal bases, both in continuous and discrete time. The approach is very general and can handle a large variety of cases interesting for the applications.