Linear phase cosine modulated maximally decimated filter banks with perfect reconstruction

The analysis and synthesis filters of maximally decimated FIR cosine modulated filter banks have a linear phase within a new design system for these filters. The coding gain of the system is comparable to that of a traditional M-channel system due to the use of two band-pass filters with a similar passband support. The system design can have either the approximate reconstruction property or perfect reconstruction property. The system has good attenuation characteristics, and is efficient.