Design of low-delay cosine-modulated filter banks with equiripple reconstruction error

A method for the design of low-delay multichannel cosine-modulated filter banks with nearly perfect reconstruction is proposed. The method is based on the trade-off between obtaining the equiripple reconstruction error and minimizing the stopband energy of the prototype filter. The filter bank design problem is solved by means of its transformation into an equivalent bicriterion optimization problem. A starting point located close to the final solution is calculated analytically. Design example is included to demonstrate the proposed approach.