Efficient high speed delayed multipath two-dimensional recursive digital filter architecture

An efficient transformation method for the realization of a delayed multipath two-dimensional IIR (infinite impulse response) digital filter is presented. Although the structure does not give 100% multiprocessing efficiency, the maximum overall throughput improvement that can be achieved is high. The delayed multipath structure has been successfully applied to the realization of an FIR (finite impulse response) digital filter. In actual implementation, the method involves difficulty when applied directly to an IIR digital filter because of the inherent timing constraint in the recursive loop. With the transformation method, extra loop delay is allowed in the recursive part of the multipath structure. Consequently, the problem of inherent timing constraint in the recursive loop is solved. Furthermore, the transformation method is efficient in terms of computational complexity, throughput improvement, and multiprocessing efficiency.<>