PROJECT TITLE :

Design and Implementation of High-Speed All-Pass Transformation-Based Variable Digital Filters by Breaking the Dependence of Operating Frequency on Filter Order - 2016

ABSTRACT:

All-pass transformation (APT)-based variable digital filters (VDFs), also known as frequency warped VDFs, are typically utilized in numerous audio signal-processing applications. In an APT-based mostly VDF, all-pass filter structures of applicable order are used to switch the delay parts in a prototype filter structure. The resultant filter will offer variable frequency responses with unabridged management over cutoff frequencies on the fly, while not updating the filter coefficients. In this temporary, we have a tendency to briefly review the primary- and second-order APT-based mostly VDFs together with their hardware implementation architectures, and give generalized style procedures to comprehend them as per needed specifications. We tend to conjointly propose the changed pipelined hardware implementation architectures for both the primary- and second-order APT-based VDFs. Field-programmable gate array implementation results of various 1st- and second-order APT-based mostly VDF designs for both nonpipelined and pipelined implementation architectures are presented. An analysis of the results shows that the proposed pipelined implementation architectures lead to high-speed VDFs, achieving high operating frequencies that are independent of the prototype filter order, for each the primary- and second-order APT-based VDF designs.