Abstract: Variable digital filters (VDF) are the digital filters that are used in most signal processing applications whose frequency specifications such as cut-off frequency can be controlled. The warped filters, obtained by replacing each unit delay of a digital filter with an all-pass filter, are widely used for various audio processing applications such as linear prediction, echo cancellation, loudspeaker equalization, spectrally modifying an audio signal and detection of band pass signals in broadband signals. However, warped filters require first-order all-pass transformation to obtain variable low-pass or high-pass responses, and second-order all-pass transformation to obtain variable bandpass or bandstop responses. To overcome this we design a Digital Warped filter.
Title: An Improved Coefficient Decimation Based Reconfigurable Low Complexity Wrapped Filter Implementation,
Author: Suresh Babu, Mrs.S.T.Aarthy
International Journal of Engineering Research and Reviews
ISSN 2348-697X (Online)
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