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All-pass digital filter design in the frequency-delay domain using the iterative quadratic maximum likelihood algorithm

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3 Author(s)
Tapia, Javier J. ; DSP Lab., Packet Video Corp., Hoffman Estates, IL, USA ; Atkin, G.E. ; LoCicero, Joseph L.

A new domain, termed the frequency-delay is used to design stable, all-pass digital filters resembling a given delay response in the least-squares sense. This spectral technique identifies the delay response of a stable, second-order, all-pass digital filter as a double sideband suppressed carrier amplitude modulated signal in the frequency-delay domain. Iterative maximum likelihood techniques are used to render the filter coefficients. The algorithm is a significant improvement over related methods because it results in a physically realizable stable all-pass filter that closely approximates a desired delay response

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Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on  (Volume:6 )

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