Boots – shoes – and leggings
Patent
1995-07-31
1998-02-10
Elmore, Reba I.
Boots, shoes, and leggings
G06F 1717
Patent
active
057176183
ABSTRACT:
An improved method for digital interpolation of signals for a second interpolation filter is disclosed which permits a high signal
oise ratio with a minimum amount of circuitry for an overall system comprising first and second interpolation filters. The method for digital interpolation of signals requires multiplying delayed input values locked to a first signal by corresponding weighting factors which are dependent on a time-difference value determined by the interpolating instant and the time grid of the first clock signal. The weighting factors are determined by an impulse response in the time domain. The associated transfer function has an attenuation characteristic in the frequency domain which, with respect to the stop bands, is limited essentially to the alias regions located at the frequency multiples of the first clock signal. Each of these alias regions is assigned at least two adjacent zeros, or in the presence of double-order zeros, at least one of the alias regions and the associated periodic alias regions are assigned at least one further zero of the transfer function.
REFERENCES:
patent: 4954824 (1990-09-01), Yamada et al.
patent: 5121065 (1992-06-01), Wagner
patent: 5398029 (1995-03-01), Toyama et al.
patent: 5504785 (1996-04-01), Becker et al.
patent: 5541864 (1996-07-01), Van Bavel et al.
Menkhoff Andreas
Temerinac Miodrag
Winterer Martin
Witte Franz-Otto
Deutsche ITT Industries GmbH
Elmore Reba I.
Moise Emmanuel L.
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