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US 7,406,493 B2Granted
Up-sampling half-band reconstruction filtering
AssigneeTektronix, Inc.
InventorKevin M. Ferguson
Life of this patent
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Abstract
An up-sampled half band reconstruction filter has a seagull architecture in the form of a pair of parallel infinite impulse response (IIR) filters, one receiving as an input an input signal delayed by one sample time and the other receiving as an input a reverse version of the input signal delayed by one sample time. The outputs from the pair of parallel IIR filters are combined with the input signal to produce a reconstruction filter output in response to the input signal.
Claims4
A reconstruction filter having a seagull architecture comprising:
- a first infinite impulse response filter having as an input a signal delayed by one sample time and having as an output a first filter output;
- a second infinite impulse response filter having as an input a reverse version of the signal delayed by one sample time and having as an output a second filter output;
- and
- means for combining the first and second filter outputs and the signal to produce a reconstruction filter output.
1 more element
A method of reconstruction filtering an input signal comprising the steps of:
- infinite impulse response filtering the input signal delayed by one sample time to produce a first filter output;
- infinite impulse response filtering a reverse version of the input signal delayed by one sample time to produce a second filter output;
- and
- combining the first and second filter outputs and the input signal to produce a reconstruction filter output in response to the input signal.
1 more element
Dependencies are inferred from the claim text.