Data processing filtering method and apparatus

Claim 2

Apparatus for processing a signal, including a filter comprising: a. input means whereby a signal may be introduced to said filter, and output means whereby such an output signal so introduced to said filter and processed thereby may be output from said filter; b. signal delay means for providing a time delay to a signal; c. difference means in communication with said input means and with the output of said signal delay means, whereby the output of said signal delay means may be compared with such input signal and the difference of said two signals provided at said filter output means as the output from said filter; d. a feedback loop also in communication with the output of said signal delay means and including a first multiplicative scaler featuring a first scaler parameter for scaling said output of said signal delay means; e. summing means for receiving said input signal and combining said input signal with said output of said signal delay means as scaled by said scaler to provide a combined signal as output of said summing means; f. a second multiplicative scaler, featuring a second scaler parameter, for scaling said combined signal from said summing means and communicating said scaled signal to said signal delay means; and g. means for digitally sampling such a signal to be filtered and communicated as said input signal to said input means of said filter, wherein said sampling means effects sampling periodically, and wherein said periodic sampling is synchronized to begin at the start of noise structure of said signal being sampled.

Claim 3

Apparatus as defined in claim 1 further comprising: a. means for recording structural features of processed signals output from said filter; and b. means for subtracting said recorded structures from said filter output signals.

Claim 4

Apparatus for processing a signal, including a filter comprising: a. input means whereby a signal may be introduced to said filter, and output means whereby such an output signal so introduced to said filter and processed thereby may be output from said filter; b. signal delay means for providing a time delay to a signal; c. difference means, in communication with said input means and with the output of said signal delay means, whereby the output of said signal delay means may be compared with such input signal and the difference of said two signals provided at said filter output means as the output from said filter; d. a feedback loop also in communication with the output of said signal delay means and including a first multiplicative scaler featuring a first scaler parameter for scaling said output of said signal delay means; e. summing means for receiving said input signal and combining said input signal with said output of said signal delay means as scaled by said scaler to provide a combined signal as output of said summing means; f. a second multiplicative scaler, featuring a second scaler parameter, for scaling said combined signal from said summing means and communicating said scaled signal to said signal delay means; and g. means for digitally sampling such a signal to be filtered and communicated as said input signal to said input means of said filter, wherein said sampling means effects sampling periodically, and wherein said sampling is synchronized to begin a sample period after the beginning of noise structure of said signal being sampled.

Claim 5

Apparatus for processing a signal, including a filter comprising: a. input means whereby a signal may be introduced to said filter, and output means whereby such an output signal so introduced to said filter and processed thereby may be output from said filter; b. signal delay means for providing a time delay to a signal; c. difference means, in communication with said input means and with the output of said signal delay means, whereby the output of said signal delay means may be compared with such input signal and the difference of said two signals provided at said filter output means as the output from said filter; d. a feedback loop also in communication with the output of said signal delay means and including a first multiplicative scaler featuring a first scaler parameter for scaling said output of said signal delay means; e. summing means for receiving said input signal and combining said input signal with said output of said signal delay means as scaled by said scaler to provide a combined signal as output of said summing means; f. a second multiplicative scaler, featuring a second scaler parameter, for scaling said combined signal from said summing means and communicating said scaled signal to said signal delay means; and g. means for digitally sampling such a signal to be filtered and communicated as said input signal to said input means of said filter, wherein said sampling means effects sampling periodically, and wherein said sampling is synchronized to begin a sample period after the beginning of noise structure of said signal being sampled.

Claim 6

Apparatus as defined in claim 3 further comprising: a. means for recording structural features of processed signals output from said filter; and b. means for subtracting said recorded structures from said filter output signals.

Claim 9

A method as defined in claim 5 further comprising the following steps: a. recording a structure of said output signal; and b. subtracting said structure from said output signal.

Claim 12

A method as defined in claim 7 further comprising the following steps: a. recording a structure of said output signal; and b. subtracting said structure from said output signal.

Claim 13

Apparatus for filtering periodic noise from signals comprising: a. signal delay means for selectively storing and delaying the communication of signals; b. first and second multiplicative scalers, featuring first and second scaler parameters, respectively, for varying the amplitudes of signals while maintaining their respective proportional shapes; c. summing means for adding two signals; and d. difference means for comparing two signals and obtaining the difference between said signals; e. wherein an input signal from which such periodic noise is to be filtered is so added by said summing means to the delayed signal output from said delay means scaled by said first scaler, with said summed signal scaled by said second scaler and input to said delay means, and the output of said delay means is subtracted by said difference means from said input signal from which periodic noise is to be filtered; and f. means for digitally sampling said signal to be filtered at a selected sampling period, wherein said sampling is synchronized to said periodic noise to be filtered from said signal.

Claim 14

Apparatus for filtering periodic noise from signals comprising: a. signal delay means for selectively storing and delaying the communication of signals; b. first and second multiplicative scalers, featuring first and second scaler parameters, respectively, for varying the amplitudes of signals while maintaining their respective proportional shapes; c. summing means for adding two signals; and d. difference means for comparing two signals and obtaining the difference between said signals; e. wherein an input signal from which such periodic noise is to be filtered is so added by said summing means to the delayed signal output from said delay means scaled by said first scaler, with said summed signal scaled by said second scaler and input to said delay means, and the output of said delay means is subtracted by said difference means from said input signal from which periodic noise is to be filtered; and f. means for digitally sampling said signal to be filtered at a selected sampling period, wherein said sampling is synchronized to said periodic noise to be filtered from said signal.

Claim 15

Apparatus as defined in claim 9 further comprising: a. means for recording structural features of the signal output from said difference means; and b. means for subtracting said recorded structural features from said difference means output signal.