Signal processor with digital filter and integrating network
AssigneeU.S. Philips Corporation
InventorLudwig Desire Johan Eggermont
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Abstract
System comprising an integrating digital signal processing device to which input signal samples x(nT) are supplied with a period T and which supplies output signal samples z(mrT) with a period rT. To this end in this integrating signal processing device consecutive groups having a period rT and consisting of r successive consecutive signal samples are processed beforehand in a non-recursive digital filter for generating auxiliary signal samples y(mrT) which occur with a period rT, the last mentioned samples being integrated in an integrating network for generating the output signal samples z(mrT).
Claims5
A signal processing device comprising
- input means for supplying a sequence of input signals x(nT), where n is an integer, and T a predetermined input sampling period;
- digital filter means connected to said input means, and having an output for producing a sequence of binary coded auxiliary signals y(mrT), having a predetermined sampling frequency relationship to said input signals given by ##EQU11## wherein W is a weighting factor;
- m = 0, 1, 2, 3 . . . etc.;
- rT is the sampling period of said auxiliary signals;
- and x(mr-i)T = 0 for mr-i <0;
- and
- an integrating network having an input connected to said output of said digital filter means, and an output for generating signal samples z(mrT) related to said auxiliary signal samples by ##EQU12## where z [(m-1)rT] = 0 for all m-1 <
- 0.
Dependencies are inferred from the claim text.