Patent ID: 11875773
Assignee: BRITISH CAYMAN ISLANDS INTELLIGO TECHNOLOGY INC.
Field: Other consumer goods (Other fields)
Classification: CPC G | IPC G

Claim 28:
29. The method according to claim 28, wherein the step of generating the number U of anti-noise signals further comprises:
performing first interpolation over values of multiple first sample points in a first sequence related to a corresponding reference microphone and a second sampling clock to generate a value of a second sample point in a second sequence related to the first sampling clock, wherein the multiple first sample points are related to the second sample point in time axis;
storing multiple averaged sample values for multiple predefined degrees of rotation in one rotation into a memory device based on the first sampling clock;
performing average operation over the value of the second sample point and a corresponding averaged sample value of a previous rotation from the memory device to store an averaged sample value of a current rotation back to the memory device for each predefined degree of rotation;
performing second interpolation over a predefined number of the averaged sample values in the memory device according to the first sampling clock to generate a value of a third sample point in a third sequence related to the second sampling clock, wherein the predefined number of the averaged sample values are related to the third sample point in time axis; and
performing an adaptive filtering operation over the third sequence and one error signal from a corresponding error microphone based on a known adaptive algorithm to generate one anti-noise signal;
wherein a frequency of the second sampling clock is related to a fixed time interval;
wherein s1=s2=U=1; and
wherein the known adaptive algorithm is a least mean square algorithm.