Patent ID: 8139305
Filing Date: 2012-03-20
Classification: G11B

Abstract:
1. A data processing system, the system comprising: a sample splitting circuit, wherein the sample splitting circuit is operable to receive a data input, wherein the data input includes a series of samples that repeat periodically over at least a first phase and a second phase, and wherein the sample splitting circuit is operable to divide the series of samples into at least a first sub-stream corresponding to the first phase and a second sub-stream corresponding to the second phase; a first averaging circuit, wherein the first averaging circuit is operable to average values from the first sub-stream to yield a first average; a second averaging circuit, wherein the second averaging circuit is operable to average values from the second sub-stream to yield a second average; a parameter calculation circuit, wherein the parameter calculation circuit is operable to calculate a frequency value based at least in part on the first average and the second average; a differencing circuit operable to calculate a first differencing sequence based at least in part the first sub-stream and a second differencing sequence based at least in part on the second sub-stream; and wherein the parameter calculation circuit includes a frequency computation circuit, wherein the frequency computation circuit is operable to calculate the frequency value based at least in part on the first differencing sequence and the second differencing sequence.