Patent ID: 6714603
Filing Date: 2004-03-30
Classification: G11B,H04L

Abstract:
A zero phase restart unit for determining an initial interpolation interval (&mgr;0) for digitally resampling a stream of asynchronous samples of an analog signal, the initial interpolation interval (&mgr;0) providing a time interval after an asynchronous sample at which a synchronous sample is interpolated, the zero phase restart circuit comprising:circuitry configured to generate a quotient from a plurality of asynchronous samples from the series of asynchronous samples; a comparator configured to compare the quotient to a plurality of predetermined fractions, wherein each of the predetermined fractions represents a boundary point from a plurality of boundary points, and the quotient falls between an interval defined by two of the boundary points; and circuitry configured to select the initial interpolation interval value (&mgr;0) stored in a lookup table based on the comparison of the quotient to the plurality of predetermined fractions.