Patent ID: 7602875
Filing Date: 2009-10-13
Classification: H03H

Abstract:
1. A sampling rate conversion apparatus for converting first data, sampled at a first sampling rate, into second data, sampled at a second sampling rate, said apparatus comprising: a FIFO for storing said first data responsive to a first clock signal and for outputting said first data as second data responsive to a second clock signal, said FIFO storing said first data based on a write control signal indicating whether or not said first data written directly previously is to be updated to said first data; said FIFO outputting the second data read out based on a read control signal indicating whether or not the second data as read out is to be read out during a next time interval as well; and a calculating unit for generating the write control signal and the read control signal from a value of a second current clock frequency for a current time interval and from a value of a current predicted clock frequency to output the write control signal and the read control signal value thus generated to said FIFO, wherein the value of said second current clock frequency value comprises a measured value of said second clock signal for the current time interval, and wherein the value of said current predicted clock frequency represents a predicted value of the frequency of said first clock signal during the current time interval.