SAMPLING FREQUENCY CONVERTER

PURPOSE:To obtain a sampling frequency converter with simple circuit configuration and capable of reducing a noise due to re-sampling. CONSTITUTION:A clock generator 1 outputs a clock CLK1 of (n) times a first sampling frequency before conversion. An over-sampling signal generator 2 outputs over-sampling data DS of (m) times the first sampling frequency from input digital voice data DI. A counter 3 counts the clock CLK1 for n/m times. An interpolator 4 operates interpolation data DM at every clock CLK1 based on the over-sampling data and the output value (x) of the counter 3. A re- sampler 5 performs the sampling of the interpolation data DM by a clock CLK2 of sampling frequency. Thereby, since the re-sampling of data equivalent to the one to which the sampling by the clock CLK1 is applied can be performed, digital voice data with high precision can be obtained.