To provide a sampling frequency conversion device that converts a sampling frequency for an input signal at a fractional ratio as calculating only necessary sample signals.
The sampling frequency conversion device includes an interpolation filter. The interpolation filter has a plurality of cascade-connected delay units, a plurality of multipliers for multiplying an input signal input into the interpolation filter and signals output from the delay units by tap coefficients to produce sample signals, a plurality of adders for adding up the sample signals output from the plurality of multipliers, and a counter circuit for counting pulses of a second clock signal, and outputs tap coefficients corresponding to the count value of the counter circuit to the plurality of multipliers to convert a first sampling frequency for the input signal to a second sampling frequency.
HIRAYAMA HIROHISA
FUKINO KOJI
| JP2005192174A | 2005-07-14 | |||
| JP2006121719A | 2006-05-11 |
| US6057789A | 2000-05-02 |
Toshiyuki Miyadera
Shuji Ouchi