Sampling rate converter

A sampling test converter for converting first digital signals having a first clock rate to second digital signals having a second clock rate, comprising:

• means for determining the ratio of said first and second clock rates;
• a memory having stored therein a plurality of groups of digital filter coefficients, each group of which corresponds to a different range of said ratio;
• and
• means responsive to said means for determining said ratio for selecting the filter coefficient group corresponding to said ratio at a given time;
• said responsive means comprising means for continuing to select said selected filter coefficient group as long as said ratio is within a predetermined range of the ratio range of the corresponding filter coefficient group.

A method for converting first digital signals having a first clock rate to second digital signals having a second clock rate, comprising:

• determining the ratio of said first and second clock rates;
• storing, in a memory, a plurality of groups of digital filter coefficients, each group of which corresponds to a different range of said ratio;
• selecting the filter coefficient group corresponding to said ratio at a given time in response to said step of determining said ratio;
• continuing said selection of said selected filter coefficient group as long as said ratio is within a predetermined range of the ratio range of the corresponding filter coefficient group;
• and
• digitally filtering said first data signal in an arithmetic circuit, using said coefficients of selected filter coefficient group, to produce said second digital signals.