Variable sample rate converter adaptable to rational ratios

A sample rate conversion method used to convert a plurality of data from a first sample rate to a second sample rate, the first and second sample rates being associated to a clock signal, the sample rate conversion method comprising:

• selecting a predetermined number of data from the plurality of data, the predetermined number of data having the first sample rate;
• selecting a predetermined number of phases from a phase filter, the phase filter having a plurality of phases, the predetermined number of phases being appropriately chosen for the predetermined number of data;
• processing the predetermined number of data using the predetermined number of phases to form a plurality of processed data;
• and
• selecting a predetermined number of the plurality of processed data in response to a predetermined number of clock signals, the selected predetermined number of the processed data having the second sample rate.

An image processing system comprising:

• a clock signal;
• a data control buffer used to select a predetermined number of data from a plurality of data in response to the clock signal, the predetermined number of data having a first sample rate, the data control buffer comprising a ping pong buffer;
• a coefficient control buffer used to select a predetermined number of phases from a phase filter, the phase filter having a plurality of phases;
• a processor that processes the predetermined number of data using the predetermined number of phases to form a plurality of processed data;
• and
• an output buffer that stores the plurality of processed data, the output buffer releases predetermined number of the plurality of processed data in response to a predetermined number of clock signals, the predetermined number of the plurality of processed data having a second sample rate.