Multi-stream audio sampling rate conversion circuit and method

A sample rate conversion circuit for converting data sampled at different rates comprising:

• means for receiving a plurality of input data streams wherein each input data stream contains data sampled at a different rate and for storing converted output data representing the at least one input data stream as if it were sampled at a different rate;
• residue memory means, operatively coupled to the means for receiving, for storing previous data samples separately and simultaneously for each of the plurality of input data streams;
• and
• means, operatively coupled to the means for receiving, the residue memory, and the coefficient memory, for alternately converting each of the plurality of input data streams to the converted output data representing at least one input data stream as if it were sampled at a different rate, based on the stored previous samples for each input data stream and for controlling when the residue memory means receives the data samples for each separate input stream.

A method for converting data sampled at different rates comprising:

• receiving a plurality of input data streams wherein each input data stream contains data sampled at a different rate;
• storing previous data samples separately and simultaneously for each of the plurality of input data streams in residue memory;
• and
• alternately converting each of the plurality of input data streams to output data representing at least one input data stream as if it were sampled at a different rate, based on the stored previous samples for each input data stream.