Systems and methods for implementing a sample rate converter using hardware and software to maximize speed and flexibility

A sample rate converter comprising:

• a plurality of sample rate converter components, including:
• a rate estimator;
• a low pass filter, wherein an output of the rate estimator is passed through the low pass filter;
• a phase selection unit, wherein an output of the low pass filter is provided to the phase selection unit;
• a polyphase coefficient interpolator, wherein a set of interpolated polyphase filter coefficients is generated by the polyphase coefficient interpolator based upon an output of the phase selection unit;
• a convolution unit configured to convolve the interpolated polyphase filter coefficients with a corresponding sample of an input data stream;
• an input FIFO configured to receive samples of the input data stream and to provide the samples of the input data stream to the convolution unit;
• an output FIFO configured to receive samples of an output data stream from the convolution unit;
• and
• a FIFO management unit coupled to the input and output FIFOs and configured to provide feedback to the low pass filter;
• wherein a first portion of the components comprise hardware components;
• and
• wherein a second portion of the components comprise software components.