ASYNCHRONOUS SAMPLE RATE CONVERTER

摘要

An asynchronous sample rate converter and method for converting an input signal to a resampled output signal is disclosed. An efficient and cost-effective sample rate converter for converting an input signal of arbitrary sample rate to a resampled output signal of a second sample rate is disclosed. A hardware-efficient sample-rate converter for resampling an audio input signal with an arbitrary sample rate to an output audio signal with a known sample rate for use in an audio processor is disclosed.

主权项

1. A sample rate converter for converting an input signal to a resampled output signal, the sample rate converter comprising:
a clock source for generating and/or accepting a clock signal; a counter configured to generate a count-disparity signal from the clock signal and the input signal; a first sigma delta loop configured to calculate a temporal correction value from the count-disparity signal; a resampled clock generator configured to generate one or more resampled clock signals from the temporal correction value; and a second sigma delta loop configured to generate the resampled output signal from one or more of the resampled clock signals and the input signal.