Patent ID: 8438036
Filing Date: 2013-05-07
Classification: G06F,G10L,H03H,H04L

Abstract:
1. An apparatus comprising: an input port that receives a digital audio input signal and that outputs a plurality of signals obtained from the digital audio input signal, wherein each signal is sampled at one of a plurality of frequencies; a rate estimator that is coupled to the input port, wherein the rate estimator determines at least one of the frequencies; a sampling rate converter (SRC) coefficient generator that is coupled to the rate estimator, wherein the SRC coefficient generator calculates a plurality of filter coefficients; a digital signal processor (DSP) that is coupled to the SRC coefficient generator and the input port, wherein the DSP performs digital-to-analog conversion filtering for the signal received from the input port and the filter coefficients from the SRC coefficient generator and wherein the DSP includes: interface circuitry that is coupled to the DSP and the input port, wherein the interface circuitry receives an output signal from the DSP.