DSP Basics
What is DSP ? D igital S ignal P rocessor device which takes digital signal and alters them through different algorithms and provides the results within milliseconds. These are normally found in Speakers, Mobiles.. In audio applications, DSP plays a key role to use different features like ANC, adaptive filtering, Noise suppression.. Digital Signal Processing : X(t) -> Anti aliasing -> Sample & hold -> ADC -> DSP -> DAC -> Reconstructed signal -> Y(t) Audio Processing - Modification audio within same domain Sampling - Converting the continuous signal into discrete signal Nyquist Theorem - Samples that can be reconstructed back when sampling at frequency higher than the maximum frequency Nyquist rate - Rate at which a signal can be re-constructed after sampling fs >2fmax ex: For 10khz signal will have to sampled at greater than 20khz