Howtosignalprocessing
- How can we prevent aliasing?
- What is aliasing in PCM and how do we prevent it from happening?
- How is bandwidth related to sampling rate?
- What is aliasing effect in digital signal processing?
How can we prevent aliasing?
The solution to prevent aliasing is to band limit the input signals—limiting all input signal components below one half of the analog to digital converter's (ADC's) sampling frequency. Band limiting is accomplished by using analog low-pass filters that are called anti-aliasing filters.
What is aliasing in PCM and how do we prevent it from happening?
Aliasing is the effect of new frequencies appearing in the sampled signal after reconstruction, that were not present in the original signal. It is caused by too low sample rate for sampling a particular signal or too high frequencies present in the signal for a particular sample rate.
How is bandwidth related to sampling rate?
Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.
What is aliasing effect in digital signal processing?
In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled.
