Sampling, Aliasing & Nyquist Theorem
Sampling is a core aspect of analog-digital conversion. One huge consideration behind sampling is the sampling rate - How often do we sample a signal so we can accurately recreate it?
This may seem trivial at first, but serious problems can arise if we use a bad sample rate, as this can lead to aliasing - The failure to reconstruct the original signal, causing it to appear as a completely different wave of a lower frequency.
To combat this problem, we have to make use of the Nyquist-Shannon Sampling Theorem, which tells us what sample rate to use to prevent aliasing from happening. Today, we take a look at all these points and see just how they link together, to allow us to have the common sample rates (eg. 44100 Hz) we see today!
Want to see it for yourself? Try your hands on this interactive web application, and see how sampling rate and the quality of the reconstructed signal go hand in hand! https://resources.nerdfirst.net/sampling
= 0612 TV =
0612 TV, a sub-project of NERDfirst.net, is an educational YouTube channel. Started in 2008, we have now covered a wide range of topics, from areas such as Programming, Algorithms and Computing Theories, Computer Graphics, Photography, and Specialized Guides for using software such as FFMPEG, Deshaker, GIMP and more!
Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe!
Like what you see? Buy me a coffee → http://www.nerdfirst.net/donate/
0612 TV Official Writeup: http://nerdfirst.net/0612tv
More about me: http://about.me/lcc0612
Official Twitter: http://twitter.com/0612tv
= NERDfirst =
NERDfirst is a project allowing me to go above and beyond YouTube videos into areas like app and game development. It will also contain the official 0612 TV blog and other resources.
Watch this space, and keep your eyes peeled on this channel for more updates! http://nerdfirst.net/
-----
Disclaimer: Please note that any information is provided on this channel in good faith, but I cannot guarantee 100% accuracy / correctness on all content. Contributors to this channel are not to be held responsible for any possible outcomes from your use of the information.
Видео Sampling, Aliasing & Nyquist Theorem канала 0612 TV w/ NERDfirst
This may seem trivial at first, but serious problems can arise if we use a bad sample rate, as this can lead to aliasing - The failure to reconstruct the original signal, causing it to appear as a completely different wave of a lower frequency.
To combat this problem, we have to make use of the Nyquist-Shannon Sampling Theorem, which tells us what sample rate to use to prevent aliasing from happening. Today, we take a look at all these points and see just how they link together, to allow us to have the common sample rates (eg. 44100 Hz) we see today!
Want to see it for yourself? Try your hands on this interactive web application, and see how sampling rate and the quality of the reconstructed signal go hand in hand! https://resources.nerdfirst.net/sampling
= 0612 TV =
0612 TV, a sub-project of NERDfirst.net, is an educational YouTube channel. Started in 2008, we have now covered a wide range of topics, from areas such as Programming, Algorithms and Computing Theories, Computer Graphics, Photography, and Specialized Guides for using software such as FFMPEG, Deshaker, GIMP and more!
Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe!
Like what you see? Buy me a coffee → http://www.nerdfirst.net/donate/
0612 TV Official Writeup: http://nerdfirst.net/0612tv
More about me: http://about.me/lcc0612
Official Twitter: http://twitter.com/0612tv
= NERDfirst =
NERDfirst is a project allowing me to go above and beyond YouTube videos into areas like app and game development. It will also contain the official 0612 TV blog and other resources.
Watch this space, and keep your eyes peeled on this channel for more updates! http://nerdfirst.net/
-----
Disclaimer: Please note that any information is provided on this channel in good faith, but I cannot guarantee 100% accuracy / correctness on all content. Contributors to this channel are not to be held responsible for any possible outcomes from your use of the information.
Видео Sampling, Aliasing & Nyquist Theorem канала 0612 TV w/ NERDfirst
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
2. Sampling Theorem - Digital Audio FundamentalsAnti-Alisaing Filter - Brain Waves.aviBut what is the Fourier Transform? A visual introduction.Spectrum - Nyquist frequencySamplerates: the higher the better, right?Aliasing and Nyquist - Introduction & ExamplesFourier Transform, Fourier Series, and frequency spectrumPCM - Analog to digital conversionNyquist-Shannon; The Backbone of Digital SoundDigital Audio Explained - Samplerate and BitdepthSampling TheoremDigital Audio 101: Aliasing ExplainedWhat does the Laplace Transform really tell us? A visual explanation (plus applications)Shannon Nyquist Sampling TheoremTI Precision Labs – ADCs: Fast Fourier Transforms (FFTs) and WindowingRolling Shutter Explained (Why Do Cameras Do This?) - Smarter Every Day 172The truth about Nyquist and why 192 kHz does make senseWhat is Anti Aliasing (AA) as Fast as PossibleMore on Sampling, Aliasing & Reconstruction