Independent Component Analysis

author: Aapo Hyvärinen, University of Helsinki
published: Feb. 25, 2007,   recorded: January 2005,   views: 73222


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In independent component analysis (ICA), the purpose is to linearly decompose a multidimensional data vector into components that are as statistically independent as possible. For nongaussian random vectors, this decomposition is not equivalent to decorrelation as is done by principal component analysis, but something considerably more sophisticated. ICA allows one to separate nongaussian source signals from their linear mixtures 'blindly', i.e. using no other information than the congaussianity of the source signals. ICA can also be used to extract features from image and sound signals according to the principle of redundancy reduction that has its origins in the neurosciences. In my talks I will review the basic theory and theoretical background of ICA together with some recent theoretical developments.

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Download slides icon Download slides: mlss05au_hyvarinen_ica_01.pdf (5.2 MB)

Download slides icon Download slides: mlss05au_hyvarinen_ica_02.pdf (2.2 MB)

Download slides icon Download slides: mlss05au_hyvarinen_ica_03.pdf (97.5 KB)

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Reviews and comments:

Comment1 aws, June 12, 2007 at 7:12 p.m.:


Comment2 qaisi, June 12, 2007 at 7:15 p.m.:

the vedio doesnot work

Comment3 paul, November 6, 2007 at 2:42 p.m.:

Very good lecture giving exceptional insight into the subject. Recommended for anyone interested in learning more about ICA and its possible application to mixed signal analysis.

Comment4 amos, December 10, 2007 at 1:45 p.m.:

the speed of link the video is too slow,sometimes it does not work

Comment5 majid, April 12, 2008 at 12:04 p.m.:

wonderful but would you please upload the powerpoints files?
thanks a lot

Comment6 davor (VL editor), June 4, 2008 at 1:55 p.m.:

Guys, we dont have these slides, anyone volountiers to mail the author for the slides?

Comment7 Rogelio, September 3, 2008 at 6:10 p.m.:

Hello, do you know if is it possible to download these and other video files from


Comment8 M, September 15, 2008 at 4:56 p.m.:

Thanks for such nice lectures

Comment9 Nam_Beom, October 30, 2008 at 8:08 a.m.:

Thanks for nice presentation.
It is more helpful if you upload the slides.

Comment10 Mark Horvath, November 3, 2008 at 10:40 a.m.:

He has published his slides at:


Comment11 Nina (staff), November 8, 2008 at 9:53 p.m.:

Thanks for the link. All the lectures are now synchronized with the slides.

Comment12 Anvesh, November 25, 2008 at 1:24 p.m.:

Links not working!!!!!!!!!!!!

Comment13 Adnan, June 20, 2009 at 4:47 p.m.:

How to download this video???????/

Comment14 Turki, July 22, 2010 at 4:54 p.m.:

Very Good

How can I download these vedios?

Comment15 Sebar, October 13, 2010 at 9:05 a.m.:

Very nice lectures.

Comment16 Evgeni, December 25, 2011 at 3:40 a.m.:

Great lectures

Comment17 Rasmi K pati, December 25, 2013 at 3:25 p.m.:

Very Nice lectures. Really helpful and learn able.

where can i find the details of mathematics involved in the whole theory to calculate A and W matrix.The whole step by step process of calculating A and W matrix.

Thank you

Comment18 Satish Chouhan, February 10, 2014 at 1:52 p.m.:

On my system no video is working why?

Comment19 Nasrin, March 8, 2014 at 10:59 p.m.:

How can we download these videos?

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