Compression - Computerphile

Most of us deal with data compression on a daily basis, but what is it and how does it work? Professor David Brailsford introduces compression with regards to text and pictures.

This video was filmed and edited by Sean Riley.
(some questions from Brady, in case you are confused!)

[doemaeries]

Without compression this video would be 1920pixel*1080pixel*24bit depth*25fps*(7*60+38)seconds = 569825280000bit = 71.23GB big.

[RyanHansen_]

I love any 45+ computer science professionals/lecturers, they have a very calm way of explaining ideas :)

[amsyarzero]

My lecturer asked our class to search about _data compression_ & _data encryption_, and I stumbled upon this video. I was surprised to see that he's a professor at the University of Nottingham, which is also the same university that I'm attending right now.

I love the nonchalant and easy-to-understand way you explained encryption, professor! 👍🏼

[sunsmusic]

This is the best explanation I have ever watched regarding compression... Professor David Brailsford is awesome !!

[Computerphile]

yes, one video at a time! there's a lot to say about a lot of topics! this is just a YouTube channel!

>Brady

[Computerphile]

Send us your details and we'll give you your money back! ;)

Hope you stick with us and some of the videos to come will be more to your liking. We are never going to jump straight into the deep end... We're wading in gradually so our bits don't get too cold!

>Brady

[Computerphile]

Hi, captions are quite a bit of extra work and we are super busy. I'd LOVE to have them... Numberphile has them done by an external organisation and I have nothing to do with it... Unfortunately computerphile does not have this same deal!
>Brady

[Drigger]

He sounds sooo passionate about this!!!

[jonpleasetalk]

As always Brady asks the best questions. As i expected this channel is getting better and better!

[SyphistPrime]

I came up with the dumbest idea for my friend and I to develop, a lossy alternative to .zip and .rar. Just imagine all the affects you could get.

[decimator]

I see a lot of people complaining about computerphile being too basic, too simple, too trivial. Well, for me, its just perfect. Im studying materials science so i allready know a whole lot of stuff discussed in periodic videos or sixty symbols. But i am completely ignorant about computers and these videos are a easy to digest sustenance for my brain :3

[kenbobcorn]

I find this video is very introductive to the topic, and gives a very brief overview of what compression is.(great for people like myself) It was made clear in the video that the next video will include more advanced explanations and discussions. On a side note, I have no idea why people marked your comment as spam. You gave criticism and an explanation yet people aren't happy with opposing views.

[sethconnell]

Probably one of the best explanations about something technical I've ever heard. Bravo!

[IstasPumaNevada]

How kind and helpful of you. Good thing you're around, otherwise people might think it's okay to ask questions.

[KHPandaZ]

This is my favourite presenter so far. Don't get me wrong, I've liked everyone but he just seems so enthusiastic about what he says. :)

[McLir]

I hope Computerphile also discusses fractal compression (and fractal interpolation) because the concepts are so frikkin' cool.
BTW, the key signatures in standard music notation can also be thought of as a compression scheme.
Thanks for the great stuff, Brady!

[nO_dNAL]

Great explanation. It's basically like factoring out an equation. All about efficient use of space

[TheTrueRandomness]

Wow, I really love Prof. Brailsford's style of explanation

[Galakyllz]

I'm glad to see this channel taking off. Great content, Brady.

[InterficioPupillus]

I can't help but think Brady must be one of the most interesting people ever to talk to on account of all the information and stories he hears during these videos.