How File Compression Works

In this video I cover how file compression works

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[apexshinbi]

just put your hard drive in a hydraulic press

[SpasmGazm]

Huffman encoding: the cat has ten million hairs, four legs, two ears, two eyes. Here's a tree with all the parts necessary and this string is the instruction to reassemble it.

[SomeNot]

Compression is really quite incredible. I had a high resolution heic image and it was only around 70MB. I exported it as a tiff and it was almost 500MB

[francescomazzucco]

"In some rural areas you still can't stream 4k video" In entire countries man, entire countries

[Zonno]

loving the thumbnail buddy. keep it up!

[Wol]

I genuinely appreciate how you explain concepts with clarity and entertainment. You’re one of the better sources for understanding tech concepts.

[mjmjmjmj]

1:27 “whereas the lossless one clearly there is some information lost” just wanted to point it out

[EpicTyphlosionTV]

Nobody:
Torrents: **Puts a .zip in a .zip in a .zip... in a .zip**

[idontbelieveinchristmas]

Jpeg's use the discrete cosine Fourier transform for all you math nerds

[connor_santoyo]

JPEG XL is an upcoming compression method that will solve most of our problems with image files. It has a lossy mode that is way smaller than JPEG. It has a lossless mode that is smaller than PNG. And has support for all the kinds of metadata that you could want, including high color depth.

[Phantom_Boi]

Lossless
“As you can see some of the information has been lost”
Wait w h a t ?

[janosfeher]

This is the first time I see the XP background in wide aspect ratio. Didn't even know there are other hills in the background.

[spazmaster]

do I *look* like I know what a jay-peg is? I just want a picture of a god-dang hot dog

[jansustar]

another thing with compression:
images;
when the area has a slight deviation in color but still enough to look weird if it is all the same color; instead of storing all the 24 bits to get 255:255:255 color, you can just take a pixel and relate all other similar colors to it. so if there is barely any difference, you can express that in far fewer bits.

and about text
you can overlap selection.
so the phrase
Harry Potter and the philosopher's stone
contains several frequent words, that you don't need to repeat

[MAmerica]

Another interesting form of compression is huffman coding. The jist of how that works is that it orders the different characters by order of probability of occurrence of a file on a binary tree, then it uses its placement on the tree as a stand in for its value. The effect is reduced number of bits for common characters at the cost of extra number of bits for less-used ones. A very cool technique and is very complimentary with other compression algorithms, and is also used commonly over channels.

[aidang]

i don’t understand anything about your content but i like your personality and you’re funny so im going to sub

[TheSteveTheDragon]

KGB: Throws cat into the garbage compressor.

[afallingtree]

its almost impossible to tell the difference between the side-by-side images on my crappy rural connection

[chromacat]

"Whoops, didn't mean to delete everything there."

[adithyarathnayake]

Yo I just want u to know I appreciate u so much man. I started studying computer engineering at a uni and the lectures just made me loose all most all interest I had in CE. But ur the guy who bought back my passion. Thanks G.