huffman's Coding

[swapy]

I wondered before how guys would compress a 700mb file into 4mb file or
4gb windows os iso which i had was compressed in a 10mb archive

I googled a lot at last got that huffman coding was used
then i came to knw that all popular archivers use that coding.



BUT
main problem is how to make such archives ...
help ..........

[Fu Siyuan]

Not all files can be compressed to such small. Only high redundancy data have this possibility. Even the outdate WinZip(Deflate) is able to compress to 1/1000 most, however only on extremely high-redundancy file such as the same char repeated milion times.

But I still very doubt that if your observation is right. I don't think 4gb ISO can be compressed into 10mb.

The huffman coding is only a part of such technology. Actually arithmetic coding are used more now. The first document I read is RFC1951. I think it will suit you.

[swapy]

Not all files can be compressed to such small. Only high redundancy data have this possibility. Even the outdate WinZip(Deflate) is able to compress to 1/1000 most, however only on extremely high-redundancy file such as the same char repeated milion times.

But I still very doubt that if your observation is right. I don't think 4gb ISO can be compressed into 10mb.

The huffman coding is only a part of such technology. Actually arithmetic coding are used more now. The first document I read is RFC1951. I think it will suit you.

one of what i m saying is this
http://www.h33t.com/details.php?id=e...ee&hl=%2Bvista


http://www.h33t.com/details.php?id=e...&hl=%2Bwindows

[IsName]

To achieve such sizes, you must cut out almost everything from Vista.
I've seen also similar "release" of M$ Office on a floppy disk. And it was a fake.

[Black_Fox]

swapy, miracles don't happen in mathematics. 80MB version of Vista can be one of these possibilities:
- all files were zeroed out, so you get all files of correct size, but totally wrong content
- extremely slim edition (everything removed), so little will work there anyway
- cleverly covered malware/spyware/viruses

What it is surely, is license agreement violation.

[Skymmer]

Completely agree here but its interesting to see a proof-in-the-hands so I'm downloading it right now. Unfortunately the speed is extremely low - I was able to get only ~50% for 3 hours !