[Ffmpeg-cvslog] CVS: ffmpeg Changelog,1.58,1.59

[Mike Melanson]

Rich Felker wrote:
> On Thu, Dec 29, 2005 at 09:05:32PM +0100, Erik Slagter wrote:
> 
>>On Thu, 2005-12-29 at 18:07 +0100, Michael Niedermayer wrote:
>>
>>
>>>big note: lossless jpeg and jpeg ls are 2 different standards! both are
>>>lossless ...
>>
>>BTW how does all of this relate to jpeg with 100% quality? Isn't that
>>lossless?
> 
> 
> No. The DCT isn't even specified in a bitexact way so there's no way
> it can be lossless.

	So can someone provide a 50-words-or-less summary of how lossless JPEG 
works? (Michael: Blog post. :) ) Does it involve DCT or some other 
method for primary compression? How does its compression rate against, 
e.g., PNG?

-- 
	-Mike Melanson