The following form shows the formats,encoding parameters,actrual biterates & relative entropies which (might?) have relation to the sound quality

http://we.pcinlife.com/attachments/forumid...4HQ75KVUeuE.png
http://we.pcinlife.com/attachments/forumid...OhUm6bNmOaX.gif

edit by staff: IMG -> URL, and please, english is the language here.

Relative entropy??

Looks like I'll be spending the night re-encoding my entire collection to "all preset insane -k" as it's relative entropy surpasses that of lossless.

Great colors BTW!

Maybe u can simply comprehend it as: a measurement of sound quality, which is based on how much infomation the coded file has,instead of how little its distortion is,etc


and Remedial Sound:

the insane -k 's frequency coverage is even wider than the original file

how do you measure the entropy?
a compressed file surley has a higher entropy because it's more "surprising" than the former.
a highly correlated message has greater probabilities of events and contains less "information"

But this doesn't take into account how our ears work, which is exploited by lossy codecs, surely?

And how does higher frequency coverage equate to higher sound quality than the original?

i can just say that every measuring method has its advantages & disavanteges. here i also have a result simply based on distortion of different formats, in which MP3 owns most balanced & small distortion. but someone would say to me that masking effect of our ears is the most important & not simply the distortion

Click here to view the result.

A file containing nothing but random values should have the highest entropy of all. I wonder how that would sound?

Wenheng, which program is that you used there to perform those measures, the distortion measures, not the entropy figures ?

Sorry, but comparing audio formats based on RMAA results is quite pointless.

I want, even, to know what entropy he's calculating, and why it's relevant.

Now, if it was:

Johnston, J. D., “Estimation of perceptual entropy using noise masking criteria,” ICASSP '88 Record, 1988, pp. 2524-2527

Hmmm..... all I can say is that ears and graphs are not the same