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01/09/2008 04:21:49 PM · #51 |
 Gordon, I agree... I don't think CD information (any digital information) can be degraded by time (meaning loosing quality) The thing is (as far as I know about computer language) it's linear read... one bit at a time, some cases even there are two or three dimentioanal readers (I think still in development to put more info in HDs and CDs) still linear lineup for computer to process any digital information. It happens so fast, no one knows if million things read the same time.
So, missing information will appear (in an image) as lines, broken color pixels, color disordering and black or white areas... anything like that but nothing like a video tape age. Video tapes analog, they are not linear... and they can degraded.
In Judi's theory, if I have an executable for any application (something simple like IrfanView install file) 10 years later if I try to install that program from a cd, program would run how? softer? sharper? no, would run as it was, but if anything missed, like a few bites, during the installation or running the program, it either going to crash, or give some sort of warning pop up for other reasons, since programs don't think there will be some "machine code error" in their body (well, developers know about it, but giving machine code error is not for regular Joe)
Logical? illogical? I think that's what it is. And besides me seeing the proof (in here) someone has to explain to me more and better for me to understand "Digital Degrading"
FP |
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01/09/2008 04:35:07 PM · #52 |
right - I've worked on a variety of implementations of JPEG algorithms. Software versions. Hardware versions. It doesn't work that way. Drop out or mis-read a few bits here and there and you'll get pretty dramatic issues with the decoding. Sharpness certainly isn't encoded in the format in a way that it would appear softer. Same with colour shifts like shown (which look like different colour profiles being applied somewhere in the display, or an sRGB palette being applied directly)
A damaged JPEG colour palette would be very psychedelic. A damaged JPEG image block would be dramatically damaged, even for a few bits.
RAW encoding is the same.
Either the original images were modified when being saved, the web site is changing profiles and sharpening, or the display software is modifying the files when re-reading them.
But this is certainly not the sort of damage that a CD will show after a few years (difficulties reading bits, unrecoverable files etc) |
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01/10/2008 05:39:20 AM · #53 |
Are you guys on iTunes? If so what's the title? Can't seem to find it.
Cheers |
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01/10/2008 06:10:03 AM · #54 |
| two40 the link to the podcast is in the first post of this thread, don't think it is listed on iTunes yet. |
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01/10/2008 06:12:47 AM · #55 |
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01/10/2008 06:21:31 AM · #56 |
| Ok thanks. I was hoping it was syndicated so I don't have to keep checking the site. Would be really nice to get this listed on iTunes for some more exposure and convenience. :) |
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01/11/2008 02:24:31 PM · #57 |
Bump to those who missed the opportunity to listen the new Podcast.
Also, signup for the forum. You can always put your suggestions there. I think soon many new stuff coming there as well, such as "Tip of the week sound clips" from some of the best photographers.
FP |
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01/11/2008 03:24:11 PM · #58 |
| Finaly got around to listening - thanks guys :) |
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01/11/2008 03:37:13 PM · #59 |
Leo I added a new Forum topics for you...
:-) |
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01/11/2008 03:39:11 PM · #60 |
Originally posted by thegrandwazoo:
Leo I added a new Forum topics for you...
:-) |
U R D Man :) |
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01/11/2008 03:44:13 PM · #61 |
| I also put up a poll on the home page so stop in and vote! |
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