Home News Reviews Forums Shop


What's wrong with this Plextool Scan (PIE SUM8)

DVD-R/W, DVD+R/RW, DVD-RAM

What's wrong with this Plextool Scan (PIE SUM8)

Postby Halc on Tue May 17, 2005 11:33 am

Take a look at this graph (particularly the graph and the status area average):

http://www21.brinkster.com/roina/nec_nd-3540_8x_ritek_dvd-r_8x_g05_plextor_px-716_sum8_hi.png

Anything odd?
Last edited by Halc on Wed May 18, 2005 2:22 am, edited 1 time in total.
User avatar
Halc
CD-RW Player
 
Posts: 599
Joined: Mon Feb 04, 2002 9:13 am

Postby dolphinius_rex on Tue May 17, 2005 12:41 pm

Hrm... it's a little red x in a box... that's pretty odd I think :wink:
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R

The Progression of Computer Media
User avatar
dolphinius_rex
CD-RW Player
 
Posts: 6923
Joined: Fri Jan 31, 2003 6:14 pm
Location: Vancouver B.C. Canada

Postby Halc on Tue May 17, 2005 1:52 pm

Well, look at the graph.

What's the lowest PIE figure? 60+ something?

What's the PIE average in the Test Result window? 11.01

Does not compute, unless the graph is drawn based on maxima alone and there is a lot of minima being ignored for the graph.

I don't understand how the average can be so low, if the graph is right (or how the graph can be so high, if the average is right).

Also, I'm not sure I've stated this before, but for the speed Plextools scans at, I'm still stupefied that they _still_ have not adapted true floating SUM8 window as per specification requirements. They are reading and graphing consecutive SUM8 block samples.

<sigh>

Time to start trying PxScan....
User avatar
Halc
CD-RW Player
 
Posts: 599
Joined: Mon Feb 04, 2002 9:13 am

Postby MediumRare on Tue May 17, 2005 2:04 pm

Halc: this is what we see until we explicitly open the image: Image

Halc wrote:Does not compute, unless the graph is drawn based on maxima alone and there is a lot of minima being ignored for the graph.

I think that is the case- the graph shows the maximum value in each sampling bin (pixel) - one of the reasons alexnoe developed pxscan.

CD-Speed goes the other direction: it bases the average on the the displayed values (and samples for the display like PlexTools). This means that scans with the same length and same PIE count can have "average" values differing by factors of 2 or more (depending on the distribution of the errors in the displayed sample bins).

G
User avatar
MediumRare
CD-RW Translator
 
Posts: 1768
Joined: Sun Jan 19, 2003 3:08 pm
Location: ffm

Postby dolphinius_rex on Tue May 17, 2005 3:19 pm

Ahh, now I can see the picture... once I copy and paste the address into a browser! :o

I don't think it's out of the ordinary. I think the software is not showing the accounts of '0' PIE which will offset the overall average, even when there are large PIE values as well.
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R

The Progression of Computer Media
User avatar
dolphinius_rex
CD-RW Player
 
Posts: 6923
Joined: Fri Jan 31, 2003 6:14 pm
Location: Vancouver B.C. Canada

Postby Halc on Wed May 18, 2005 2:21 am

Sorry for the image hosting problem. Didn't understand it right away from Dolph's post, sorry :) [Edited to a link now]

I think the way Plextools graphs is brain dead. It has not statistical logic at all, at least in all the statistically accurate graphs I've seen in my life so far :)

Ah, well. Back to work.
Last edited by Halc on Wed May 18, 2005 8:05 am, edited 1 time in total.
User avatar
Halc
CD-RW Player
 
Posts: 599
Joined: Mon Feb 04, 2002 9:13 am

Postby dodecahedron on Wed May 18, 2005 2:37 am

Halc wrote:Sorry for the image hosting problem. Didn't understand it right away from Dolph's post, sorry :) [Edited to a link now]

clicking the link i get:
The image “http://www21.brinkster.com/roina/nec_nd-3540_8x_ritek_dvd-r_8x_g05_plextor_px-716_sum8_hi.png” cannot be displayed, because it contains errors.

strangely, before i did see the pic!

FYI, your avatar isn't showing either.
it's like Image
also, in the past i would occasionally get a small warning icon in the IE status bar about cookies being blocked when loading a forum page, and the URL that was causing the warning was your avatar!
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby Halc on Wed May 18, 2005 8:05 am

Thanks for the info. I had no idea about this. I haven't had any problems with brinkster before, but no it seems there are plenty. Also, I didn't know they are feeding cookies to even people looking at images from their hosting servers.

Weird :)
User avatar
Halc
CD-RW Player
 
Posts: 599
Joined: Mon Feb 04, 2002 9:13 am

Postby dodecahedron on Wed May 18, 2005 8:07 am

what do you know...now i do see your avatar!
weird go figure.
and that cookie thing in IE that was on and off as well.

EDIT: and now (3 hours later) i don't! :o #-o
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
-- JRRT
M.C. Escher - Reptilien
User avatar
dodecahedron
DVD Polygon
 
Posts: 6865
Joined: Sat Mar 09, 2002 12:04 am
Location: Israel

Postby Muchin on Tue May 24, 2005 2:19 pm

Halc wrote:Well, look at the graph.

What's the lowest PIE figure? 60+ something?

What's the PIE average in the Test Result window? 11.01

Does not compute, unless the graph is drawn based on maxima alone and there is a lot of minima being ignored for the graph.

I don't understand how the average can be so low, if the graph is right (or how the graph can be so high, if the average is right).

Also, I'm not sure I've stated this before, but for the speed Plextools scans at, I'm still stupefied that they _still_ have not adapted true floating SUM8 window as per specification requirements. They are reading and graphing consecutive SUM8 block samples.

<sigh>

Time to start trying PxScan....
The PIE averages were erroneously calculated as SUM1 by Plextools. PxScan is correct in the calculation.
Muchin
Buffer Underrun
 
Posts: 33
Joined: Sun Apr 10, 2005 2:12 pm
Location: Formosa


Return to DVD Writers

Who is online

Users browsing this forum: No registered users and 1 guest

cron
All Content is Copyright (c) 2001-2017 CDRLabs Inc.