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PIF counts higher that PI in a BenQ DW1650 scan

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PIF counts higher that PI in a BenQ DW1650 scan

Postby MediumRare on Mon Feb 05, 2007 1:51 am

I was under the impression that the PI counts in BenQ quality scans included the PIF counts as well.

Here is a partial scan of a DVD+RW that contradicts this. The PIF levels are almost double the PI rate- so they cannot be included in the PI counts. (I did a partial scan because the counts rise at the end and obfuscate this information).

I checked older versions of CD Speed back to 3.50 and they all showed this behaviour.

Interestingly, the advanced quality scan differs: here the PIE values are higher than PIF.

G
Attachments
RW2_30_suse10_2@4x_qual_BCIC_8_detail.png
CD Speed quality scan (part of disc) with PIF > PI
RW2_30_suse10_2@4x_qual_BCIC_8_detail.png (20.47 KiB) Viewed 503 times
RW2_30_suse10_2@4x_adqual_BCIC_8detail.png
... the corresponding advanced quality scan
RW2_30_suse10_2@4x_adqual_BCIC_8detail.png (17.16 KiB) Viewed 497 times
RW2_30_suse10_2@4x_adqualsum_BCIC_8detail.png
... and the ad. quality summary.
RW2_30_suse10_2@4x_adqualsum_BCIC_8detail.png (5.26 KiB) Viewed 502 times
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Re: PIF counts higher that PI in a BenQ DW1650 scan

Postby DrageMester on Mon Feb 05, 2007 10:04 am

MediumRare wrote:I was under the impression that the PI counts in BenQ quality scans included the PIF counts as well.

Here is a partial scan of a DVD+RW that contradicts this. The PIF levels are almost double the PI rate- so they cannot be included in the PI counts. (I did a partial scan because the counts rise at the end and obfuscate this information).

I checked older versions of CD Speed back to 3.50 and they all showed this behaviour.

Interestingly, the advanced quality scan differs: here the PIE values are higher than PIF.
You are correct.

This isn't exactly new however, as this post by Erik Deppe over at CDFreaks will show.

In the Advanced Quality Scan the PIE is calculated correctly and includes PIF as described in this post at CDFreaks.
Pioneer DVR-112L, LiteOn SHM-165P6S, Pioneer DVR-111L, BenQ DW1655, Plextor PX-760A
LiteOn LH-20A1P, Optiarc AD-7203A, Matshita UJ-840S, Sony RDR-HX910, Sony RDR-HX750
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Postby MediumRare on Mon Feb 05, 2007 2:51 pm

I think I'm just plain overworked at the moment. :roll:

I knew that the BenQ did things differently than the LiteOn drives, but I mixed them up- I had a blackout yesterday when I did the scans. :oops: In fact, I have a special option in my display tool for KProbe and DVDScan results that will simulate the BenQ behaviour and display PI-PIF!

Sorry for the static here.

Incidentally, I follow the CD.speed discussion at CDFreaks regularly and had read the thread you linked to when it was active. Too bad Inertia isn't active any more.

G
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