Those are just to give you an idea of what people go for when they burn. Anything worse than what you see above indicates a sub par burn, and you already have an example of discs that are pretty much a coaster.
…and while each quote agrees on average LDC being less than 13 for a good disc, when it comes to the maximum BIS value you’d want, I’d say you want to avoid a disc with a bunch of spikes of height 15, or clumps of BIS that reach up to 8, to avoid a mediocre burn. The BIS is much more important than LDC. So in the case of the mediocre burns, you see one disc with a clump of BIS values around 5 or 6, which is okay; on the other mediocre disc, you see it spikes up to 11, and clearly has a hump in the middle that reaches somewhere in the 6 to 8 range – still within spec, but not as good. [But also notice that the actual average is still fairly low in comparison; this is a result of the way the data is displayed, crammed into one window, so if you have a high average BIS paired with a high maximum BIS, the disc is probably pretty poor].
Anyway, which BDR drive are you using?[/QUOTE]
There doesn’t appear to be an agreed standard for what values constitute a good BD disc, at least not when scanned with consumer drives. Then reviews on Myce only mention the official specification which is for discs scanned with much more sophisticated equipment.
Erik Deppe writes in the Opti Drive control manual that “On a good disc the average LDC should stay below 13 and BIS should stay below 15.”
A German computer magazine, c’t, said “for a quality BD-R burn, the average LDC should stay below 13 and the maximum BIS should not exceed 8”.
But discs can exceed these limits by a considerable margin and still be perfectly readable.
A very useful test is the ‘transfer rate test’. If a disc cannot be read without slowing down then it is definitely substandard (or the drive performing the test is a really bad reader).[/QUOTE]
Thank you both very kindly for a very in-depth reply and good burn illustrations. I must say I have learned SO much in the last 24 hours. Had I known all the exhaustive tests you guys put Blank Media up for, back when I put in the order for these Optical Quantum BDR discs, I would’ve thought twice and gone with a more expensive but less troublesome route.
First things first, in response to both you guys, the drive used to burn the BDRs initially was a LiteOn iHBS112 on a 2010 Mac Pro using the Toast Titanium 14 app (I am a Mac guy with limited access to Windows machines).
For playback I use a Windows HTPC machine with an LG BDROM drive UH12NS30. It is in the family room and is not conducive to serve as a media station. The drive doesn’t do Disc Quality tests, so I used an external Buffalo BDXL burner to try that. Those results above are from the Buffalo BDXL.
All last night I was up throwing previous burns to the test. Here’s what I found, pardon me if it is common knowledge.
[li] Verbatim 50GB BDR DL HTL Media I got from Amazon ($130 for 50) showed the best LDC and BIS levels. Like 5 for the former, and 0.9 for BIS. I burned these without any care for the speeds etc on the iHBS112.[/li][li] Putting a paper label on the disc murdered the thing. The example above was from a paper labeled disc. The paper label was from Meritline, and wow, nearly all BDRs I put a paper label on, had horrible LDC and BIS levels.[/li][li] I tried a few comparative burns on Toast Titanium 14 on Mac and IMGBURN on Windows on the PHILIPSR04-000 media (Optical Quantum), and the LDC/BIS on Mac was nearly always twice the values from an IMGBURN burn. Both burns were accomplished with the media rated burn speed (never auto again), with no extraneous processes running on both machines.[/li][/ul]
What I take away from this is that I need to get better media (d-uh), and never put any paper (full face) labels on the discs. Unfortunately, using IMGBURN is not an option for me on a day-to-day basis (primary machine = Mac), but I must burn exactly at the rated speed, or at speeds determined by tests here on the forum for the media/burner.
Thank you guys again! I am on the hunt for good media, Melody is on its way from Amazon, and should that work out well, I will venture forth for Falcon/FTI as well.