detail information
| Posted by | Jan S. |
| Posted on | 21/05/05 21:49 |
Test Disc #3:
The third test disc is a Philips DVD+R9 DL 2.4x media:
--------------------------------------------------------------------------
Unique
Disc Identifier :
[DVD+R-DL:MKM-001-000]
--------------------------------------------------------------------------
Disc
& Book Type : [DVD+R DL] -
[DVD-ROM]
Manufacturer Name : [Mitsubishi
Kagaku Media]
Manufacturer ID :
[MKM]
Media Type ID :
[001]
Product Revision : [Not
Specified]
Disc Application Code : [General Purpose]
Recording
Speeds : [1x , 2.4x]
Blank Disc Capacity
: [4,173,824 Sectors = 8,152.0MB = 7.96GB
(8.55GB)]
--------------------------------------------------------------------------
**
INFO : Hex Dump Of 'Media Code'-Block Listed Below
** INFO : 4-Byte Header
Preceding 'Media Code'-Block Discarded
** INFO : Format 11h (Method 1) - ADIP
Information
0000 :
e0 0f 32 10 00 03 00 00 00 fc ff ff 00 22 d7 ff
..2.........."..
0010 : 00 00 00 4d 4b 4d 00
00 00 00 00 30 30 31 00 3c ...MKM.....001.<
0020 : 25 25
37 13 02 4d 69 02 4d 69 1f 1f 0a 0a 12 12
%7..Mi.Mi......
0030 : 02 01 01 1f 1f 0a 0a 12 12 02 01 01 00 00 00
00
................
--------------------------------------------------------------------------
[
DVD Identifier - http://DVD.Identifier.CDfreaks.com
]
--------------------------------------------------------------------------
AudioDev CATS test results:
Disc id: DVD+R DL PHILIPS
Disc Manufacturer ID: MKM
Analysis of CATS results:
The disc has a few parameters outside of the limits. First, the Reflectivity (R14H) of the first layer is everywhere lower than the standard (min 18%). The Bottom Jitter is consistently above 8% on both layers, with layer 0 being worse than layer 1. Finally, the Dropout Length (DOL) indicates a lack of HF signal on a few locations of the disc. This usually comes from some dusts on some disc areas, which during the burn are left unrecorded because the laser cannot reach the disc. However, although the disc exceeds the black spot limit defined in the DVD-ROM specification (300 um), this will probably be unnoticeable, since drives can handle defects of several millimeters without problem.
Our home-made test results:
Scanned with KProbe and Lite-On SHOW-1633S
Scanned with CD-speed and Philips DVDR1640P
|
Drive Info |
ID:1 PLEXTOR DVDR PX-712A V1.05 (#101824) | ||||||||||||||||||||||
|
Test Settings |
Read Speed: |
2X CLV | |||||||||||||||||||||
|
Test Interval Length: |
High Accuracy | ||||||||||||||||||||||
|
Test Result |
Disc Info: |
THREE_KINGS DVD-ROM, 8015 MB (THREE_KINGS) | |||||||||||||||||||||
| |||||||||||||||||||||||
|
Test Duration |
0:50:38 |
||||||||||||||||||||||
|
Drive Info |
ID:1 PLEXTOR DVDR PX-712A V1.05 (#101824) | ||
|
Test Settings |
Read Speed: |
2X CLV | |
|
Test Result |
Disc Info: |
THREE_KINGS DVD-ROM, 8015 MB (THREE_KINGS) | |
|
Test Duration |
1:00:32 |
||
Summary:
|
Comparison |
Average |
Max |
Average |
Max |
POF |
|
AudioDev |
33.3 |
107 |
0.4 |
8 |
0 |
|
Lite-On |
106.30 |
379 |
0.69 |
6 |
- |
|
Philips |
117.46 |
486 |
0.34 |
- |
0 |
|
Plextor |
43.11 |
930 |
- |
- |
0 |
CATS vs. drives results:
Both the CATS and our drives showed a big difference for errors between the first and second layer on this disc. And although all exceeding parameters were worse on the first layer, PI errors measured by the CATS are much higher on layer 1. The PI-sum level goes from less than 10 to an average of 250, yet the level of PIF stays very low, which means that the errors are very spread: this suggests that burning on the second layer has been consistently more difficult than burning on the first one, and that was not due to the disc but to the drive.
The jitter results are very surprising too: although the plot from the CATS shows little difference between the first and second layer, both the Philips and Plextor drives report a big jitter increase on layer 1. Moreover, consider the jitter and PI plots obtained with the PX-712 on the end of layer 1: at 75 minutes we see a maximum for the jitter, and this corresponds to a local minimum for the PI errors. This disc shows that not only jitter plots between CATS and drives can be very different, but also that jitter and errors are not always consistent.
Head over to the next page where we will have a look at test disc #4…
Test Disc #2
There´s a reason for standards and specifications. It doesn´t matter, that there are many drives which outperforme a 1996 standard DVD ROM drive, if the one you have to use somewhere else doesn´t.
It´s great, if my new burner handles even discs, which reflecting to the standard, are completly f* ->aehm<- messed up, but if my lame notebook drive or the SA DVD Player or the 5 year old installation DVD ROM in my server can´t, it doesn´t really help me.
The specifications and standards are well known and I´m pretty upset, that the manufacturers don´t give a sh*t. If future players can´t play today´s discs, the customer has to worry.
Feel that manufacturers are not doing the R&D, but rather foisting incompetent and unreliable technology onto the buying public - I have decided against going hard drive or Disc for my camcorder. Can only afford one in my lifetime, so am going backwards to DV tape.
I also know many people who are so confused and have heard negative things about new technology such as unrelaibility, incompatability, and lack of longevity- no to mention that with so many avenues to go down, sales people do not know a lot anymore and conflicting sales views confuse the public even more.
It is time that the retailers told the manufacturers - NO - give me products to sell that will please my constomers and I know of at least one major large shop that specialises in Entertainment systems that refuse to sell anybodies DVD recorders due to the problems aforementioned.
This technology has been released too early and the manufacturers do not even know enough so their help lines are often of little help or incorrect advice.
Furthermore to have your pics put onto disc at great cost (commerciallly) and then find that a few years after, some of those pics are lost with more degrading quickly over time- I htink that perhaps the old ghastly VHS tape may be better for longetivity especially with consumer copied material.
add a tag
