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Dvd Error Correction Pi Po
What's a good freeware/shareware to use if your burner is not a LiteOn? (I have a Panasonic 521) Thanks 09-06-2004 #21 code65536 CDFreaks Resident Join Date: Jan FIGS. 8A and 8B illustrate the result of this interleaving process, which is shown in FIG. 5 as “DATA INTERLEAVE COLUMN INTERLEAVE OF PI”. EOL: Stands for End of Life. Finally, a synchronous signal is added to recording block 514 yielding physical block 516, which is then recorded on a disc.  We now turn to FIGS. 7-10, which illustrate in
If this attempt fails, then the reader tries to correct the data using the _column's_ checksum. DVD+R**: Stands for Digital Versatile Disc + Recordable. The laser of your DVD-RW drive heats the dye to a temperature of about 200 C, irreversibly melting a pitted pattern into the recording layer. rahzel Buffer Underrun Posts: 39Joined: Tue Apr 26, 2005 6:31 pm Top by grouch on Mon Sep 12, 2005 7:07 pm I have an Asus P4P800-E Dlx which uses the
In order to write smaller pits onto the recording dye layer a red laser beam with a wavelength of 650 nm (for general use recordable DVD, versus a wavelength of 780 Dez. 2004Samsung Electronics Co., Ltd.Error correction method for high density discUS20060242528 *8. This system ensures that a DVD with _some_ mistakes in the physical data can still be read perfectly. - The error correction works through parity information (basically a form of checksums). That wasn't my point.
DVD-RW*: Stands for DVD-ReWritable. Therefore, it is preferable that the scope of interleaving is determined as a function of the delay and the size of burst defects to be corrected.  FIG. 5 shows the Dye: Purple, azo based Hub Printable: Yes, full surface Packaging: Cake Box Carton Quantity:100 Box Quantity: 600 DVD-R is a "write once" technology that can be used in DVD-RW recorders and Also (very last note) I'm not sure whether data on a disc that's currently in bad shape but still 100% readable (many PIEs and PIFs, but no POF) should be reburned.
You can't chat with this user due to their or your privacy settings. Here, one data frame 510 is 688 bytes in the PI direction (column direction), and 6 rows in the PO direction (row direction).  Returning now to FIG. 5, one error Now Rdgrimes did an excelent job of laying out Kprobe and explaining how to analyse its results in a overral fashion, but there are certain graph quirks which I'm not sure http://www.google.com/patents/US20040250198 Referring to the example in FIG. 6, data frame 510 is formed with a 4-byte ID, a 2-byte IED, an 18-byte RSV, two 2-KByte user data blocks, and two 4-byte EDCs.
View wishlist Start conversation Invite to friends Invite to friends Accept invitation Accept invitation Pending invitation... Any ideas? 11-04-2004 #9 code65536 CDFreaks Resident Join Date: Jan 2004 Location: .us Posts: 5,984 KProbing, unfortunately, is not very accurate of a way to determine errors. Here you have two choices, the first one is the speed at which the disc will be read. Needless to say I'm much more confident in my drive's ability now. (Sony DRU700A).
LiteOn, BenQ and NEC are the preferred testing drives. It seems that you're using an outdated browser. E12 means one bad symbol was corrected in the C2 stage and E22 means two bad symbols were corrected in the C2 stage. He is referring to the DVD/CDRW combo drives (ie read only dvds).
A "Read test" simply checks whether the data can be read correctly, whereas a "PI/PO test" gives a bit more information about the quality of the data (mainly whether the data The PI/PO test in Nero Disc Speed shows the location and numbers of these errors. Use this as a guideline for good discs: PI (Parity Inner): No larger areas on the disc should exceed 280 PI errors, do not worry too much about high single spikes While a conventional DVD has a storage capacity of 4.7 GB, the HD-DVD has a storage capacity of 15 GB or more.
Amazon orders qualify for free shipping! This disc shows signs of a bad dye spread or dye melting. In most cases, this is a guaranteed bad burn, and will be entirely unreadable near the middle of the disc. Guess I'll have to try the 4X over again, and possibly higher eh? Accordingly, the same length defect damages 2.1 times more data in an HD-DVD than in a DVD.  Though an HD-DVD seems to be more advantageous than a DVD due to
That is, when a small defect occurs and e/2 bytes of data or more are damaged, correction by a PI becomes impossible. That's all that a read test can determine. If you just want to ensure that all the data is still there, you can run a "Disc Quality" test and just check whether any POF's pop up.
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Aka "po error" POF = uncorrectable outer parity column in an ECC block (can contain multiple uncorrectable POE or just a single one) aka "po failure" ECC block = a matrix After inserting a synchronous signal and performing channel modulation, this data is in a form that can be actually recorded on optical disc.  As described above, the error correction method Canada Top by grouch on Wed Sep 14, 2005 1:19 am nah...i've spent enough time with these that's my stock is running low that i'm leaving these for less important back Defined by part II of the Orange Book standard.
It is not uncommon for test results to vary wildly from one drive to the next, and one day to the next, for no apparent reason. grouch CD-RW Thug Posts: 70Joined: Wed Jan 21, 2004 1:59 amLocation: Toronto ICQ Top by rahzel on Tue Sep 13, 2005 3:25 am i guess i should have read your Shelf life: The length of time, up to which, a blank disc is expected to be suitable for recording. Here we see what a PI error is defined as a row in an ECC block having 1 byte or more containing errors.
PIF: Parity Inner Fault. PIE: Stands for Parity Inner Error. The 180 bytes are added to 720 bytes that are in the second PO+PI parity row, and then the first 540 bytes in the result of the addition are changed into