1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

C2 Error Reporting

Discussion in 'Audio' started by JNuber, Mar 20, 2003.

  1. JNuber

    JNuber Guest

    None of CDR/DVD drives report C2 errors. Is this something I can enable or is there some hardware/software shortfall? How important is this feature anyway? Drives in question are LG GCE-8520B, Yamahas CRW-F1, 6416s and Pioneer DVD-106S
     
  2. JNuber

    JNuber Guest

    ...none of (i)my(i) drives, that is...
     
  3. Shoey

    Shoey Guest

    The ability to correct c2 errors when extracting audio is VERY important. The LiteON LTD 163/165/166 dvd-roms all have the ability to correct c2 errors and produce superior dae quality, not to mention blazin fast dae speed.

    Shoey
     
    Last edited by a moderator: Mar 20, 2003
  4. cd-rw.org

    cd-rw.org Active member

    Joined:
    Jan 22, 2002
    Messages:
    1,426
    Likes Received:
    0
    Trophy Points:
    66
    Shoey,

    Actually most drives do not have accurate C2 error detection, so relying on it is less secure than using EAC's secure mode.

    This stuff is for the audio forum.
     
  5. Shoey

    Shoey Guest

    .

    I disagree. The 4 drives I've purchased in the last 2 years all have the ability to correct c2 errors.

    Shoey
     
  6. aldaco12

    aldaco12 Active member

    Joined:
    Nov 6, 2002
    Messages:
    2,544
    Likes Received:
    0
    Trophy Points:
    66
    Anyway, this discussion should be moved to the Audio forum (or forums will turn into a mess).

    (topic closed)
     
  7. cd-rw.org

    cd-rw.org Active member

    Joined:
    Jan 22, 2002
    Messages:
    1,426
    Likes Received:
    0
    Trophy Points:
    66
    Moved and re-opened.

    Many drives have C2 error reporting, yes. But hardly on hardly any drive does it work accurately. A lot of research has been done on C2 features of CD drives, especially by Andree Wiethoff (maker of EAC).
     
  8. JNuber

    JNuber Guest

    But what exactly do these errors tell us (and how)? In my last thread I asked if there was an article I could be pointed to. I'm not a boffin but I would like to know how to get the best out of my equipment, I'm that serious at least.
     
  9. Shoey

    Shoey Guest

    I don't dispute this fact, however, the abilty of a drive to correct c2 errors, especially dealing with scratched audio cd's does help.

    Shoey
     
  10. cd-rw.org

    cd-rw.org Active member

    Joined:
    Jan 22, 2002
    Messages:
    1,426
    Likes Received:
    0
    Trophy Points:
    66
    Error reporting to the software level and error correction are two totally different issues.
     
  11. Pio2001

    Pio2001 Moderator Staff Member

    Joined:
    Jan 20, 2002
    Messages:
    231
    Likes Received:
    0
    Trophy Points:
    26
    C2 error correction is performed by any drive, it is part of the basic Red Book specifications.

    What EAC deals with is drives capable to tell if the C2 error correction has failed or succeeded.

    From EAC's FAQ :
    Q:
    What is C2?
    A:
    On all CD-ROM media are at least two levels of error correction, called C1 and C2. If both fail, the output is probably not correct anymore. Most drives are not able to report if audio reads failed or not, so each block had to be read twice and be compared to make sure that everything is fine. But some newer drives are able to report if C1/C2 failed on specific samples on a read, making it possible to read only once and see if a read error occured. But there is still a problem, as some drives do not report these errors correctly, so you should test it thoroughly before trusting the results.
    ____________________________________

    An explanation of the two C2 checkboxes in EAC's drive options : http://www.digital-inn.de/showthread.php?threadid=15572

    You can test the C2 accuracy of your drive with the DAEQuality kit : http://www.exactaudiocopy.de/eac13.html

    But beware than the C2 accuracy itself can vary according to the testCD : http://www.digital-inn.de/showthread.php?threadid=14640#post60894

    There can be CIRC strategies more efficient than others to perform C2 error correction, that would perfectly fit your description, Shoey, but they are very little discussed. I made a webpage about their detection : http://perso.numericable.fr/laguill2/dae/dae.htm
    (Very advanced stuff...)

    Other links about C2 :
    http://www.digital-inn.de/showthread.php?threadid=15921
    http://www.digital-inn.de/showthread.php?threadid=14600
     
  12. Pio2001

    Pio2001 Moderator Staff Member

    Joined:
    Jan 20, 2002
    Messages:
    231
    Likes Received:
    0
    Trophy Points:
    26
  13. minix

    minix Member

    Joined:
    Jan 20, 2003
    Messages:
    82
    Likes Received:
    0
    Trophy Points:
    16
    I doubt very much that LG 52x can't report C2 errors. The LG32x, 40x and 48x are able to do it.
    Go to "Test Device" in Program Parameters menu in Feurio CD-Manager, and the drives features will be showed (C2 errors reporting, always according to drive: I mean the drive can lie).

    Enable "Report C2 errors" only in the C2-error-message tab in the "Special Parameters" menu of the drive.
    Try to rip a scratched CD in the CD-Manager at high speed and you'll get C2 errors. You'll have to disable "read index marks" probably...
     

Share This Page