ISO Mode 1 instead of Mode 2/XA?

[pibble]

Hi all.

I've been having some quality problems with my (S)VCDs towards the end of the discs on my Pioneer DV-343 DVD player. I make great looking SVCD's, but in the last few minutes of each disk I tend to have significant glitches, and the audio can get out of sync as well, pretty much making it unwatchable.

I'm not sure if it's the player, the media, the burner, or what. There are so many factors, I know. I've tried a variety of media, most with the same problem to one degree or another. I'm mainly using Memorex Black 80 min CDRs. The problems are always at the end of the disc, in the last few minutes, and I am NOT overburning.

I had one idea to try to improve the image quality (figuring that the glitches result from too many data read errors.) Why not burn in ISO Mode 1 with error correction (like a regular CDROM.) Sure, you give up a bit of storage space (less than 10% I think) but for me, the tradeoff would be worth it for a glitch-free viewing experience.

The problem is I can't find any references to anyone ever doing this. Is it possible? I know the SVCD/VCD specs call for the video tracks to be Mode 2/XA without error correction, for the benefit of additional space. But my Pioneer DV-343 is a pretty flexible player. It plays XVCDs up to 2600kbps, it handles 48khz audio fine, and it handles CDRW. So I figure why not try it?

Only I can't seem to make Nero allow me to change the mode in the Filesystem tab. And I tried VCD Imager too, but I can't see a way in the docs to force a MODE1 image to be generated.

Has anyone ever tried this before, or have any other thoughts on reducing media glitches?

[Jeomite]

VCD and SVCD standards are Mode 2/XA. It cannot be altered, it's like trying to burn an Audio CD in Mode 1, you can't. =|

What's this Mode 1 Error Correction? I never heard of this.. ? =|

[stanwebber]

i had problems burning past 78min until i upgraded the firmware on an older sony drive

[vitualis]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-10-21 17:35:00, Jeomite wrote:
VCD and SVCD standards are Mode 2/XA. It cannot be altered, it's like trying to burn an Audio CD in Mode 1, you can't. =|

What's this Mode 1 Error Correction? I never heard of this.. ? =|
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

The raw capacity of a sector on a CD (75 sectors per second) is 2352 bytes. If you do the maths, that's about 747 MB of raw capacity per 74min/650MB CD.

Now, for MODE1 or MODE2 Form1 (ordinary CD-ROMs), you have 2048 bytes per sector available as user data. The rest of the space is taken up by error correction codes, error detection codes and other things. This is why you only have 650MB of user space available on a 74min CD (for a CD-ROM).

The video tracks on a S/VCD are in MODE2 Form2 and you have 2324 bytes per sector available for user data.

Regards.

[pibble]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-10-22 01:47:50, stanwebber wrote:
i had problems burning past 78min until i upgraded the firmware on an older sony drive
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

Thanks for the Suggestion. Unfortunately my Yamaha 6416SZ is already at the latest firmware revision....