Originally posted by Marco BTC
We’re studying this issue and thinking about implementing it in a future firmware.
In the meantime, I’d appreciate if you can give us some more information about how useful this feature is, which home DVD players definitely need it to play movies normally, and any other useful resources on the web about this feature.
Thanks in advance !
BTC Europe Support [/B]
I suggest you take a look in the DVD Player database at http://www.dvdrhelp.com/dvdplayers
The database includes user reports of more than 1.000 different DVD players.
The usefullness of this feature should be quite obvious. It will allow DVD+R media to be played back in “older” DVD players by fooling the player into thinking that the media is a pressed DVD-VIDEO (DVD-ROM).
Most new DVD players will of course recognize the DVD+R media since the +R format itself is no longer new. As you might recall DVD+RW was introduced before DVD+R so most players will have no problems reading DVD+RW media - unless the player is really old of course. However all players will playback DVD+R and DVD+RW media if the booktype/bitsetting is set to DVD-ROM. Most 2. generation DVD+ writers (which were able to write both DVD+RW and DVD+R) were produced by Ricoh. Since Ricoh knew that DVD+R would cause compatibility problems with thousands of DVD players all over the world they implemented a feature in their firmware that would allow you to change the bitsetting for DVD+R and DVD+RW to DVD-ROM. HP (which were selling OEM Ricoh drives) chosed another approach by releasing a firmware where the booktype for DVD+R was hardcoded to DVD-ROM. NEC did the same with their ND-1100 writer.
So this whole bitsetting issue is only wanted for compatibility reasons - and should be implemented in all DVD+ burners.
There is however an obvious/peculiar sideeffect of changing bitsetting to DVD-ROM. Just take a look at the specs of the 1004IM drive:
DVD+/-R, DVD+/-RW) max. 6x
DVD-ROM max. 12x
Can you spot it? Yes, a burned DVD+ media with the bitsetting set to DVD-ROM will also fool the burner (or at least a DVD-ROM drive) into believing that the media should be read back at max 12X instead of max 6X. If the media is of high quality this is not a problem. On the contrary if the media is of very low quality (PRINCO anyone?) this might not be usefull at all.