DPL II in latest release - why would encoding be affected ?

[waldok]

Hi,

I don't know if this belongs here (mods, please feel free to move it otherwise) but there is something I don't understand. If it has already been explained, sorry, please just point me to the appropriate threads, I couldn't find the answer using the search.)
In the "heeelp" thread by DVD2SVCD, some guys refer to the DPLII option. As far as I know, Dolby ProLogic II is an algorithm that is applied to a stereo or DPL I source and that will create from this source two fake distinct rear channels, thus simulating a truly encoded multichannel sound. I have an Onkyo amplifier that does this job, and it really is effective on old stereo or DPL VHS movies. Almost sound like 5.1 sometimes.

Now how would the encoding with DVD2SVCD be able to do something special about DPLII when it's only a decoding algorithm ? As far as I know, there is no "DPLII encoding" just like Dolby Digital 5.1 encoding. The channel separation in DPL II is purely "artificial" and recreated at playback time. So what does DVD2SVCD exactly do about this at encoding time ?

I'd like some expert around to explain me. Is it related to "preparing" the audio tracks so that they can take the maximum advantage of later DPLII decoding ?

Please help me on this one cause I really don't understand.

Waldok :cool: but :confused:

[markrb]

Pay particular attention to the thread about 5 down by UX-3.

http://forum.doom9.org/search.php?s=&action=showresults&searchid=369828&sortby=lastpost&sortorder=descending

Mark

PS sorry I had to edit the typo. It was bugging me.

[waldok]

No prob mark, I know since the "..." discussion we had that you are some kind of "perfectionnist":D

I promise I'll take my snow-gloves off before my next post... (<- noticed this one ?)

Thanks for pointing me to the thread.

Waldok :cool:

[waldok]

Mark, let me rephrase this :
THanx a lot for pointing me to this very interesting thread.
That's exactly the information I needed to understand how encoding could take into account that DPLII was meant to be used at decoding time.

You are the man !

Thanks again (and of course thanks to all the ones who provided information in the thread)

I'll now get another beer.

Waldok:cool: