lpcm question please clear me up...??

[Ekin]

ok..I just got a DVD with lpcm 2.0 1536kbps. So I have a few question to ask. So can somebody clear me up.

1. is lpcm audio file the same as .wav file that I decoded a vob file using DVD2AVI ???

2. I noticed that lpcm audio file sounds wayy better than ac3. So what's the different between lpcm and ac3 ? well lpcm is better quality. So is lpcm better in size ?? because ac3 is compress that's why it's less quality ??

3. How do i make lpcm audio for my dvd ? Lets say I have a vob with ac3. So what if i decode it to .wav and then some how convert to lpcm. So that I can improve my audio file ???

4. Is lpcm plays on all desktop player ??


P.S. just a quick question about buttons. On this DVD...i see that the buttons for the menu is like 2d. It's like a bar with white text on top. But when hightlighted...the bar becomes kinda 3d..it pops up looks like a button and the text turns yellow..I know how the text works..but how does the bar pops up like that ?? does that mean they're using the "auto-action" command so that another menu would pop up with the 3d buttons ??

[frodoontop]

I think you mean a DTS-track on DVD.
1)To demux a DTS-track you have to use a special version of DVD2AVI or directly demux it via Smartripper for instance. I think your .wav-file is simply transcoded from .ac3, because so far only Hypercube made a program who could transcode a DTS-track.
2)DTS is much less compressed, thus sounds better.
3)Here counts the rule garbage in, garbage out. You can't improve your sound by changing to another format.
4)Powerdvd can play a DTS-track by itself, for others I don't know

[Ekin]

Hi there, thank you for reply. But to tell you the truth I've never dealt with DTS or lpcm. But when I play that DVD with PowerDVD, it said lpcm for the audio format. So I don't know if it's DTS or not.....The DVD that i have right now is a music karaoke DVD, and it has lpcm audio"according to PowerDVd". But it's a mixture of songs from other music DVD. I know that for a fact. Because I have the original DVD and the audio is in ac3. I bought this DVD and i just noticed that the same song that was on the original DVD-9. Now is on a DVD-5 with better sound quality as lpcm. But the video is less quality. So I know they reduce the video. And I guess they have to decode the ac3 into .wav and then somehow get it to lpcm ?? Do you know how they did it ??

[dhv]

LPCM is uncompressed audio, the same as in wav file, or Audio-CD. You can open LPCM file with audio editor (CoolEdit for example). In open dialog enter 16 bit, 48kHz, stereo, Motorolla format. After that you can save it as wav, or do what you want.
For demuxing use DVDdercrypter (enable stream processing, demux)

DTS is completely different format, compressed, multichannel.

[Ekin]

ohh really...so LPCM is like Wav...so you're saying that, if i want i can use wav as my audio for my audio?? And it will be better quality than ac3 ??

So if LPCM/wav is not the same as DTS...so which one is better ? Which one is better in file size, quality ??? Which one is better to use for DVD audio ??