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[Voodoocobra]

Just wondering what LPCM stands for.I know its the Audio format on some DVD'S.Why is it so huge opposed to Dolby 2.0 or Dolby 5.1?

[frankm]

Voodoocobra wrote: Just wondering what LPCM stands for.I know its the Audio format on some DVD'S.Why is it so huge opposed to Dolby 2.0 or Dolby 5.1?
Linear pulse code modulation

LPCM is uncompressed ... Dolby IS compressed

[guitard]

Basically, it's the same as the .wav files you find on a regular music CD - usually 1,536 kbits.

[BadassMOFO]

frankm wrote: Voodoocobra wrote: Just wondering what LPCM stands for.I know its the Audio format on some DVD'S.Why is it so huge opposed to Dolby 2.0 or Dolby 5.1?
Linear pulse code modulation

LPCM is uncompressed ... Dolby IS compressed
Are all of the dolby/dts formats compressed? If so that would make LPCM a superior sound would it not?

[frankm]

BadassMOFO wrote: frankm wrote: Voodoocobra wrote: Just wondering what LPCM stands for.I know its the Audio format on some DVD'S.Why is it so huge opposed to Dolby 2.0 or Dolby 5.1?
Linear pulse code modulation

LPCM is uncompressed ... Dolby IS compressed
Are all of the dolby/dts formats compressed? If so that would make LPCM a superior sound would it not?
As far as I'm aware yes, all Dolby/DTS are compressed and LPCM is superior.

[Voodoocobra]

It makes sense why its so huge if its uncompressed.Its a question that has puzzled me for a while.Also good to know that its superior quality.
Thx again. :thumb:

[ron]

frankm wrote: As far as I'm aware yes, all Dolby/DTS are compressed and LPCM is superior.
As far as I know, DTS is compressed using a different technology than DolbyDigital, and it also has a higher bit-rate than DD. Many people find a DTS track to be superior to DD. DD is the compressed audio standard though, as it is format that made it into the DVD specs.

[guitard]

My (very personal and subjective) opinion is that unless you're watching/listening to the show through a nice home entertainment center or with a hi-fi audio system, you're probably not going to be able to tell the difference between any of the various formats. And since LPCM takes up considerably more space than the others, I tend to think it isn't worth it for me because I just watch DVDs either on my computer or through a DVD player connected to a TV.

Having said that...I often do author shows with LPCM because it's easier to work with and authoring programs tend to not want to alter it in any way. Usually this is a case where I am only putting an hour or less on a disk so the bitrate for the video is still going to be somewhere in the 7-8K range.

[frankm]

guitard wrote: My (very personal and subjective) opinion is that unless you're watching/listening to the show through a nice home entertainment center or with a hi-fi audio system, you're probably not going to be able to tell the difference between any of the various formats. And since LPCM takes up considerably more space than the others, I tend to think it isn't worth it for me because I just watch DVDs either on my computer or through a DVD player connected to a TV.

Having said that...I often do author shows with LPCM because it's easier to work with and authoring programs tend to not want to alter it in any way. Usually this is a case where I am only putting an hour or less on a disk so the bitrate for the video is still going to be somewhere in the 7-8K range.
I understand what you are saying and when you are thinking about authoring those are excellent points. I also think about ripping the audio from DVDs. I ripped the audio from the Roger Waters DVD, In The Flesh, to put to CD to listen to in my car. In this case I was looking at either ripping the LPCM track or the DTS track (I believe those were the choices, this was some time ago that I did this). Ripping the LPCM track had a couple of advantages. First I didn't have to do the same conversion as with the AC3 track and second it would have better sound. I know I was primarily going to use the CDs in my car but I also might listen to them on my home stereo or PC at work (headphones) or whatever. If you are ripping from a DVD to burn to CD, I'd go with the LPCM if it is available, everytime. Authoring, though, I agree with you.

[Ryder5150]

frankm wrote: BadassMOFO wrote: frankm wrote: Voodoocobra wrote: Just wondering what LPCM stands for.I know its the Audio format on some DVD'S.Why is it so huge opposed to Dolby 2.0 or Dolby 5.1?
Linear pulse code modulation

LPCM is uncompressed ... Dolby IS compressed
Are all of the dolby/dts formats compressed? If so that would make LPCM a superior sound would it not?
As far as I'm aware yes, all Dolby/DTS are compressed and LPCM is superior.

I think you're right. When I watch a blu ray dvd I can select uncompressed audio or dolby/dts, and the uncompressed audio sounds meatier.

[radikal]

frankm wrote: guitard wrote: My (very personal and subjective) opinion is that unless you're watching/listening to the show through a nice home entertainment center or with a hi-fi audio system, you're probably not going to be able to tell the difference between any of the various formats. And since LPCM takes up considerably more space than the others, I tend to think it isn't worth it for me because I just watch DVDs either on my computer or through a DVD player connected to a TV.

Having said that...I often do author shows with LPCM because it's easier to work with and authoring programs tend to not want to alter it in any way. Usually this is a case where I am only putting an hour or less on a disk so the bitrate for the video is still going to be somewhere in the 7-8K range.
I understand what you are saying and when you are thinking about authoring those are excellent points. I also think about ripping the audio from DVDs. I ripped the audio from the Roger Waters DVD, In The Flesh, to put to CD to listen to in my car. In this case I was looking at either ripping the LPCM track or the DTS track (I believe those were the choices, this was some time ago that I did this). Ripping the LPCM track had a couple of advantages. First I didn't have to do the same conversion as with the AC3 track and second it would have better sound. I know I was primarily going to use the CDs in my car but I also might listen to them on my home stereo or PC at work (headphones) or whatever. If you are ripping from a DVD to burn to CD, I'd go with the LPCM if it is available, everytime. Authoring, though, I agree with you.

As usual these are all awesome points from the best gurus in the Audio/Video authoring etc.. :cool:

Frank That Roger Waters DVD I find is one of the best ever Shows captured....I watch it alll the time but havent yet ripped audio for my listening pleasures in my car but this woke me up to do it...lol :thumb:

That Shine On Crazy Diamond intro is awesome :eek: :cool:

What ripping tool is best to achieve best audio rip from DVD??

Thx

[frankm]

radikal wrote: What ripping tool is best to achieve best audio rip from DVD?
Like many things, there is easily a dozen different ways to do it.

I usually rip the VOB files via DVD Decrypter and the demux the files via Smartripper. These steps could be combined into one step and people have said just use Decrypter to do the demux but I personally rather have the steps separated so if something goes wrong it can be isolated. Also I can stop between steps if need be. Anyway, after the demux there are a couple different files most of which can be discarded but the one to be most concerned with is the AC3 or LPCM (I think the LPCM is sometimes a WAV right away). If the file is AC3, I use a program called HeadAche to convert the AC3 to WAV. Then I load the WAV into EAC to create the CUE Sheet and burn.

There is also a program from a company call IMToo (I think) that will extract the audio from a DVD to WAV or MP3 but I rarely use that. Actually I have been meaning to do more research on it. The main reason I don't use it that much is I'm not certain what process it is using to extract and decode the audio whereas with my other process I know exactly what is going on.

I'll do some additional reading and PM you later.

Oh, and you are right about the Roger Waters DVD. It is just plain awesome. :thumb:

EDIT:

Here was another discussion on the topic ...

http://www.vhtrading.com/forums/viewtopic.php?t=16864

... it reminded me of one of my concerns, I don't know if IMToo is using my soundcard or not, I don't think it is but I need to know more about what it is doing to feel comfortable about it. Then again I'm not sharing these it is just for me so maybe I shouldn't care that much. Oh, well, if I run across more information I'll pass it along.

Yet Another EDIT:

This is the tutorial I started out with and modified it to my own liking ...

http://www.glump.net/dokuwiki/howto/audio_only_dvd_ripping_guide

... it seems much more confusing than it really is. Pretty simple. As I noted earlier. I use Decrypter to rip the VOBs and SmartRipper to demux then I have my AC3 or my LPCM.

[radikal]

Awesome Frank..Thx for your help :D
BTW cant we just rip and Demux in 1 shot with smart Ripper???

Thx

GUy

[dokkendude]

In dvd decrypter in IFO mode you can just demux the audio

[frankm]

radikal wrote: BTW cant we just rip and Demux in 1 shot with smart Ripper?
Yeah, you can Demux directly in Smartripper or in Decrypter. Personally I like to do the steps individually. I rip with Decrypter and make certain I have a good rip. Now I know any potential issues will not come out of the ripping process. Then I fire up Smartripper and Demux the files I have on my hard drive (again I know the rip was good so now I'm just watching for any potential issues in the Demux). Once I have the files in their elemental streams I can go about working with them again I have watch the prior two steps for issues and know there have been no issues thus far. The final step is editing the WAV file into CD pieces (usually two large WAV files) and creating the CUE Sheet (these steps can be done in EAC but other programs can do it as well). The burn the CDR and take it out to the car and listen to it as you drive to work or whatever. I may be going a little overboard and I may be paranoid but that's the way I typically do it. I am going to investigate that IMToo program more because it does intrigue me, I just don't know enough about what it is doing to trust it.

Actually since I have received my iPod I have sometimes taken my large WAV file and after creating a CUE Sheet split it into smaller WAV files and then converted (via dbPowerAmp) to M4A and loaded on my iPod. I have a couple full length concerts without any fades on my iPod. Of couse I could just take the DVD and rip it to the M4V and load the video on my iPod but the audio only has its advantages. But that's a whole other conversation.