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Thursday 12.3.2026 / 03:51
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afterdawn.com > forums > dvd±r discussion > dvd±r for newbies > how is audio encoded on a dvd?
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How is audio encoded on a DVD?
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Room101
Newbie
_ 		2. August 2005 @ 23:37 _ Link to this message    Send private message to this user   
Hi.

Things I know.

1 - CD audio is not compressed. When you rip a track from a CD you create (either physically or virtually) a WAV format file.

2 - My MP3 files are on average about 1/12 the size of the original WAV file.

3 - DVDs can hold a LOT of files!

4 - My DVD player cannot play MP3 files or DVDs based on a file system - only real DVDs and DVD+/-Rs.


Things I think I know.

1 - MP3 is something to do with the way audio is encoded into a video for DVD.

2 - A DVD with JUST audio (and maybe a few simple menus and / or album cover scans) SHOULD be able to hold a LOT of audio!

3 - A DVD with JUST audio and a DVD player with a track shuffle would make a GREAT jukebox!

4 - I am NOT talking about DVD-Audio. This is the new(-ish) format for encoding high quality surround sound onto a DVD sized disk. Requires speclialised hardware to reproduce it.


Thoughts

If a single layer DVD can hold 4.7GB of data and if this data was MP3 files, then, theoguessingly

4.7GB * 12 (factor of MP3->WAV) => 56.4G of WAV files.

1s of WAV is 176400 bytes (44100 sample rate, 2 channels, 16 bits).

So, 4.7G of MP3s is possibly 319728s of WAV.

5,329 minutes.

88 hours.

3.7 days!!!!


Question

Is it actually possible to put compressed audio onto a DVD in such a way that a NORMAL EVERYDAY REAL DVD player (not a pc, not one that can play MP3s, etc) could play it?


I have heard of a program called AudioDVD. This program only uses uncompressed audio.

Regards,

Richard.
[ + quote]
bbmayo
AfterDawn Addict
_ 		3. August 2005 @ 04:31 _ Link to this message    Send private message to this user   
Best advice I can give is go to WalMart and get a 39$ DVD player that supports MP3 as far as I know there isn't anyway to trick your DVD player that isn't compatable with MP3 into playing MP3's..

Cheers
[ + quote]


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Room101
Newbie
_ 		3. August 2005 @ 04:36 _ Link to this message    Send private message to this user   
I think you missed the point of the question.

MP3 is a final form of WAV.

WAV is my start point (either microphone or ripped from CD).

I can't imagine that sound is uncompressed when it is part of a DVD.

If it was uncompressed, you could get nearly 7.5 hours of uncompressed audio onto a DVD.

Even that would be a start!

Richard.
[ + quote]
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