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Old 2007-08-10, 01:12 PM
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tgunn2760 tgunn2760 is offline
 
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Re: Is decompressed AC3 lossy?

Quote:
Originally Posted by jameskg
do you mean it was 'teased' into fake 'stereo' like TISDU or so you mean they simply doubled the mono track to 2 channels to make the DVD compliant?

If the latter - don't 'fold down', as that doubles the amplitude values - just extract the left channel.

The thing is, if you want it to go to CD, red book says it must have two channels - mono doesn't fly. So, you'd have to copy left to right again (which is what they did in the first place, so maybe leave it).
I don't know if the original recording was mono or stereo.

I have a DVD which has AC3 stereo audio, but the volume is very low.

I extracted the audio in wav and deleted a channel as someone suggested, ran it through Goldwave and then doubled the volume. It sounds great, but it's lossy.

I know there is a lossless LPCM audio file out there, but the size would make it too big for a DVD5, so I was wondering if after deleting one channel of the lossless stereo LPCM the audio would still be lossless, especially IF the original audio was in mono-and is there a way to tell if it was mono?
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