AAC mpeg4 audio codec - AVS Forum
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post #1 of 4 Old 08-31-2000, 11:45 PM - Thread Starter
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I was experimenting with this:
http://faac.sourceforge.net/index.html

Longer encode times, slightly higher decode requirements, better quality, lower bitrates required...

T.

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post #2 of 4 Old 09-01-2000, 11:24 AM - Thread Starter
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Hmmm... doesn't look like any of you are interested.

Anyway I was discussing this with someone and the issue of digital watermarking came up. AAC does not have any watermarking issues at all - it is a free GPU codec.

I did note that the much higher system requirements (in both encode and esp. decode) might turn this into a bit of an Intel/AMD 'tax' if you know what I mean.

I get 3 to 4 times the cpu utilisation depending on processor - measured by Wintop.

Superior codec - smaller file size - superior sound.

Higher cpu usage - longer encode times.

T.

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post #3 of 4 Old 09-01-2000, 12:16 PM
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This being a HT forum I don't know if too many would be interested in audio compression.

There are indeed issues with watermarking and compression.

Watermarking for new dvd-a needs to be "inaudible". But perceptual compressing algorithms like mp3/mp4 relay on removing things from audio which are "inaudible". So they would remove the watermarking if it was truly inaudible ... which defeats the purpose of watermarking.

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post #4 of 4 Old 09-01-2000, 09:31 PM
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I for one am very interested in this format. So is Dolby as I've heard they're doing something with it. AAC should be 30% smaller than MP3, yet its sonically superior and supports 24/192 and multi-channel too.

AAC also supports DRM (digital rights management), so the record industry will become its new best friend since they have so woefully missed the boat on MP3.

Anyway, I saw this encoder/decoder somewhere earlier today and wondered if anyone had tried it. Glad to hear you did. Do you know if you can rip a 24/96 track into an AAC format?

Tom
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