Comparison between AAC, ac3 and mp3 ?

ukb008 · 30th April 2005, 02:13

Hi.

Has there been any comparison amongst AAC, ac3 and mp3 audio ? I'd appreciate some links for reading.

Regards.

Kurtnoise · 30th April 2005, 09:22

http://www.rjamorim.com/test/

Very useful information for aac and mp3. ac3 hasn't been tested...

ukb008 · 30th April 2005, 12:33

The link is about which encoder performs best at prescribed bitrates using the AAC and mp3 compression algorithms. Not exactly the stuff I was looking for. I'm interested in a comparison not between encoders (e.g. Sorenson Squeeze 3.5 Fhg Pro and Psytel AAcenc 2.15), but the comression algorithms themselves.

Regards.

AMTuring · 30th April 2005, 17:00

AAC has everything that mp3 has plus a lot more. It supports a wider range of block sizes, prediction filters, and I don't remember what else. A good place to start reading is here: mpeg site . This is also a good site to learn about mp3 theory.

AC3 is a proprietary format and you will not find much detail about how it works. However, there must be some people who know because it has been reverse engineered by several folks (e.g. azid software used in BeSweet for audio recompression from DVD's).

I hope this helps a little.

ukb008 · 30th April 2005, 19:18

Yes, indeed, it does help quite a lot.

Regards.

Gabriel_Bouvigne · 2nd May 2005, 16:02

AC-3 specs are publically available in the ATSC-A52 document.

30th April 2005, 02:13	#1 \| Link
ukb008 Registered User Join Date: Feb 2005 Location: South of the Equator Posts: 410	Comparison between AAC, ac3 and mp3 ? Hi. Has there been any comparison amongst AAC, ac3 and mp3 audio ? I'd appreciate some links for reading. Regards.

30th April 2005, 12:33	#3 \| Link
ukb008 Registered User Join Date: Feb 2005 Location: South of the Equator Posts: 410	Thanks Kurtnoise13. The link is about which encoder performs best at prescribed bitrates using the AAC and mp3 compression algorithms. Not exactly the stuff I was looking for. I'm interested in a comparison not between encoders (e.g. Sorenson Squeeze 3.5 Fhg Pro and Psytel AAcenc 2.15), but the comression algorithms themselves. Regards.

30th April 2005, 19:18	#5 \| Link
ukb008 Registered User Join Date: Feb 2005 Location: South of the Equator Posts: 410	Thanks, AMTuring. Yes, indeed, it does help quite a lot. Regards.

30th April 2005, 09:22	#2 \| Link
Kurtnoise Swallowed in the Sea Join Date: Oct 2002 Location: Aix-en-Provence, France Posts: 5,191	http://www.rjamorim.com/test/ Very useful information for aac and mp3. ac3 hasn't been tested...

30th April 2005, 17:00	#4 \| Link
AMTuring Contributing Member Join Date: Mar 2005 Location: USA Posts: 31	AAC has everything that mp3 has plus a lot more. It supports a wider range of block sizes, prediction filters, and I don't remember what else. A good place to start reading is here: mpeg site . This is also a good site to learn about mp3 theory. AC3 is a proprietary format and you will not find much detail about how it works. However, there must be some people who know because it has been reverse engineered by several folks (e.g. azid software used in BeSweet for audio recompression from DVD's). I hope this helps a little.

2nd May 2005, 16:02	#6 \| Link
Gabriel_Bouvigne L.A.M.E. developer Join Date: Dec 2001 Location: Paris - France Posts: 276	AC-3 specs are publically available in the ATSC-A52 document.