Even ter verduidelijking :
mp3,mpc,ogg,aac,vqf,wma,... zijn allemaal "lossy" codecs wat dus wil zeggen dat er informatie weggelaten wordt. Als je dus terug naar wav decodeerd heb je niet de originele wav terug!
flac,ape,lpac,wavpack,optimfrog,shorten,... zijn "lossless" codecs die dus de audio zo goed mogelijk proberen te comprimeren zonder dat er info verloren gaat. Als je deze dus terug naar wav decodeerd heb je de originele wav terug!
Dibrom, core developer van lame, gebruikt zelf geen mp3 om zijn muziek op te slaan!
Dibrom
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Although a bit OT, from my personal experience (extensive blind listening tests), in relation to quality (and which ff123's test seems to support as well) the following codecs usually seem to come out in this order, from best to worst:
1. MPC
2. AAC
3. Vorbis
4. MP3
When RC3 hits, I suspect the gap between AAC and Vorbis will start to close. Right now AAC mostly has a big edge on Vorbis because Vorbis' pre-echo is very weak, possibly worse than a well tuned MP3 encoder even. MPC further edges out AAC in regards to issues like pre/post-echo and performance on difficult clips like impulses, etc. From a quality standpoint, MP3 should really only be used if compatibility is a very large factor to take into consideration, such as hardware support.
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Dibrom
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At any rate, I think that in the end, if you need lower bitrates and quality as high as it is with --alt-preset standard... you'd probably be better off looking at a more efficient format. Something like MPC -standard or perhaps one of the Vorbis VBR modes should do the trick.
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Garf (ogg vorbis developer)
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The LAME project was essentially handicapped by the MP3 standard. You can have many good ideas, MP3 will only take you so far. MPC on the other hand extended MP2. Buschel could put in whatever he wanted and build on the known and tested technology (thats not to say he didn't invent any new...but he could use what was already there). Ogg could also put in whatever it wanted, but had to work its way around patents from the ground up, so they had to invent totally new stuff.
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JohnV (tester)
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MP3:
+ The best portability, software and hardware support
+ Encoder and decoder source code available
+ Quality is decent with high bitrate and with high bitrate vbr
+ Future harware support is pretty much certain
- Quality is not enough for demanding people
- Many MP3s available for download are far from optimal quality, because bad quality encoders exists.
- Many different quality encoders (some are very bad quality)
Ogg Vorbis:
+ Free, encoder and decoder are open source
+ Patent free technology, streaming is free of charge
+ Better quality than MP3 at all bitrates
+ With recent encoder versions quality gap between Ogg Vorbis and MPC is closing
+ Bitrate peeling (adaptively scalable bitrate without re-encoding)
+ Most likely format to achieve the largest user base after MP3
+ Downloadable files are high quality (no MP3-like quality differencies)
- No dedicated portable player or hardware support yet
- Still not final, development of encoder release candidates takes a long time
iso-AAC:
+ high quality AAC encoder produces much better quality than MP3
+ MPEG ISO compatible streams (Psytel AAC encoder)
+ Hardware support is emerging. Future looks good.
+ Streaming of MPEG2 and MPEG4 -AAC is free of charge
+ Can achieve good quality at lower bitrates
- Heavily patented.
- Licence royalties
MusePack MPC:
+ The best quality at mid/high bitrates
+ Very fast encoding end decoding
+ Decoder is free and source code is available
+ Current encoder (mppenc 1.0) will remain free
+ Will be playable in future programmable portable PDAs
+ Downloadable files are high quality (no MP3-like quality differencies)
- Not very good for 128kbps and under encoding.
- No dedicated portable player or hardware support
- No directX filters -> not for movie audio, only for music encoding.
WMA,RealAudio,VQF,MP3pro
+ WMA,RealAudio and MP3pro should be used for very low bitrate music only, and high quality should not be expected.
- We don't consider these formats good enough quality wise, to compete with the above formats, except WMA and Mp3pro can compete at 64kbps and lower bitrates.
- Microsoft's claims that WMA8-64kbps is CD-quality, is very very far from the truth. No format can achieve even near transparent results at under 128kbps.
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Deze quotes komen allemaal van het
http://www.hydrogenaudio.org/ forum dat imho veel beter is om deze dingen te bespreken.