Posted by: mcgrant
Re: detailed analysis of mp3 encoders - 01/11/2000 11:26
It is an interesting read as is r3mix. My problem with both of these sites is that they focus almost exclusively on objective, measured analysis of manufactured source material.
Well, it really depends on how you look at it. It's certainly true that they spend a lot of time on charts and frequency plots. But in r3mix's case, they have one important reason for it. r3mix's plots show that many MP3 encoders indiscriminantely remove high-frequency information in order to increase compression. The frequency/sensitivity curve of the human ear just isn't that abrupt. So when encoders do that, they will inevitably sacrifice audible sound quality.
r3mix also refers to a controlled listening test that suggests that a good encoder with 256kbps CBR cannot be distinguished from the source on a statistically consistent basis. Unfortuntaely the source they refer to is in German so I can't read it too well...
Michael Grant
12GB Green
080000266
Well, it really depends on how you look at it. It's certainly true that they spend a lot of time on charts and frequency plots. But in r3mix's case, they have one important reason for it. r3mix's plots show that many MP3 encoders indiscriminantely remove high-frequency information in order to increase compression. The frequency/sensitivity curve of the human ear just isn't that abrupt. So when encoders do that, they will inevitably sacrifice audible sound quality.
r3mix also refers to a controlled listening test that suggests that a good encoder with 256kbps CBR cannot be distinguished from the source on a statistically consistent basis. Unfortuntaely the source they refer to is in German so I can't read it too well...
Michael Grant
12GB Green
080000266