Yes, that seems to be the case. Perhaps an approximating filter could be used or an adaptive filter that given a reference level chooses the correct frequency response...?
----- Original Message ----- From: "Simeon Cran" <[EMAIL PROTECTED]> To: "'MP3 encoders development list'" <mp3encoder@minnie.tuhs.org> Sent: Thursday, August 11, 2005 6:18 PM Subject: RE: [mp3encoder] Psychoacoustic models and frequency response oftheears Wouldn't it depend on the level at which the user played back the file? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Christofer Bustad Sent: Thursday, August 11, 2005 6:59 AM To: mp3encoder@minnie.tuhs.org Subject: [mp3encoder] Psychoacoustic models and frequency response of theears Hi everybody! There is one thing I've been thinking about regarding the psychoacoustic models used in MPEG Audio. Do the models know about the equal-loudness curves or do they assume that your ears have a flat frequency response? I have studied both models described in the standard document (ISO/IEC 11172-3) and it seems to me that the models assume (apart from the ATH) that the frequency response of the ears is flat. Am I correct? If so, could putting a stuitable filter just before the psychoacoustic models improve the sound quality? Thanks for any responses to my thoughts! Christofer Bustad _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org http://minnie.tuhs.org/mailman/listinfo/mp3encoder _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org http://minnie.tuhs.org/mailman/listinfo/mp3encoder _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org http://minnie.tuhs.org/mailman/listinfo/mp3encoder
