On Mon, Aug 04, 2008 at 07:58:56PM +0200, Michael Niedermayer wrote: > On Mon, Aug 04, 2008 at 06:43:23PM +0200, kostya wrote: > > Author: kostya > > Date: Mon Aug 4 18:43:22 2008 > > New Revision: 3010 > > > > Log: > > Audio preprocessing for better compression > [...9 > > +// low-pass filter declarations and code > > +#define IIR_ORDER 4 > > + > > +/** > > + * filter data for 4th order IIR lowpass Butterworth filter > > + * > > + * data format: > > + * normalized cutoff frequency | inverse filter gain | coefficients > > + */ > > A lowpass filter should be advantaneous for all MDCT based codecs not just > AAC, but then i guess that is true for the whole psychoacoustic stuff ...
I've already though of moving that into separate file. Anyway, after I finish that I will think on how to apply psychoacoustics to other codecs. > [...] > -- > Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB > > I wish the Xiph folks would stop pretending they've got something they > do not. Somehow I fear this will remain a wish. -- Måns Rullgård _______________________________________________ FFmpeg-soc mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc
