Re: [FFmpeg-devel] [PATCH v2] opusdsp: add ability to modify deemphasis constant

2024-04-25 Thread Lynne
Apr 25, 2024, 02:08 by mich...@niedermayer.cc: > On Wed, Apr 24, 2024 at 12:58:54PM +0200, Lynne wrote: > >> Apr 24, 2024, 10:54 by d...@lynne.ee: >> >> > xHE-AAC relies on the same postfilter mechanism >> > that Opus uses to improve clarity (albeit with a steeper >> > deemphasis filter). >> > >>

Re: [FFmpeg-devel] [PATCH v2] opusdsp: add ability to modify deemphasis constant

2024-04-24 Thread Michael Niedermayer
On Wed, Apr 24, 2024 at 12:58:54PM +0200, Lynne wrote: > Apr 24, 2024, 10:54 by d...@lynne.ee: > > > xHE-AAC relies on the same postfilter mechanism > > that Opus uses to improve clarity (albeit with a steeper > > deemphasis filter). > > > > The code to apply it is identical, it's still just a > >

Re: [FFmpeg-devel] [PATCH v2] opusdsp: add ability to modify deemphasis constant

2024-04-24 Thread Lynne
Apr 24, 2024, 10:54 by d...@lynne.ee: > xHE-AAC relies on the same postfilter mechanism > that Opus uses to improve clarity (albeit with a steeper > deemphasis filter). > > The code to apply it is identical, it's still just a > simple IIR low-pass filter. This commit makes it possible > to use alt

[FFmpeg-devel] [PATCH v2] opusdsp: add ability to modify deemphasis constant

2024-04-24 Thread Lynne
xHE-AAC relies on the same postfilter mechanism that Opus uses to improve clarity (albeit with a steeper deemphasis filter). The code to apply it is identical, it's still just a simple IIR low-pass filter. This commit makes it possible to use alternative constants. Version 2 changes: Move the dee