presets.draft

来自「MPEG-4编解码的实现(包括MPEG4视音频编解码)」· DRAFT 代码 · 共 46 行

--

 Phone  300 -  3400 hz, mono:
         --highpass  0.300 
         --lowpass   3.400 
         --noshort        (preechoes are a minor issue)
         --resample 16    (8 would be better, needs MPEG2.5)
         -m m -b 16       (8 is a litle bit to low :( 

 Tape    20 - 18000 hz, stereo:
         --highpass  0.020
         --lowpass  18.000
         --resample 44.1
         -m j -b 128

 HIFI    20 - 20000 hz, stereo:
         --highpass  0.020
         --lowpass  20.000
         --resample 44.1
         -m j -b 160

 CD       0 - 22050 hz, stereo: (full 44.1kHz frequency range)
         -m s -b 192

 Studio   0 - 24000 hz, stereo: (full 48kHz frequency range)
         -m s -b 256



-- thanks to Ross Levis:

 FM    30 - 15000 hz, stereo:
         --lowpass 15.000
         --lowpass-width 0 (sharp cut-off)
	 --resample 32
         -m j -b 128

 HQvoice (interviews) 100 - 12000 hz, mono:
           --lowpass  12.000
           --highpass  0.100
	   --resample 24
           -m m -b 64


-- feel free to extend this list further --