asterisk/codecs.conf@4f973c756446 (annotated)
asterisk/codecs.conf
Fri, 15 Oct 2010 18:46:25 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 15 Oct 2010 18:46:25 +0200
- changeset 261
- 4f973c756446
- permissions
- -rw-r--r--
Update copyright, file server URL, modify doc and link logic.
Now documentation is installed by default to the correct path,
and QtCreator links against Qt shared libraries instead of Qt
static libraries. This unfortunate change supports Nokia's
unfortunate decision to poorly support static linking in Qt.
| michael@202 | 1 | ;[speex] |
| michael@202 | 2 | ; CBR encoding quality [0..10] |
| michael@202 | 3 | ; used only when vbr = false |
| michael@202 | 4 | ;quality => 3 |
| michael@202 | 5 | |
| michael@202 | 6 | ; codec complexity [0..10] |
| michael@202 | 7 | ; tradeoff between cpu/quality |
| michael@202 | 8 | ;complexity => 2 |
| michael@202 | 9 | |
| michael@202 | 10 | ; perceptual enhancement [true / false] |
| michael@202 | 11 | ; improves clarity of decoded speech |
| michael@202 | 12 | ;enhancement => true |
| michael@202 | 13 | |
| michael@202 | 14 | ; voice activity detection [true / false] |
| michael@202 | 15 | ; reduces bitrate when no voice detected, used only for CBR |
| michael@202 | 16 | ; (implicit in VBR/ABR) |
| michael@202 | 17 | ;vad => true |
| michael@202 | 18 | |
| michael@202 | 19 | ; variable bit rate [true / false] |
| michael@202 | 20 | ; uses bit rate proportionate to voice complexity |
| michael@202 | 21 | ;vbr => true |
| michael@202 | 22 | |
| michael@202 | 23 | ; available bit rate [bps, 0 = off] |
| michael@202 | 24 | ; encoding quality modulated to match this target bit rate |
| michael@202 | 25 | ; not recommended with dtx or pp_vad - may cause bandwidth spikes |
| michael@202 | 26 | ;abr => 0 |
| michael@202 | 27 | |
| michael@202 | 28 | ; VBR encoding quality [0-10] |
| michael@202 | 29 | ; floating-point values allowed |
| michael@202 | 30 | ;vbr_quality => 4 |
| michael@202 | 31 | |
| michael@202 | 32 | ; discontinuous transmission [true / false] |
| michael@202 | 33 | ; stops transmitting completely when silence is detected |
| michael@202 | 34 | ; pp_vad is far more effective but more CPU intensive |
| michael@202 | 35 | ;dtx => false |
| michael@202 | 36 | |
| michael@202 | 37 | ; preprocessor configuration |
| michael@202 | 38 | ; these options only affect Speex v1.1.8 or newer |
| michael@202 | 39 | |
| michael@202 | 40 | ; enable preprocessor [true / false] |
| michael@202 | 41 | ; allows dsp functionality below but incurs CPU overhead |
| michael@202 | 42 | ;preprocess => false |
| michael@202 | 43 | |
| michael@202 | 44 | ; preproc voice activity detection [true / false] |
| michael@202 | 45 | ; more advanced equivalent of DTX, based on voice frequencies |
| michael@202 | 46 | ;pp_vad => false |
| michael@202 | 47 | |
| michael@202 | 48 | ; preproc automatic gain control [true / false] |
| michael@202 | 49 | ;pp_agc => false |
| michael@202 | 50 | ;pp_agc_level => 8000 |
| michael@202 | 51 | |
| michael@202 | 52 | ; preproc denoiser [true / false] |
| michael@202 | 53 | ;pp_denoise => false |
| michael@202 | 54 | |
| michael@202 | 55 | ; preproc dereverb [true / false] |
| michael@202 | 56 | ;pp_dereverb => false |
| michael@202 | 57 | ;pp_dereverb_decay => 0.4 |
| michael@202 | 58 | ;pp_dereverb_level => 0.3 |
| michael@202 | 59 | |
| michael@202 | 60 | |
| michael@202 | 61 | ;[plc] |
| michael@202 | 62 | ; for all codecs which do not support native PLC |
| michael@202 | 63 | ; this determines whether to perform generic PLC |
| michael@202 | 64 | ; there is a minor performance penalty for this |
| michael@202 | 65 | ;genericplc => true |
