asterisk/codecs.conf@f45355418dfd (annotated)
asterisk/codecs.conf
Fri, 22 Oct 2010 13:22:33 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 22 Oct 2010 13:22:33 +0200
- changeset 271
- f45355418dfd
- permissions
- -rw-r--r--
Import package vendor original specs for necessary manipulations.
| 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 |
