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206 lines
7.5 KiB
206 lines
7.5 KiB
[speex] |
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; CBR encoding quality [0..10] |
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; used only when vbr = false |
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quality => 3 |
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; codec complexity [0..10] |
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; tradeoff between cpu/quality |
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complexity => 2 |
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; perceptual enhancement [true / false] |
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; improves clarity of decoded speech |
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enhancement => true |
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; voice activity detection [true / false] |
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; reduces bitrate when no voice detected, used only for CBR |
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; (implicit in VBR/ABR) |
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vad => true |
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; variable bit rate [true / false] |
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; uses bit rate proportionate to voice complexity |
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vbr => true |
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; available bit rate [bps, 0 = off] |
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; encoding quality modulated to match this target bit rate |
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; not recommended with dtx or pp_vad - may cause bandwidth spikes |
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abr => 0 |
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; VBR encoding quality [0-10] |
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; floating-point values allowed |
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vbr_quality => 4 |
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; discontinuous transmission [true / false] |
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; stops transmitting completely when silence is detected |
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; pp_vad is far more effective but more CPU intensive |
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dtx => false |
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; preprocessor configuration |
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; these options only affect Speex v1.1.8 or newer |
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; enable preprocessor [true / false] |
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; allows dsp functionality below but incurs CPU overhead |
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preprocess => false |
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; preproc voice activity detection [true / false] |
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; more advanced equivalent of DTX, based on voice frequencies |
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pp_vad => false |
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; preproc automatic gain control [true / false] |
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pp_agc => false |
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pp_agc_level => 8000 |
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; preproc denoiser [true / false] |
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pp_denoise => false |
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; preproc dereverb [true / false] |
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pp_dereverb => false |
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pp_dereverb_decay => 0.4 |
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pp_dereverb_level => 0.3 |
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[plc] |
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; for all codecs which do not support native PLC |
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; this determines whether to perform generic PLC |
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; there is a minor performance penalty for this |
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genericplc => true |
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; Generate custom formats for formats requiring attributes. |
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; After defining the custom format, the name used in defining |
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; the format can be used throughout Asterisk in the format 'allow' |
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; and 'disallow' options. |
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; |
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; Example: silk8 is a predefined custom format in this config file. |
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; Once this config file is loaded, silk8 can be used anywhere a |
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; peer's codec capabilities are defined. |
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; |
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; In sip.conf 'silk8' can be defined as a capability for a peer. |
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; [peer1] |
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; type=peer |
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; host=dynamic |
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; disallow=all |
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; allow=silk8 ;custom codec defined in codecs.conf |
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; |
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; LIMITATIONS |
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; Custom formats can only be defined at startup. Any changes to this |
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; file made after startup will not take into effect until after Asterisk |
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; is restarted. |
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; |
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; Default Custom SILK format definitions, only one custom SILK format per |
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; sample rate is allowed. |
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[silk8] |
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type=silk |
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samprate=8000 |
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fec=true ; turn on or off encoding with forward error correction. |
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; On recommended, off by default. |
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packetloss_percentage=10 ; Estimated packet loss percentage in uplink direction. This |
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; affects how much redundancy is built in when using fec. |
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; The higher the percentage, the larger amount of bandwidth is |
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; used. Default is 0%, 10% is recommended when fec is in use. |
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maxbitrate=10000 ; Use the table below to make sure a useful bitrate is choosen |
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; for maxbitrate. If not set or value is not within the bounds |
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; of the encoder, a default value is chosen. |
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; |
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; sample rate | bitrate range |
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; 8khz | 5000 - 20000 bps |
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; 12khz | 7000 - 25000 bps |
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; 16khz | 8000 - 30000 bps |
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; 24khz | 20000- 40000 bps |
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; |
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;dtx=true ; Encode using discontinuous transmission mode or not. Turning this |
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; on will save bandwidth during periods of silence at the cost of |
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; increased computational complexity. Off by default. |
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[silk12] |
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type=silk |
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samprate=12000 |
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maxbitrate=12000 |
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fec=true |
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packetloss_percentage=10; |
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[silk16] |
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type=silk |
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samprate=16000 |
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maxbitrate=20000 |
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fec=true |
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packetloss_percentage=10; |
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[silk24] |
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type=silk |
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samprate=24000 |
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maxbitrate=30000 |
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fec=true |
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packetloss_percentage=10; |
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; Default custom CELT codec definitions. Only one custom CELT definition is allowed |
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; per a sample rate. |
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;[celt44] |
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;type=celt |
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;samprate=44100 ; The samplerate in hz. This option is required. |
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;framesize=480 ; The framesize option represents the duration of each frame in samples. |
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; This must be a factor of 2. This option is only advertised in an SDP |
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; when it is set. Otherwise a default of framesize of 480 is assumed |
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; internally |
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;[celt48] |
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;type=celt |
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;samprate=48000 |
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;[celt32] |
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;type=celt |
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;samprate=32000 |
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;============================ OPUS Section Options ============================ |
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; |
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;[opus] |
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;type= ; Must be of type "opus" (default: "") |
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;packet_loss= ; Encoder's packet loss percentage. Can be any number between 0 |
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; and 100, inclusive. A higher value results in more loss |
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; resistance. (default: 0) |
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;complexity= ; Encoder's computational complexity. Can be any number between 0 |
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; and 10, inclusive. Note, 10 equals the highest complexity. |
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; (default: 10) |
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;max_bandwidth= ; Encoder's maximum bandwidth allowed. Sets an upper bandwidth |
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; bound on the encoder. Can be any of the following: narrow, |
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; medium, wide, super_wide, full. (default: full) |
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;signal= ; Encoder's signal type. Aids in mode selection on the encoder: Can |
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; be any of the following: auto, voice, music. (default: auto) |
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;application= ; Encoder's application type. Can be any of the following: voip, |
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; audio, low_delay. (default: voip) |
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;max_playback_rate= ; Override the maximum playback rate in the offer's SDP. |
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; Any value between 8000 and 48000 (inclusive) is valid, |
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; however typically it should match one of the usual opus |
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; bandwidths. A value of "sdp" is also allowed. When set |
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; to "sdp" then the value from the offer's SDP is used. |
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; (default: "sdp") |
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;bitrate= ; Override the maximum average bitrate in the offer's SDP. Any value |
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; between 500 and 512000 is valid. The following values are also |
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; allowed: auto, max, sdp. When set to "sdp" then the value from |
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; the offer's sdp is used. (default: "sdp") |
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;cbr= ; Override the constant bit rate parameter in the offer's SDP. A value of |
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; 0/false/no represents a variable bit rate whereas 1/true/yes represents |
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; a constant bit rate. A value of "sdp" is also allowed. When set to "sdp" |
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; then the value from the offer's sdp is used. (default: "sdp") |
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;fec= ; Override the use inband fec parameter in the offer's SDP. A value of |
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; 0/false/no represents disabled whereas 1/true/yes represents enabled. |
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; A value of "sdp" is also allowed. When set to "sdp" then the value from |
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; the offer's sdp is used. (default: "sdp") |
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;dtx= ; Override the use dtx parameter in the offer's SDP. A value of 0/false/no |
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; represents disabled whereas 1/true/yes represents enabled. A value of |
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; "sdp" is also allowed. When set to "sdp" then the value from the offer's |
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; sdp is used. (default: "sdp") |
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;=============================== OPUS Examples ================================ |
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; |
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;[opus] |
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;type=opus |
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;max_playback_rate=8000 ; Limit the maximum playback rate on the encoder |
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;fec=no ; Force no inband fec on the encoder (i.e don't use what's on the SDP) |
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;[myopus] |
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;type=opus |
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;max_bandwidth=wide ; Maximum encoded bandwidth set to wide band (0-8000 Hz |
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; ; audio bandwidth at 16Khz sample rate) |
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;cbr=yes ; Force a constant bit rate (i.e don't use what's on the SDP)
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