234 lines
7.7 KiB
Text
234 lines
7.7 KiB
Text
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[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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; experimental bitrate changes depending on RTCP feedback [true / false]
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experimental_rtcp_feedback => false
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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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; By default plc is applied only when the 2 codecs
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; in a channel are different.
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genericplc => true
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; Apply generic plc to channels even if the 2 codecs
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; are the same. This forces transcoding via slin so
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; the performance impact should be considered.
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; Ignored if genericplc is not also enabled.
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genericplc_on_equal_codecs => false
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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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; NOTE: Accurate documentation corresponding to your downloaded version of
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; codec_opus is available from Asterisk's CLI:
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;
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; *CLI> config show help codec_opus opus
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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. (default: 48000)
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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. (default: auto)
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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. (default: no)
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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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; (default: yes)
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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. (default: no)
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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 ; No inband fec
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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 ; Negotiate a constant bit rate
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[opus48]
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type=opus
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max_playback_rate=48000
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max_bandwidth=wide
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bitrate=48000
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packet_loss=10
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[opus64]
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type=opus
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max_playback_rate=48000
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max_bandwidth=full
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bitrate=64000
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[opus96]
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type=opus
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max_playback_rate=48000
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max_bandwidth=full
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bitrate=96000
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