After days of working, all audio processing functions seems are working in the KdvMediaSDK now, and the next step will be getting a proper set for the audio processing algorithms to run under certain environments & circumstance.
I will start it by beginning with AGC module too. Here are the parameters of AGC algorithm.
——————————————-
AGC parameters:
——————————————-
1. Target level DBFS
——————————————-
According to the description of webrtc:
Change of this parameter will set the target peak |level| (or envelope) of the AGC in dBFs (decibels from digital full-scale).
The convention is to use positive values.
For instance, passing in a value of 3 corresponds to -3 dBFs, or a target level 3 dB below full-scale.
Value range: limited to [0, 31].
TODO(ajm): use a negative value here instead, if/when VoE will similarly update its interface.
——————————————-
2. Compression gain DB
——————————————-
Sets the maximum |gain| the digital compression stage may apply, in dB. A
higher number corresponds to greater compression, while a value of 0 will leave the signal uncompressed.
Value range: limited to [0, 90]
——————————————-
3. Enable limiter or not
——————————————-
When enabled, the compression stage will hard limit the signal to the target level. Otherwise, the signal will be compressed but not limited above the target level.
——————————————-
4. Analog level limits
——————————————-
Sets the |minimum| and |maximum| analog levels of the audio capture device.
Must be set if and only if an analog mode is used.
Value range: limited to [0, 65535].
——————————————-
5. Stream saturated or not
——————————————-
Returns true if the AGC has detected a saturation event (period where the signal reaches digital full-scale) in the current frame and the analog level cannot be reduced.
This could be used as an indicator to reduce or disable analog mic gain at the audio HAL.
BTW: Not like the webrtc project, products using KdvMediaSDK are using mixing-audio-on-server mode, so “target level Dbfs” and “gain DB” will be more important to us.
I wish to express some thanks to this writer for rescuing me from such a instance. Because of scouting throughout the the web and finding tips which were not productive, I was thinking my life was well over. Existing minus the solutions to the difficulties you’ve sorted out by way of your good short article is a serious case, as well as the ones which might have negatively affected my career if I hadn’t discovered your blog post. Your knowledge and kindness in touching the whole thing was precious. I am not sure what I would have done if I hadn’t encountered such a solution like this. I am able to at this time relish my future. Thanks for your time very much for the specialized and results-oriented guide. I won’t hesitate to endorse your site to anybody who needs to have care on this problem.