Acoustic echo cancellation reference
The Copy channel x values to all channels dialogue allows the Tesira user to quickly apply values of a chosen channel to all AEC channels in the block.Each channel of AEC has a Ch Processing button, which opens up a control dialog window.Invert reverses the polarity of the input signal.Level adjusts the relative input volume.If you hear digital artifacts when the Noise Reduction is used (especially on Medium or High settings) - lower the mic input gain level until artifacts go away. Use the lowest setting that achieves the desired level of background noise reduction. Possible values are Off (set by default), Low, Medium and High. Noise Reduction is intended to reduce steady-state background noises, such as HVAC systems, fans, motors, or other mechanical devices, that may be picked up by the conferencing microphones and transmitted to the far end.NLP is active when either AEC or Noise Reduction are active. The following NLP Level settings are available: None, Low (set by default), Medium and High. NLP Level optimizes the operation of the Non-Linear Processing (NLP), which is a stage of signal processing post-AEC, and is designed to eliminate any residual echo that may remain after the AEC adaptive filter.AEC enables and disables the AEC processing.? indicates it has not yet been compiled, or has been manually unassigned from a card in the DSP Properties.
Acoustic echo cancellation reference software#
Device IO (x.y) indicates which physical hardware output is associated with that software channel, where x indicates which card slot and y indicates which channel on the card.Note: If you wish to specify a TesiraFORTÉ for AEC inputs, you must choose the desired model from the TesiraFORTÉ hardware list rather than selecting the AEC Input I/O block. Users can choose Autoconfigure to allow the software to automatically allocate it to hardware, or choose to manually assign it to a Server, Rack-mount Expander (EX-MOD with EEC-4 card), or Remote Expander (EX-AEC). Equipment Type When the AEC Input block is selected from the Object Toolbar, an AEC Initialization dialog is produced. If your layout gives the reference its own path, connecting an audio meter to the AEC Ref output will allow it to compile.
The expectation is that it will be placed in line with the room loudspeaker output feed. Note that you need to connect an audio object to the output of the AEC Ref block for it to compile. If "Per channel reference" is not selected the AEC reference block will have a single input that distributes the same signal to all of the AEC inputs associated with that block. This may be useful in mix-minus (locally reinforced) systems. Per channel reference Checking this box creates an AEC Reference block with discrete inputs for each mic, allowing you to send a different AEC reference selection to each mic's AEC circuit. If you know you will not be using the analog input of the SEC-4 you can choose to add AEC without including the AEC input block by leaving this box unchecked. All of the components must be in the same partition for this to work. It is just a matter of connecting lines to the desired input block. Optionally, in Tesira, the AEC block can be linked to other non-AEC input cards (such as those in an EX-MOD) for a remote AEC solution, while leaving the associated SEC-4 analog input available as a standard input. There are several options available when you add AEC inputs to a system: Include AEC Input block For normal applications, this box will be checked and lines will be drawn linking the AEC Input and AEC blocks.