Polycom C16 Uživatelský manuál stáhnout pdf (Strana 112)

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Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12

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selecting the Snd Reinforcement option of the gated/automixed as shown in the

following figure. Selecting the Snd Reinforcement option will ensure that the

proper input processing path is selected for routing microphones to

loudspeakers.

Acoustic Echo Cancellation (AEC)

The AEC can be enabled/disabled by toggling the AEC button. The AEC con-

trol shows the mode of the acoustic echo canceller with Xmit indicating the

system is transmitting audio to the remote site and Recv indicating the system

is receiving audio from the remote site (and heard in the local room).

The room gain is shown graphically in the meter and the number in the box

next to the meter. Room gain is defined in more detail in Appendix B. The dis-

play of room gain is limited from -10 dB to +20 dB. See Chapter 7 for additional

information on room gain.

The AEC references for each input are specified in the pull-down combination

boxes for the associated input signal. As described in the section on virtual

channel groups, the AEC reference for the entire virtual channel group can be

selected and that information will propagate to all the virtual channels of the

To use the feedback processing, enable the processing from the EQ page and also

select the sound reinforcement version of input processing path in the matrix.

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