Digigram Software for IQOYA SERV/LINK 88 (Upgrades from 8 Codecs to 16) - Manual (Page 62)

IQOYA SERV/LINK user manual
62
Input signal for silence
detection In case IQOYA is used as an encoder, it can generate an alarm when silent audio is detected on
the audio inputs, and sets this alarm off when the audio signal is detected again. (Note that all
the alarms handled by IQOYA can be enabled/disabled from the “Alarms setup” menu).
The parameter “Input signal for silence detection” allows defining on which input signal the
silence detection is applied. Possible choices are:
- Mean of left + right channels : compares the mean value of a left and right sample to the
threshold. In case the calculated values are always lower to the silence threshold during the
defined silence duration, silence condition is reached.
- Left channel only : compares the left channel samples to the silence threshold. In case the
sample values are always lower to the silence threshold during the defined silence duration,
silence condition is reached.
- Right channel only : compares the right channel samples to the silence threshold. In case the
sample values are always lower to the silence threshold during the defined silence duration,
silence condition is reached.
- Left and right channels : compares both the left and right channel samples to the silence
threshold. In case the sample values on both channels are always lower to the silence threshold
during the defined silence duration, silence condition is reached.
- At least one channel: compares both the left and right channel samples to the silence
threshold. In case the sample values on at least one of the two channels are always lower to the
silence threshold during the defined silence duration, silence condition is reached.
Silence threshold &
Silence duration
Silent audio is defined through these two parameters, expressed in dBfs.
When audio level is below the threshold value during at least the defined duration, the alarm
“Analog audio in silent” or “Digital audio in silent” is set (if it is enabled from the “Alarms setup”
menu).
Signal threshold
Signal duration
Signal drop duration
Audio signal is defined through the three parameters. Audio signal is considered as recovered if
all the following conditions are true: