isd-t360sb ETC-unknow, isd-t360sb Datasheet - Page 94

• Manufacturer Part Number: isd-t360sb
• Manufacturer: ETC-unknow

ISD-T360SB
2-58
10
12
22
47
48
49
50
Index
Silence (VOX):
VOX_DET_ENERGY_THRES
HOLD
Silence (VOX):
VOX_DET_TIME_COUNT
Silence (VOX):
VOX_DET_TOLERANCE_TIM
E
Constant Energy:
CONST_NRG_DET_TIME_
COUNT
Constant Energy:
CONST_NRG_DET_
TOLERANCE_TIME
Constant Energy:
CONST_NRG_DET_LOW_
THRESHOLD
Constant Energy:
CONST_NRG_DET_HIGH_
THRESHOLD
Parameter Name
Table 2-8: TUNABLE PARAMETERS: Energy Detection
This parameter determines the minimum energy level at which
voice is detected. Below this level, it is interpreted as silence.
If you divide (multiply) the value by 2, you get approximately a 3db
decrease (increase) in the threshold. The mapping between
energy level and the parameter value is as follows (measured on
the codec output when a 400Hz tone was injected into the codec
input):
Legal values: 1 to 32767.
This parameter, in units of 10 ms, determines the period of silence
before the VoiceDSP processor reports silence. The accuracy of the
constant is ±10 ms.
Legal values: 0 to 65535.
Controls the maximum energy-period, in 10 ms units, that does
NOT reset the vox detector.
Legal values: 0 to 255.
Minimum elapsed time until the VoiceDSP processor reports
constant energy level. Units: 10 ms. Accuracy: ±10 ms
Legal values: 1 to 65534
Variations in constant energy, up to this time, do not reset the
constant energy detector. Units: 10 ms.
Legal values: 0 to 255
Determines the minimum energy level that is treated as constant
energy. The minimum energy is calculated as follows:
(1—1/2
Legal values: 1 to 16
Determines the maximum energy level that is treated as constant
energy. The maximum energy is calculated as follows:
(1 + 1/2
Legal values: 0 to 16
CONST_NRG_DET_LOW_THRESHOLD
CONST_NRG_DET_HIGH_THRESHOLD
10
20
40
80
160
320
640
1280
2560
Tunable value
Description
Energy threshold (dB-Volts)
–45
–42
–39
–36
–33
–30
–27
–24
–21
) * average_energy
) * average_energy
Voice Solutions in Silicon™
2—SOFTWARE
12
700
3
700
5
1
1
Default