PSB21382 INFINEON [Infineon Technologies AG], PSB21382 Datasheet - Page 146

• Manufacturer Part Number: PSB21382
• Description: Siemens Codec with S/T Transceiver
• Manufacturer: INFINEON [Infineon Technologies AG]

Data Sheet
Description of the programmable parameters:
Parameter
TW
ATT
DS
SW
4.4.2
For optimizing the speakerphone performance the SCOUT-SX provides following test
functions:
- The two register bits (XCSR.SPST) indicate the different speakerphone states (receive,
transmit and idle).
- The momentary magnitude of the AGC attenuation in receive direction can be read out
by an SOP_D command.
4.4.3
The speech detectors (see figure Chapter 79) contained in both transmit and receive
directions consist of two main blocks:
• Background Noise Monitor (BNM)
• Signal Processing
Although the speech detector is fully parameterized, the standard coefficient set for the
speech detector fits perfectly to almost every application and normally don’t have to be
altered.
Speakerphone Test Function and Self Adaption
Speech Detector
# of CRAM
Bytes
1
1
1
1
Range
16 ms to 4 s
0 dB to 95 dB
0.6 to 680 ms/dB
0.0052 to 10 ms/dB
136
Comment
Wait time
Attenuation programmed in GHR or
GHX if speech activity for the other
side was detected
Decay Speed
(Decay Time TD = DS
Switching time (dependent on ATT)
PSB 21381/2
PSB 21383/4
ATT/2)
2001-03-12
Codec