peb20954 Infineon Technologies Corporation, peb20954 Datasheet - Page 95

• Manufacturer Part Number: peb20954
• Description: Smart Integrated Digital Echo Canceller Sidec
• Manufacturer: Infineon Technologies Corporation

VDFCTRL[7:0] (Addr.: 76H): Voice Detection Freeze Control,
write protected, Reset value = B4H
VDFRELEN
VDFREL[2:0]:
VDFSOL[3:0]
CONFPSD[7:0] (Addr.: 1CH): Configuration of 2100 Hz tone phase shift detector,
write protected, Reset value = 43H
DT30DIS
DEP[1:0]
Preliminary Data Sheet
DT30DIS
RELEN
VDF
DEP[1]
REL[2]
VDF
’0’: normal speech protection
’1’: Increased Speech protection
’0’: No freeze of H-Register on no voice detection when
’1’:Freeze of H-Register on no voice detection when
Threshold for total echo loss (ERL+ERLE) at which H-Register are
"000": 27 dB
"010": 30 dB
"100": 33 dB
"110": 36 dB
Threshold for residual echo level at Send Out below
which the H-Register are frozen on a ’no voice’ signal.
"0000":minus infinite: no freezing for periodic signals
"0001":-66 dBm0
"0010":-63 dBm0
"0011":-60 dBm0
"0100":-57 dBm0
...
"1101":-30 dBm0
"1110":-27 dBm0
"1111":-24 dBm0
’0’: disable evaluation if phase shift detection of >30 ms is identified
’1’: enable phase shift detection >30 ms
Evaluation time:
If no phase shift is detected in the time interval below the evaluation
is terminated.
frozen on a no voice signal detection if VDFRELEN = ’1’
combined loss (ERL+ERLE) > VDFREL
combined loss (ERL+ERLE) > VDFREL
DEP[0]
REL[1]
VDF
REL[0]
MIN[1]
VDF
DBP
95
"001": 28.5 dB
"011": 31.5 dB
"101": 34.5 dB
"111": 37.5 dB
FSOL[3]
MIN[0]
DBP
VD
FSOL[2]
MAX[2]
DBP
VD
Register Description
FSOL[1]
MAX[1]
DBP
VD
PEB 20954
PEF 20954
FSOL[0]
MAX[0]
DBP
VD
04.99