參數(shù)資料
型號(hào)： TECO3264
廠商： Lineage Power
英文描述： 32-Channel Echo Canceller(32通道回波清除器)
中文描述： 32通道回聲消除器（32通道回波清除器）
文件頁數(shù)： 41/128頁
文件大?。?/td> 2328K
代理商： TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
41
Lucent Technologies Inc.
Parameters
(continued)
Nonlinear Processor Parameters
The parameters in Table 16 determine the selection of nonlinear processor (NLP) options and how those selected
options will behave. The NLP works in conjunction with the linear processor to provide total echo control.
Table 16. Nonlinear Processor Parameters
Symbol
Description
Memory Map
Starting Address (Hex)
YHI[12:0]
NMATCHEN
MAXMEMP[13:0] Maximum value of ê noise floor estimate.
GAMMA[7:0]
Upward adaptation rate for ê noise floor estimate.
EMPCLP[13:0]
Clamp on ê EMP for noise floor estimate.
EX[1:0]
Error exercise bits.
MHI[13:0]
High hysteresis threshold for noise floor estimate.
VARLOSS
Sets noise matching mode to variable loss.
SELNF
Noise floor select for colored noise matching.
MLO[13:0]
Low hysteresis threshold for noise floor estimate.
NLPFRZ
Nonlinear processor freeze.
USE_SNLP
Soft NLP select.
AN1[4:0]
Noise floor estimate scale factor.
MSCALE[2:0]
Noise floor estimate scale factor.
AN2[5:0]
Noise floor scaling factor used to compare with Esoft.
USE_ZERO
ê zero crossing select.
USE_NM
Noise transparency select.
INT_TIME[9:0]
SNLP interval time.
TESTNM[5:0]
Noise matching circuit test inputs.
NUM_INTS[8:0]
Number of intervals (steps) for SNLP action before noise matching.
ELOSS[13:0]
Loss increment for attenuated ê.
CLRNLP
Active-low clear of NLP state variable storage.
ZERO_THR[7:0] ê zero crossing select.
LOSS_INC[13:0] SNLP incremental loss factor applied every 125*INT_TIME μs
during ramp mode.
Max loss = NUM_intervals * LOSS_INC.
TESTSV[7:0]
Test inputs for NLP SV storage.
SVT[21:0]
Test inputs for NLP SV storage.
Y threshold for significant energy.
Enable noise matching.
0x4B
0x4C
0x4E
0x50
0x51
0x52
0x53
0x54
0x54
0x55
0x56
0x56
0x57
0x57
0x58
0x58
0x58
0x59
0x5A
0x5B
0x5C
0x5D
0x5E
0x5F
0x61
0x62
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