參數資料
型號： 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： 96/128頁
文件大?。?/td> 2328K
代理商： TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
96
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
—
07FE
(continued)
Spectrally Matched Noise Matching Select Register
Table 81. Spectrally Matched Noise Matching Select Register (058) [B0]
Soft NLP Number Interval Time Steps 1 Register
Table 82. Soft NLP Number Interval Time Steps 1 Register (059) [08]
Bit
5—0
Symbol
AN2[5:0]
Parameter Name and Description
Noise Floor Scaling Factor 2 [5:0].
Noise floor scaling factor used to compare with
Esoft.
Recommended value = 110000.
ê Zero Crossing Select.
6
USE_ZERO
0 = Go directly to noise matching after NUM_INTS[8:0] counted in ramp mode.
1 = Wait for near zero crossing to go to noise matching after NUM_INTS[8:0] counted in
ramp mode.
Recommended value = 0.
Noise Transparency Select.
Noise transparency mode allows the noise matching inser-
tion to be colored by low-level, near-end input samples intended to improve spectral
noise matching. If the noise matching is enabled and the transparency mode is provi-
sioned, then the noise matching data is a combination of a randomly generated
sequence and attenuated y-y ê samples. See table below.
7
USE_NM
USE_NM
0
0
0
0
1
1
1
1
NMATCHEN
0
0
1
1
0
0
1
1
VARLOSS
0
1
0
1
0
1
0
1
Noise Matching Mode
No noise matching is inserted.
No noise matching is inserted.
White noise is inserted.
White noise is inserted.
Noise transparency is inserted.
VARLOSS option is in effect.
Noise transparency is inserted.
VARLOSS option is in effect.
0 = White noise matching.
1 = Colored noise matching, spectral noise matching, or noise transparency [recom-
mended value].
Bit
7—0
Symbol
INT_TlME[9:0]
Parameter Name and Description
Soft NLP Number Interval Time Steps [7:0].
(See Soft NLP Number Interval Time
Steps 2 Register (05A) [00], Table 83, on page 97, for INT_TIME[9:8].) The number of
sample intervals that a particular loss will be applied in the soft NLP mode (the width of
the steps in the staircase loss insertion).
Interval time = 125 μs x INT_TIME.
Recommended value = 00001000.
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