參數(shù)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(shù): 110/128頁
文件大?。?/td> 2328K
代理商: TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
110
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
07FE
(continued)
NLP Hangover Register
Table 110. NLP Hangover Register (075) [10]
Near-End Speech 3 Hangover Register
Table 111. Near-End Speech 3 Hangover Register (076) [00]
Fast Convergence Threshold Register
Table 112. Fast Convergence Threshold Register (077) [AA]
Bit
7—0
Symbol
NLPHOC
[8:0]
Parameter Name and Description
Nonlinear Processor Hangover [8:1].
(See Test Channel Offset Register (07B) [03],
Table 116, on page 112, for NLPHOC[0].) NLPHOC is the operate time of the NLP. The
condition to operate the NLP Xpower – SBETA (dB) > Epower (essentially far-end single
talk) must exist for 125 μs x NLPHOC[8:0]. Typical value is about 32 ms.
Range: 0 ms—64 ms.
Step: 0.25 ms.
Recommended value = 00010000.
Bit
7—0
Symbol
NES3THR
[8:0]
Parameter Name and Description
Near-End Speech 3 Hangover [8:1].
(See Test Channel Offset Register (07B) [03],
Table 116, on page 112 for NES3THR[0].) Experimental. Do not use. Set to 0.
Bit
7—0
Symbol
THR1[7:0]
Parameter Name and Description
Fast Convergence Threshold [7:0].
E vs. Y fast convergence threshold.
THR1 is one of three separate identical computations that look at Epower vs. Ypower
(see also THR2, Transient NLP Threshold Register (078) [00], Table 113, on page 111
and THR3, H-Reset Threshold Register (079) [00], Table 114, on page 111).
If THR[1] x EEMP > YEMP, then trigger the fast convergence mode.
THR1 triggers fast convergence if MASK2 (bit 2 of Echo Cancellation Convergence Reg-
ister (072) [05], Table 107, on page 108) is unmasked. The value in dB is
20log10(THR[X]/128). The range is generally 0 dB—6 dB.
Recommended value = 10101010.
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