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): 109/128頁
文件大?。?/td> 2328K
代理商: TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
109
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
07FE
(continued)
Alpha Data Hybrid Return Loss Threshold Register
Table 108. Alpha Data Hybrid Return Loss Threshold Register (073) [40]
Near-End Speech 1 Hangover Register
Table 109. Near-End Speech 1 Hangover Register (074) [FF]
Bit
7—0
Symbol
ADATA[7:0]
Parameter Name and Description
Alpha Data [7:0].
Hybrid or echo return loss (ERL) threshold for data signals. May be
adjusted for consistently poor network hybrids and echo return loss. See also AVOICE
(Alpha Voice Hybrid Return Loss Threshold (071) [40], Table 106, on page 107).
dB = 20log10(ADATA-hex/0x80).
Range: 0 dB—12 dB [recommended value = 6 dB].
Step: 0.1 dB.
Recommended value = 01000000.
Bit
7—0
Symbol
NES1HOC
[8:0]
Parameter Name and Description
Near-End Speech 1 Hangover [8:1].
(See Test Channel Offset Register (07B) [03],
Table 116, on page 112, for NES1HOC[0].) NES1 is the main detector for near-end
speech. NES1HOC is the hangover time of the NES1 detector. The condition for the
absence of NES must be satisfied for 125 μs x NES1HOC[8:0] in order to release the
declaration of NES. Usually values are 32 ms or 64 ms.
(NES2 is an automatic parameter used in noise floor level estimation for noise matching.)
(NES3 [Near-End Speech 3 Hangover Register (076) [00], Table 111, on page 110 and
Test Channel Offset Register (07B) [03], Table 116, on page 112] is strictly experimental.
Recommended value = 11111111.
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