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)： 91/128頁
文件大?。?/td> 2328K
代理商： TECO3264
Data Sheet
August 1999
TECO3264 32-Channel Echo Canceller
91
Lucent Technologies Inc.
Register Architecture
(continued)
Page 0 Read/Write Registers 000
—
07FE
(continued)
Near-End Speech Hangover Register
Table 70. Near-End Speech Hangover Register (04D) [F0]
ê Noise Floor Estimate Maximum 1 Register
Table 71. ê Noise Floor Estimate Maximum 1 Register (04E) [1F]
Bit
7—0 NESPHOC[8:0]
NES Hangover [7:0]
(See ê Noise Floor Estimate Maximum 2 Register (04F) [00], Table
72, on page 92, for NESPHOC[8].) Near-end speech hangover time.
Symbol
Parameter Name and Description
Number of samples that Y is less than YHI in order to declare absence of speech or echo
(range 0 ms—64 ms in 125 μs increments).
Activity detector to declare noise works with YHI.
Numerical value must be higher than YHI, then it will have noise (a # of samples in a
row), and then the echo canceller can adapt.
Recommended value = 11110000.
Bit
7—0
Symbol
MAXMEMP
[13:0]
Parameter Name and Description
ê Noise Floor Estimate Maximum [7:0].
Maximum value of ê noise floor estimate. (See
ê Noise Floor Estimate Maximum 2 Register (04F) [00], Table 72, on page 92, for
MAXMEMP[13:8].)
Controls the maximum noise power that will be generated by the noise matching circuit.
Recommend a value of about –45 dBm0.
Maximum power = 20 log10(MAXMEMP[13:0]/4000).
Recommended value = 00011111.
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