參數(shù)資料
型號(hào): MT93L04
廠商: Zarlink Semiconductor Inc.
英文描述: 128-Channel Voice Echo Canceller
中文描述: 128頻道語(yǔ)音回聲消除器
文件頁(yè)數(shù): 40/56頁(yè)
文件大小: 903K
代理商: MT93L04
MT93L04
Data Sheet
40
Zarlink Semiconductor Inc.
6-4
SupDec
These three bits control how long the echo canceller remains in a fast convergence
state following a path change, Reset or Bypass operation. A value of zero will keep
the echo canceller in fast convergence indefinitely.
3-0
res
Reserved bits. Must always be set to zero for normal operation.
Bit
Name
Description
Echo Canceller A, Control Register A4
Echo Canceller B, Control Register B4
res
res
res
res
SD
0
SD
1
SD
2
0
7
6
5
4
3
2
1
0
Reset Value:
50
H
.
Read/Write Address: 09
H
+ Base Address
Read/Write Address: 29
H
+ Base Address
Power Reset Value
74h
7
6
5
4
3
2
1
0
NS7
NS6
NS5
NS4
NS2
NS1
NS0
NS3
Echo Canceller A, Noise Scaling (NS)
Echo Canceller B, Noise Scaling (NS)
Read/Write Address:
0Ah
+ Base Address
Read/Write Address:
2Ah
+ Base Address
If the comfort noise level estimator is unable to correctly match the background noise level, this register
can be used to scale the comfort noise up or down. A neutral value of 80h will prevent any scaling.
Values less than 80h will scale the comfort noise level down. Values greater than 80h will scale the
comfort noise level up. Scaling is done linearly, so to scale the comfort noise
down
by 1 dB, a value of
72h would be used (-1 dB = 89% of original level, 0.89
(dec)
80h = 72h). Similarly, to scale up by 1 dB,
use a value of 8Fh (1 dB = 112% of original level, 1.12
(dec)
80h = 8Fh).
Power Reset Value
0Ch
7
6
5
4
3
2
1
0
IR7
IR6
IR5
IR4
IR2
IR1
IR0
IR3
Echo Canceller A, Injection Rate (IR)
Echo Canceller B, Injection Rate (IR)
Read/Write Address:
0Bh
+ Base Address
Read/Write Address:
2Bh
+ Base Address
The NLP ramps-in comfort noise during the initial background noise estimation stage. This register
provides control over the ramp-in speed. Higher values will increase the ramp-in speed.
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參數(shù)描述
MT93L04A 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:128-Channel Voice Echo Canceller
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MT93L16 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:AEC with Noise Reduction & Codecs for Digital Hands-Free Communication
MT93L16AF 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 2CH G.711 W/OUT TONE DETECTION 48TQFP - Rail/Tube