參數(shù)資料
型號(hào)： MT93L00A
廠商： Zarlink Semiconductor Inc.
英文描述： Multi-Channel Voice Echo Canceller
中文描述： 多通道語音回聲消除器
文件頁數(shù)： 12/39頁
文件大小： 636K
代理商： MT93L00A
MT93L00A
Data Sheet
12
Zarlink Semiconductor Inc.
Echo Canceller Functional States
Each echo canceller has four functional states:
Mute, Bypass, Disable Adaptation
and
Enable Adaptation
.
Mute
In Normal and in Extended Delay configurations, writing a “1” into the MuteR bit replaces Rin with quiet code which
is applied to both the Adaptive Filter and Rout. Writing a “1” into the MuteS bit replaces the Sout PCM data with
quiet code.
In Back-to-Back configuration, writing a “1” into the MuteR bit of Echo Canceller A, Control Register 2, causes
quiet code to be transmitted on Rout. Writing a “1” into the MuteS bit of Echo Canceller A, Control Register 2,
causes quiet code to be transmitted on Sout.
In Extended Delay and in Back -to -Back configurations, MuteR and MuteS bits of Echo Canceller B must always
be “0”. Refer to Figure 4 and to Control Register 2 for bit description.
Bypass
The Bypass state directly transfers PCM codes from Rin to Rout and from Sin to Sout.
When Bypass state is
selected, the Adaptive Filter coefficients are reset to zero.
Bypass state must be selected for at least one frame
(125
μ
s) in order to properly clear the filter.
Figure 6 - Device Configuration
LINEAR
16 bits
2’s complement
SIGN/
-Law
A-Law
MAGNITUDE
CCITT (G.711)
μ
-Law
A-Law
+Zero
(quiet code)
0000h
80h
FFh
D5h
Table 1 - Quiet PCM Code Assignment
Rin
Rout
Sout
Sin
echo
path A
Optional -12dB pad
echo
path B
+
-
channel A
channel A
+
-
channel B
channel B
E.C.A
E.C.B
a) Normal Configuration (64 ms)
Adaptive
Filter (64 ms)
Adaptive
Filter (64 ms)
Optional -12dB pad
PORT1
PORT2
+
-
channel A
channel A
E.C.A
Sin
Sout
Rout
Rin
b) Extended Delay Configuration (128 ms)
echo
path A
Adaptive Filter
(128 ms)
Optional -12dB pad
PORT1
PORT2
+
E.C.A
Sin
Sout
Rout
Rin
c) Back-to-Back Configuration (64 ms)
-
E.C.B
+
-
echo
path
echo
path
Adaptive
Filter (64 ms)
Optional -12dB pad
Adaptive
Filter (64 ms)
Optional -12dB pad
PORT1
PORT2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT93L00AB 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 32CH G.164/G.165/G.168/G.711 W/ TONE DET - Trays
MT93L00AV 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 32CH G.164/G.165/G.168/G.711 W/ TONE DET - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC VOICE ECHO CANCELLER 208PBGA 制造商:Microsemi Corporation 功能描述:IC VOICE ECHO CANCELLER 208PBGA
MT93L04 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:128-Channel Voice Echo Canceller
MT93L04A 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:128-Channel Voice Echo Canceller
MT93L04AG 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 128CH G.164/G.165/G.168/G.711 W/ TONE DE - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC VOICE ECHO CANCEL 365MCMBGA
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