參數(shù)資料
型號： MT9122AP
廠商： Mitel Networks Corporation
英文描述： CMOS Dual Voice Echo Canceller with Tone Detection
中文描述： CMOS雙語音回聲消除的音偵測
文件頁數(shù)： 1/32頁
文件大?。?/td> 143K
代理商： MT9122AP
8-17
Description
The MT9122 Voice Echo Canceller implements a
cost effective solution for telephony voice-band echo
cancellation
conforming
requirements. The MT9122 architecture contains two
echo cancellers which can be configured to provide
dual channel 64 millisecond echo cancellation or
single channel 128 millisecond echo cancellation.
The MT9122 supports ITU-T G.165 or G.164 tone
disable requirements.
to
ITU-T
G.165
The MT9122 operates in two major modes:
Controller or Controllerless. Controller mode allows
access to an array of features for customizing the
MT9122 operation. Controllerless mode is for
applications where default register settings are
sufficient.
Features
Dual channel 64ms or single channel 128ms
echo cancellation
Conforms to ITU-T G.165 requirements
ITU-T G.165/G.164 disable tone detection
supported on all audio paths
Narrow-band signal detection
Programmable double-talk detection threshold
Non-linear processor with adaptive suppression
threshold and comfort noise insertion
Offset nulling of all PCM channels
Controllerless mode or Controller mode with
serial interface
ST-BUS or variable-rate SSI PCM interfaces
Selectable
μ
/A-Law ITU-T G.711;
μ
/A-Law Sign
Mag; linear 2’s complement
Per channel selectable 12 dB attenuator
Transparent data transfer and mute option
19.2 MHz master clock operation
Applications
Wireless Telephony
Trunk echo cancellers
Figure 1 - Functional Block Diagram
Linear/
μ
/A-Law
+
Non-Linear
Processor
Offset
Null
Linear/
μ
/A-Law
Linear/
μ
/A-Law
Microprocessor
Interface
Double-Talk
Detector
Disable Tone
Detector
A
F
C
Narrow-Band
Detector
Linear/
μ
/A-Law
Offset
Null
12dB
Attenuator
Echo Canceller A
Echo Canceller B
VDD
VSS
PWRDN
IC
F0od
F0i
BCLK/C4i
MCLK
Sout
Rin
ENA1
ENB1
CONFIG1
CONFIG2
S1/DATA1
S2/DATA2
S3/CS
S4/SCLK
Sin
Rout
ENA2
ENB2
NLP
REV
LAW
FORMAT
TD1
TD2
-
Programmable
Bypass
Disable Tone
Detector
ISSUE 5
September 1996
Ordering Information
MT9122AP
MT9122AE
-40
°
C to + 85
°
C
28 Pin PLCC
28 Pin PDIP
MT9122
Dual Voice Echo Canceller
with Tone Detection
CMOS
Preliminary Information
相關(guān)PDF資料
PDF描述
MT9123AE CMOS Dual Voice Echo Canceller
MT9123 Dual Voice Echo Canceller(雙話音回聲消除器)
MT9123AP CMOS Dual Voice Echo Canceller
MT9125AE CMOS Dual ADPCM Transcoder
MT9125AP CMOS Dual ADPCM Transcoder
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT9122AP1 制造商:Zarlink Semiconductor Inc 功能描述:ECHO CANCELLER CHIP 2CH G.164/G.165/G.711 W/ TONE DETECTION - Rail/Tube 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE DUAL VOICE ECHO CANCELLER W/TD
MT9122APR1 制造商:Zarlink Semiconductor Inc 功能描述:ECHO CANCELLER CHIP 2CH G.164/G.165/G.711 W/ TONE DETECTION - Tape and Reel
MT9123 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual Voice Echo Canceller
MT9123AE 制造商:Microsemi Corporation 功能描述:ECHO CANCELLER CHIP 2CH G.165/G.711 W/OUT TONE DETECTION 28P - Rail/Tube
MT9123AE1 制造商:Microsemi Corporation 功能描述:
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