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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頻道語音回聲消除器 |
| 文件頁數(shù)： | 22/56頁 |
| 文件大?。?/td> | 903K |
| 代理商： | MT93L04 |
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MT93L04
Data Sheet
22
Zarlink Semiconductor Inc.
Description of the Single MT93L00
Device Overview
The MT93L00 architecture contains 32 echo cancellers divided into 16 groups. Each group has two echo
cancellers, Echo Canceller A and Echo Canceller B. Each group can be configured in Normal, Extended Delay or
Back-to-Back configurations. In Normal configuration, a group of echo cancellers provides two channels of 64 ms
echo cancellation, which run independently on different channels. In Extended Delay configuration, a group of echo
cancellers achieves 128 ms of echo cancellation by cascading the two echo cancellers (A & B). In Back-to-Back
configuration, the two echo cancellers from the same group are positioned to cancel echo coming from both
directions in a single channel, providing full-duplex 64 ms echo cancellation.
Each echo canceller contains the following main elements (see Figure 4).
Adaptive Filter for estimating the echo channel
Subtractor for cancelling the echo
Double-Talk detector for disabling the filter adaptation during periods of double-talk
Path Change detector for fast reconvergence on major echo path changes
Instability Detector to combat oscillation in very low ERL environments
Non-Linear Processor for suppression of residual echo
Disable Tone Detectors for detecting valid disable tones at send and receive path inputs
Narrow-Band Detector for preventing Adaptive Filter divergence from narrow-band signals
Offset Null filters for removing the DC component in PCM channels
12 dB attenuator for signal attenuation
Parallel controller interface compatible with Motorola microcontrollers
PCM encoder/decoder
compatible with
μ
/A-Law ITU-T G.711 or Sign-Magnitude coding
Each echo canceller in the MT93L00 has four functional states: Mute, Bypass, Disable Adaptation and Enable
Adaptation. These are explained in the section entitled Echo Canceller Functional States.
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相關(guān)代理商/技術(shù)參數(shù) |
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 |
| 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 |
| MT93L04AG2 | 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 制造商:Microsemi Corporation 功能描述:IC VOICE ECHO CANCEL 365MCMBGA |
| 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 |
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