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MT9122

MITEL
Part Number MT9122
Manufacturer MITEL
Description Dual Voice Echo Canceller
Published Feb 2, 2022
Detailed Description MT9122 Dual Voice Echo Canceller with Tone Detection Data Sheet Features • Dual channel 64 ms or single channel 128 ms ...
Datasheet PDF File MT9122 PDF File

MT9122
MT9122

Overview
MT9122 Dual Voice Echo Canceller with Tone Detection Data Sheet Features • Dual channel 64 ms or single channel 128 ms 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 September 2005 Ordering Information MT9122AE MT9122AP MT9122APR MT9122AP1 MT9122APR1 28 Pin PDIP 28 Pin PLCC 28 Pin PLCC 28 Pin PLCC* 28 Pin PLCC* Tubes Tubes Tape & Reel Tubes Tape & Reel *Pb Free Matte Tin -40°C to +85°C Applications • Wireless Telephony • Trunk echo cancellers Description The MT9122 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation conforming to ITU-T G.
165 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.
Sin Rout ENA2 ENB2 NLP REV LAW FORMAT TD1 TD2 Linear/ µ/A-Law Offset Null + - Non-Linear Processor Linear/ µ/A-Law Disable Tone Detector Programmable Bypass Adaptive Filter Control Microprocessor Interface Double-Talk Detector Narrow-Band Detector Disable Tone Detector Linear/ µ/A-Law 12dB Attenuator Offset Null Linear/ µ/A-Law Echo Canceller A Echo Canceller B VDD VSS PWRDN IC F0od F0i BCLK/C4i MCLK Figure 1 - Functional Block Diagram 1 Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor ...


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