AT2004 - Atelic Systems

AT2004 4 Channel ADPCM Processor

The AT2004 is a four full-duplex channels, ADPCM processor with conferencing and echo cancellation capabilities. It follows the G.726 ITU Standard for ADPCM compression for 40k, 32k, 24k and 16k bitrates with selectable µ-law and Alaw input/output. It conforms to ITU G.165/G.168 Digital Adaptive Echo Canceller specification for line echo delay up to 20ms. Us.

Features

Features
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• 4 full channels of ITU G.726 ADPCM 4 full channels of ITU G.165/G.168 complia nt echo cancellation with up to 20ms echo delay Fast and robust convergence for adaptive echo canceller, even in the presence of background noise Nonlinear processing with adaptive suppression threshold and comfort noise generation for echo canceller Per channel selectable µ-Law and A-law input/output On-chip time slot assignment Available internal clock generator and frame sync. generator Simple 3-wire serial command port for chip configuration Conferencing capabilities for up to 3 addit.