Line Echo Canceller (G.168-2000 compliant)

Ittiam Echo Canceller implements line echo cancellation algorithm conforming to ITU-T G.168-2000 specifications. It can be configured to cancel echo tails of lengths 16ms to 128 ms. The Echo canceller implements the following components

• Adaptive Filter for estimating the echo
• Double talk detector for disabling the filter adaptation during the periods of double-talk
• Non Linear Processor for suppressing the residual echo
• 2100 Hz tone detector to disable the echo cancellation

Technical Specification

• Conformance to ITU-T G.168-2000 specification
• Multi-channel, Reentrant implementation
• C callable API for initialization and echo cancellation
• Echo Tail length Configurable from 16 to 128 ms
• Rapid Convergence
• Low residual echo
• Robust double talk detection, without divergence or clipping
• Robust performance against Narrowband signals and background noise
• Fast convergence on echo path changes (during call forwarding)

Applications

• Conventional Telephone networks
• Voice Over IP or Voice Over ATM
• Voice communication with Satellite / Wireless networks

Platforms

• Currently supported on TI C64x™ (TMS320C64xx™) and TI C64x+™/DaVinci™ (DM644x™)
• For further details contact mkt@ittiam.com