Testing times for line echo cancelling software

Edited by the Electronicstalk editorial team Apr 3, 2003

Spirit has licensed its G.168-2000 line echo cancelling software to GL Communications, a leading provider of PC-based telecommunications test, analysis and simulation products.

Spirit has licensed its G.168-2000 line echo cancelling (LEC) software to GL Communications, a leading provider of PC-based telecommunications test, analysis and simulation products.

The LEC software is used to cancel the echo caused by hybrid connection at the two-/four-wire conversion points in telephone networks by subtracting an estimated echo from circuit echo.

The algorithm conforms to ITU-T G.165/G.168-2000 recommendations.

Two basic modifications of G.168-2000 currently offered by Spirit include an "enhanced version" that focuses on high speech quality requirements and is aimed at advanced telephony applications, and a "MIPS economy version" with low MIPS and memory requirements, tailored for MIPS-critical telephony applications, such as simple telephony conferencing devices.

"We pay close attention to quality of our solutions, recognising the high impact that voice quality has on clear, comfortable telephone talks", says Andrew Sviridenko, Spirit's founding CEO.

"The echo canceller software solution licensed to GL Communication is the enhanced version of Spirit's echo canceller, distinguished by excellent speech quality, robust double talk detector and no divergence during double-talk and narrowband signals.

We are pleased to see that our attention to voice quality has yielded us an echo canceller solution that meets requirements of our clients and enables to improve voice quality and good service of wire line networks".

"Spirit's G.168 software was easy to incorporate into our EC testing solutions", says Vijay Kulkarni, CEO of GL Communications.

"The adoption of Spirit's software represents an enhancement to our roster of echo canceller testing solutions that range from manual, lab-oriented approaches to fully automated production-oriented approaches.

The enhancements complement our voice quality testing functionality for wireless and wire-line networks, employing PAMS, PSQM, and PESQ algorithms".