GAITHERSBURG, Md. -- GL Communications Inc. announced today the release of its new product Acoustic Echo Canceller (AEC) Compliance Test Software. Speaking to news persons, Mr. Vijay Kulkarni, CEO of the company said, “Acoustic echo is a serious impairment in communications. It is encountered in standard landline phones, mobile phones, IP phones, and other phones able to operate in a “speakerphone mode”. Feedback from the speaker into the mic must be cancelled by an AEC before it reaches the talker. The performance of an AEC is specified in ITU-T Specifications, G.167 (03/1993) and P.340 (05/2000). GL’s software allows the user to test AECs, in any environment, for compliance to these specifications.

“Specifically, the application uses GL’s T1 E1 Analyzer products and customers AEC hardware or software to perform Acoustic Echo Canceller testing. Rin and Sin files (Stimulus and Echo) are prepared by Automated AEC Test Software in accordance with user inputs and Rout and Sout are captured and processed”.

He added, “As depicted in the below diagram, Rin is the source signal (from the far end), which goes through Acoustic Echo Canceller (AEC) and Sout is the echo cancelled signal, which comes out of AEC. The leakage from Rout to Sin is due to the acoustic echo. The module, which includes AEC, Rin, Rout, Sin and Sout, can be a Sound Card, a Mobile Phone, a Regular Phone, an IP Phone, or a SpeakerPhone”.

GL Communications Inc.