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RadiSys Bolsters VoIP Quality in Convedia Media Server


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March 26, 2009

RadiSys Bolsters VoIP Quality in Convedia Media Server

By Rajani Baburajan, TMCnet Contributor

VoIP-based conferencing architecture brings economic benefits to conferencing service providers. However, they also present new technical challenges in maintaining acceptable voice quality, according to reports.

According to embedded solutions provider RadiSys Corporation, poor voice quality in a VoIP conferencing system could increase costs associated with customer churn, while impacting the bottom line by reducing revenue growth opportunities.
To tackle this, RadiSys (News - Alert) announced new Voice Quality Enhancement features for RadiSys Convedia Media Server. The new solution reportedly eliminates common sources of poor quality such as noise, packet loss and echo, in VoIP conferencing applications.
VQE also captures statistics for voice quality measurement suitable for upholding service level agreements.
RadiSys Convedia media servers support a broad set of IP audio, video, speech and fax media processing features essential for next-generation telecommunications applications. They enable fixed mobile convergence by delivering a shared IP media processing resource for any access network, including wireless, broadband, cable, Public Switched Telephone Network or satellite.
The integration of a comprehensive VoIP audio quality improvement package with existing IP media processing capabilities is an industry first among IP media server vendors, noted RadiSys officials.
The new features with RadiSys Convedia media servers enable CSPs and their VoIP application development partners to address both IP media processing and VoIP quality improvements in a single network element. They also help minimize network complexity and Capex and Opex costs, officials said.
Poor voice quality in multi-party VoIP conferencing services is caused due to background sounds or sub-optimal network and terminal equipment. To deal with this, VQE implements noise gating, noise reduction and noisy line detection mechanisms.
The technology also features packet loss concealment by which it can intelligently restore audio packets lost. RadiSys Convedia media servers with VQE also remove acoustic echo by continuously monitoring all VoIP call legs, dynamically detecting echoes and selectively applying echo cancellation, officials said.
The VQE features are supported with new audio and packet statistics, allowing CSPs to continuously measure audio quality for performance measurement and support SLAs with customers.
“As our conferencing service provider customers grow their VoIP network deployments, they have also expressed a desire for carrier-class solutions to address VoIP audio quality challenges,” said David Smith, general manager, RadiSys Media Server Business Unit.
Only solutions with sophisticated real-time IP media packet processing capabilities can address VoIP audio quality, Smith added. “Adding Voice Quality Enhancement is a natural addition to RadiSys Convedia media servers, and another innovative example of RadiSys applying its engineering expertise in solving real-world deployment issues for our customers.”
“Now that VoIP technology deployment has moved beyond early adoption to large production deployments, maintaining VoIP audio quality in large-scale networks has become a major focus among conferencing service providers,” said Marc Beattie, managing partner, Wainhouse Research.
RadiSys’ attempt to integrate voice quality improvement capabilities within its Convedia media servers enables its customers to deliver dramatically improved call quality on a large scale, Beattie added.
The company’s Convedia media servers reportedly captured 52 percent of the total market for fourth quarter 2008 and 47 percent overall for calendar year 2008. As a result, RadiSys has been named as the market leaders in media servers by market research firm Infonetics in its recent report, “Service Provider VoIP Equipment and Subscribers: Quarterly Worldwide Market Share and Forecasts.”

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Rajani Baburajan is a contributing editor for TMCnet. To read more of Rajani's articles, please visit her columnist page.

Edited by Michael Dinan

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