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Newsletter: GL Announces Portable and Automated Wireless Voice Quality Testing Solutions

Welcome to the March Issue of GL Communication's Newsletter providing information and insight into the latest product introductions and reviews.

Wireless networks can impair voice quality by various means - poor mobile phone quality, voice compression and decompression algorithms, delay, loss or gain in speech levels, noise, acoustic and landline echo, and other distortions are some of the contributors to the problem. Wireless network providers and equipment manufacturers have been in search of ways to quantify these impairments in a consolidated, unified, and "end-to-end" manner. GL's Automated Wireless Voice Quality Testing, provided through GL's VQuad™ software, combined with GL's Voice Quality Testing (VQT) software, permits this simple "end-to-end" assessment in an efficient, portable, and hassle-free format. See application note for details.

GL's solution is compact and portable: Two notebook PC's utilizing VQuad™ and VQT software packages and a few hardware accessories. Independent locations connected to the wireless network via mobile phones can be easily configured for sending reference voice files and recording the received degraded file, thus allowing end-to-end path analysis through the VQuad™ GUI engine for synchronously transmitting and recording voice files ("reference" and "degraded" files) across a wireless connection.

The degraded voice files can be analyzed in real-time or in a post-processed manner by the VQT software. GL's VQT utilizes three widely accepted algorithms to perform the voice comparisons, the Perceptual Analysis / Measurement System (PAMS) per Rec. P.800, the Perceptual Speech Quality Measurement (PSQM) per Rec. P.861, and the Perceptual Evaluation of Speech Quality (PESQ) per Rec. P.862. GL's VQT performs analysis using all algorithms simultaneously producing results for each in easy-to-understand graphical and tabular formats.

Main Features:

  • Compact and portable solution for testing mobile end-to-end voice quality
  • Synchronized software for sending/recording of voice files
  • Flexible architecture and features for recording locations, parameters, and time
  • MOS for all voice quality standards PAMS, PSQM, PSQM+, PESQ
  • Additional measurements include Mean Active Speech Level, Noise Level, Latency and Clipping
  • Results available in real-time or through post-processing
  • Compatible with automated GPS location timestamping

An application note has been provided describing the GL's Automated Wireless Voice Quality Testing in detail. Please review this application note and give us a call if you are interested in GL's products/software for this or other applications. We would be happy to consult with you on solutions to your testing needs and we look forward to hearing from you.

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