CloudComm Summit – Graves On SOHO Technology

HDVoice: A Visual Analogy

September 16, 2011
Michael Graves
Wideband

HDV IP550 Here’s something of a challenge; find a visual way to represent the information density of HDVoice vs a narrowband PSTN call…and try to make it something the everyone can relate to. This is part of my recent attempt at such a display.

The human voice can create sound energy in the range of 80 Hz to 14 KHz. In contrast, the PSTN conveys a much more limited pass-band, typically 300 Hz – 3.4 KHz. That means that the PSTN fails to convey more than 70% of the potential energy in a voice.

IT Expo West & CloudComm Summit 4

ITEXPO-Logo Let me be blunt, at present I’m just on the periphery of the telecom space. I’m still a user, specifically a home office user. Not being directly involved in the telecom industry I don’t get the opportunity to take part if many of the major industry events. However, when TMC decided to hold IT Expo West 2011 in Austin, TX it proved just too good an opportunity to pass up.

Austin is essentially right in my back yard. “Just over yonder” in local terms. OK, it’s really a two-and-a-half hour drive, but that’s still close compared to its usual location in Los Angeles. When TMC offered a deeply discounted uber-early-bird registration back in February I took the plunge and bought a show pass.