Report: VOIM Sounds Better Than PSTN
VOIM clients such as Skype Ltd. mix IP voice with messaging, file transfer, and even video. VOIM services also detect "presence," or the availability of a person, device, or application to communicate.
In his report, Voice Over IM (VOIM) and How it is Changing Traditional Telephony, Heavy Reading analyst John Longo writes that those features, taken together, will eventually change the "communications paradigm." And traditional service providers, he suggests, will have to respond.
"Carriers will ultimately need to reconcile traditional telephony with VOIM as they face increasing pressure from their customers to receive the same types of flexible services" that VOIM enables, Longo writes.
The analyst explains that VOIM sounds better than TDM-based voice because it uses better-performing codecs, which convert analog signals into digital and back again.
The codecs used in TDM-based voice systems cover an 8kHz band directly in the middle of the voice frequency range, explains Global IP Sound AB CEO Gary Hermansen. (See GIPS Gets Patents.)
By contrast, Hermansen says, new IP codecs cover a 16kHz swath of the frequency range, which better conveys the highs, lows and texture of a caller's voice. Hermansen says VOIM codecs can also compensate for packet loss, and cancel out echo and background noise.
The end result is that VOIM makes the human voice sound more, well, human than traditional telephony ever did.
Hermansen's company has developed perhaps the most widely-used set of IP voice codecs among VOIM providers. Skype, Google (Nasdaq: GOOG) and Yahoo Inc. (Nasdaq: YHOO).)
But it doesn't have the market to itself, as Russian outfit Spirit Corp. has been making headway in the IP voice processing market. (See Spirit DSP Touts Deal and Trinity Licenses Spirit Tech.)
For more information on the report, click here.
— Mark Sullivan, Reporter, Light Reading