http://www.lightreading.com/document.asp?doc_id=118017
A recent study has found that voice over IM services such as Skype, Yahoo, and Google provide higher quality more realistic quality sound than TDM-based phone services.
More support for IP telephony, and that traditional phone carriers will have to start making adjustments as interest grows in what VOIM can offer.
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.
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.
"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, report writer John Longo writes.
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