| reply to dcdeadbeat5
Re: HD Voip? said by dcdeadbeat5:1. Broadband connections are not as common as you might think. Wideband calls (HDVoice, G.722, or whatever marketing term you want to use) require more bandwidth and higher quality connections than standard PSTN quality (G.711) calls. The bandwidth requirements for G.711 and G.722 are exactly the same. The G.711 codec has an 8-kHz sampling rate, and any signal above 3.44 kHz is blocked. With G.722 wideband codec, the sampling rate is increased to 16 kHz, doubling the frequency range to 8 kHz. The end result is still 64kbps. |
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| Yes but you are assuming that most people can even use G.711. There are many people in the United States with less than 1Mbps connections or poor quality (high latency) connections that are going to be limited to G.729a.
For example my mother's AT&T DSL will not handle G.711 and must use G.729a due to high packet loss.
Remember that bandwidth issues are not necessarily about the speed of your connection but how few packets are dropped. That's why T1s are still popular in businesses as they are relatively low latency and high quality. |
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