December 2005
Beginner
336 pages
5h 28m
English
Content preview from Voice over IP First-Step
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Chapter 2. Making Waves: Turning Your Voice into 1s and 0s
What You Will Learn
After reading this chapter, you should be able to
✓ | Explain how the spoken voice is digitized. |
✓ | Select an appropriate coder decoder (CODEC) to transmit digitized voice. |
✓ | Determine how much bandwidth is needed to support your voice calls. |
Binary 1s and 0s don’t come out of our mouths when we speak. However, if our voices are to be carried across a Voice over IP (VoIP) network, that’s exactly how our voices need to look.
In their natural form, our voices are analog, meaning a continuously varying waveform. VoIP networks, on the other hand, transmit our voices digitally, using binary encoding, meaning a series of 1s and 0s, as shown in Figure 2-1. Obviously some conversion has ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.