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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