DSP In IP Telephony

Voice over Internet Protocol, how it works

Homes were connected to Internet through circuit switched telephone networks with slow connection speeds in the past. Nowadays telephony services are more and more build on top of Internet. One example of this are third generation mobile networks, conventional phone calls are converted from circuit switched systems to packet networks. VOIP has become a commodity because of services like Skype and Google Talk.

The key components of an IP Telephony Solution is Digital Signal Processors (DSP).The words we speak are in a form of a sine wave (analog), ranging from 300 hertz to 3200 hertz. It requires a type of conversion that can only be done by DSPs to allow our voice to travel across an IP network. DSP convert our word from analog to digital and vice versa, this transformation is impossible without DSP. DSP is a processor for processing and generation of real-world signals such as video, voice, and music. Digital Signal Processors embedded in every mobile phone, or CDplayer.

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April 23, 2008 | Filed Under Internet, VOIP | Leave a Comment