Jan 24 2012 | Posted by nicole at 03:26 PM EST
This blog is by Eric Tamme, member of the OnSIP Engineering Team
What is a codec?
Codec is short for “coder-decoder”. A codec is a program, or an implementation of a algorithm, which converts an analog input signal, like your voice, to a digital signal by sampling it according to the algorithm. The codec can also take a sampled stream from a matching codec, and decode the samples back to a similar analog stream that was input originally.
Here is an example codec called PCM: