The vocoder (voice encoder/decoder) adopted by the P25 committee is the Improved Multi-Band Excitation (IMBE) vocoder, developed by Digital Voice Systems. The IMBE vocoder operates at a basic rate of ...
Project 25 is a digital radio airlink standard designed to create interoperability on 12.5 kHz and 6.25 kHz channels. Although Project 25 radios can pass voice or data communications, this article ...