Nexus Digital Audio Codec PDF User Manual


The Comrex Nexus is a device designed to send and receive either 7.5 kHz or 15 kHz audio on ISDN digital telephone circuits. Its functions and pieces are best broken down and described individually: Codec is an acronym for Coder/Decoder. We define this as the part of the Nexus which takes in an analog audio signal, converts it to a digital bit stream, and performs operations on this bit stream to remove redundant information. This operation is known as Digital Audio Compression. The codec section also takes an incoming, previously compressed bit stream and converts it to analog audio. In the Nexus codec, the analog audio inputs and outputs are available to the user. The input and output compressed bit streams are connected internally to the terminal adapter section. There are different types of compression, and the type is often defined by the name of the algorithm employed. The Nexus uses the international standard G.722 algorithm, and it is also capable of a higher speed version of G.722 which provides 15 kHz bidirectional audio at 112/ 128 kb/s. For more information on this subject, see the ?G.722 Algorithm? section on page 31.  Read Full Manual

March 13, 2010 | Posted in Audio Video, Electronic Manual, Nexus Technology | Leave a Comment