The MPEG-4 CODER IRIDIUM is composed by 1 to 4 H.264 encoders which allows easily to encode 1 to 8 video channels and 2 to 16 audio channels obtaining a duplicated ASI output. Each module has one or two SDI-HD/SD inputs (high definition or standard definition depending on your needs), one analog audio and video inputs and one ASI input. The audio channels can be used as the stereo audio of a TV program or they can be used as inputs of a radio program. Moreover, it can be used several stereo audio inputs for the same TV service having one program with different languages.