In addition to standard signal I/O frames, the DRS systems include a special purpose circuit cards for de-embedding (DEMUX-3G Card) digital audio from SDI, HD-SDI, or 3G-SDI The card resides in the Cheetah video frame and marries the video routing capability of the Cheetah Video Matrix Routers with the audio routing capability of the Cheetah DRS Audio Router. This card is compatible with SDI video signals up to 3Gbps and compliant with SMPTE 259M, 292M and 424M. Audio may be de-embedded from any SD, HD or 3G signal. The Cheetah DEMUX-3G card provides 16 SDI video inputs and de-embeds all audio groups and channels from all sixteen video signals. Up to 256 de-embedded audio signals may be selected as input sources for the DRS channel group. In DRS system configuration, the DEMUX-3G card functions as a signal input frame. Full digital signal processing and stereo remedies may be applied to embedded audio signals.