Hi first, your G68 is displaying CINEMA this is one of the available multichannel presets.
The G68 can only select this if it is processing a multichannel signal (be that DD / DTS bitstream or discrete (3xSPDIF) PCM or multichannel analogue.

So it is safe to conclude that in your setup the G68 is receiving a multichannel DD / DTS bitstream.

If you want to see what input the processor is receiving you need to change the display mode. This is done by press display (sometimes function+display) on the system remote.

Regards,
Carl,

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