You're talking about DenonLINK, right? Unfortunately, it's a proprietary standard - they cooked it up in-house after getting tired of waiting for everybody to agree to let FireWire handle DVD-A and SACD digitally. And since HDMI v1.2 or higher will now carry both (or even HDMI v1.1 if you don't mind having your player convert DSD to PCM), nobody's likely to even ask Denon about licensing it.