AACS and BD+ and HDCP are proprietary encryption and content management DRM. Unecessary but not free.
The Advanced Access Content System (AACS) is a standard for content distribution and digital rights management. It is developed by AACS Licensing Administrator, LLC (AACS LA), a consortium that includes Disney, Intel, Microsoft, Panasonic, Warner Bros., IBM, Toshiba and Sony.
BD+ is a component of the Blu-ray Disc Digital Rights Management system. It was developed by Cryptography Research Inc. and is based on their Self-Protecting Digital Content concept.
High-Definition Multimedia Interface (HDMI) is a compact audio/video interface for transmitting uncompressed digital data. Arguably, HDMI is just a wrapper for HDCP encryption and a host of handshaking problems documented in other threads.
The rest, VC-1, H.264, Dolby, DTS are the only licenses I care to pay for.
Perhaps another reason to keep the useless DRM (and other licensed technology) is to squeeze competitors out of the marketplace. Open standards open the field to small innovative companies. Android vs Symbian. Linux vs Windows. USB vs just about any other proprietary interconnect.
Samsung LN40A550, Asus A8N SLI, Athlon 64 X2 3800, XFX HD One 5450, 2 Hauppauge HVR-2250, LG BH10LS30 Blu-ray, Windows 7