We put the focus on the development of HDMI interface to the history of the development: "to support the HDCP agreement".
HDCP is High-bandwidth Digital Content Protection abbreviation, is a highbandwidth digital content protection. In short, HDCP should be a preventing digital content piracy encryption technology, the hardware and software if onedoes not support HDCP, so we can not read the digital content. The next generation of Blu ray and HD DVD will execute HDCP standard. That is to say,if you want to watch the movie at 1980 x 1080 resolution, then the system must support HDCP. Conversely, if not, then you can get the 1/4 resolution.
Playing HDCP encrypted video process, HDCP is an essential link, not only the disc itself with HDCP encryption, the player (includes CD-ROM), graphics,player software and display equipment also need the support of HDCP, users can enjoy 1080p Full HD effect.
Since NVIDIA G80, has added support for HDCP within GPU and ATI's next generation products will use the similar design direction. So we can judge that the future all cards will have with the HDCP function. But displays the situation is quite different, because the implementation of HDCP in the display needs an independent chip, therefore the right to decide whether to support the HDCPproduct completely in the manufacturer. For some low-end products,manufacturers can omit this chip, in order to achieve the purpose of cost control. So in the future for the discussion of the HDCP, more will be launched around the display products.
But the current D-Sub signal in the play HD DVD HD video is no problem,because the current HDCP protocol can protect the digital signal (HDMI and DVI), and an analog interface (D-Sub) and no relationship.
In fact also indeed so, before 2011, even if you still use the CRT display, stillcan play protection HD video. This is because there are a large number ofusers in the consideration of using analog devices, so the technology of AACS in HD DVD copyright protection finalized, relaxed for analog equipmentrequirement, simple said, before 2011 all feeder analog interface display devices can play the video content protected with HDCP. This is our play HDvideo test in a D-Sub interface, an important reason for not encounteredobstacles. But after 2011, such a good thing might not exist, since 2011 after the launch of the film, by the publishers decide whether to let the opensimulation equipment through the gates of HDCP. After 2014, the door will be completely closed to all analog device.