DVI-D, DVI-I, DVI-A, HDMI, HDCP. Confused? You're not alone.
The number of competing devices for transmitting digital video signals is growing daily. It seems that only yesterday we adapted to DVI for its variety of variations, and manufacturers are just beginning to launch devices that support HDMI (High Definition Media Interface) combined with HDCP, the information encryption method used in the next generation of high-resolution content.
The DisplayPort standard, which was set by the old VESA association more than a year ago, was finally completed. The device received a shot of encouragement in the form of public support from the three largest computer manufacturers in the world - IBM / Lenovo, HP andDell. Like HDMI,DisplayPort Is compatible with the DVI format and can be used with a simple adapter to connect a DVI source to the display DisplayPort And vice versa.
According to the Standard, DisplayPort Provides greater bandwidth for high definition content, but it is not clear why HDMI provides enough bandwidth for content at 1080p resolution, which is the highest level of HDTV. The new device enables, inter alia, to transfer 8 audio channels along with the video on the same cable, all with AES data encryption support, making it a standard to compete with HDMI and providing a digital connection solution for all devices.
The stated purpose of the new standard is to allow simple connection of all types of devices, from a laptop to TVs with a single standard. Not surprisingly, the purpose for which the HDMI standard was established is the same. The essential difference between HDMI and DisplayPort Lies in the fact that while HDMI is a closed standard which has to pay royalties for the right to use it,DisplayPort It is completely open, and there is no need to pay any fee to realize it. The fee for using HDMI in combination with HDCP stands at 30,000 per year plus a cost of about $ 0.15 per connection.
It is difficult to predict what will be left of the dominant device, especially when both devices enjoy the support of large players - HDMI from the leading players in the field of home entertainment, while -DisplayPort Enjoys the support of the world's three largest computer manufacturers. Meanwhile, those who pay the price are the consumers. Consumers with devices that support only one standard will be left with limited connectivity options, while manufacturers who add two devices to their devices will roll the cost on consumers.
DVI connection (right) vs. HDMI connection