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In April 2002, Hitachi, panasonic, philips, Silicon Image, SONY, Thomson, Toshiba, a total of seven companies HDMI organization was set up to develop a new dedicated to digital video/audio transmission standard. At the end of 2002, high-definition Digital Multimedia Interface (High definition Digital Multimedia Interface) HDMI 1.0 standards promulgated. HDMI and DVI compatible on pins, only adopted different encapsulation. Compared with DVI HDMI can transmit digital audio signal, and an increase in support for HDCP, at the same time provides better DDC optional features. HDMI support 5 GBPS data transfer rate, can transmit far 15 meters, enough to cope with a 1080 p video and an 8 channel audio signal. And because a 1080 p video and an 8 channel audio signal needs less than 4 gb/s, therefore also has the very big margin HDMI. That allows it to use a cable connection DVD player respectively, receiver and PRR. In addition support HDMI EDID, DDC2B, therefore has the HDMI equipment has the characteristics of "plug and play", between signal and display device will automatically "consultation", automatically select the most appropriate video/audio formats HDMI since birth has experienced from version 1.0, 1.1, 1.2, 1.2 a, 1.2 version (version 1.3 on double bandwidth and color depth extension, have certain innovation, bandwidth has increased, from the original 165 MHZ (4.95 Gbps) increased to 340 MHZ (10.2 Gbps). The benefits of increased bandwidth is higher resolution, refresh rate, and color depth increase. In the future the HDMI equipment is commonly high version of the HDMI, such as the PS3 will support version 1.3, down high version is compatible. |
