Figure 10: Single-Link TMDS
Display Data Channel (DDC)
The VESA standard Display Data Channel, shown in Figure 10, is part of the DVI specification. It is an I2C bus used for data communications between the two devices. The data can include information specifying the type of display device connected and can also be used to support copy protection.
Extended Display Identification Data (EDID) EDID is the VESA standard protocol used over the DDC so the display device can communicate identi- fication about itself to the host device. The data, stored in memory in the display device, can include its resolution, sync timing and refresh rates, etc. It is part of the plug and play package.
Figure 11: HDCP
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