The displayed channel (DDC) is a communication channel based on the 2 bus profile. HDMI specifically to a device requires that the data channel display, advanced (E-DDC) to run slow, that by the source HDMI to read the data, the E-EDID from the device, the sink, the HDMI can be used to understand how the format of audio/video can have.[5 ]: §§8.1,CEC-1.2–CEC-1.3, HDMI requires that the E-DDC speed standard mode I2C (100 kbps), it runs, and it allows for optional speed mode, fast (400 kbps) to implement it. :< < E > channel is actively used to protect digital content with high bandwidth (HDCP).