Extended Display Identification Data
Capability information a display gives to a source, such as supported resolutions, timings and audio. The Dr HDMI can replace, hold or copy this information.
KNOWLEDGE BASE // HDMI LANGUAGE
HDMI Glossary.
The technical terms around the Dr HDMI, translated into plain language. Handy for troubleshooting and for understanding what the device actually changes.
Stored EDID profile
A memory slot holding an EDID. The original Dr HDMI has eight banks: five fixed presets, two programmable banks and one sink copy bank.
Hot Plug Detect
HDMI signal a device uses to indicate that the connection/capabilities need to be looked at again. The Dr HDMI generates an HPD event whenever an EDID bank is activated.
High-bandwidth Digital Content Protection
Copy protection for digital audio/video. The Dr HDMI is designed to pass HDCP handshakes through; it is not an HDCP stripper.
HDMI generation of this Dr HDMI
The original Dr HDMI is based on HDMI 1.4a. So don't expect HDMI 2.1 features such as 4K120, VRR or 8K.
HDMI Ethernet & Audio Return Channel
Features that use HDMI pin 14, among others. The Dr HDMI has a pin 14 on/off switch so you can test certain compatibility problems.
Display Data Channel
Communication channel over which the EDID is read and HDCP authentication runs. The Dr HDMI filters the EDID requests on this line and passes the HDCP handshakes through.
More bits per colour channel
More colour depth than standard 8-bit. HDfury specifies 1080p60 with 12-bit Deep Color for the original Dr HDMI, plus x.v.Color.
Consumer Electronics Control
HDMI control protocol that lets devices, for example, switch each other on/off or control input selection. The Dr HDMI specifies CEC pass-through.
Source device
The device that sends out HDMI: for example a PC, games console, media player or set-top box.
Receiving HDMI device
Usually a TV, monitor or projector. Bank 8 of the Dr HDMI can store the EDID of the connected sink.
Copying the display's EDID
With the middle button, the Dr HDMI reads the current display EDID and stores it in bank 8.
HDMI intermediate link
A device that sits between source and sink and passes the HDMI signal on. Receivers and certain splitters are typical examples; the Dr HDMI itself also works as an HDMI/DVI-D emulator/repeater.
The HDMI negotiation
Umbrella term for the exchange of information through which devices decide how the connection is set up. EDID, HPD and HDCP each play a different role in it.
1920 × 1200
16:10 resolution found mainly on monitors/projectors. HDfury explicitly lists 1920×1200 in the Dr HDMI's video support.
HDfury's specified 2K support
HDfury lists "2K, 1920×1200, 1080p" for this model. Don't automatically read the term as a synonym for modern 2560×1440/QHD; technically that is a different designation.
Single-link video clock
The single-link video clock HDfury specifies for the original Dr HDMI.
Specified video bandwidth
The video bandwidth HDfury quotes for this original model. The figure follows from 225 MHz times 10 bits per TMDS channel.
Transition-Minimized Differential Signaling
The way HDMI 1.4 sends picture and sound over three data channels and one clock channel. The TMDS clock determines the bandwidth; on the original Dr HDMI it is at most 225 MHz.
Pixel clock
The number of pixels per second a video timing needs, including the invisible blanking areas. 1080p60 needs 148.5 MHz; with 12-bit Deep Color the TMDS clock becomes 1.5 times higher.
Source supply voltage
The source puts 5 volts on pin 18. The display uses that voltage to detect that a source is connected and answers via HPD on pin 19. The Dr HDMI can extend the +5V signal through the chain.
Digital Visual Interface
Older digital video connection that uses the same TMDS signal as HDMI, but without audio. According to HDfury, the Dr HDMI also works as a DVI-D emulator and repeater.