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Display Data Channel (DDC) is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.
When HDMI 2.0 was published and increased the limit to 600 MHz, the HDMI Forum announced that any cable that passed the High Speed certification should work for the increased speeds of HDMI 2.0, so no new cable category was needed, and for the first few years of HDMI 2.0 it was claimed that High Speed cables were good for HDMI 2.0 speeds ...
HDMI is a digital replacement for analog video standards. DVI-D, VGA and HDMI connectors on a graphics card. HDMI implements the ANSI/CTA-861 standard, which defines video formats and waveforms, transport of compressed and uncompressed LPCM audio, auxiliary data, and implementations of the VESA EDID. [4] [5]: p.
For example, an HDMI display can be driven by a DVI-D source because HDMI and DVI-D both define an overlapping minimum set of supported resolutions and frame buffer formats. Some DVI-D sources use non-standard extensions to output HDMI signals including audio (e.g. ATI 3000-series and NVIDIA GTX 200-series ). [ 17 ]
The monitor is connected to the host through the use of a display cable, such as HDMI, DisplayPort, VGA, and more. Older monitors use CRT technology, while modern monitors are typically flat panel displays using a plethora of technologies such as TFT-LCD , LED , OLED , and more.
On larger CRT monitors (17 in or 43 cm or larger), most people experience mild discomfort unless the refresh is set to 72 Hz or higher. A rate of 100 Hz is comfortable at almost any size. However, this does not apply to LCD monitors. The closest equivalent to a refresh rate on an LCD monitor is its frame rate, which is often locked at 60 fps ...