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What is the DDC?

April 26, 2017DDC

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What is the DDC?

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DDC stands for Display Data Channel. In a video system, the vast majority of information flow occurs from a source to a sink where the video and/or audio travels. DDC provides a back channel from the sink to the source to indicate events like hot-plug. In addition, it allows the sink to communicate its display output capabilities back to the originating source device. Without this feature, devices like graphics cards or DVD players would have to guess at what video/audio formats a display would like to see. The DDC specification is currently at rev DDC-CI and is available from VESA (www.vesa.org).