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Image Constraint Token

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Image Constraint Token or ICT is a protocol flag that causes downsampling of high-definition content on Blu-ray and HD DVD to slightly-better-than-DVD quality video. It is part of the Advanced Access Content System, the Digital Rights Management system used in the next-generation of optical discs

Operation

When the AACS-enabled player is not connected to a HDCP-compliant display (such as when a display is connected to the player through analog connections) and the ICT flag is activated, the player automatically reduces the high-definition video to the resolution of 960x540 pixels and outputs it. Some HDTV early adopters dislike the ICT flag because the first generation HDTVs did not come with HDCP support and if it was activated these people would not be able to enjoy high-definition video off optical discs. Hollywood has reportedly agreed in not downgrading high-definition content for the two formats until 2012.[1]

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