HDCP

Explanation

HDCP (High-bandwidth Digital Content Protection) is a form of DRM that protects digital video and audio as it travels between devices — for example, between a streaming stick and a television via HDMI. Streaming services require HDCP-compliant connections to play HD and 4K content. If a non-HDCP-compliant device is in the signal chain (such as an HDMI splitter or an older monitor), playback may be blocked or downgraded to SD resolution.