The goal of HDCP is to prevent a signal from being routed elsewhere, so it's essentially an anti-piracy mechanism. HDMI uses a method of encryption called HDCP - also known as High-bandwidth Digital Content Protection). The part about HDMI that is complicated, though, is its licensing. Related: What Is HDMI 2.1, And Do I Need It? Its simplicity was a big factor in easing the process of adopting HDTV into most homes. HDMI is powerful (on the highest levels, the only audio/video cable with a higher throughput is DisplayPort) and convenient due to how absurdly ubiquitous it is. The cable itself, which is the result of combined efforts from a group of major electronics corporations (including Sony, Philips, and Toshiba) is actually just a DVI cable with included wiring for audio transfers. HDMI is unique compared to a lot of connection types before it because it combines audio and video into one port. The downside? It's a really frequent issue that some people might literally get every time they turn on certain devices. That's great news because, 99 percent of the time, it won't require replacing any of your electronics. It's usually very easy to solve and rarely indicates a critical problem. The 'No HDMI Signal' problem is a common TV issue that most people have encountered.
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