Video Display Frequency Modulation for Anti-Piracy

The patent applies frequency modulation by changing the temporal and spatial parameters of video frames. Specifically, it modulates the display timing of video frames at different frequencies to create invisible light patterns that are imperceptible to the human eye but detectable by recording devices. This parameter-based approach embeds security without adding physical hardware complexity.

The patent introduces a temporal dimension to video display security by modulating frames over time at frequencies beyond human perception. Instead of adding spatial watermarks or physical barriers, it uses time-based frequency modulation where the same video content is displayed with varying temporal patterns that encode security information.

The patent implements preliminary anti-action by pre-modulating the video content with invisible frequency patterns before display. This proactive measure embeds anti-piracy information directly into the video stream, so that when recording devices capture the video, they inadvertently record the modulated patterns which can then be detected and used to identify piracy attempts.

The patent uses the video frame timing and display refresh mechanisms as an intermediary to convey security information. The display system itself becomes the medium that embeds the security signal, modulating the visible video content with invisible temporal patterns that serve as both the display medium and the security encoding channel.