This invention discloses a media screen playback security early warning method, device, and
system, belonging to the technical field of digital
media content security and public
display device management. Addressing issues such as post-event early warning leakage risks, review delays leading to
stuttering, and poor deployment compatibility in existing technologies, this invention connects a plug-and-play edge security review device between the playback host and the media screen. Through a dual-buffer
queue and dynamic buffer adjustment mechanism, it decouples edge AI parallel review from video
stream pass-through. Video frames are stored in a pending review buffer
queue; after AI review passes or replaces violating frames, they are stored in the reviewed buffer
queue and output in their original sequence. Simultaneously, the buffer capacity is dynamically adjusted to eliminate playback discontinuity caused by review delays while ensuring zero leakage of violating content. This invention requires no modification to existing systems and can be quickly deployed in various public media screen scenarios, achieving
millisecond-level violation interception and seamless secure playback.