Hidden information transmission system and method based on LED display and visible light communication

The invention discloses a hidden information transmission system and method based on LED display and visible light communication. The system comprises a hidden information input module, a display content input module, an information implantation and signal modulation module, an LED display driving module, an LED display screen, a high-speed photoelectric sensor/detector and a signal demodulation and information extraction module, wherein the hidden information input module and the display content input module are respectively connected with the information implantation and signal modulation module, and the information implantation and signal modulation module is connected with the display driving module and the LED display screen; the emitted visible light signal is received by a high-speed photoelectric sensor/detector after being propagated through a space channel and is converted into an electric signal, and meanwhile, the high-speed photoelectric sensor/detector is connected with asignal demodulation and