Digital voice communication system and method based on visible light communication technology

The invention discloses a digital voice communication system and method based on a visible light communication technology. The method comprises that: a signal sending end converts a voice signal into an analogue voice electric signal, converts the analogue voice electric signal into a digital voice electric signal, converts the digital voice electric signal into an optical signal and sends the optical signal; a signal forwarding end receives the optical signal, converts the optical signal into an analogue voice electric signal, converts the analogue voice electric signal into a digital voice electric signal, converts the digital voice electric signal into an optical signal and sends the optical signal; a signal receiving end receives the optical signal, converts into an analogue voice electric signal, converts the analogue voice electric signal into a digital voice electric signal, converts the digital voice electric signal into an analogue voice electric signal and converts the analogue voice electric signal into a voice signal. According to the invention, the voice signal is transmitted through a visible optical signal, the electromagnetic interference is reduced, the damage to peripheral sensitive electronic equipment is avoided, and the system cost and the complexity are effectively reduced by using an LED illumination system.