TEXT INFORMATION RECONSTRUCTION SYSTEM AND ITS METHOD FOR DID USING LED COMMUNICATION

摘要

PURPOSE: A text information reconstruction system for a DID(Digital Information Display) and a method thereof are provided to listen to audio by receiving audio signals from a unspecific DID using an application in a smart phone. CONSTITUTION: A DID(1) modulates an image signal and outputs a replacing image(5) signal which is modulated and includes text information on a screen. A camera in a smart phone(4) is inputted with a DID image(3) in a state that a user watches a part of the DID image with the camera in the smart phone. The text information is transmitted through one or more channels according to the quantity of the information. The smart phone analyzes the replacing image which is inputted through the camera in the smart phone. The smart phone reconstructs the text information included in the replacing image and outputs the text information.