Implementation of the Embedded System for Visually-Impaired People

Since a 2-dimensional (2D) bar code can retrieve data and information quickly, it is widely used and recognized as a useful tool for many industrial applications. However, the information capacity of the 2D bar code is still limited. Recently the analog-digital code (AD code), which has the largest storage capacity yet contained in a code, has been developed, thereby expanding the bar code´s application range because it overcomes the limitation of data capacity. In this paper, we present the AD code and an effective embedded system which can transform text information into voice using the 2D AD code and Text To Speech (TTS). This voice information can also be transmitted to visually-impaired people by capturing the AD code on paper or in books.