Conversion of speech to Braille: Interaction device for visual and hearing impaired

Abstract

This research paper describes the implementation of a prototype device for both Visual and Hearing impaired persons get information from Speech converting to Braille output. For this interaction device HM2007 IC is used. The input is by receiving the speech signal and to recognize the digits. Once the spoken digit has been recognized, the DSP processer will send the corresponding ASCII code to the PIC with necessary encoded information. The output of this system is a Braille Display. The PIC microcontroller takes the encoded input from the DSP, decodes it and sends the appropriate recognized Braille cell trough the Solenoid Driver. The entire system is implemented with receiving digits of the Tamil Thirukural as speech signal and the output of the digits is tested with the Tamil Thirukural embossing every letter with delay time.