Remote Control using Mobile through Spoken Commands

Mobile phone can serve as powerful tool for world-wide communication for even roaming user. A system is developed to extend the capability of mobile phone for remote monitoring and control of devices. One mobile in this system is dedicated for receiving and executing commands from authentic users and informing status about change in input to the user through SMS. Mobile phone model 6610 is used for experimentation through AT commands protocols. The software algorithm is developed to generate text message from spoken commands of user through extraction of features like Cepstral coefficients, short time energy and zero crossing rate and multi layer feed-forward Neural Network is used for recognition of suitable words. The derived text message is then sent as SMS to the mobile connected to control system through PC. On receiving SMS, the system responds by activating appropriate port bits. The system is also designed to send SMS to specified mobile user if there is a change in the status of the input ports. The various applications of the system are described and further modifications and possibilities are discussed