CONTROL OF HOME APPLIANCES THROUGH VOICE

CONTROL OF HOME APPLIANCES THROUGH VOICE

ABSTRACT:

In daily life, there will be many situations where it happens to return all the way from office to home to switch on or off the device, which is very difficult. That is the situation where we imagine a system, which enable us operating devices from remote locations. When not only far away from home but also when busy at home, we imagine of operating our appliances through voice either it be AC, heater, coffee pot, microwave, lamp or any other appliance. This is no more imagination now.

The digital processing capabilities of microcontrollers (MCUs) allow penetration of voice control to embedded systems. Practically any new device containing a microcontroller Unit (MCU) could be controlled by voice. This paper emphasizes on controlling of lights and heat Using DSP56F805 with Integrated Simple Voice Control. Two basic algorithms that can be used for speech recognition are DTW(Dynamic Time Warping) and HMM(Hybrid Markov Models).This system uses DTW algorithm(speaker dependent) which has fewer requirements on hardware and less speech data in the "training" phase.

Current system for lights and heating control can be generalized for controlling any device with a limited command set. Speaker dependence is the main restriction but “new” algorithms based on hidden Markov models (HMM) adapted to the MCU environment are going to change this situation soon as DSP56F805 has 32.5K Flash program memory so the recognition algorithm can be easily upgraded.

Introduction:

Incorporation of embedded voice control capability is described for light and heat control .This solution can be re-purposed to other types of embedded systems that require voice control with a limited command set. However, one noticeable limitation of voice control is audio/T.V systems as it is difficult to separate the speech of the user (commands) from the other audio signals. As the digital home becomes a reality, control mechanisms for everyday appliances are growing beyond the traditional touch screens, keypads and remote control units to include voice command. Voice recognition systems can now be added easily and inexpensively to practically any new home appliance.

Digital signal processing capabilities integrated with microcontroller (MCU) functionality enable voice control capability to be added to Embedded Systems (computers that are generally a combination of hardware and software designed to perform a dedicated function and are often part of a larger system or product). MCUs are today used in thousands of electronic products and systems in which many decisions or calculations are required. Such systems monitor and control everything from spacecraft to robots and factory equipment, home appliances, security systems, automobiles, VCRs and TVs, cellular telephones and personal digital assistants -- virtually any electronic device used in our everyday lives. A new breed of digital signal processor (DSP)-controllers have emerged that provide the performance required for real-time speech processing as well as the traditional MCU features needed for control functions.


for more info visit.
http://www.enjineer.com