Voice-Activated Television Remote Control (VAR) Senior Design I Final Presentation [1]

VAR Team Members Team Leader Electrical Engineer Design Hardware Documentation Computer Engineer Website Voice Recognition Coding PIC programming Computer Engineer Website Voice Recognition Coding PIC programming Adviser: Dr. Pan Li Electrical Engineer Hardware Research Debugging Melissa Webb David Trosclair Bobby Britton Bader Yaseen

Outline Problem Solution Constraints Technical Practical Testing Prototype Future Tasks Questions

Problem and Solution

Problem Some people do not have the ability to operate a standard hand-held television remote control. Our market is the elderly and/or disabled. “During the 20 th century, the number of people in the United States aged 65 or over increased by a factor of 11, growing from 3 million to 33 million” [2, 3].

Solution The VAR will allow users to operate their television by using voice commands. By speaking into a microphone, the user is able to control 6 key functions of the television: - Power- Mute - Volume Up- Volume Down - Channel Up- Channel Down

What is the VAR? The user will speak the commands into a microphone attached to a computer with our voice recognition software. The software will translate and wirelessly send the signal to the VAR. A microprocessor will convert from the wireless input to an IR signal and output to the television. VAR

Technical and Practical Constraints

Technical Constraints NameDescription Power Supply The VAR must operate from a standard 120V wall outlet. Response Time Target time for complete process is less than two seconds. Transmission Distance The wireless signal and the IR signal’s maximum distances are 15 feet. Voice CommandsThe VAR will recognize six vocal commands. IR Accuracy The IR signal must be transmitted and received accurately 98% of the time.

System Overview

Practical Constraints NameDescription Product SizeThe VAR will be no larger than 8” x 8” x 3”. Operating SystemThe VAR will be Windows OS compatible.

Practical Constraints Manufacturability: Product Size The VAR will be no larger than 8’’ x 8’’ x 3’’. Convenient for user Easily fits into any space Portable Comparable to devices such as modems and routers

Practical Constraints Manufacturability: Operating System The VAR software will be Windows OS compatible. Microsoft Windows is one of the most commonly used operating systems for personal computers [4]. Executable files of the program can easily be made.

Testing

Testing: Voice Recognition Software

Extra Functions: Volume Up/Volume Down- Intervals of 5 Channel Numbers- 1 through 9 Channel Key Words- PlayStation: TV’s Input Channel (A/V)

Testing: Voice Recognition Software UserPercent Error for each User (%) Power Volume Up Volume Down Channel Up Channel Down Mute Bader Bobby00010 David Melissa000010

Testing: Bluetooth

Char value sent from Bluetooth transmitter to Bluetooth receiver. Each command has a char value.

Testing: Microcontroller

Testing: IR Transmitter Accuracy CommandAccuracy (%) 15 ft. Straight Ahead 15 ft. 15° to right 15 ft. 15° to left Obstructed View Power100 0 Volume Up100 0 Volume Down100 0 Channel Up100 0 Channel Down100 0 Mute100 0

Testing: Latency CommandTime (s) Power0.65 Volume Up0.66 Volume Down0.61 Channel Up0.70 Channel Down0.73 Mute0.51

Testing: Sunny Day Case User enters correct COM port VAR is connected User says key word “Listen” Command is recognized User says command “Power” Television responds by turning on or off

Testing: Sunny Day Case

User enters the correct COM port. Software informs user that the COM port is closed i.e. VAR is off VAR still tries to connect. Once the connection is made, the VAR is connected and normal operation continues. Testing: Rainy Day Case- Bluetooth not Connected

Testing: Rainy Day Case- Unrecognized Command User enters the correct COM port VAR is connected User says key word “Listen” Command is recognized User says command “Power” Command is not recognized User prompted to repeat command

Testing: Rainy Day Case- Unrecognized Command

Working Prototype

Breadboard

On/Off Switch

Breadboard Status LED

Breadboard BlueSMiRF Silver Bluetooth Receiver

Breadboard PIC24HJ64GP502

Breadboard IR Transmitter

VAR System Setup

TV

VAR System Setup VAR

VAR System Setup PC

VAR System Setup Mic

Video

Future Tasks

Software Refinement PCB Design using Eagle layout PCB Populating Enclosure Testing

AugustSeptemberOctoberNovember Software Refinement PCB Design PCB Populating Enclosure Testing Timeline

Enclosure

References [1] (2012, February 18). “Elderly Couple Watching TV,” in fotosearch. [Online]. Available: [2] F. Hobbs. (2012, January 21). “The Elderly Population,” in U.S. Census Bureau. [Online]. Available: [3] (2012, January 21). “Sixty-Five Plus in the United States,” in U.S. Census Bureau. [Online]. Available: [4] (2012, February 18). “Operating System,” in StatCounter Global Stats. [Online]. Available:

Voice-Activated Television Remote Control (VAR) Senior Design I End-Semester Presentation Questions?