This lesson introduces you to the concepts of “signals” and “signal processing” with computers. You will develop an appreciation for the incredible breadth of signal processing applications. You will also gain valuable perspective of key historical factors that have shaped the field. This information lays the foundation for you to be able to apply signal-processing methods across the broad range of current and future applications.
Key Concepts and Transcript
Signals Everywhere Quiz1. Which of the following could be considered a signal? Select all that apply.
a) Wind speed each hour of the week
b) Number of centimeters in a meter
c) The color of your eyes
d) Transmission from a cell phone to the base station
e) Amount of memory in your computer
f) The number of times you blink each minute over the course of a day
2. Which of the following could be a signal-processing problem? Select all that apply.
a) Removing a satellite trail from an image of the night sky
b) Combing your hair
c) Converting a song from audio to a form that can be efficiently stored on your MP3 player
d) Using GPS satellites to determine your position on the earth
e) Distinguishing a malignant from benign tumor in medical image
f) Making a peanut butter and jelly sandwich
3. Identify which of the following factors have contributed to the growth of the field of signal processing.
a) Increased computing capabilities and miniaturization of digital computers
b) Development of computationally efficient algorithms
c) Discovery of new synthetic fertilizers
d) Development of effective algorithms and theory that address important applications
e) Invention of the wheel