{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Audio & Video Technology-3

Audio & Video Technology-3 - Audio&VideoTechnology...

Info icon This preview shows pages 1–19. Sign up to view the full content.

View Full Document Right Arrow Icon
Audio & Video Technology
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Quick Facts Bandwidth of an FM channel: 200 kilohertz Bandwidth of a digital television channel: 6  megahertz First high-definition TV broadcasts:  1998 Cost of 51” digital HDTV set (1999): $5,000 Cost of 51” digital HDTV set (2006): $1,699
Image of page 2
Technology, Why is it Important? Establishes Parameters for Electronic  Media Operations Directly Affects Economics of  Electronic Media Justification for Regulation of  Electronic Media
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Basic Principle of Media Technology Facsimile Technology  - All modes of mass  communication based on this process of  copying
Image of page 4
Basic Principle of Media Technology Fidelity  - a way to describe how faithfully a  facsimile represents the original High Fidelity is reproduction that closely  approximates the original signal Radio waves can be used to transmit  facsimiles of pictures and sounds
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Signal and Noise Signal - the amount of program  Noise - the amount of interference Signal to noise ratio - the amount of signal present  compared to the amount of noise
Image of page 6
Signal and Noise Analog signals are subject to varying amounts of  noise The farther away from the transmitter, the more noise is  present Digital signals are subject to less noise  interference than analog signals
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Transduction Transduction - the process of changing one form of  energy into another form Analog and digital broadcasting involves different  kinds of transductions Analog transmission loses fidelity at each phase of the  process  Digital technology reduces loss of fidelity in the  transduction process.
Image of page 8
Examples of Transduction Capturing sound of a bird chirping using a  microphone involves the transduction of sound  waves into electricity Transmitting the sound of the chirping involves  transducing the electrical energy into  electromagnetic energy At home, our antenna detects the transmitted  signal and begins to reverse the transduction  process
Image of page 9

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Transduction Television and radio signals begin as physical energy Commonly referred to as light waves or sound waves
Image of page 10
Electromagnetic Energy  
Image of page 11

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Electromagnetic Energy The Electromagnetic Spectrum
Image of page 12
Electromagnetic Energy Fundamental Characteristics Radiant--Moves through surrounding Space Constant Velocity: 186,000 miles per second Wavelike Motion
Image of page 13

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Waves:  
Image of page 14
Oscillation and the Waveform Oscillation - a basic  concept of audio and video  signal processing Examples - vibration of air  produced by our mouths  makes sound and  vibration of light make up  all the images  we see Electromagnetic waves  are  subject to oscillation
Image of page 15

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Wave Characteristics:  Amplitude   
Image of page 16
Wave Characteristics: Frequency  
Image of page 17

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Oscillation and the Waveform The oscillations of a  radio  wave defines its  frequency
Image of page 18
Image of page 19
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern