class4 - Changes in TV and Video Case Study The Digital TV...

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1 Changes in TV and Video Case Study: The Digital TV Transition Electromagnetic Spectrum Aspects affecting tv viewing • Aspect ratio • Resolution • Technical standard
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2 Great moments in TV history • Use of film for pre-recording tv • Development of color tv • Development of videotape • Using Ultra high frequencies UHF • Cable tv Aspect Ratios Not your father’s tv…. U.S. technical standard is 525 NTSC now HDTV 1080 625 PAL - developed in France 819 SECAM - developed in Japan
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3 Persistence of vision • Images to the eye “fool” the brain into thinking the image looks like it is complete, and “solid” New screen forms: • Flat-screen tv • LED--light emitting diodes • LCD--liquid crystal display Wireless TV • Uses WiFi or WiBro: can have multiple functions-- --television --computer --telephone
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4 Digital TV • Originally planned for implementation by 2002 • Cost to broadcasters to change transmission standards • Why?
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class4 - Changes in TV and Video Case Study The Digital TV...

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