EMC 2410 Lecture 10 Spinning Discs and Biscuit TIns


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  • EMC 2410 Lecture 10 Spinning Discs and Biscuit TIns

    1. 1. EMC 2410 Intro to Electronic Media Edward Bowen Lecture Ten Television Begins
    2. 2. Just What is Television? <ul><li>Television is the electronic dissemination of still images in rapid enough succession to create the illusion of motion, and synchronized with sound. </li></ul>
    3. 3. And How Does Television Work? http://www.youtube.com/watch?v=UivqdpliyA0
    4. 4. Basic Image Formation <ul><li>Persistence of Vision and Moving Pictures. </li></ul>http://www.youtube.com/watch?v=3veFqnnob0A
    5. 5. Basic Image Formation <ul><li>Persistence of Vision and Moving Pictures. </li></ul>http://www.youtube.com/watch?v=0t9Edrlk7gc
    6. 6. Basic Image Formation <ul><li>1948: How Does A TV Work </li></ul>http://www.youtube.com/watch?v=tb_EXSIfHjA
    7. 7. Basic Image Formation <ul><li>1948: How Does A TV Work </li></ul>http://www.youtube.com/watch?v=qnu9jvgrq58
    8. 8. Basic Image Formation <ul><li>Cathode Ray Tube (CRT) </li></ul><ul><li>Phosphorus Dots / Pixels </li></ul>http://www.youtube.com/watch?v=D3OSTflMO80
    9. 9. Basic Image Formation <ul><li>Cathode Ray Tube (CRT) </li></ul><ul><li>RGB (Red, Green, Blue) </li></ul><ul><li>Phosphorus Dots / Pixels </li></ul>http://www.youtube.com/watch?v=cAZQxKaj8dk
    10. 10. Basic Image Formation <ul><li>Electron Gun </li></ul><ul><li>Steering Coils </li></ul><ul><li>Phosphorus Screen </li></ul>http://www.youtube.com/watch?v=GATkRMe_fl8
    11. 11. Basic Image Formation <ul><li>Scanning </li></ul><ul><li>Fields / Frames </li></ul><ul><li>Flicker Frequency: Flashes per second </li></ul><ul><li>Frames per second </li></ul><ul><li>http://videos.howstuffworks.com/discovery/29889-assignment-discovery-tv-and-flicker-frequency-video.htm </li></ul>
    12. 12. Early Development <ul><li>1884 - Paul Nipkow proposed and patented the first mechanical television system. He devised the notion of dissecting the image and transmitting it sequentially. To do this he designed the first television scanning device. He was 24 years old. </li></ul>
    13. 13. Early Development <ul><li>1900 - The first known use of the word &quot;television, or “to see from a distance” occurs at the World's Fair in Paris. </li></ul>
    14. 14. Early Development <ul><li>Inventors attempt to build mechanical television systems based on Nipkow's rotating disks or </li></ul><ul><li>Inventors attempt to build electronic television systems based on the cathode ray tube developed independently in England and Russia in 1907. </li></ul><ul><li>American Charles Jenkins and Scotsman John Baird follow the mechanical model while </li></ul><ul><li>Philo Farnsworth, working independently in San Francisco, and Russian emigrant Vladimir Zworkin, working for Westinghouse and later for RCA under David Sarnoff, advance the electronic model. </li></ul><ul><li>Electronic television systems eventual replaced mechanical systems. </li></ul>
    15. 15. Who is the Father of Television? John Logie Baird Philo Farnsworth Vladimir Zworykin
    16. 16. Or ? David Sarnoff
    17. 17. John Logie Baird Scottish by birth. Calvinist by upbringing. Loner. Driven. Tireless. Working in obscurity and poverty. He is considered the inventor of mechanical television, basing his system on the the Nipkow Disc.
    18. 18. Baird - The Televisor <ul><li>1923 - Baird patents his television design. </li></ul><ul><li>1924 - He builds a working prototype, the &quot;Televisor.&quot; </li></ul><ul><li>It has a motor mounted in a tea chest , with a home-made Nipkow disc (a cardboard circle cut from a hat box ), a darning needle for a spindle, and a discarded biscuit box as a lamp housing, all assembled with sealing wax and string . </li></ul><ul><li>Apart from the motor, his greatest investments are a few bull's-eye lenses, costing four pence each. </li></ul><ul><li>He transmits a silhouette of a cross two or three yards. </li></ul>
    19. 19. Baird - The Televisor <ul><li>October 2, 1925 - In his laboratory, Baird transmits the first grayscale television picture, the head of a ventriloquist's dummy nicknamed &quot;Stooky Bill,&quot; in a 30-line vertically scanned image, at five pictures per second. </li></ul>
    20. 20. Baird - The Televisor <ul><li>He proceeds with public demonstrations … </li></ul>
    21. 21. Baird - The Televisor <ul><li>And the media think him mad … </li></ul>
    22. 22. Baird - The Televisor <ul><li>1926 - Baird demonstrates a fully working prototype of mechanical television, with grayscale moving images, to members of the Royal Institution at Baird's residence and laboratory. </li></ul>http://www.youtube.com/watch?v=PmjXwU0pYao
    23. 23. Baird - The Televisor http://www.dailymotion.com/video/xcz4k7_milestones-in-science-engineering-n_shortfilms http://www.hulu.com/watch/135526/milestones-in-science-and-engineering-nipkow-baird-zworykin-the-development-of-television
    24. 24. Baird - The Televisor http://www.youtube.com/watch?v=9DFcYRxFdTI
    25. 25. Baird - The Televisor http://www.youtube.com/watch?v=8GYGxEk0btA
    26. 26. Baird - The Televisor http://www.youtube.com/watch?v=D-yO07MQPMA
    27. 27. Baird - The Televisor <ul><li>1927 - Baird sends a cable transmission 438 miles to Glasgow. </li></ul><ul><li>1928 - Baird transmits images across the Atlantic Ocean. </li></ul><ul><li>1929 - With the BBC (British Broadcasting Corporation), Baird begins experimental broadcasts. </li></ul>
    28. 28. Baird - The Televisor “ The Man With the Flower in His Mouth (1930) - the first televised drama produced in Britain, screened by the BBC as part of their experimental transmissions. http://www.youtube.com/watch?v=RJoYskwKxsM
    29. 29. Baird - The Televisor <ul><li>1935 - Scheduled electronic television broadcasting begins in England, alternating between Baird’s and a competing system. </li></ul><ul><li>Popular Mechanics articles described the competition. </li></ul>
    30. 30. Baird - The Televisor <ul><li>Some 20,000 Baird Televisors would be </li></ul><ul><li>sold across England and the Continent. </li></ul>
    31. 31. Baird - The Televisor <ul><li>Baird moves on to </li></ul><ul><li>Color Television (demonstrated in 1928) </li></ul><ul><li>Big Screen TV </li></ul><ul><li>Open Air Projections for Large Audiences </li></ul><ul><li>High Definition Television </li></ul><ul><li>3-D Television </li></ul><ul><li>Before passing away in 1946. </li></ul>
    32. 32. Baird - The Televisor http://www.youtube.com/watch?v=upoWPhjZksk
    33. 33. Baird - The Televisor http://www.youtube.com/watch?v=LGzFz2Nrq6s
    34. 34. Baird - The Televisor http://www.youtube.com/watch?v=y6O_I9l1kok
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