rtvf 44 quiz 1

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  1. CCDs
    parts inside of the camera that change the light focused on them by the lens into electrical signals, voltages
  2. CCDs are developed from
    the same type of solid state silicon chip technology that made computers and radios small and cheap
  3. pixels
    rows of photosensitive elements, photo elements
  4. number of pixels on a CCD is defined by its
  5. brighter the light...
    the higher the voltage
  6. pixels are read
    left to right and top to bottom into a memory fed out horizontally line by line
  7. CCDs have to have a minimum of ____ pixels
  8. high quality cameras have ___ CCDs 
    three (RGB)
  9. subtractive colors
    red, green, yellow. reflect light off themselves. not video.
  10. additive color
    used in video, depends on the color of light itself.
  11. absence of cool gives you 
  12. complimentary colors
    mixing equal parts of two additive colors makes a complimentary color. red+green= yellow red+blue=magenta blue+green=cyan
  13. white light is
    59% green, 30% red, 11% blue
  14. color temperature
    measures color characteristics of light
  15. high color temperature
    more blue
  16. low color temperature
    more orange
  17. sunny day is
  18. home light 
  19. filter wheel
    place one of several filters between the lens and the beam splitter
  20. black balance
    ensures there is no color, each color channel is set to 7.5 NTSC or 0 PAL
  21. white balance
    electronic circuitry of camera adjusts light reception for green CCD 59% of picture, red CCD 30%, blue CCD 11%
  22. Color television adopted in US
  23. to make color tv
    engineers took the Y (luminance, mostly green) signal and added a R-Y signal and B-Y signal
  24. digital encoding ratio
    relationship of how much luminance and how much chrominance information are encoded digitally. international broadcast standard is 4:2:2
  25. encoding
    process of combining 3 color signals
  26. encoding signal
    composite signal, compresses the chroma signal and luminance signal
  27. composite: separate luminance signal is formed by
    skimming brightness information with each of the CCDs then is recombined with chroma signal
  28. home video cameras 
    one chip, filter of colored stripes in front breaks up light into 3 primary colors, circuitry then combines stripes of color into a composite color picture
  29. camera flow
    camera 1 to CCU. CCU has outputs labeled Video Out, R,G, and B. Video Distribution Amplifier. 
  30. Test and Measurement Switcher to _____ to _______
    Vectorscope and Waveform
  31. first Video Distribution Amplifier
    goes to main monitor wall for the director
  32. second VDA 
    goes to video control area
  33. third VDA
    goes to production switcher
  34. final VDA
    goes to patch panel like switch boards, tie all components together
  35. problems of composite picture
    component signals must be re-encoded before the composite signal can be sent from each piece of video equipment
  36. component video
    taking the separate RGB outputs from each camera and running them directly to the switcher bypasses the entire encoding circuitry of the camera, 3 cables need to be installed for every 1 that is before
  37. less expensive component system that produces higher quality than composite
    Y/C sometimes called S
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rtvf 44 quiz 1
2013-02-05 04:57:24

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