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Video Cameras

Video Cameras. Mr. Gorman Media Literacy Harrison Prep 2011-12. What is a Video Camera?. A video camera is a camera used for electronic motion picture acquisition, initially developed by the television industry but now common in other applications as well. What is a Video Camera?.

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Video Cameras

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  1. Video Cameras Mr. Gorman Media Literacy Harrison Prep 2011-12

  2. What is a Video Camera? • A video camera is a camera used for electronic motion picture acquisition, initially developed by the television industry but now common in other applications as well.

  3. What is a Video Camera? • Video cameras are used primarily in two modes: • The first, characteristic of much early broadcasting, is live television, where the camera feeds real time images directly to a screen for immediate observation. • A few cameras still serve live television production, but most live connections are for security, military/tactical, and industrial operations where surreptitious or remote viewing is required.

  4. What is a Video Camera? • In the second mode the images are recorded to a storage device for archiving or further processing; for many years, videotape was the primary format used for this purpose, but optical disc media, hard disk, and flash memory in tapeless camcorders are all increasingly used.

  5. What about Video Cameras? • Modern video cameras have numerous designs and uses, not all of which resemble the early television cameras. • Professional video cameras, such as those used in television production and sometimes filmmaking in digital cinema; these may be television studio-based or mobile in the case of an electronic field production (EFP). • Such cameras generally offer extremely fine-grained manual control for the camera operator, often to the exclusion of automated operation.

  6. What about Video Cameras? • Camcorders, which combine a camera and a VCR or other recording device in one unit; these are mobile, and are widely used for television production, home movies, electronic news gathering (ENG) (including citizen journalism), and similar applications.

  7. What about Video Cameras? • Closed-circuit television (CCTV) generally use pan tilt zoom cameras (PTZ), for security, surveillance, and/or monitoring purposes. Such cameras are designed to be small, easily hidden, and able to operate unattended

  8. How does it work? • Most professional cameras utilize an optical prism block directly behind the lens. This prism block (a trichroic assembly comprising two dichroic prisms) separates the image into the three primary colors, red, green, and blue, directing each color into a separate charge-coupled device (CCD) or Active pixel sensor (CMOS image sensor) mounted to the face of each prism.

  9. How does it work? • In both single sensor and triple sensor designs, the weak signal created by the sensors is amplified before being encoded into analog signals for use by the viewfinder and monitor outputs, and also encoded into digital signals for transmission and recording. • The analog outputs are normally in the form of either a composite video signal, which combines the color and luminance information to a single output; or an R-Y B-Y Y component video output through three separate connectors.

  10. What will I need to learn? • ENG cameras manufactured bySony cameras have become the dominant style of professional video camera for most video productions, from dramas to documentaries, from music videos to corporate video training.

  11. What will I need to learn? • Operate the zoom and focus lens control.▪ • The camera mounts on tripods with Fluid heads and other supports with a quick release plate. • 3 CCDs or CMOSactive pixel sensors are used for each of the primary colors • They have interchangeable lenses. • A rotating behind-the-lens filter wheel, for selecting an 85A and neutral density filters. • All settings, white balance, focus, and iris can be manually adjusted, and automatics can be completely disabled. • Professional BNC connectors for video out and genlock in.▪Can operate an Electronic viewfinder (EVF) or external CRT viewfinder. • At least two XLR input connectors for audio are included are used than in consumer devices.

  12. What will I need to learn? • Direct slot-in for portable wireless microphones.▪Audio is adjusted manually, with easily accessed physical knobs. • A complete time code section • "Bars and tone" are available in-camera (the SMPTE color bars (Society of Motion Picture and Television Engineers) Bars, a reference signal that simplifies calibration of monitors and setting levels when duplicating and transmitting the picture. ) • Recording is to a professional medium like some variant of Betacam or DVCPRO or Direct to disk recording or flash memory. If as in the latter two, it's a data recording, much higher data rates (or less video compression

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