Multimedia Hardware

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Multimedia Hardware

• Display Devices, Scanners, Digital Cameras,
  Digital Camcorders, Web Cameras

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Display Devices

• Computer Monitor
• CRT Monitor
• LCD Monitor
• Touch Screen
• Plasma
• Projector
• Ceiling Mounted LCD Projector
• Presentation Cart
• Document Camera

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Scanners

• A scanner captures images from photographic
  prints, posters, magazine pages etc.
• There are two types of scanner

Film Scanner
Flatbed Scanner
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Digital Camera

• A digital camera records and stores photographic
  images in digital format
• Once a picture is taken, it is stored in the
  digital cameras buffer and is compressed into
  JPEG format
• The compressed image is transferred to the memory
  card
• The images can be fed to a computer for further
  processing

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DV Camcorders

• A DV Camcorder, or called a digital video camera,
  captures full-motion images and sound into
  digital data
• The CCD (Charged Coupling Device) in a DV
  camcorder is used to capture video
• The quality of video a digital video camera
  (resolution) can produce depends on the amount of
  detail the CCD can detect
• Measured in pixels (in terms of Mega pixels (e.g.
  1488 times 1728)
• The captured video is exported to the video
  editing software for further processing

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Hard Drive Camcorders

• No tapes, no discs, it stores video and images
  (photos) on an internal hard disk drive
• The video file can be transferred to a PC
• 30GB can store up to 7 hours of DVD quality video

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Web Cameras

• A Web camera is a device that allows you to send
  real time video over the Internet. You can also
  use a Web camera to record videos that you can
  save on your computer
• The quality of the images produced by a Web
  camera is determined by its resolution and speed
• Web cameras can commonly transfer video a speed
  of 15 frames per second and a resolution of 640 x
  480 pixels or a speed of 30 frames per second at
  a resolution of 352 x 288 pixels
• Web camera are often used for videoconferencing
• Videoconferencing allows you to have face-to-face
  conversations with people on the Internet or
  other networks

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DVD Recorder

• transfer video from TV or camcorder to DVD discs
• DVD formats
• DVDRW, DVDR supported by PHILIPS SONYDVDR
• DVD-RW,DVD-R supported by PIONEER
• DVD RAM supported by PANASONIC

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MPEG4 Player (Pocket TV, PMA)

• MPEG4 is a digital compressed format in coding
  audio-visual information

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Digital Audio Recorders

• MD Recorder
• Sound is recorded digitally on a small magneto
  optical disc contained in a protective shell
  (called a Mini-Disc)
• Record sound in high quality (at audio CD
  quality)
• The audio data can be loaded to a computer
• MP3 Recorder
• Suitable for low-quality voice-only materials
• The audio data can be loaded to a computer very
  efficiently

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MP3 Player

• recent evolution of music format
• fit into a device about the size of a deck of
  cards
• create personalized music lists and carry
  thousands of songs and recordings wherever we go.
  

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Capturing Multimedia Contents(Demonstration)

• Capturing Audio (Audacity)
• Editing Sound http//www.fed.cuhk.edu.hk/etu/howt
  o/sound/sound.htm
• Capturing Video (Pinnacle Studio)
• http//www.fed.cuhk.edu.hk/etu/howto/capture/captu
  re_eng.htm
• On-line help for MMPC
• http//www.fed.cuhk.edu.hk/etu/mmpc.html