EED 502: UNIT 3.1.1

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EED 502 UNIT 3.1.1

• A MULTI MEDIA HARDWARE
• TOUR

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A MULTI MEDIA HARDWARE TOUR

• Hard ware can be grouped under the following
• Data capture devices
• Data storage technologies
• Data playback or display equipment

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Data Capture Devices

• Data Capture Devices include
• Video Cameras
• Digital Cameras
• Scanners
• Microphones
• Midi hardware

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Video Cameras

• Capture full motion images
• Store images in digital data
• Mostly inexpensive appliance
• Inexpensive cameras resolutions can be poor

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Digital Cameras

• Similar in function to regular cameras film,
  its development and processing eliminated.
• Images stored in digital format
• Data recognized by computer and added to any
  multimedia product

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Scanners

• Scanners digitize flat already developed images
  including photographs, drawings, pages of text
• Page scanners are either gray-scale scanners that
  work well with black-and-white photographs or
  color scanners that can record millions of colors.

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Microphones

• Microphone are designed to pick up and amplify
  incoming acoustic waves or harmonics precisely
  and correctly and convert them to electrical
  signals. Depending on its sensitivity, the
  microphone will pick up the sound of someone's
  voice, sound from a musical instrument, and any
  other sound that comes to it. Regardless of the
  quality of the other audio-system components, the
  true attributes of the original sound are forever
  lost if the microphone does not capture them

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Midi Hardware

• Midi stands for Musical Instrument Digital
  Interface.
• It is a standard agreed by all manufacturers of
  musical instruments.
• This standard allows musical instruments to be
  hooked to each other and therefore communicate.

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Data Storage Devices

• Data Capture Devices include
• Optical Discs
• CDs
• DVDs
• External Drives
• External Hard Discs
• Pen Drives
• Computer Network Storage
• Cloud

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Optical Discs

• Optical storage offers much higher storage
  capacity than magnetic storage cassettes.
• Two very popular devices with consumers are the
  CD-Rom Compact Disc and the DVD digital
  versatile disc.
• A good medium for storing and distributing
  multimedia products that are full of graphics,
  audio, and video files. CDs can hold up to 650
  MB while some DVDs can hold up to 17Gigabytes.
• Another value to these two devices is the speed
  at which they transfer data to the computer
  from a low 300KB 2x/sec to higher than 24x/sec.

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External Drives

• The USB Universal Serial Bus - top image and
  the External Hard Disc drives lower image are
  designed to interconnect with PCs to keyboards,
  mice, joysticks, telephones, and low-end scanners
  daisy chain configuration.
• Speed and storage capacity rather limited.
• External hard drives store your valuable data and
  add a considerable level of safety and security.
  This is because external hard drives are located
  outside the computer and allow you to keep a
  backup copy of all your important files - your
  tax records, email archives, photos, and more.
• They connect to computers via a USB cable.

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Network Storage

• A network-attached storage (NAS) device is a
  server that is dedicated to nothing more than
  file sharing.
• NAS does not provide any of the activities that a
  server in a server-centric system typically
  provides, such as e-mail, authentication or file
  management.
• NAS allows more hard disk storage space to be
  added to a network that already utilizes servers
  without shutting them down for maintenance and
  upgrades.
• With a NAS device, storage is not an integral
  part of the server. Instead, in this
  storage-centric design, the server still handles
  all of the processing of data but a NAS device
  delivers the data to the user.
• A NAS device does not need to be located within
  the server but can exist anywhere in a LAN and
  can be made up of multiple networked NAS devices.

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Cloud Computing

• Cloud storage is a service model in which data is
  maintained, managed and backed up remotely and
  made available to users over a network (typically
  the Internet).
• There are three main cloud storage models
• Public cloud storage services, such as Amazon's
  Simple Storage Service (S3), provide a
  multi-tenant storage environment thats most
  suitable for unstructured data. 
• Private cloud storage services provide a
  dedicated environment protected behind an
  organizations firewall. Private clouds are
  appropriate for users who need customization and
  more control over their data. 
• Hybrid cloud storage is a combination of the
  other two models that includes at least one
  private cloud and one public cloud
  infrastructure. An organization might, for
  example, store actively used and structured data
  in a private cloud and unstructured and archival
  data in a public cloud.  

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Data Display Devices

• Data Display Devices include
• Projection Systems
• Document Cameras
• Monitors
• Speakers

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Data Projectors

• A device that projects computer output onto a
  white or silver fabric screen that is wall,
  ceiling or tripod mounted. It is widely used in
  classrooms and auditoriums for instruction and
  slide presentations.
• A data projector has a VGA socket for computer
  screen input at resolutions such as 800x600,
  1024x768 and 1280x1024. Many units also support
  TV with a composite video input for a VCR, DVD or
  cable box. Some projectors support all the analog
  and digital TV interfaces and are used for home
  theater projection
• These are increasingly getting smaller, lighter
  and more powerful.

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Document Cameras

• A visual presenter or document camera is a device
  that captures visual images by using a video
  camera mounted vertically on a base. The video
  image is then converted to an electronic signal
  that can be transmitted, using a video cable, to
  a data projector, a video monitor, a computer, a
  TV,  or to a communications network to be
  received at a remote location.
• Each visual presenter is designed to meet certain
  needs portability, high visual resolution, and
  multiple audio-visual input and output
  connections.
• The visual presenter can act as a connection and
  switching device for a computer generated  "Power
  Point" presentation, a video tape player, DVD or
  CD players, digital cameras, printed text  and 3
  dimensional objects.
• The visual presenter provides a new level of
  visual communication in education, legal or
  business presentations. It is an extremely
  versatile tool for audio and video integration
  into a presentation.

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Monitors

• The monitor displays the video and graphics
  information generated by the computer through the
  video card. Monitors are very similar to
  televisions but usually display information at a
  much higher resolution.
• A monitor, no matter the type, connects to either
  a VGA or DVI port on a video card. Before
  investing in a new monitor, make sure that both
  devices support the same type of connection.

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Speakers

• Computer speakers, or multimedia speakers, are
  speakers external to a computer, that disable the
  lower fidelity built-in speaker. They often have
  a low-power internal amplifier. The standard
  audio connection is a 3.5 mm (approximately
  1/8 inch) stereo jack plug often color-coded lime
  green (following the PC 99 standard) for computer
  sound cards.
• Computer speakers are typically packaged with
  computer systems. They are small, plastic, and
  have mediocre sound quality. Some computer
  speakers have equalization features such as bass
  and treble controls.
• High end loudspeaker systems are
  electromechanical transducers which convert
  electrical signals into sound. The term
  Loudspeaker is used to refer to both the device
  itself, and a complete system consisting of one
  or more loudspeaker drivers (as the individual
  units are often called) in an enclosure. The
  loudspeaker is the most variable element in an
  audio system, and is responsible for marked
  audible differences between systems.