Multimedia Systems Components

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24 Questions

What type of multimedia system involves the capture and/or generation of information by retrieving stored objects?

Orchestrated multimedia

What is an example of static multimedia?

Image

What type of multimedia system involves information being read or viewed in a continuous sequence?

Linear multimedia

What is an example of dynamic multimedia?

Audio

What is the unit of organization in digital images?

Pixels

What is a type of storage device used in multimedia systems?

Zip drive

What is a characteristic of real-time multimedia systems?

Rendering multimedia data in real-time

What determines the number of bits assigned to each pixel in an image?

Bit depth

What is the term for the number of frames displayed per second in a video?

Frame rate

What is a type of capture device used in multimedia systems?

Video Camera

What is a type of display device used in multimedia systems?

CD-quality speakers

What is the process of converting frames of video into a one-dimensional signal for broadcast?

Scanning

What is the unit of audio information in digital audio?

Sample

How often are samples taken in digital audio, measured in kilohertz?

Sampling rate

What is the term for the number of channels contained in a digital audio signal?

Dimensionality

What is a characteristic of multimedia data that refers to the size of data resulting from combining different types of media?

Voluminous

What is the primary concern of the storage and compression process in multimedia systems?

Available storage medium and the size of stored media

What is the main goal of compression in multimedia systems?

To reduce the size of multimedia data while maintaining quality

Which of the following is NOT a key process in multimedia systems?

Hardware optimization

What is the relationship between storage medium and compression in multimedia systems?

Storage medium determines the level of compression required

Why is compression essential in multimedia systems?

To reduce the size of multimedia data

What is the primary challenge in storing multimedia data?

The large size of multimedia data

What is the role of compression in multimedia systems?

To reduce the size of multimedia data while maintaining quality

Why is storage capacity a concern in multimedia systems?

Due to the large size of multimedia data

Study Notes

Images

  • Images consist of a set of units called pixels organized in a 2D array
  • Each pixel has a bit depth, which is the number of bits assigned to each pixel

Video

  • Video is a sequence of images (frames) with the same spatial parameters
  • Frame rate (fps) measures the number of frames displayed per second
  • Aspect ratio defines the ratio of the width to height, commonly 4:3
  • Scanning format converts frames into a 1D signal for broadcast

Audio

  • Digital audio is characterized by a sampling rate in Hertz
  • Sampling rate measures how often samples are taken (in kilohertz)
  • Sample size represents the number of bits used to represent each sample's value (8-16 bits)
  • Dimensionality refers to the number of channels in the signal

Graphics

  • 2D/3D graphic elements are represented by vector coordinates
  • Graphics have properties like fill color, boundary thickness, and more

Inherent Qualities of Multimedia Data

  • Multimedia data can be analogue or digital, but digital is the primary concern
  • Data is voluminous, interactive, and requires real-time transmission and synchronization

Multimedia Definition

  • Multimedia consists of applications that combine different media types (text, graphics, photos, audio, video, animation)

Multimedia Information/System

  • Multimedia information consists of one or more media types (text, audio, video, 2D/3D graphics, animation)
  • A multimedia system processes, stores, generates, manipulates, and renders multimedia information

Characteristics of Multimedia Systems

  • Digitized: all media are represented in digital format
  • Distributed: information is remote, stored or produced in real-time, and distributed over networks
  • Interactive: users can affect received information and send their own
  • Integrated: media are treated uniformly, presented in an orchestrated way, and can be manipulated independently

Key Issues for Multimedia Systems

  • Three main processes: content creation, storage and compression, and distribution

Components of a Multimedia System

  • Capture devices: video cameras, microphones, keyboards, graphics tablets, and more
  • Storage devices: hard disks, CD-ROMs, Zip drives, DVD, etc.
  • Communication networks: Ethernet, ATM, Intranets, Internets
  • Computer systems: multimedia desktops, workstations, MPEG/VIDEO/DSP hardware
  • Display devices: CD-quality speakers, HDTV, SVGA, Hi-Res monitors, color printers, etc.

Classification of Multimedia Systems

  • Classification by interaction style, number of users, live content, and more
  • Static vs. dynamic: static (discrete media) includes text, image, graphics, while dynamic (continuous media) includes audio, video, animation
  • Real-time vs. orchestrated: real-time multimedia requires delivery and rendering in real-time, while orchestrated multimedia involves capturing and generating information
  • Linear vs. nonlinear: linear multimedia has a continuous sequence, while nonlinear multimedia has a non-sequential structure

Learn about the essential components of a multimedia system, including capture devices, storage devices, and communication networks.

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