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Questions and Answers
What type of multimedia system involves the capture and/or generation of information by retrieving stored objects?
What is an example of static multimedia?
What type of multimedia system involves information being read or viewed in a continuous sequence?
What is an example of dynamic multimedia?
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What is the unit of organization in digital images?
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What is a type of storage device used in multimedia systems?
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What is a characteristic of real-time multimedia systems?
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What determines the number of bits assigned to each pixel in an image?
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What is the term for the number of frames displayed per second in a video?
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What is a type of capture device used in multimedia systems?
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What is a type of display device used in multimedia systems?
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What is the process of converting frames of video into a one-dimensional signal for broadcast?
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What is the unit of audio information in digital audio?
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How often are samples taken in digital audio, measured in kilohertz?
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What is the term for the number of channels contained in a digital audio signal?
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What is a characteristic of multimedia data that refers to the size of data resulting from combining different types of media?
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What is the primary concern of the storage and compression process in multimedia systems?
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What is the main goal of compression in multimedia systems?
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Which of the following is NOT a key process in multimedia systems?
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What is the relationship between storage medium and compression in multimedia systems?
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Why is compression essential in multimedia systems?
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What is the primary challenge in storing multimedia data?
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What is the role of compression in multimedia systems?
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Why is storage capacity a concern in multimedia systems?
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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
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Description
Learn about the essential components of a multimedia system, including capture devices, storage devices, and communication networks.
