Multimedia System and Design

1. Data Storage & Retrieval Or Playback
Techniques Or Methods
@mrzahidfaiz
Multimedia System and Design

2. Data storage is a general term for archiving data in electromagnetic or other
forms for use by a computer or device. Different types of data storage play
different roles in a computing environment.
Data retrieval means obtaining data from a database management system
such as ODBMS. In this case, it is considered that data is represented in a
structured way, and there is no ambiguity in data. In order to retrieve the
desired data the user present a set of criteria by a query.
Data Storage & Retrival Or Playback
@mrzahidfaiz

3. Multimedia Storage
Multimedia can be stored in mediums such as Optical Disks, Hard Drives, Magnetic
Storage Media and such.
Multimedia Retrieval
• Multimedia retrieval depends on the type of multimedia file it is which may be
continuous or discrete.
• Continuous media is data where there is a timing relationship between source
and destination. Video, animation and audio are examples of continuous media.
• Some media is time independent or static or discrete media: normal data, text,
single images, graphics are examples.
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4. Types Of Storages
Magnetic Disk
Magnetic storage or magnetic recording is the storage of data on a magnetised
medium
Magnetic storage uses different patterns of magnetisation in a magnetisable
material to store data and is a form of non-volatile memory.
Types:
1. Hard Disk
2. Floppy Disk
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5. Types Of Storages
Optical Disk
Optical media - such as the compact disk (CD) - are storage media that hold
content in digital form and that are written and read by a laser; these media
include all the various CD and DVD variations, as well as optical jukeboxes and
auto changers.
Types:
1. CD R
2. CD Rw
3. VCD
4. DVD
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6. Disk Spanning
Disc spanning is a feature of CD and DVD burning software that
automatically spreads a large amount of data across many data discs if
the data set's size exceeds the storage capacity of an individual blank
disc.
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7. Retrieval, Playback Or Access Techniques
1) Sequential access Technique
2) Direct Access Technique
3) Index Sequential Technique
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8. Sequential access Technique
In computer science, sequential access means that a group of elements (such as
data in a memory array or a disk file or on magnetic tape data storage) is
accessed in a predetermined, ordered sequence. Sequential access is
sometimes the only way of accessing the data, for example if it is on a tape.
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9. Direct Access Technique
In computer storage, direct access is the ability to obtain data from
a storage device by going directly to where it is physically located on the device
rather than by having to sequentially look for the data at one physical location
after another.
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11. Index Sequential Access Technique
ISAM (Indexed Sequential Access Method) is a file management system
developed at IBM that allows records to be accessed either sequentially (in the
order they were entered) or randomly (with an index). Each index defines a
different ordering of the records.
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