Data Portability Flashcards

1
Q

Lossless compression is?

A

Enables the original file to be fully restored to its original state

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2
Q

Lossy is?

A

Original file cannot be reinstated

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3
Q

Why is compression needed

A

Volume - of storage required on storage devices, enables larger amounts of data to fit into the same storage space.

Bandwidth- most local or global networks would not cope with the volumes of data being sent, disrupting communication services

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4
Q

JPEG

A

Joint Photographic Experts Group
Reducing repetition of pixel patterns

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5
Q

GIF

A

Graphics Interchange Format
Loseless

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6
Q

PNG

A

Portable Networks Graphics
Lossless

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7
Q

TIFF

A

Tagged Image File Format - lossy and lossless

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8
Q

PICT

A

Apple developed graphic file superseded by pdf - pure institute of computer technology

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9
Q

TxT

A

Plain text can be stored

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10
Q

CSV

A

Comma separated values - data values

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11
Q

RTF

A

Rich Text Format - translate some of a word processors own markup into standardised rtf markup.

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12
Q

PDF

A

Portable Document Format - holds text,formatting images and portable editable regions which reader can fill in.

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13
Q

WAV

A

Windows waveform - loseless

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14
Q

Mp3

A

MPEG audio layer 3 - discards sounds human ear cannot generally hear

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15
Q

WMA

A

Windows Media Audio - made by Microsoft to complete with mp3

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16
Q

MIDI

A

Musical Instrument Digital Interface - via serial interface connected to an electronic instrument or other sound system.

17
Q

MPEG

A

Moving/Motion picture experts group - a widely-used video file format - delta compression, involves transmitting only info about pixels that change between selected frames

18
Q

MP4

A

MPEG 4- Stores and plays digital audio with video

19
Q

AVI

A

Audio video interleaved - no compression applied - supports multiple audio and multiple video streams playing back from 1 file.

20
Q

Data portability is ?

A

Portable data is data that can be directly transferred between hardware devices or programs without having to be entered again.
Data needs to be stored using different formats to ensure data is portable.