Data Transmission Issues

What is Compression?
Compression reduces file size so files can be transferred faster. It is used for images to be displayed on the Web, video and audio in streaming and VOIP, documents attached to emails.
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Types of Compression?
There are two main types of compression which are Lossy and Lossless.
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What is a Lossy Compression?
Data removed during compression is permanently delete. Commonly used in images, audio and video.
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Examples of a Lossy Compression?
JPEG image, MP3 audio and MPEG video
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What is a Lossless Compression?
Lossless is when all original data can be recovered when uncompressed. Commonly used for documents.
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Examples of a Lossless Compression?
BITMAP, also known as GIF
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Advantages of Data Compression?
Allows a faster file transfer, less disk space allowing more data in reality and has faster writing and reading
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Disadvantages of Data Compression?
Effects of error in transmission, has more complication and slower for complex methods
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What is Codec?
Codec is a program used to compress and decompress videos and audio files, this reduces space they take up on disk and allows a faster transfer over a network.
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Advantages of Codec?
It is free and flexible to use, supports different data rates and can be used in high quality.
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Disadvantages of Codec?
It can be increasingly complicated and can be limited to use.
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Other cards in this set

Card 2

Front

There are two main types of compression which are Lossy and Lossless.

Back

Types of Compression?

Card 3

Front

Data removed during compression is permanently delete. Commonly used in images, audio and video.

Back

Preview of the back of card 3

Card 4

Front

JPEG image, MP3 audio and MPEG video

Back

Preview of the back of card 4

Card 5

Front

Lossless is when all original data can be recovered when uncompressed. Commonly used for documents.

Back

Preview of the back of card 5
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