Topic 3 Flashcards

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ASCII
ASCII, abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices.
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Resolution
Resolution. Resolution indicates the number of pixels that are displayed per inch for an image (or pixels per centimetre). Most computer monitors display at resolutions of 72 pixels per inch or 96 pixels per inch.
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Unicode
an international encoding standard for use with different languages and scripts, by which each letter, digit, or symbol is assigned a unique numeric value that applies across different platforms and programs.
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Lossy compression
In lossy compression, the data in a file is removed and not restored to its original form after decompression. Specifically, data is permanently removed, which is why this method is also known as irreversible compression. This data loss is not usually not
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Lossless compression
Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistical redund
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Run Length Encoding (RLE)
Run-length encoding (RLE) is a lossless compression method where sequences that display redundant data are stored as a single data value representing the repeated block and how many times it appears in the image.
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Dictionary compression
A dictionary coder, also sometimes known as a substitution coder, is a class of lossless data compression algorithms which operate by searching for matches between the text to be compressed.
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Huffman compression
In computer science and information theory, a Huffman code is a particular type of optimal prefix code that is commonly used for lossless data compression.
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Buffering
When the download speed is slower than the playback speed
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Bitmap
A bit map (often spelled "bitmap") defines a display space and the colour for each pixel or "bit" in the display space. A Graphics Interchange Format and a JPEG are examples of graphic image file types that contain bit maps.
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Bit depth
The Bit Depth of an image refers to how much computer memory is devoted to each pixel in that image. One bit in computer memory represents a single switch that can be in the on or off position.
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Colour depth
Colour depth refers to the maximum number of colours an image can contain. Colour depth is determined by the bit depth of an image (the number of binary bits that define the shade or colour of each pixel in a bitmap).
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PBM Monochrome
Portable Bitmap File Format. NAME pbm - portable bitmap file format DESCRIPTION The portable bitmap format is a lowest common denominator monochrome file format.
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Analogue to digital conversion
Analog-to-digital conversion (ADC) is an electronic process in which a continuously variable, or analogue, signal is changed into a multilevel digital signal without altering its essential content.
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Binary
Binary describes a numbering scheme in which there are only two possible values for each digit -- 0 or 1 -- and is the basis for all binary code used in computing systems. These systems use this code to understand operational instructions and user inputs
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Hexadecimal
Hexadecimal is a numbering system with base 16. It can be used to represent large numbers with fewer digits. In this system there are 16 symbols or possible digit values from 0 to 9, followed by six alphabetic characters -- A, B, C, D, E and F.
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Denary
Denary is a base 10 number system, also known as decimal. It is the number system most commonly used by people. Each number position contains one of the 10 unique digits of 0-9.
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Overflow
In computing, an overflow error is an error that happens when a program receives a number, value or variable outside the scope of its ability to handle. This type of error is somewhat common in programming, especially when dealing with integers or other n
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Other cards in this set

Card 2

Front

Resolution. Resolution indicates the number of pixels that are displayed per inch for an image (or pixels per centimetre). Most computer monitors display at resolutions of 72 pixels per inch or 96 pixels per inch.

Back

Resolution

Card 3

Front

an international encoding standard for use with different languages and scripts, by which each letter, digit, or symbol is assigned a unique numeric value that applies across different platforms and programs.

Back

Preview of the back of card 3

Card 4

Front

In lossy compression, the data in a file is removed and not restored to its original form after decompression. Specifically, data is permanently removed, which is why this method is also known as irreversible compression. This data loss is not usually not

Back

Preview of the back of card 4

Card 5

Front

Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistical redund

Back

Preview of the back of card 5
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