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Year 10 Computer Science - Compression

Across
A way to describe how tightly packed the pixels in an image are.
A method of reducing file sizes, particularly in digital media such as photos, audio and video.
This is estimated by an image's height in pixels, the image's width in pixels and the colour depth per pixel.
The number of bits used to record each sample of audio.
Graphics Interchange Format - an 8-bit digital image format which uses lossless compression. Also used for short animations.
A type of data that a microphone captures and then converts it into a digital signal.
Files contain extra data called this.
This is a measure of how much data is processed for each second of sound.
No data is lost from this type of compression.
A digitally recorded fragment of sound, taken from an existing track or sound environment.
The number system most commonly used by people. It contains 10 unique digits 0 to 9. Also known as decimal or base 10.
The number of pixels that an image contains is called this e.g., 256 x 256, 640 x 480, 1024 x 764.
Down
Moving Picture Experts Group – Layer 4 - a standard video file format using lossy compression.
This is the range of colours available in an image.
A unit of data containing 8 bits.
A number system using 16 symbols from 0-9 and A-F, also known as base 16 and hex.
A number system that contains two symbols, 0 and 1. Also known as base 2.
This is the number of samples recorded in any given period of time.
Another way to describe pictures.
This is where some data is discarded and discarded in compression.
Picture element - a single dot of colour in a digital bitmap image or on a computer screen.