compressed bitmap image, keeps file size low by reducing pixel patterns, originally designed for photographs now used wiely on web pages, uses lossy compresion, low file size = low quality
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GIF - graphics iterchange format
compressed bitmap image, can contain transparent pixels, lossless compression, file sizes are low restricting the colour depth
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PNG - portable network graphics
compressed bitmap image, initially designed for olie image sharig, employ lossless compressio support transparency but not animation
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TIFF - tagged image file format
dveloped to be usable in both microsoft and apple operating systems, used s standard file file type in commercial printing and OCR software, structure is highly complex compared to others and can use both lossy and lossless compression
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PICT
apple designed it as natie graphic file type, an object orientated file type that can store bitmap and vector graphics it can use true colour
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pixel
smallest unit of a digital image that can be displayed, every pixel has its colour code stored
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image resolution
tells us the quality of an image the higher the amount of pixels the higher the quality
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sample rate
the quantity of samples taken per second to represent the sounds digitally it is measured in hertz
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bit depth
the number of bits that is allocated per sample taken higher bit depth the higher the quality
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bit rate
number of bits required to store 1 second of sound
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ADC
analogue to digital converter, will sample sound at regular time intervals, is the numer of sound samples per second is low the quality of audio will be low and it doesnt show what it is doing between ech sample
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MPEG - moving picture experts group
widely used, delta compression, significantly reduces the amount of data transmitted overall
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MP4 - MPEG-4
designed for digital streaming over the internetr plays audio with video, lossy compression used to reduce large file sizes
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AVI - audio video interleave
supports multiple ideo streams playing back from 1 file, sustains original quality and eliminates need for codecs
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Other cards in this set
Card 2
Front
GIF - graphics iterchange format
Back
compressed bitmap image, can contain transparent pixels, lossless compression, file sizes are low restricting the colour depth
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