Compression Flashcards

OCR GCSE J277 Computer Science specification

Compression

The process of reducing the size of a file to save storage space and make transferring files faster.

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Terms in this set (9)

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Compression

The process of reducing the size of a file to save storage space and make transferring files faster.

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Lossy compression

Removes data permanently to reduce file size. Results in lower quality but smaller files.

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Lossless compression

Reduces file size without losing any data. Original file can be restored completely.

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Effects of compression on file size

Compression reduces file size, making it easier to store and transfer files.

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Effects of compression on transferring files

Smaller file sizes mean faster transfer speeds and reduced bandwidth usage.

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Effects of compression on storing files

Compressed files take up less storage space, allowing more files to be stored on a device.

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Advantages of lossy compression

Significantly reduces file size, making it ideal for streaming and sharing media files.

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Disadvantages of lossy compression

Data is permanently removed, which can result in noticeable quality loss in images, audio, or video.

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Examples of lossless compression

ZIP files and PNG images use lossless compression to retain all original data.

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