lossy data compression
computer science
Quick Summary
Lossy data compression is a method used in computer science to reduce the size of digital information by removing data that is considered unnecessary or redundant. This process is irreversible, meaning some detail or accuracy is lost and cannot be recovered.12
Key aspects of lossy data compression include:
- Purpose: To decrease the amount of data needed for storage or transmission, making it more efficient to handle large files like images, audio, and video.1
- Mechanism: It works by identifying and discarding information that is least likely to be noticed by humans, such as subtle color variations in images or high-frequency sounds.1
- Trade-offs: While it achieves smaller file sizes than lossless compression, it results in a loss of data quality. This makes it suitable for media where perfect fidelity isn't critical, but not for text or executable programs where every bit of data is essential.12
- Examples: Common formats that utilize lossy compression include JPEG for images and MP3 for audio.1
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