What are the two main types of data compression?

What are the two main types of data compression?

• A. Lossless compression and Lossy compression
• B. Lossless compression and Reversible compression
• C. Lossy compression and Irreversible compression
• D. Reversible compression and Non-reversible compression

Answer: (A)

Data compression is categorized by whether the original data can be perfectly recovered. The two main types are lossless and lossy. Lossless compression reduces file size without dropping any information, so you can decompress exactly the same data you started with. This is essential for text, software, and other data where any change would cause problems. Lossy compression achieves higher size reductions by discarding some data, so the exact original can’t be fully recovered; this is often acceptable for images, audio, and video where some loss isn’t noticeable. The pair lossless and lossy matches these standard categories, while terms like reversible or irreversible aren’t the common way to describe compression, making lossless and lossy the best description.

Data compression is categorized by whether the original data can be perfectly recovered. The two main types are lossless and lossy. Lossless compression reduces file size without dropping any information, so you can decompress exactly the same data you started with. This is essential for text, software, and other data where any change would cause problems. Lossy compression achieves higher size reductions by discarding some data, so the exact original can’t be fully recovered; this is often acceptable for images, audio, and video where some loss isn’t noticeable. The pair lossless and lossy matches these standard categories, while terms like reversible or irreversible aren’t the common way to describe compression, making lossless and lossy the best description.