What is the difference between lossless and lossy audio compression?

What is the difference between lossless and lossy audio compression?

• A. Lossless reduces file size more than lossy
• B. Lossless preserves all audio data, lossy discards some data to reduce file size
• C. Lossless uses lossy algorithms
• D. Lossless only works on text

Answer: (B)

The main idea is whether the compression keeps every bit of the original data or not. In lossless compression, you shrink the file but can restore the exact original audio when you decompress it—no information is discarded that affects playback. This makes it ideal for archiving, mastering, or any situation where perfect fidelity is important. In lossy compression, some data is intentionally removed during encoding based on what is less perceptible to human ears, so the decompressed audio is an approximation of the original. It reduces file size more aggressively, which is useful for streaming or portable listening where bandwidth or storage is limited. So the key difference is that lossless preserves all audio data, while lossy discards some data to save space.

The main idea is whether the compression keeps every bit of the original data or not. In lossless compression, you shrink the file but can restore the exact original audio when you decompress it—no information is discarded that affects playback. This makes it ideal for archiving, mastering, or any situation where perfect fidelity is important. In lossy compression, some data is intentionally removed during encoding based on what is less perceptible to human ears, so the decompressed audio is an approximation of the original. It reduces file size more aggressively, which is useful for streaming or portable listening where bandwidth or storage is limited. So the key difference is that lossless preserves all audio data, while lossy discards some data to save space.