noun
lossless compression
Computing term for data compression that allows perfect reconstruction of the original data.
PNGはロスレス圧縮を使っているので、画質が劣化しない。
PNG uses lossless compression, so the image quality does not degrade.
ロッシー圧縮 (lossy compression) discards some data to reduce file size, while ロスレス圧縮 preserves all original data.
Compound of English loanword ロスレス (lossless) and 圧縮 (compression).