可逆 かぎゃく圧縮 あっしゅくじゃなかったです
kagyakuasshukujanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of 可逆圧縮

1. Wasn't reversible compression.; Wasn't losslessly compressed.

Past/Perfective
Negative
Polite
Casual Register
Computing