可逆 かぎゃく圧縮 あっしゅくではありませんでした
hikagyakuasshukudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 非可逆圧縮

1. Was not non-lossless compression.; Was not irreversible compression.

Past/Perfective
Negative
Polite
Formal Register
Computing