Translation guide
A method of reducing file size by discarding some data, commonly used for images, audio, and video. In Japanese, the term is usually expressed as a direct loanword or a descriptive phrase.
The standard technical term used in computing and digital media.
The formal Japanese term for lossy compression, literally 'irreversible compression'. Used in technical documentation and academic contexts.
JPEG is a typical format of lossy compression.
Loanword from English 'lossy compression'. Common in IT and multimedia contexts, especially in spoken language or less formal writing.
This video is compressed using lossy compression.
A variant of 非可逆圧縮, less common but still understood. '不可逆' also means irreversible.
With lossy compression, you cannot completely restore the original data.
Explaining that compression involves data loss, often in contrast to lossless compression.
Literally 'to thin out data'. A natural way to describe the discarding of information in lossy compression.
MP3 reduces file size by thinning out audio data.
Means 'information is lost'. Used to describe the irreversible nature of lossy compression.
Means 'cannot be restored to original'. Emphasizes the irreversible aspect.
Referring to lossy compression when talking about common file formats.
When explaining that a format uses lossy compression, simply state the format and add は非可逆圧縮です.
JPEG is lossy compression, but PNG is lossless compression.
Means 'high compression ratio'. Often used to describe the efficiency of lossy formats.
Lossy compression (非可逆圧縮) discards data to reduce file size, while lossless compression (可逆圧縮) preserves all original data. In Japanese, the contrast is often made with 非可逆 vs. 可逆.
Lossless compression retains data completely, but lossy compression discards some of it.
In casual conversation or IT settings, 'ロッシー' (lossy) and 'ロスレス' (lossless) are widely understood. You can say 'ロッシー圧縮' or simply 'ロッシー'.
In lossy compression, information is lost during the compression process.
An image compressed with lossy compression cannot be restored to its original state.
MP3 has a high compression ratio, so it is used in many music players.