Lossless unqualified would mean lossless: recoverable exactly bit-for-bit, like PNG, FLAC, or ZIP. The only reason to describe a system as visually or perceptu

Lossless unqualified would mean lossless: recoverable exactly bit-for-bit, like PNG, FLAC, or ZIP. The only reason to describe a system as visually or perceptually lossless is because the encoding is lossy, even if very good, like an MP3 or JPEG at their highest quality settings.