Committee Draft of JPEG XL Image Coding System

Alexander Rhatushnyak, Jan Wassenberg, Jon Sneyers, Jyrki Alakuijala, Lode Vandevenne, Luca Versari, Robert Obryk, Zoltan Szabadka, Evgenii Kliuchnikov, Iulia-Maria Comsa, Krzysztof Potempa, Martin Bruse, Moritz Firsching, Renata Khasanova, Ruud van Asseldonk, Sami Boukortt, Sebastian Gomez, Thomas Fischbacher

Abstract: JPEG XL is a practical approach focused on scalable web distribution and efficient compression of high-quality images. It provides various benefits compared to existing image formats: 60% size reduction at equivalent subjective quality; fast, parallelizable decoding and encoding configurations; features such as progressive, lossless, animation, and reversible transcoding of existing JPEG with 22% size reduction; support for high-quality applications including wide gamut, higher resolution/bit depth/dynamic range, and visually lossless coding. The JPEG XL architecture is traditional block-transform coding with upgrades to each component.