> In the article I linked, the creator of ANS asserts that Microsoft's patent covers the variant used in JXL. This doesn't necessarily mean JPEG XL is patent-e

> In the article I linked, the creator of ANS asserts that Microsoft's patent covers the variant used in JXL. This doesn't necessarily mean JPEG XL is patent-encumbered (the patent is still annoying, but not necessarily this way). It is recommended for ISO standards that relevant patents should be disclosed and available on a non-discriminatory basis [1], and while patent holders can ignore this recommendation they generally have no reason to do so. In the case of JPEG XL only Google [2] and Cloudinary [3] filed patent declarations, so Microsoft is reasonably thought to have no patents relevant to JPEG XL. [1] https://www.iso.org/iso-standards-and-patents.html https://www.iso.org/iso-standards-and-patents.html [2] https://isotc.iso.org/livelink/livelink/fetch/2000/2122/3770791/16231513/2020%2D07%2D14_Google_LLC_18181%2D1.pdf?nodeid=21757400&vernum=-2 https://isotc.iso.org/livelink/livelink/fetch/2000/2122/3770... [3] https://isotc.iso.org/livelink/livelink/fetch/2000/2122/3770791/16231513/2020%2D07%2D05_Cloudinary_Ltd_18181%2D1.pdf?nodeid=21638255&vernum=-2 https://isotc.iso.org/livelink/livelink/fetch/2000/2122/3770...