The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future · HackerPapers discussions

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — mentioned by cubefox

Wed, 07 Oct 2026 12:28:47 GMT

Yeah. Here is a surprisingly readable article on all the supported features and design decisions of JPEG XL: https://arxiv.org/abs/2506.05987 The format is designed to be as general as possible, potentially replacing many common (JPEG, GIF, PNG) and professional image formats. For example, JPEG XL supports pages (e.g. for comic books), layers (with variable frame sizes, positions and blend modes) and timed animations.

Paper and discussion history. A mention is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — mentioned by janwas

Mon, 14 Sep 2026 09:00:54 GMT

Something is fishy here. The JPEG XL report [1] measured between 240-270 Megapixels/s on 6 cores using the C++ implementation (disclosure: I was responsible for its SIMD/threading), about twice as fast as the then-current libaom. Measuring on a single core is deeply misleading because our code was designed to scale well. I believe AVIF requires tiling in order to parallelize, which causes artifacts at tile boundaries. [1]: https://arxiv.org/pdf/2506.05987

Paper and discussion history. A mention is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — mentioned by cubefox

Wed, 26 Aug 2026 11:04:23 GMT

JPEG XL is also "extra large" in the sense that it covers many features of more specialized image formats. They tried to come up with a pretty universal solution. > It supports wide colour gamut as well as high dynamic range and high bit depth images. JPEG XL further includes features such as animation, alpha channels, layers, thumbnails, lossless and progressive coding (...) https://jpeg.org/jpegxl/ More features are described in this nice overview article: https://arxiv.org/pdf/2506.05987

Paper and discussion history. A mention is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — mentioned by fleabitdev

Wed, 18 Mar 2026 14:20:24 GMT

Both formats are DCT-based (except for lossless JPEG XL). JPEG 2000's use of the DWT was unusual; in general, still-image lossy compression research has spent the last 35 years iteratively improving on JPEG's design. This is partly for compatibility reasons, but it's also because the original design was very good. Since JPEG, improvements have included better lossless compression (entropy coding) of the DCT coefficients; deblocking filters, which blur the image across block boundaries; predicting the contents of DCT blocks from their neighbours, especially prediction of sharp edges; variable…

Paper and discussion history. A mention is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — HN submission

Sun, 13 Jul 2025 05:05:54 GMT

The JPEG XL Image Coding History, Features, Coding Tools, Design Rationale

94 points; 44 discussion replies on HN. Paper and source history. A submission is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — HN submission

Tue, 01 Jul 2025 16:06:59 GMT

JPEG XL Coding System: History, Features, Tools, Design Rationale and Future

3 points; 1 discussion reply on HN. Paper and source history. A submission is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — HN submission

Wed, 25 Jun 2025 13:56:54 GMT

The JPEG XL Image Coding System

2 points; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.

The JPEG XL Image Coding System: History, Features, Coding Tools, Design Rationale, and Future — HN submission

Tue, 10 Jun 2025 16:25:47 GMT

The JPEG XL Image Coding System

3 points; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.