Our great sponsors
-
-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
-
> If you want to play around with lossless compression, try out my "BYOM" (Bring Your Own Model) library for arithmetic encoding: https://github.com/comperical/MirrorEncode
I believe this concept is widely known for high-end compressors.
Unfortunately it still doesn't expose Brotli [1], which should be already in web browsers due to `Content-Encoding: br`. There is a very roundabout way to decompress a Brotli stream though, and that's how I've got a typing game into 1 KB of JavaScript [2] back in 2022.
[1] https://github.com/WICG/compression/issues/34
[2] https://js1024.fun/demos/2022/18/readme
For JPEG XL, refer to its format overview [1]. In short its lossless mode uses a combination of multiple techniques: the rANS coding with an alias table, LZ77, reversible color transforms, a general vector quantization that subsumes palettes, a modified Haar transform and a learnable meta-adaptive decision tree for context modelling.
One good thing about JPEG XL is that its lossy mode also largely uses the same tool, with a major addition of specialized quantization and context modelling for low- and high-frequenty components.
[1] https://github.com/libjxl/libjxl/blob/main/doc/format_overvi...