Technical public offering of the new standard "JPEG XL" that improves the compression ratio by 60% with the current image quality intact started

In the movement towards the formulation of the new standard "JPEG XL" which is the successor to "JPEG" which is not overstated to say that it is the most used in the world as a compression technology of still image data, Without dropping, a public offering of technology to raise the compression rate by as much as 60% has begun.

JPEG - Next-Generation Image Compression (JPEG XL) Draft Call for Proposals
https://jpeg.org/items/20170813_cfp_jpeg_xl.html

Jpegxl-draft_cfp.pdf
https://jpeg.org/downloads/jpegxl/jpegxl-draft_cfp.pdf

Committee that formulated the widely used JPEG standard "Joint Photographic Experts Group(Abbr .: JPEG) announced on August 23, 2017 that "JPEG XL" is under development as the next generation image compression. Among them, the policy of public offering of compression technology satisfying the predetermined performance is indicated, and it is aimed at being formulated as ISO (international standard) as early as 2020 as soon as possible.

The published timeline is as follows. In the meeting of the committee to be held in October 2017, the requirement required by the new standard is decided, binary data, algorithms, verification models, etc. are accepted sequentially in 2018, and schedule to formulate standards in 2020 is stipulated I will.


It becomes easy to take pictures with smartphones, a lot of images are uploaded to SNS, downloaded for viewing, and copied society, the image compression technology with higher compression ratio is formulated, It is an important effort to build a more comfortable network environment. Also, various applications, Web sites, and UI have also been changed to rich content that uses many images, and here also the high compressibility will have a positive impact on the user experience.

Although the JPEG format is widely used for such a purpose now, it will be developed the new standard incorporating the evolutionary compression technology. In JPEG XL, policies corresponding to the following image formats are defined.

· Image resolution: 8K size (8192 × 4320) and more from the thumbnail image size
• Sub-sampling: 4: 2: 0, 4: 2: 2, 4: 4: 4
Color space: RGB, YCbCr
· Bit depth: 8 bit and 10 bit, even higher image quality Maximum 16 bit