JPEG XS

File Format
Name	JPEG XS
Ontology	Electronic File Formats Graphics JPEG XS
Wikidata ID	Q60776453
Released	2019

JPEG XS is a compressed image and video format, and related standards. It is published as ISO/IEC 21122. As of 2019-08, all the critical parts of the standard had been published.

Format details

From the standard's table of contents, we surmise that there is a still image file format called JXS, and an ISOBMFF-based format called Motion JPEG XS. There is also a standard way to use JPEG XS in HEIF.

Identification

• Can be wrapped in an ISOBMFF-based file format (implementation, see format overview), similar to JPEG XL:
  • the first 4 bytes would be the size of the box (00 00 00 0C, meaning 12 bytes long),
  • the box ID would be 4A 58 53 20 (in ASCII JXS ) and
  • the box content would be the overall signature 0D 0A 87 0A.

Specifications

• ISO/IEC 21122 - JPEG XS low-latency lightweight image coding system. (These documents are probably not free to download.)
  • ISO/IEC 21122-1:2019 - Part 1: Core coding system
  • ISO/IEC 21122-2:2019 - Part 2: Profiles and buffer models
  • ISO/IEC 21122-3:2019 - Part 3: Transport and container formats
  • ISO/IEC 21122-4 - Part 4: Conformance testing
  • ISO/IEC 21122-5 - Part 5: Reference software

Links

• jpeg.org: Overview of JPEG XS
• Wikipedia: JPEG XS