JPEG XS

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File Format
Name JPEG XS
Ontology
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.

Contents

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.

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