Jsummers: /* Discussion */

2023-12-01T18:35:32Z

‎Discussion

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Metadata |released=≤2019 }} '''JUMBF''' (JPEG Universal Metadata Box Format) is a standard way to put metadata and other extensio..."

2023-12-01T18:25:55Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Metadata |released=≤2019 }} '''JUMBF''' (JPEG Universal Metadata Box Format) is a standard way to put metadata and other extensio..."

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{{FormatInfo
|formattype=electronic
|subcat=Metadata
|released=≤2019
}}
'''JUMBF''' (JPEG Universal Metadata Box Format) is a standard way to put metadata and other extension data into "box-based" JPEG file formats. It is standardized as ISO/IEC 19566 (JPEG Systems) Part 5.

Standards that make use of JUMBF include [[JPEG 360]] and [[C2PA]].

== Discussion ==
''[Ed. note: This section contains educated guesswork, and needs further review.]''

The main format defined by JUMBF is based on [[boxes/atoms format]]. It involves a box with identifier "<code>jumb</code>", and other boxes that may be contained in it.

"Box-based" formats would include most of the [[JPEG 2000]] formats. Probably more importantly, JUMBF can be used in formats based on original [[JPEG]], via the "Box file format" extension mechanism introduced with [[JPEG XT]]. That is, a sequence of "APP11" segments that begin with ASCII "<code>JP</code>". This mechanism is defined by ISO/IEC 18477 Part 3 (JPEG XT: Box file format). Note that [[JPEG XT]] itself apparently does not use JUMBF -- JPEG XT and JUMBF are different things that are both based on ISO/IEC 18477 Part 3.

== Identification ==
In original JPEG format, JUMBF involves JPEG "APP11" segments whose data has ASCII "{{magic|JP}}" at offset 0, and "{{magic|jumb}}" at offset 12.

== Specifications ==
* [https://www.iso.org/standard/84635.html ISO/IEC 19566-5:2023] - JPEG Systems Part 5 (not free to download)

Related:
* [https://www.iso.org/standard/66071.html ISO/IEC 18477-3:2015] - JPEG XT Part 3: Box file format (not free to download)

== Sample files ==
* https://github.com/c2pa-org/public-testfiles/tree/main/image/jpeg

== Links ==
* [https://jpeg.org/jpegsystems/index.html JPEG Systems overview]

[[Category:Box file format]]
[[Category:Metaformats]]
[[Category:JPEG]]
[[Category:JPEG 2000]]
[[Category:JPEG (organization)]]
[[Category:Graphics]]

@@ Line 13: / Line 13: @@
 The main format defined by JUMBF is based on [[boxes/atoms format]]. It involves a box with identifier "<code>jumb</code>", and other boxes that may be contained in it.
-"Box-based" formats would include most of the [[JPEG 2000]] formats. Probably more importantly, JUMBF can be used in formats based on original [[JPEG]], via the "Box file format" extension mechanism introduced with [[JPEG XT]]. That is, a sequence of "APP11" segments that begin with ASCII "<code>JP</code>". This mechanism is defined by ISO/IEC 18477 Part 3 (JPEG XT: Box file format). Note that [[JPEG XT]] itself apparently does not use JUMBF -- JPEG XT and JUMBF are different things that are both based on ISO/IEC 18477 Part 3.
+"Box-based" formats would include most of the [[JPEG 2000]] formats. Probably more importantly, JUMBF can be used in formats based on original [[JPEG]], via the "Box file format" extension mechanism introduced with [[JPEG XT]]. That is, a sequence of "APP11" segments that begin with ASCII "<code>JP</code>". This mechanism is defined by ISO/IEC 18477 Part 3 (JPEG XT: Box file format). Note that [[JPEG XT]] itself apparently does not use JUMBF -- JPEG XT and JUMBF are different things that both utilize ISO/IEC 18477 Part 3.
 == Identification ==

JUMBF - Revision history

Jsummers: /* Discussion */

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Metadata |released=≤2019 }} '''JUMBF''' (JPEG Universal Metadata Box Format) is a standard way to put metadata and other extensio..."