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Work item:
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T.800 (V4)
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Subject/title:
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Information technology - JPEG 2000 image coding system: Core coding system
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Status:
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Consented on 2024-04-26
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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Rev.
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Equivalent number:
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ISO/IEC 15444-1 Ed.5 (Common)
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Timing:
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2024-04 (Medium priority)
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Liaison:
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-
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Supporting members:
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-
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Summary:
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This Recommendation | International Standard defines a set of lossless (bit-preserving) and lossy compression methods for coding bi-level, continuous-tone grey-scale, palletized colour, or continuous-tone colour digital still images.
This Recommendation | International Standard:
– specifies decoding processes for converting compressed image data to reconstructed image data;
– specifies a codestream syntax containing information for interpreting the compressed image data;
– specifies a file format;
– provides guidance on encoding processes for converting source image data to compressed image data;
– provides guidance on how to implement these processes in practice.
This edition includes the following changes relative to the previous edition:
– addition of Annex N, which lists a registration request for media type image/j2c
– specify that the Mastering Display Metadata Box of Annex M is optional and has no defaults, reflecting industry practice
– remove obsolete and erroneous reference to IETF RFC 2279
– clarify semantics of CEpoci
– update reference to ISO/CIE 11664-1, Rec. ITU-R BT.601 and Rec. ITU-R BT.709
– remove unused JPEG Utilities Registration Authority (JURA) term
– specify the value of Rsiz when extended capabilities are present but no profile is signalled
NOTE – As this specification was first published as common text only after ISO/IEC JTC1 had approved the first edition in 2000, edition numbers in the ITU and ISO/IEC versions are offset by one. This is the fourth edition of ITU‑T T.800 and the fifth edition of ISO/IEC 15444-1.
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Comment:
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This is the fourth edition of ITU‑T T.800 and the fifth edition of ISO/IEC 15444-1 due to an offset in the original publication.
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2023-12-14 17:36:21
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Last update:
2024-05-08 14:12:55
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