| Information technology – JPEG XR image coding system – Conformance testing |
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Recommendation ITU-T T.834 has been developed jointly with ISO/IEC JTC 1 SC 29/WG 1 in a collaborative team that is referred to as the Joint Photographic Experts Group (JPEG). It will be published as a technically-aligned twin text by both organizations (ITU-T and ISO/IEC).
This Recommendation | International Standard specifies tests designed to verify whether codestreams, files, encoders and decoders meet the normative requirements specified in Rec. ITU-T T.832 | ISO/IEC 29199-2 (Information technology – JPEG XR image coding system – Image coding specification).
– A codestream (or file) can be claimed to conform to Rec. ITU-T T.832 | ISO/IEC 29199-2 if it meets the normative requirements for such codestreams (or file) specified in Rec. ITU T T.832 | ISO/IEC 29199-2.
– An encoder can be claimed to have codestream (or file format) conformance to Rec. ITU T T.832 | ISO/IEC 29199-2 if the codestreams (or files) that it generates are conforming codestreams (or files).
– A decoder can be claimed to conform to a specified subset of Rec. ITU-T T.832 | ISO/IEC 29199-2 capabilities (such as a combination of "profile" and "level" capabilities) if it can properly decode all codestreams (or files) obeying the constraints specified in Rec. ITU T T.832 | ISO/IEC 29199-2 for the specified subset of capabilities.
The tests specified in this Recommendation | International Standard provide methods for (non-exhaustive) testing of whether encoders and decoders meet these requirements.
This enhancement of Rec. ITU.T T.834 | ISO/IEC 29199-4 extends and enhances the set of test streams for Rec. ITU T T.832 | ISO/IEC 29199-2 in two ways: First, additional test streams cover features than had either not yet been tested in earlier revisions or did not exist in earlier versions in the standard. Second, extensions made to the JPEG 2000 file format of Rec. ITU-T T.802 | ISO/IEC 15444-2 allow the wrapping of JPEG XR codestreams in the JPEG 2000 file format, for which new reference streams are included.
A set of data for use in such tests is provided as an electronic attachment to this Recommendation | International Standard and is an integral part thereof. This data set is also available for download from the ITU-T Test Signal Database at: http://itu.int/net/ITU-T/sigdb/speimage/Tseries-s.htm#T.834. |
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| Citation: |
https://handle.itu.int/11.1002/1000/12305 |
| Series title: |
T series: Terminals for telematic services
T.830-T.849: Still-image compression | JPEG XR |
| Approval date: |
2014-10-14 |
| Identical standard: | ISO/IEC 29199-4 (Twinned) |
| Provisional name: | T.JXR-4 |
| Approval process: | AAP |
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Status: |
In force |
| Observation: | This Recommendation contains the conformance test suite. Due to the data volume, this is downloadable free of charge from ITU-T test signals database at: http://handle.itu.int/11.1002/2000/10648. |
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Maintenance responsibility: |
ITU-T Study Group 16 |
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Further details: |
Patent statement(s)
Development history
Associated test signals
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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T Suppl. 1 (11/2004)
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Conformance testing requirements for Recommendations of the T.170-series
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In force
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here
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here
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here
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T Suppl. 2 (03/2011)
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ITU-T T.83x-series – Supplement on information technology – JPEG XR image coding system – System architecture
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In force
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here
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here
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here
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