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m32341 Editors' Input on Carriage of Timed Metadata in the ISO Base Media File Format



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m32341 Editors' Input on Carriage of Timed Metadata in the ISO Base Media File Format


Thank you. (We note that actually this was not co-authored by, or even reviewed by, most of the persons named here.) The agreed title was “WD of Timed Metadata Metrics of Media in the ISO BMFF (Alex, Ozgur, 1 week)”, and it’s not ‘all’. There are some good fixes here, and also some problems and mistakes (e.g. the formula for MOS). We are not sure about the accuracy field, as the individual measures have such different ranges. Also, the value in the sample cannot be optional, and it means every measure is now 3 bytes larger.

Editors when doing the integration should pick up the fixes and improvements here, under the new title, but fix the MOS and PEVQ equations, and not (yet) adopt the accuracy.

We note that MOS etc. are not really ‘metrics’ but subjective ‘scores’. Maybe ‘measurement’?



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