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Digital Video and HD, 2nd Edition by Charles Poynton

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18

Metadata

This chapter differs in tone from other chapters in this book. I’m a skeptic concerning metadata.

You know you’re in trouble when the Wikipedia page for Metadata starts “The term metadata is an ambiguous term …” [accessed 2011-10-18].

Metadata presents problems – therefore opportunities, therefore commercial activities, therefore products. However, in my view the video industry hasn’t achieved a sufficiently broad understanding of the deep principles of metadata that any general approach can be set out.

Consider an audio file, storing 200 million audio sample pairs at 44.1 kHz representing a performance of Beethoven’s Symphony No. 9, Choral. To recreate that sound approximating the way it was experienced by the original audience, ...

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