Set-Top-Box Lexicon: More on Content Forensics - Fingerprints and Signatures

by Jane Clarke, May 26, 2011, 4:00 PM

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CIMM is taking a pro-active role in advancing new media nomenclature and processes with both its Lexicon (terms and definitions associated with Set-Top Box data measurement) and recently released Asset Identification Primer (glossary of asset terms). These documents form the basis of the Word-A-Week column which offers a common language for Set-Top Box nomenclature that can expedite the roll-out of the data for its many industry applications. 

Continuing with last week's column on Watermarks (Set-Top-Box Lexicon: Watermarking) we now focus on other forms of content identification - Fingerprinting and Signatures. According to the CIMM Asset Identification Primer, Fingerprinting differs from a watermark in that fingerprinting does not add any new information to the content. It merely uses the asset's current features and characterisitcs to create a prototype identification that can then be compared to other content fingerprints on file in a reference database to see if there is a match.

Here are the terms associated with content identification in its many forms: 

Fingerprinting

See also: Signature

CIMM DEFINITION : The technique in which the software identifies, extracts and then compresses characteristic components of a video, enabling that video to be uniquely identified by its resultant "fingerprint". 

  

Signature

See also: Fingerprinting, Watermark

CIMM DEFINITION : Another term for fingerprinting

 

Identifier

See also: Fingerprinting, Signature, Watermark.

CIMM DEFINITION : A more generic term for in-coding of unique information. A unique expression in a written format either by a code, by numbers or by a combination of both to distinguish variations from one to another among a class of substances, items or objects.

Please refer to the CIMM Lexicon online at http://www.cimm-us.org/lexicon.htm for additional information on these and other terms.

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