Set-Top-Box Lexicon: More on Content Forensics - Fingerprints and Signatures
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:
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".
See also: Fingerprinting, Watermark
CIMM DEFINITION : Another term for fingerprinting
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.