| http://www.w3.org/ns/prov#value | - anyMethod and apparatus for encoding/decoding broadcast or recorded segments and monitoring audience exposure theretoUS5581800 *Jun 7, 1995Dec 3, 1996The Arbitron CompanyMethod and apparatus for automatically identifying a program including a sound signalUS5612729 *Jun 7, 1995Mar 18, 1997The Arbitron CompanyMethod and system for producing a signature characterizing an audio broadcast signalUS56214
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