Patent ID: 7363278

Claim:
A method of identifying transmissions of digital works comprising: maintaining a database that stores an identification and identification information for each of a plurality of registered digital works; monitoring a network for transmission of at least one packet-based digital signal including data of an unidentified digital work; extracting at least one feature of data from said unidentified digital work from the at least one packet-based digital signal; comparing said at least one extracted feature to said identification information for at least one of said plurality of registered digital works in said database; determining whether said at least one extracted feature matches said identification information for one of said plurality of digital works responsive to said comparing; determining said packet-based digital signal includes data of a registered work responsive to a determination that said at least one extracted feature matches said identification information for one of said plurality of registered digital works; and performing an action based upon a determination of whether said digital signal includes a registered work.