Patent ID: 7765598

Claim:
A method of online detecting detection of illegal MP3 music transmissions, comprising the following steps: providing at least one first processor for intercepting packets transmitted over network segments, and identifying multiple MP3 packets according to the header format formulated by an MPEG organization; providing at least one second processor for extracting out at least one feature value from each of said MP3 packets, said extraction including normalizing and aggregating values output by polyphase filter banks during an MP3 decoding process to obtain a feature value that is a 32-dimensional vector; and providing a third processor for comparing said feature value with a plurality of MP3 feature values stored in an MP3 database to obtain a similarity therebetween, and if the transmission of MP3 packets is determined to be illegal, then communicating the similarity information, a transmission date, a sender IP address and a receiver IP address to said second processor for recordation in a log.