Realtime music identification became more and more interesting within the past few years. Possible fields are for example monitoring a radio station in order to create a playlist or scanning network traffic is search of copyright protected material. This paper presents a client-server application which is able to do this in real-time with the help of MPEG-7. It explains how to define the similarity between two segments of music and determents its robustness towards perceptional audio coding and filtering. It also introduces an indexing system to reduce the number of segments which have to be compared to the query.
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