Patent ID: 8620466
Filing Date: 2013-12-31
Classification: G10L,G11B,H04N

Abstract:
1. A method of operating a server and a client, wherein a point in time within an audio signal is determined, said audio signal having been transmitted from a broadcast station to said client and to said server, the method comprising: deriving, at the server, first signature data from said audio signal, wherein said first signature data are descriptive of at least one part of said audio signal, and wherein a reference point in time is associated with the beginning or end of said at least one part of said audio signal; deriving, at the client, second signature data from said audio signal, wherein said second signature data are descriptive of at least one part of said audio signal and are derived in the same manner as said first signature data at the server; comparing said first and second signature data; determining said point in time to be equal to said reference point in time depending on a result of said comparing, wherein said second signature data comprise a plurality of sub-units, wherein each sub-unit is derived from a part of said audio signal, and wherein, in said comparing, a similarity measure is determined for each sub-unit, said similarity measure being descriptive of a degree of similarity of a sub-unit and said first signature data.