25. Method according to claim 21 , further comprising: providing a correlation basis comprising each frequency being included in a set of code bases representing a plurality of coding symbols, said coding symbols being employed for coding said meta-information; and applying said correlation basis onto said user provided audio information having embedded said meta-information to extract said meta-information; wherein said extracted meta-information being available for retrieval.
25. Method according to claim 21 , further comprising: providing a correlation basis comprising each frequency being included in a set of code bases representing a plurality of coding symbols, said coding symbols being employed for coding said meta-information; and applying said correlation basis onto said user provided audio information having embedded said meta-information to extract said meta-information; wherein said extracted meta-information being available for retrieval. 26. Method according to claim 25 , wherein said applying comprises: obtaining a modulation signal from said correlation basis; obtaining a correlation signal from said user provided audio information by convoluting said modulation signal and said user provided audio information having embedded said meta-information in a frequency domain; extracting magnitude signal values from said correlation signal, said magnitude signal values corresponding to each code basis of said set of code bases; and evaluating said magnitude signal values to retrieve said meta-information from said user provided audio information.