发明名称 Encoder arrangement for applying inaudible data signal
摘要 The encoder converts an audio signal into a spectral range and determines the masking threshold for the audio signal. The audio signal is converted into the spectral range using Fast Fourier Transformation (100). A pseudonoise signal (106) and a data signal (104) is generated. The data signal and the pseudonoise signal are multiplied to produce a frequency spread data signal. The frequency spread data signal is weighted with the masking threshold and the audio signal and weighted data signal is weighted.
申请公布号 DE19640825(A1) 申请公布日期 1997.09.11
申请号 DE19961040825 申请日期 1996.10.02
申请人 FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., 80636 MUENCHEN, DE 发明人 HEUBERGER, ALBERT, DIPL.-ING., 91056 ERLANGEN, DE;GERHAEUSER, HEINZ, DR.-ING., 91344 WAISCHENFELD, DE;PERTHOLD, RAINER, DIPL.-ING., 91052 ERLANGEN, DE;EBERLEIN, ERNST, DR.-ING., 91091 GROSENSEEBACH, DE;PLANKENBUEHLER, ROLAND, DR.-ING., 90475 NUERNBERG, DE;SCHOTT, HARTMUT, DIPL.-ING., 91054 ERLANGEN, DE;NEUBAUER, CHRISTIAN, DIPL.-ING., 90411 NUERNBERG, DE
分类号 H04H20/31;(IPC1-7):H04L9/00;H04J9/00;H04H9/00;H04Q9/00 主分类号 H04H20/31
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