| 摘要 |
PCT No. PCT/DE84/00285 Sec. 371 Date Oct. 18, 1985 Sec. 102(e) Date Oct. 18, 1985 PCT Filed Dec. 31, 1984 PCT Pub. No. WO85/03160 PCT Pub. Date Jul. 18, 1985.For suppressing interference in an audio signal comprising a useful signal component and an interference signal component in the method according to the invention firstly the original audio signal is sampled and digitally recorded. At the same time the level of the interference signal component is separately detected and sampled, the sample values being stored as reference interference signal under the control of a computer retaining the phase relationship with respect to the original audio signal. The recorded digitized signal is then processed under the control of a computer at a predetermined speed and the interference signal component thereof is compensated in dependence upon the stored reference interference signal. An apparatus for carrying out this method comprises an analog reproduction unit (1) for an original master tape (3), an analog/digital converter (4), a digital recording unit (6), an interference signal separating means (7), a memory means (11) for storing the reference interference signal, a digital reproduction unit (24) and a processor (9) in which the compensation of the signal reproduced by the digital reproduction unit (24) is effected in dependence upon the interference signal data present in the memory means (11).
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