Separation of stationary and time-varying systems and its application to the restoration of gramophone recordings
作者： P.S. Spencer , P.J.W. Rayner
DOI: 10.1109/ISCAS.1989.100348
关键词:
摘要: The motivation for developing the technique described arose from a desire to restore old gramophone recordings which were spectrally distorted during original recording process. This distortion was caused by horn used focus sound. White noise tests on an suggest that its frequency response contains several strong resonances are modeled as stationary autoregressive subsystem. signal be recovered is time-varying Given knowledge of parameters overall system, it shown how two systems can separated obtain An inverse filter then designed recover signal. Initial results experiments subsystem separation presented using simple identify system. Better methods system identification stage discussed. >
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