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Recording process allowing the simultaneous projection of photographic views with a recorded commentary and installation for its implementation.
Recording process allowing the simultaneous projection of photographic views with a recorded commentary and installation for its implementation.
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机译:记录过程允许同时投射带有已记录评论的摄影视图和用于实现的安装。
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摘要
Method and system for a simultaneous projection of photographic images associated with a recorded commentary. Electrical signals coming from the audio spectrum representing the commentary are recorded and a series of control pulses having a given carrier frequency and occuring at predetermined intervals are superimposed on the signals. The pulses are modulated with a signal having a frequency different from the carrier frequency. A switching means is actuated by detected and amplified modulating signals for actuating a photographic image changing device and short-circuiting a filter connecting a reading device to a loudspeaker.
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