System for controlling projections in theater, has sound recording equipment for capturing signals in projection room, where signals are not audible to human ear, while signals provided in soundtrack contain advertising, trailer or movie

摘要

The control system has sound recording equipment for capturing the signals in a projection room (1), where the signals are not audible to the human ear. The signals are provided in a soundtrack that contains advertising, trailer or movie, whose projection is to be controlled. A filter (3) is provided for cleaning the signals received by a microphone (2) for processing. A microprocessor (4) with a memory is provided for storing the records detected in the acoustic signals. The messages with the information of received signals are sent by a modem (5).