Multifunctional digital broadcast control box

Abstract

The invention relates to a multifunctional digital broadcast control box. The box comprises a control unit which is used for signal processing and is connected with a two-way Ethernet, a USB interface, a 485 communication interface, a DI / DO interface, an SD card module and a DC12V input; and an audio encoding and decoding chip which is connected with the control unit and is also connected with a microphone input, an audio transformer, an audio hard wire output and a loudspeaker. Therefore, the multifunctional broadcast control box has the advantages that the multifunctional broadcast control box is provided with the emergency broadcast key, fire-fighting emergency broadcast can be triggered by pressing the key, the multifunctional broadcast control box can also be used as fire-fighting broadcast, pre-recording emergency broadcast is circularly carried out on all broadcast areas, at the moment, microphone broadcast can be inserted to carry out artificial microphone broadcast on the whole area, and voice content can be recorded. Moreover, any broadcast area can be selected for monitoring, the monitored content is the content being played in the currently selected broadcast area, themonitoring volume key is adjustable, and the subway operation requirement can be met.

Description

technical field [0001] The invention relates to a broadcast control box, which belongs to the technical field of rail transit, in particular to a multifunctional digital broadcast control box. Background technique [0002] At present, subway broadcasting equipment is an important facility to ensure safety in subway operation. In addition to meeting the basic broadcasting function requirements, it is necessary to take into account the fire broadcasting function. Existing broadcasting equipment cannot meet the functional requirements of multi-broadcasting area parallel broadcasting and multi-operators occupying the broadcasting area according to priority, and uses analog circuits, which have large noise and poor sound effects, and the performance parameters of discrete devices are greatly affected by the ambient temperature, resulting in equipment performance will also be reduced. [0003] In addition, the existing broadcast control box cannot take into account the fire broad...

AI Technical Summary

Problems solved by technology

Existing broadcasting equipment cannot meet the functional requirements of multi-broadcasting area parallel broadcasting and multi-operators occupying the broadcasting area according to priority, and uses analog circuits, which have large noise and poor sound effects, and the performance parameters of discrete devices are greatly affected by the ambient temperature, resulting in equipment The performance of the work will also be reduced

[0003] In addition, the existing broadcast control box cannot take into account the fire broadcast function at the same time, and cannot provide the function of starting emergency broadcast in disaster prevention mode

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