CN107332634B

CN107332634B - Audio matrix host and working method thereof, public broadcasting system and working method thereof

Info

Publication number: CN107332634B
Application number: CN201710694634.5A
Authority: CN
Inventors: 罗志锋; 黄文裕; 邝庭超; 黄健恒
Original assignee: Guangzhou Deken Longjoin Electronics Co ltd
Current assignee: Guangzhou Deken Longjoin Electronics Co ltd
Priority date: 2017-08-15
Filing date: 2017-08-15
Publication date: 2023-02-28
Anticipated expiration: 2037-08-15
Also published as: CN107332634A

Abstract

The invention discloses an audio matrix host, a public broadcasting system and a working method of the audio matrix host and the public broadcasting system, wherein the audio matrix host comprises a CPU, and a digital audio media matrix, a microphone controller, a fire alarm, a fire linkage device, a trigger controller and an external sound source which are respectively connected with the CPU; after receiving the audio signals from the microphone controller, the fire alarm, the external sound source and the trigger controller, the CPU acquires the destination of each path of audio signals, namely the audio frequency zone to which each path of audio signals is distributed; and for each audio zone, comparing the priority of each path of audio signal to be distributed to the same audio zone, and then controlling the digital audio media matrix to output the audio signal with the highest priority distributed to the same audio zone to the corresponding audio zone. The public broadcasting system comprises a plurality of audio matrix hosts, and CPUs of the audio matrix hosts are cascaded. The invention has the advantage of simple structure, does not need to carry out complicated connection, and saves the installation space and the use cost.

Description

Audio matrix host and working method thereof, public broadcasting system and working method thereof

Technical Field

The present invention relates to a broadcasting system, and more particularly, to a public broadcasting system and an audio matrix host.

Background

With the continuous progress of the times and the rapid development of scientific technology, the functional requirements of modern buildings are obviously different from those of the original buildings, particularly the high-speed development of the weak current technology of the buildings introduces the most advanced technologies of series such as electronic technology, communication technology, network technology, computer technology, automatic control technology, sensor technology and the like, so that the service functions of the buildings are greatly improved, the comprehensiveness is stronger, and the related fields are wider. The public broadcasting is used as a component of a weak current system, closely related to the modern life of people, can play music, can be used for service propaganda and paging broadcasting, can also be used as emergency broadcasting of fire accidents, is a broadcasting system with strong consent, is widely used in places such as communities, markets, hotels, office communities, airports, docks, stations and the like, and is an indispensable part in the modern life and work.

The broadcasting products on the market at present mainly fall into two categories, one category is classified as analog broadcasting systems, the other category is digital broadcasting systems namely network IP broadcasting, the traditional analog broadcasting products form a broadcasting system with multiple sound sources playing and complete functions, the needed structural equipment products are too numerous, the requirement on the installation space condition of the system is high, the requirement of a user for using the system invisibly increases the cost, the anti-jamming capability of audio transmission of the system is poor due to the fact that multiple pieces of equipment are required to be connected through machines in the composition application of the system, and more broadcasting audio frequency areas cannot be expanded.

Disclosure of Invention

The first objective of the present invention is to overcome the drawbacks and disadvantages of the prior art, and to provide an audio matrix host, which has the advantages of simple structure and powerful functions, and does not require complex connection when forming a broadcast system with multiple audio sources and complete functions, thereby saving installation space and use cost.

The second objective of the present invention is to provide a working method of the above audio matrix host.

The third purpose of the present invention is to provide a public broadcasting system composed of the above audio matrix host, which can be expanded into more broadcast audio zones and has the advantage of strong anti-interference capability.

A fourth object of the present invention is to provide a method for operating the public address system.

The first purpose of the invention is realized by the following technical scheme: an audio matrix host comprises a CPU, a digital audio media matrix, a microphone controller, a fire alarm, a fire-fighting linkage device and a trigger controller;

the microphone controller is provided with a plurality of microphone audio input ports, is connected with the CPU and sends audio signals input by the microphone controller audio input ports to the CPU;

the fire alarm is connected with a first memory card which stores audio signals of fire alarms; the fire alarm is connected with the CPU, the CPU controls the fire alarm to read the audio signal from the first memory card and transmits the read audio signal to the CPU;

the fire-fighting linkage device is provided with a plurality of fire alarm trigger signal input ports, the fire-fighting linkage device is connected with the CPU and transmits the received fire alarm trigger signals to the CPU, and the CPU controls the fire alarm device to read the audio signals of the fire alarm from the first storage card when receiving the fire alarm trigger signals;

the trigger controller is connected with an external timer sound source triggered by a dry point, the trigger controller is connected with a CPU, and the CPU receives an audio signal sent by the external timer sound source through the trigger controller after receiving a dry point trigger signal of the external timer sound source through the trigger controller;

the CPU is provided with a plurality of external audio input ports, is connected with an external sound source through the external audio input ports, and receives audio signals sent by the external sound source;

the CPU is connected with the digital audio media matrix, and acquires the destination of each path of audio signal after receiving the audio signals from the microphone controller, the fire alarm, the external sound source and the trigger controller, namely the audio zone to which each path of audio signal is distributed; and simultaneously comparing the priority of each audio signal to be distributed to the same audio region for each audio region, and then controlling the digital audio media matrix to output the audio signal with the highest priority distributed to the same audio region to the corresponding audio region.

Preferably, the trigger controller is connected with an external fire alarm sound source, and when receiving a fire alarm trigger signal sent by the fire-fighting linkage device, the CPU obtains an audio signal sent by the external fire alarm sound source through the trigger controller and sends the fire alarm trigger signal to the outside through the trigger controller; the CPU is connected with a cut-through controller, the cut-through controller is connected with equipment which needs to stop running when a fire alarm occurs, when the CPU receives a fire alarm trigger signal sent by a fire-fighting linkage device, the CPU sends a control signal to the cut-through controller, and the cut-through controller controls the equipment which needs to stop running when the fire alarm occurs to stop running;

the CPU is connected with a first touch screen.

Preferably, the microphone controller is connected with each microphone workstation through each microphone audio input port on the microphone controller;

the microphone workstation comprises a microphone, a first controller, a first digital control audio processing chip and a second touch screen, wherein an audio signal output end of the microphone is connected with an input end of the first digital control audio processing chip, and an output end of the first digital control audio processing chip is connected with a microphone audio input port of the microphone controller; the first digital control audio processing chip is connected with a first controller, and the gain and the sound effect of the first digital control audio processing chip are adjusted through the first controller; the first controller is connected with the CPU, and the second touch screen is connected with the first controller.

Preferably, the remote control device further comprises a remote controller, wherein the remote controller is provided with a plurality of remote audio signal input ports and a plurality of remote audio signal output ports; the remote controller is connected with each remote control panel arranged in each audio frequency zone through each remote audio frequency signal input port on the remote controller and is used for receiving the audio frequency signals sent by the remote control panel; the remote controller is connected with the CPU, and transmits the audio signals received by the remote controller from each remote control panel to the CPU through each remote audio signal output port on the remote controller; in the remote controller, every several remote audio signal input ports share one remote audio signal output port, wherein each remote audio signal input port connected with a remote control panel belonging to the same audio zone shares one remote audio signal output port, namely, audio signals sent to the remote controller by the remote control panel in the same audio zone are all output to a CPU through the same remote audio signal output port in the remote controller, the CPU receives the audio signals sent by the remote controller and then sends the audio signals to a digital audio media matrix, and then the digital audio media matrix is controlled according to the priority of the audio signals to output corresponding audio signals to each audio zone;

each remote control panel comprises a second controller, a local audio source, a second digital control audio processing chip and a third touch screen; the second controller is connected with the CPU, and the third touch screen is connected with the second controller;

the second controller is connected with the local audio source and is used for selecting the audio signal output by the local audio source; the input end of the second digital control audio processing chip is connected with a local audio source, and the output end of the second digital control audio processing chip is connected with one remote audio signal input port of the remote controller through a signal line; the second controller is connected with the second digital control audio processing chip and is used for adjusting the gain and the sound effect of the second digital control audio processing chip.

Furthermore, the digital audio media matrix comprises 28 audio signal input ends, wherein the 1 st to 8 th audio signal input ends input 8 audio signals sent to the CPU by the microphone controller, the 9 th to 16 th audio signal input ends input 8 audio signals sent to the CPU by the external sound source, the 17 th audio signal input end inputs an audio signal sent to the CPU by the fire alarm, the 18 th audio signal input end inputs an audio signal sent to the CPU by the trigger controller from the external timer sound source, and the 19 th audio signal input end inputs an audio signal sent to the CPU by the trigger controller from the external fire alarm sound source; the 20 th audio signal input end inputs the audio signal read from the second memory card or the external U disk to the CPU; the 21 st to 28 th audio signal input ends input the audio signals output by the 8 remote audio signal output ends of the remote controller;

the digital audio media matrix comprises a first selector, a second selector and a third selector, wherein the first selector is a 40-path 20-path selector, the second selector is a 28-path 8-path selector, and the third selector is a 36-path 1-path selector;

the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected with the 20 input ends of the first selector through each third digital control audio processing chip; the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector, and the 8 input ends of the second selector correspondingly input 8 paths of audio signals input to the CPU by the remote controller; 8 output ends of the second selector are respectively and correspondingly connected with 8 fourth digital control audio processing chips, and the 8 fourth digital control audio processing chips are respectively and correspondingly connected with 8 loudspeaker front-end power amplifiers of audio zones; 20 input ends of the third selector are correspondingly connected with 20 output ends of the first selector, 8 input ends of the third selector are correspondingly input with 8 paths of audio signals input to the CPU by the remote controller, 8 input ends of the third selector are respectively and correspondingly connected with output ends of 8 fourth digital control audio processing chips, and the output end of the third selector is connected with a local loudspeaker through a digital power amplifier to realize a monitoring function through the local loudspeaker;

the address ends of the first selector, the second selector and the third selector are respectively connected with a CPU, and the CPU controls the output ends of the first selector, the second selector and the third selector to output corresponding audio signals according to the priority of the input audio signals of the first selector, the second selector and the third selector;

and the third digital control audio processing chips and the fourth digital control audio processing chips are connected with the CPU, and the gain and the sound effect of the third digital control audio processing chips and the fourth digital control audio processing chips are adjusted by the CPU.

The second purpose of the invention is realized by the following technical scheme: a working method of the audio matrix host comprises the following steps:

setting the priority of each audio signal input into the CPU according to the source of each audio signal;

when the microphone controller receives the audio signal, the audio signal is sent to the CPU;

when the fire alarm linkage device receives a fire alarm trigger signal, the fire alarm trigger signal is sent to the CPU, when the CPU receives the fire alarm trigger signal, the CPU controls the fire alarm device to read an audio signal of the fire alarm from the first memory card, and after the fire alarm device reads the audio signal of the fire alarm from the first memory card, the fire alarm device sends the audio signal to the CPU;

after the trigger controller receives a timing trigger signal of an external timer sound source with a dry point trigger, the CPU reads an audio signal from the external timer sound source through the trigger controller;

after receiving each path of audio signal, the CPU acquires the destination of each path of audio signal, namely an audio region to which each path of audio signal is distributed; simultaneously comparing the priority of each audio signal to be distributed to the same audio zone for each audio zone; and then controls the digital audio media matrix to output the audio signal with the highest priority assigned to the same audio zone to the corresponding audio zone.

Preferably, the method further comprises the following steps:

the microphone workstation sends an audio frequency zone distribution control instruction to the CPU through the first controller, after the CPU receives the control instruction, the CPU judges whether the priority of the audio frequency signal output by the microphone workstation is the highest in the audio frequency signals distributed to the corresponding audio frequency zone, and if so, the CPU controls the digital audio frequency media matrix to send the audio frequency signal output by the microphone workstation to the corresponding audio frequency zone;

the microphone workstation adjusts the gain and the sound effect of the first digital control audio processing chip through the first controller so as to adjust the volume and the sound effect of the audio signal sent to the CPU by the microphone workstation;

the microphone workstation sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the first controller, and after the CPU receives the main volume adjusting signal and the main sound effect adjusting signal sent by the first controller of the microphone workstation, the CPU adjusts the volume and the sound effect of the audio signal output to the corresponding audio zone loudspeaker through the digital audio media matrix;

the remote control panel of each audio area selects audio signals output by a local audio source through the second controller, and the audio signals output by the local audio source are output to the remote controller after passing through the second digital control audio processing chip and then are sent to the CPU by the remote controller; if the audio signals distributed to the audio frequency zone where the remote control panel is located have the highest priority, the CPU controls the digital audio media matrix to output the audio signals to a loudspeaker of the audio frequency zone where the remote control panel is located;

the remote control panel sends an external sound source selection signal to the CPU through the second controller, after receiving the external sound source selection signal sent by the second controller, the CPU judges whether the priority of the audio signal output by the corresponding external sound source is the highest in the audio signals distributed to the audio zone where the remote control panel is located, and if so, the CPU controls the digital audio media matrix to output the audio signal corresponding to the external sound source to the loudspeaker of the audio zone where the remote control panel is located;

the remote control panel adjusts the gain and the sound effect of the second digital control audio processing chip through the second controller so as to adjust the volume and the sound effect of an audio signal sent to the CPU by a local audio source in the remote control panel;

the remote control panel sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the second controller, and the CPU controls the digital audio media matrix to adjust the volume and the sound effect of the audio signal output to the speaker in the audio frequency zone where the remote control panel is located after receiving the main volume adjusting signal and the main sound effect adjusting signal sent by the second controller of the remote control panel;

external equipment connected through a port of the CPU directly triggers the CPU to control the digital audio media matrix to adjust the volume and the sound effect of audio signals output to the loudspeakers of each audio zone; an external device connected through a CPU port triggers the CPU to select the sound source of each audio zone;

when the fire alarm linkage device receives a fire alarm trigger signal, the fire alarm trigger signal is sent to the CPU, the CPU controls the fire alarm device to read an audio signal of the fire alarm from the first storage card when receiving the fire alarm trigger signal, and the fire alarm device reads the audio signal of the fire alarm from the first storage card and then sends the audio signal to the CPU; or when the CPU receives a fire alarm trigger signal sent by the fire-fighting linkage device, the CPU acquires an audio signal sent by the external fire alarm sound source through the trigger controller and sends the fire alarm trigger signal to the outside through the trigger controller.

Furthermore, the CPU receives 28 audio signals, and the sources of the audio signals are as follows: wherein, the 1 st to 8 th audio signals come from 8 microphone workstations connected with a microphone controller, the 9 th to 16 th audio signals come from 8 external sound sources, the 17 th audio signal comes from a fire alarm, the 18 th audio signal comes from an external timer sound source connected with a trigger controller, the 19 th audio signal comes from an external fire alarm sound source connected with the trigger controller, the 20 th audio signal comes from a second memory card or an external U disk connected with a CPU, and the 21 st to 28 th audio signals come from a remote control panel of 8 audio zones connected with the remote controller;

1 or several of 8 microphone workstations are used as artificial emergency broadcast workstations, the rest microphone workstations are common broadcast workstations, and the priority of audio signals output by the artificial emergency broadcast workstations is set to be the highest; the priority of the 19 th audio signal from the external fire alarm sound source or the 17 th audio signal from the self-fire alarm is set as the second; the priority of the audio signal output by the common broadcasting workstation is set as the third; the priority of the 18 th path of audio signals from the timing external timer sound source is set to be the fourth path; the priority of the 21 st to 28 th audio signals from the remote control panel of 8 audio zones is set to fifth; setting the priority of the 9 th to 16 th audio signals from the external timer sound source as sixth; the priority of the 20 th audio signal from the second memory card or the external U disk is set to be seventh; wherein, several audio signals with the priority at the third have a certain priority order; when the audio signals distributed to a certain audio zone comprise a plurality of audio signals with the third priority, the CPU selects one audio signal with the top priority in the plurality of audio signals; the 19 th audio signal and the 17 th audio signal with the second priority have a certain priority order;

the CPU is accessed to the Ethernet and is connected with a remote computer through the Ethernet, and the remote computer monitors the CPU through software configured in the remote computer, sets the priority of each path of audio signal in the CPU, controls the CPU to select and receive the corresponding audio signal, and sends a main volume adjusting signal and an effect adjusting signal to the CPU.

The third purpose of the invention is realized by the following technical scheme: a public address system, comprising a plurality of audio matrix hosts according to any one of claims 1 to 4, wherein the CPUs in each audio matrix host are in cascade connection, the first stage CPU is a master CPU, and the other stages of CPUs are slave CPUs; after receiving each path of audio signal, the main CPU transmits each path of audio signal correspondingly received to each slave CPU step by step; at the moment, each CPU obtains the destination of each received audio signal from the main CPU, namely, the audio region to which each audio signal is distributed; and aiming at each audio frequency zone of the audio frequency matrix host where each CPU is positioned, comparing the priority of each audio frequency signal to be distributed to the same audio frequency zone, and then controlling the digital audio frequency media matrix to output the audio frequency signal with the highest priority distributed to the same audio frequency zone to the corresponding audio frequency zone.

Preferably, the audio matrix host comprises 32 audio matrix hosts according to any one of claims 1 to 4, wherein corresponding 32 CPUs of the 32 audio matrix hosts are in cascade connection; wherein each audio matrix host comprises 8 audio zones;

in each audio matrix host, the digital audio media matrix comprises 28 audio signal input ends, wherein the 1 st to 8 th audio signal input ends input 8 audio signals sent to the CPU by the microphone controller, the 9 th to 16 th audio signal input ends input 8 audio signals sent to the CPU by the external sound source, the 17 th audio signal input end inputs the audio signal sent to the CPU by the fire alarm, the 18 th audio signal input end inputs the audio signal sent to the CPU by the trigger controller and received from the external timer sound source, and the 19 th audio signal input end inputs the audio signal sent to the CPU by the trigger controller and received from the external fire alarm sound source; the 20 th audio signal input end inputs the audio signal read from the second memory card or the external U disk to the CPU; the 21 st to 28 th audio signal input ends input the audio signals output by the 8 remote audio signal output ends of the remote controller;

in each audio matrix host, the digital audio media matrix comprises a first selector, a second selector, a third selector and a third selector; the first selector is a 40-way 20-way selector, the second selector is a 28-way 8-way selector, and the third selector is a 36-way 1-way selector;

in each audio matrix host, when the CPU is the main CPU, the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected to the 20 input ends of the first selector through each third digital control audio processing chip; the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector; when the CPU is a slave CPU, the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected with the 20 input ends of the first selector through the third digital control audio processing chips; the other 20 input ends of the first selector input 20 paths of audio signals transmitted to the CPU by the CPU in the previous stage, and the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector;

in each audio matrix, 8 input ends of the second selector correspondingly input 8 paths of audio signals input to the CPU by the remote controller; 8 output ends of the second selector are respectively and correspondingly connected with 8 fourth digital control audio processing chips, and the 8 fourth digital control audio processing chips are respectively and correspondingly connected with 8 loudspeaker front-end power amplifiers of audio zones; 20 input ends of the third selector are correspondingly connected with 20 output ends of the first selector, 8 input ends of the third selector are correspondingly input with 8 paths of audio signals input to the CPU by the remote controller, 8 input ends of the third selector are respectively and correspondingly connected with output ends of 8 fourth digital control audio processing chips, and the output end of the third selector is connected with a local loudspeaker through a digital power amplifier to realize a monitoring function through the local loudspeaker;

in each audio matrix, the address ends of the first selector, the second selector and the third selector are respectively connected with a CPU (central processing unit), and the CPU controls the output ends of the first selector, the second selector and the third selector to output corresponding audio signals according to the priority of each input audio signal of the first selector, the second selector and the third selector;

in each audio matrix, the third digital control audio processing chips and the fourth digital control audio processing chips are connected with the CPU, and the CPU adjusts the gain and the sound effect of the third digital control audio processing chips and the fourth digital control audio processing chips.

The fourth purpose of the invention is realized by the following technical scheme: a working method of a public broadcasting system comprises the following steps:

setting the priority of each audio signal input into each cascaded CPU according to the source of each audio signal;

in an audio matrix host where a main CPU is located, when a microphone controller connected with the main CPU receives an audio signal, the audio signal is sent to the main CPU; when a fire alarm linkage device connected with a main CPU receives a fire alarm trigger signal, the fire alarm trigger signal is sent to the main CPU, when the main CPU receives the fire alarm trigger signal connected with the main CPU, the main CPU controls a fire alarm device connected with the main CPU to read an audio signal of a fire alarm from a first storage card, and after the fire alarm device connected with the main CPU reads the audio signal of the fire alarm from the first storage card, the audio signal is sent to the main CPU; after a trigger controller connected with a main CPU receives a timing trigger signal of an external timer sound source with a dry point trigger, the main CPU reads an audio signal from the external timer sound source through the trigger controller connected with the main CPU;

after receiving each path of audio signal, the master CPU transmits each path of audio signal to each slave CPU step by step, and each slave CPU obtains the destination of each path of audio signal through the master CPU, namely an audio area to which each path of audio signal is distributed; comparing the priority of each audio signal to be distributed to the same audio region aiming at each audio region of the audio matrix host where each CPU is located; each CPU then controls its connected digital audio media matrix to output the audio signal assigned to the same audio zone with the highest priority to the corresponding audio zone.

Preferably, the method further comprises the following steps:

in the audio matrix host where the main CPU is located, the microphone controller is connected with each microphone workstation through each microphone audio input port on the microphone controller; the first controller in each microphone workstation is connected with the main CPU;

the microphone workstation sends an audio frequency zone distribution control instruction to the master CPU through the first controller, the master CPU receives the control instruction and then transmits the control instruction to other slave CPUs step by step, each CPU respectively judges whether the priority of the audio frequency signal output by the microphone workstation is highest in the audio frequency signals distributed to the audio frequency zone corresponding to the audio frequency matrix host where the CPU is located, if so, each CPU controls the digital audio frequency media matrix connected with the CPU to send the audio frequency signal output by the microphone workstation to the corresponding audio frequency zone;

the microphone workstation adjusts the gain and the sound effect of the first digital control audio processing chip through the first controller so as to adjust the volume and the sound effect of an audio signal sent to the main CPU by the microphone workstation;

the microphone workstation sends a master volume adjusting signal and a master sound effect adjusting signal to a master CPU through a first controller, the master CPU receives the master volume adjusting signal and the master sound effect adjusting signal sent by the first controller of the microphone workstation, and then sends instructions to other slave CPUs step by step, and after each CPU receives the master volume adjusting signal and the master sound effect adjusting signal, the digital audio media matrix connected with each CPU adjusts the volume and sound effect of audio signals output to a corresponding audio zone loudspeaker;

in each audio matrix host, the remote control panel of each audio area selects audio signals output by a local audio source through a second controller, and the audio signals output by the local audio source are output to the remote controller after passing through a second digital control audio processing chip and then are sent to a CPU (central processing unit) by the remote controller; if the audio signals distributed to the audio frequency zone where the remote control panel is located have the highest priority, the CPU controls the digital audio media matrix to output the audio signals to a loudspeaker of the audio frequency zone where the remote control panel is located; in this embodiment, an operator may select an audio signal to be sent by a local audio source through a third touch screen in the remote control panel, and after the selection is performed through the third touch screen, the second controller may control the local audio source to output a corresponding audio signal;

in each audio matrix host, the remote control panel of each audio area sends an external sound source selection signal to the CPU through the second controller, after the CPU receives the external sound source selection signal sent by the second controller, the CPU judges whether the priority of the audio signal output by the corresponding external sound source in the audio signals distributed to the audio area where the remote control panel is located is the highest, if so, the digital audio media matrix is controlled to output the audio signal corresponding to the external sound source to a loudspeaker of the audio area where the remote control panel is located;

in each audio matrix host, the remote control panel of each audio area adjusts the gain and the sound effect of the second digital control audio processing chip through the second controller so as to adjust the volume and the sound effect of the audio signal sent to the CPU by the local audio source in the remote control panel;

in each audio matrix host, the remote control panel of each audio zone sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the second controller, and the CPU controls the digital audio media matrix to adjust the volume and sound effect of the audio signal output to the audio zone loudspeaker where the remote control panel is located after receiving the main volume adjusting signal sent by the second controller of the remote control panel;

in each audio matrix host, external equipment connected through a CPU port directly triggers a CPU to control a digital audio media matrix to adjust the volume and the sound effect of audio signals output to each audio zone loudspeaker of the audio matrix host; the external equipment connected through the port of the main CPU directly triggers the main CPU and the slave CPU controls the digital audio media matrix connected with the main CPU to adjust the volume and the sound effect of the audio signals output to the loudspeakers of each audio zone;

in each audio matrix host, an external device connected through a CPU port triggers a CPU to select a sound source of an audio zone of the audio matrix host; directly triggering the main CPU through external equipment connected with a port of the main CPU and controlling the selection of the sound source of each audio frequency zone by the auxiliary CPU;

when receiving a fire alarm trigger signal, a fire alarm linkage connected with a main CPU sends the fire alarm trigger signal to the main CPU, when receiving the fire alarm trigger signal connected with the main CPU, the main CPU controls a fire alarm connected with the main CPU to read an audio signal of a fire alarm from a first memory card, and after reading the audio signal of the fire alarm from the first memory card, the fire alarm connected with the main CPU sends the audio signal to the main CPU; or when the main CPU receives a fire alarm trigger signal sent by the fire-fighting linkage device connected with the main CPU, the main CPU acquires an audio signal sent by an external fire alarm sound source through the trigger controller connected with the main CPU, and sends the fire alarm trigger signal to the outside through the trigger controller connected with the main CPU.

Compared with the prior art, the invention has the following advantages and effects:

(1) The audio matrix host comprises a CPU, a digital audio media matrix, a microphone controller, a fire alarm, a fire linkage device and a trigger controller; the CPU receives audio signals from a microphone workstation through a microphone controller, receives audio signals related to fire alarm from a memory card through a fire alarm, receives audio signals from an external timer sound source through a trigger controller, acquires audio zones to which the audio signals are distributed after receiving the audio signals, compares the priority of the audio signals distributed to the same audio zone aiming at the audio zones, and finally outputs the audio signal distributed to the same audio zone with the highest priority to the corresponding audio zone through a digital audio media matrix. Therefore, the audio matrix host can play the audio signal with the highest priority in each audio zone according to the priority of each audio signal, and is very suitable for being used in places such as districts, markets, hotels, office districts, airports, docks, stations and the like. The audio matrix host integrates the CPU, the digital audio media matrix, the microphone controller, the fire alarm, the fire-fighting linkage device and the trigger controller into a whole, transmits audio signals and control signals in a bus-based mode, and has the advantages of simple structure and strong function; when a multi-sound source playing and full-function broadcasting system is formed, complex connection is not needed, and the installation space and the use cost are saved.

(2) The microphone workstation connected with the microphone controller in the audio matrix host comprises a microphone, a first controller, a first digital control audio processing chip and a second touch screen, wherein the volume and the sound effect of an audio signal output by the microphone workstation can be adjusted through the first digital control audio processing chip, meanwhile, the audio region distributed by the audio signal output by the microphone workstation can be set through the first controller, and in addition, the microphone workstation can also send a main volume adjusting signal and a main sound effect adjusting signal to a CPU (central processing unit) so as to trigger the CPU to adjust the volume and the sound effect of the audio signal output to the corresponding audio region. Therefore, a user can randomly adjust the volume, the sound effect and the distributed audio frequency zone at a microphone workstation according to actual requirements, and the flexibility of the use of the audio matrix host is improved. In addition, the adjustment of the volume and the sound effect and the selection of the audio frequency zone can be directly realized through the operation of the second touch screen, and the use of a user is very convenient.

(3) The CPU in the audio matrix host is connected with a remote controller, and is connected with the remote control panels of all audio areas through the remote controller, the remote control panel comprises a second controller, a local audio source, a second digital control audio processing chip and a third touch screen, and the volume and the sound effect of the audio signals output by the local audio source of the remote control panel can be adjusted through the second digital control audio processing chip; the invention can send the main volume adjusting signal and the main sound effect adjusting signal to the CPU through the second controller of the remote controller so as to trigger the CPU to adjust the volume and the sound effect of the audio signal output to the corresponding audio area. Meanwhile, the invention can select the audio signal output by the local audio source through the second controller, so that the user can select to play the corresponding music in the audio zone where the remote control panel is positioned according to the preference of the user. The invention can also select the external sound source from which the audio signal played in the audio zone is from through the second controller of the remote control panel. It can be seen that the invention can realize the remote control of the audio signals of the audio zone in which the remote control panel is positioned through the remote control panel. Brings great convenience to the user. And the operation can be realized through a third touch screen connected with a second controller in the remote control panel.

(4) In the audio matrix host, the CPU is connected with an external fire alarm sound source through the trigger controller, when the CPU receives a fire alarm trigger signal sent by the fire-fighting linkage device, the CPU can acquire the audio signal related to the fire alarm through the fire alarm device and also can acquire the audio signal related to the fire alarm sent by the external fire alarm sound source through the trigger controller, so that a user can play the corresponding fire alarm audio signal according to the requirement. The invention can also send fire alarm trigger signals to external equipment through the trigger controller, and further expands the use function of the audio matrix host. In addition, in the audio matrix host, the CPU is connected with the cut-to-force controller, and when the CPU receives a fire alarm trigger signal sent by the fire-fighting linkage device, the corresponding equipment of the cut-to-force controller stops running, so that the fire-fighting safety is ensured.

(5) In the audio matrix host, the CPU is connected with the first touch screen, and a user can realize interaction with the CPU through the first touch screen to realize control over the audio matrix host.

(6) The public broadcasting system is composed of a plurality of audio matrix hosts, wherein CPUs of the audio matrix hosts are in cascade connection, the master CPU transmits each audio signal to each slave CPU step by step after receiving each audio signal, and each slave CPU acquires the destination of each audio signal through the master CPU. Comparing the priority of each audio signal to be distributed to the same audio region aiming at each audio region of the audio matrix host where each CPU is located; each CPU then controls its connected digital audio media matrix to output the audio signal assigned to the same audio zone with the highest priority to the corresponding audio zone. Therefore, the public broadcasting system can expand the audio frequency zone in a mode of cascading the CPUs in the audio matrix hosts, only aims at the CPUs during cascading, does not need other equipment to generate connection relation, can be quickly assembled and obtained, and has the advantages of simple structure and strong anti-interference capability. Under the condition of cascading CPUs of 32 audio matrix mainframes, lossless transmission of audio signals can be realized, so that the number of audio zones can be expanded to 256, and the requirement of using in large places can be met.

(7) In the public broadcasting system, the audio signals, control signals and the like of each slave CPU are all from the master CPU and are controlled by the master CPU, so that the control of the audio signals of all audio zones, such as the volume and the sound effect adjustment of the audio signals output to each audio zone, the sound source selection of each audio zone and the like, can be realized only by corresponding operation of the master CPU.

Drawings

Fig. 1 is a block diagram of the structure of an audio matrix host according to the present invention.

Fig. 2a is a schematic circuit diagram of the main circuit of the trigger controller in the audio matrix host according to the present invention.

Fig. 2b is a schematic circuit diagram of the first power amplifier of the trigger controller in the audio matrix host according to the present invention.

Fig. 2c is a schematic circuit diagram of the second power amplifier of the trigger controller in the audio matrix host according to the present invention.

FIG. 3 is a schematic circuit diagram of a digital audio media matrix in the audio matrix host of the present invention.

Fig. 4 is a schematic diagram of the placement of audio zone number buttons in a second touch screen of the microphone workstation of the present invention.

Fig. 5 is a schematic diagram of a third touch screen of the remote control panel according to the present invention, in which a sound source number button of an external sound source is disposed.

Fig. 6 is a schematic diagram of the audio matrix host CPU connected to the first touch screen of the present invention when 16 audio source buttons are provided.

Fig. 7 is a schematic structural diagram of the cascade of CPUs in the public address system of the present invention.

FIG. 8 is a schematic circuit diagram of the digital audio media matrix in the audio matrix host where the slave CPU is located in the public address system of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Examples

The embodiment discloses an audio matrix host, which comprises a CPU, a digital audio media matrix, a microphone controller, a fire alarm, a fire linkage device, a remote controller, a trigger controller and a cut-through controller, as shown in FIG. 1;

in the embodiment, the microphone controller is provided with a plurality of microphone audio input ports, the microphone controller is connected with the CPU, and the audio signals input by the microphone controller audio input ports are sent to the CPU; in this embodiment, the microphone controller may use a microprocessor such as a single chip microcomputer.

In the embodiment, the fire alarm is connected with a first memory card which stores audio signals of fire alarms; the fire alarm is connected with the CPU, the CPU controls the fire alarm to read the audio signal from the first memory card and transmits the read audio signal to the CPU; the fire alarm in this embodiment can use microprocessors such as a single chip microcomputer.

In the embodiment, the fire-fighting linkage device is provided with a plurality of fire alarm trigger signal input ports, the fire-fighting linkage device is connected with the CPU and transmits the received fire alarm trigger signal to the CPU, and the CPU controls the fire alarm device to read the audio signal of the fire alarm from the first memory card when receiving the fire alarm trigger signal; the fire alarm trigger signal input ports of the fire-fighting linkage device can be connected with fire-fighting linkage switches in various places, and when the fire-fighting linkage switches are pressed down, the fire-fighting linkage device can receive the fire alarm trigger signals.

In the embodiment, the trigger controller is connected with an external timer sound source and an external fire alarm sound source which are triggered by the trunk points, the trigger controller is connected with the CPU, and the CPU receives an audio signal sent by the external timer sound source through the trigger controller after receiving a trunk point trigger signal of the external timer sound source through the trigger controller; when receiving a fire alarm trigger signal sent by a fire-fighting linkage device, the CPU obtains an audio signal sent by an external fire alarm sound source through a trigger controller, and sends the fire alarm trigger signal to the outside through the trigger controller;

the trigger controller in the embodiment comprises a main circuit, a first power amplifier and a second power amplifier;

as shown in fig. 2a, the main circuit includes a first optocoupler IS600, a second optocoupler IS601, a first relay K600C, and a second relay K601C; in this embodiment, the optical couplers IS600 and IS601 are of the type EL357. The first relay comprises two groups of contacts which are respectively a first group of contacts and a second group of contacts, the positive coil end of the first relay is connected with the negative coil end through a reverse diode D600, the positive coil end of the first relay is connected with a direct-current power supply 24V, the negative coil end of the first relay is connected with the collector electrode of an NPN triode Q600, the base electrode of the NPN triode Q600 is connected with the IO port of the CPU through a resistor R612, the base electrode of the NPN triode Q600 is grounded after being sequentially connected with the resistor R612 and a resistor R614, and the emitter electrode of the NPN triode Q600 is grounded; the first group of contacts of the first relay are composed of a first normally closed stationary contact, a first normally opened stationary contact and a first movable contact, the second group of contacts of the first relay are composed of a second normally closed stationary contact, a second normally opened stationary contact and a second movable contact, wherein the first movable contact and the second movable contact are both connected with one end of an external timer sound source trigger signal output, the first normally opened stationary contact and the second normally opened stationary contact are both connected with the other end of the external timer sound source trigger signal output, and the first normally opened stationary contact and the second normally opened stationary contact are grounded through a resistor R622. The first movable contact and the second movable contact are connected with a reverse diode D603 and a resistor R624 in series and then are connected with a first input port of a first optocoupler, and a direct current power supply +5V is connected with a second input port of the first optocoupler through a diode D601; a reverse diode D602 is connected between the first input port of the first optical coupler and the second input port of the first optical coupler, the output port of the first optical coupler is connected with a direct-current power supply of +3.3V through a resistor R615, and the output port of the first optical coupler is connected with an IO port of a CPU; the first input port of the first optical coupler and the second input port of the first optical coupler are respectively corresponding to the anode and the cathode of the light-emitting source in the first optical coupler. The second relay comprises two groups of contacts which are respectively a third group of contacts and a fourth group of contacts, the positive coil end of the second relay is connected with the negative coil end through a reverse diode D606, the positive coil end of the second relay is connected with a direct-current power supply 24V, the negative coil end of the second relay is connected with the collector electrode of an NPN triode Q601, the base electrode of the NPN triode Q601 is connected with the IO port of the CPU through a resistor R613, the base electrode of the NPN triode Q601 is grounded after being sequentially connected with a resistor R613 and a resistor R617, and the emitter electrode of the NPN triode Q601 is grounded; the third group contact of second relay is by the third normally closed stationary contact, third normally opens stationary contact and third movable contact and constitutes, second relay fourth group contact is by the fourth normally closed stationary contact, fourth normally opens stationary contact and fourth movable contact and constitutes, wherein the one end of external equipment fire alarm trigger signal input is all connected to third movable contact and fourth movable contact, the other end of external equipment fire alarm trigger signal input is all connected to third normally open stationary contact and fourth normally open stationary contact, third normally open stationary contact and fourth normally open stationary contact pass through resistance R623 ground connection. The third movable contact and the fourth movable contact are connected with a reverse diode D605 and a resistor R625 in series and then are connected with a first input port of a second optical coupler, and a direct current power supply +5V is connected with a second input port of the second optical coupler through a diode D601; a reverse diode D604 is connected between the first input port of the second optical coupler and the second input port of the second optical coupler, the output port of the second optical coupler is connected with a direct-current power supply of +3.3V through a resistor R616, and meanwhile, the output port of the second optical coupler is connected with an IO port of a CPU; the first input port of the second optical coupler and the second input port of the second optical coupler are respectively corresponding to the anode and the cathode of the internal luminous source of the second optical coupler.

As shown in fig. 2B, the first power amplifier includes a first operational amplifier U600A, a second operational amplifier U600B and a first potentiometer, wherein the first potentiometer is a sliding rheostat; the inverting input end of the first operational amplifier U600 is connected with the audio signal output negative terminal of the external timer sound source through a resistor R601 and an electrolytic capacitor E600 which are sequentially connected in series, wherein the positive electrode of the electrolytic capacitor E600 is connected with the audio output negative terminal of the external timer sound source, the non-inverting input end of the first operational amplifier U600A is connected with the audio input positive terminal of the external timer sound source through a resistor R601 and a capacitor E600 which are sequentially connected in series, and the negative electrode of the electrolytic capacitor E601 is connected with the audio output positive terminal of the external timer sound source. One end of the resistor R601 connected with the electrolytic capacitor E600 is connected with the resistor R608 and the nonpolar capacitor C601 which are connected in parallel and then grounded, one end of the resistor R602 connected with the electrolytic capacitor E601 is connected with the resistor R609 and the nonpolar capacitor C603 which are connected in parallel and then grounded, and the non-inverting input end of the first operational amplifier U600A is connected with the resistor R603 and the nonpolar capacitor C604 which are connected in parallel and then grounded. The inverting input terminal of the first operational amplifier U600A is connected to the output terminal of the first operational amplifier U600A after being connected to the resistor R600 and the non-polar capacitor C600 in parallel. The output end of the first operational amplifier U600A is connected with one end of a first potentiometer, the other end of the first potentiometer is grounded, the sliding end of the first potentiometer is connected with the inverting input end of the second operational amplifier U600B after being connected with the electrolytic capacitor E604 and the resistor R618 which are connected in series, the non-inverting input end of the second operational amplifier U600B is grounded, the inverting input end of the second operational amplifier U600B is connected with the output end of the second operational amplifier U600B after being connected with the resistor R620 and the non-polar capacitor C621 which are connected in parallel, the output end of the second operational amplifier U600B is connected with the IO port of the CPU, an audio signal output by the external timer is input into the CPU after passing through the first power amplifier, and the amplification factor of the first power amplifier can be adjusted through the first potentiometer.

As shown in fig. 2c, the second power amplifier includes a third operational amplifier U601A, a fourth operational amplifier U601B and a second potentiometer, wherein the second potentiometer is a sliding rheostat; the inverting input end of the third operational amplifier U600 is connected with the audio signal output negative terminal of the external fire alarm sound source through a resistor R605 and an electrolytic capacitor E602 which are sequentially connected in series, wherein the positive terminal of the electrolytic capacitor E602 is connected with the audio output negative terminal of the external fire alarm sound source, the non-inverting input end of the third operational amplifier U601B is connected with the audio input positive terminal of the external fire alarm sound source through a resistor R606 and an electrolytic capacitor E603 which are sequentially connected in series, and wherein the negative terminal of the electrolytic capacitor E603 is connected with the audio output positive terminal of the external fire alarm sound source. One end of the resistor R605 connected with the electrolytic capacitor E602 is connected with the resistor R610 and the nonpolar capacitor C606 which are connected in parallel and then grounded, one end of the resistor R606 connected with the capacitor E603 is connected with the resistor R611 and the nonpolar capacitor C608 which are connected in parallel and then grounded, and the non-inverting input end of the third operational amplifier U601B is connected with the resistor R607 and the nonpolar capacitor C609 which are connected in parallel and then grounded. The inverting input terminal of the third operational amplifier U601A is connected to the output terminal of the third operational amplifier U601A after being connected to the resistor R604 and the non-polar capacitor C605 in parallel. The output end of the third operational amplifier U601A is connected with one end of a second potentiometer, the other end of the second potentiometer is grounded, the sliding end of the second potentiometer is connected with an electrolytic capacitor E605 and a resistor R619 which are connected in series and then is connected with the inverting input end of a fourth operational amplifier U601B, the non-inverting input end of the fourth operational amplifier U601B is grounded, the inverting input end of the fourth operational amplifier U601B is connected with a resistor R621 and a non-polar capacitor C622 which are connected in parallel and then is connected with the output end of the fourth operational amplifier U601B, the output end of the fourth operational amplifier 601B is connected with the IO port of a CPU, an audio signal output by an external fire alarm source is input into the CPU after passing through a second power amplifier, and the amplification factor of the second power amplifier can be adjusted through the second potentiometer.

In this embodiment, the trigger controller receives a timing trigger signal sent by the external timing sound source through the main circuit, receives an audio signal sent by the external timing sound source through the first power amplifier, and sends the audio signal to the CPU. In this embodiment, the CPU sends a fire trigger signal through the main circuit of the trigger controller, receives an audio signal sent from the external fire sound source through the second power amplifier, and sends the audio signal to the CPU.

In the embodiment, the CPU is connected with the cut-through controller, the cut-through controller is connected with the equipment which needs to stop running when a fire alarm occurs, when the CPU receives a fire alarm trigger signal sent by the fire-fighting linkage device, the CPU sends a control signal to the cut-through controller, and the cut-through controller controls the equipment which needs to stop running when the fire alarm occurs to stop running. The force controller is a relay in this embodiment.

In this embodiment, the CPU is provided with a plurality of external audio input ports, is connected to an external sound source through the external audio input ports, and receives an audio signal sent by the external sound source; the external sound source can be CD, MP3, radio, computer, etc. In this embodiment, the CPU is provided with a plurality of external audio input ports, and is capable of connecting 8 external sound sources, where the external sound sources can provide audio signals such as background music.

In the present embodiment, the remote controller is provided with a plurality of remote audio signal input ports and a plurality of remote audio signal output ports; the remote controller is connected with each remote control panel arranged in each audio frequency zone through each remote audio frequency signal input port on the remote controller and is used for receiving the audio frequency signals sent by the remote control panel; the remote controller is connected with the CPU, and transmits the audio signals received by the remote controller from each remote control panel to the CPU through each remote audio signal output port on the remote controller; in the remote controller, every several remote audio signal input ports share one remote audio signal output port, wherein each remote audio signal input port connected with the remote control panel belonging to the same audio zone shares one remote audio signal output port, namely, audio signals sent to the remote controller by the remote control panel in the same audio zone are all output to a CPU through the same remote audio signal output port in the remote controller, and the CPU receives the audio signals sent by the remote controller and then sends the audio signals to the digital audio media matrix.

In this embodiment, the CPU is connected with a second memory card or an external usb disk.

In the embodiment, the CPU is connected with the digital audio media matrix, and after receiving audio signals from the microphone controller, the fire alarm, the external sound source, the trigger controller, the remote controller, the second storage and the external U disk, the CPU obtains the destination of each path of audio signals, namely, an audio frequency zone to which each path of audio signals is distributed; and simultaneously comparing the priority of each audio signal to be distributed to the same audio region for each audio region, and then controlling the digital audio media matrix to output the audio signal with the highest priority distributed to the same audio region to the corresponding audio region.

In this embodiment, a port of the CPU is connected to a first touch screen, and the first touch screen is a 7-inch capacitive touch color screen. In this embodiment, an operator may trigger the first controller to send a related control instruction signal or set a related parameter through the operation of the first touch screen. For example, the volume and sound effect of the audio signals output to the speakers of each audio zone can be adjusted for the digital audio media matrix by the operation of the first touch screen; the source of the audio signal to be received by the CPU can be set through the operation of the first touch screen; i.e. the CPU is arranged to receive a certain path or paths of audio signals.

In this embodiment, the microphone controller is connected to each microphone workstation through each microphone audio input port on the microphone controller; in this embodiment, the microphone workstation includes a microphone, a first controller, a first digitally controlled audio processing chip, and a second touch screen, wherein an audio signal output end of the microphone is connected to an input end of the first digitally controlled audio processing chip, and an output end of the first digitally controlled audio processing chip is connected to a microphone audio input port of the microphone controller; the first digital control audio processing chip is connected with a first controller, and the gain and the sound effect of the first digital control audio processing chip are adjusted through the first controller; the first controller is connected with the CPU, and the second touch screen is connected with the first controller. In this embodiment, the gain and the sound effect of the first digitally controlled audio processing chip connected to the first controller can be adjusted by operating on the second touch screen, so that the volume and the sound effect of the audio signal output by the microphone of the microphone workstation can be adjusted. In this embodiment, the destination, i.e. the audio zone to which the microphone workstation outputs the audio signal, can be selected by operation of the second touch screen.

In this implementation, each of the remote control panels includes a second controller, a local audio source, a second digitally controlled audio processing chip, and a third touch screen; the second controller is connected with the CPU, and the third touch screen is connected with the second controller; the second controller is connected with the local audio source and is used for selecting the audio signal output by the local audio source; the input end of the second digital control audio processing chip is connected with a local audio source, and the output end of the second digital control audio processing chip is connected with one remote audio signal input port of the remote controller through a signal line; the second controller is connected with the second digital control audio processing chip and is used for adjusting the gain and the sound effect of the second digital control audio processing chip. In this embodiment, the gain and the sound effect of the second digitally controlled audio processing chip connected to the second controller can be adjusted by operating on the third touch screen, so that the volume and the sound effect of the audio signal output by the local audio source of the remote control panel can be adjusted.

In this embodiment, the digital audio media matrix includes 28 audio signal input terminals, wherein, the 1 st to 8 th audio signal input terminals input 8 audio signals sent to the CPU by the microphone controller, the 9 th to 16 th audio signal input terminals input 8 audio signals sent to the CPU by the external sound source, the 17 th audio signal input terminal inputs an audio signal sent to the CPU by the fire alarm, the 18 th audio signal input terminal inputs an audio signal sent to the CPU by the trigger controller from the external timer sound source, and the 19 th audio signal input terminal inputs an audio signal sent to the CPU by the trigger controller from the external fire alarm sound source; the 20 th audio signal input end inputs the audio signal read from the second memory card or the external U disk to the CPU; the 21 st to 28 th audio signal input terminals input the audio signals output from the 8 remote audio signal output terminals of the remote controller, that is, the 8 th audio signals corresponding to the input from the 21 st to 28 th audio signal input terminals respectively correspond to the local audio sources of the remote control panel from the 8 audio zones, the 1 st audio signal input terminal corresponding to the input from the 21 st audio signal input terminal corresponds to the local audio source of the remote control panel from the first audio zone, and so on, the 28 th audio signal input terminal corresponding to the input 1 st audio signal input from the local audio source of the remote control panel from the eighth audio zone.

As shown in fig. 3, in the present embodiment, the digital audio media matrix includes a first selector, a second selector, a third selector and a third selector; the first selector is a 40-way 20-way selector, the second selector is a 28-way 8-way selector, and the third selector is a 36-way 1-way selector.

In this embodiment, the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected to the 20 input ends of the first selector through the third digital control audio processing chips; the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector, and the 8 input ends of the second selector correspondingly input 8 paths of audio signals input to the CPU by the remote controller; 8 output ends of the second selector are respectively and correspondingly connected with 8 fourth digital control audio processing chips, and the 8 fourth digital control audio processing chips are respectively and correspondingly connected with 8 loudspeaker front-end power amplifiers in audio zones; 20 input ends of the third selector are correspondingly connected with 20 output ends of the first selector, 8 input ends of the third selector are correspondingly input with 8 paths of audio signals input to the CPU by the remote controller, 8 input ends of the third selector are respectively and correspondingly connected with output ends of 8 fourth digital control audio processing chips, and the output end of the third selector is connected with a local loudspeaker through a digital power amplifier to realize a monitoring function through the local loudspeaker; the address ends of the first selector, the second selector and the third selector are respectively connected with a CPU, and the CPU controls the output ends of the first selector, the second selector and the third selector to output corresponding audio signals according to the priority of the audio signals input by the first selector, the second selector and the third selector; and the third digital control audio processing chips and the fourth digital control audio processing chips are connected with the CPU, and the gains and the sound effects of the third digital control audio processing chips and the fourth digital control audio processing chips are adjusted by the CPU.

In this embodiment, TM2314 may be used as the first digitally controlled audio processing chip, the second digitally controlled audio processing chip, the third digitally controlled audio processing chip, and the fourth digitally controlled audio processing chip.

The embodiment also discloses a working method of the audio matrix host, which comprises the following steps:

when the microphone controller receives the audio signal, the audio signal is sent to the CPU; when the fire alarm linkage device receives a fire alarm trigger signal, the fire alarm trigger signal is sent to the CPU, when the CPU receives the fire alarm trigger signal, the CPU controls the fire alarm device to read an audio signal of the fire alarm from the first storage card, and after the fire alarm device reads the audio signal of the fire alarm from the first storage card, the fire alarm device sends the audio signal to the CPU; after the trigger controller receives a timing trigger signal of an external timer sound source with a dry point trigger, the CPU reads an audio signal from the external timer sound source through the trigger controller;

after receiving each path of audio signal, the CPU acquires the destination of each path of audio signal, namely an audio region to which each path of audio signal is distributed; simultaneously comparing the priority of each path of audio signal to be distributed to the same audio zone for each audio zone; the digital audio media matrix is then controlled to output the audio signal assigned to the same audio zone with the highest priority to the corresponding audio zone. In this embodiment, the CPU sends the corresponding audio signal to the corresponding audio zone by controlling the address terminal signals of the first selector, the second selector, and the third selector in the digital audio media matrix. For example, the second microphone workstation sends out an audio signal, the destination of the audio signal sent out by the second microphone workstation is the first audio frequency zone, the CPU compares the priorities of the audio signals distributed to the first audio frequency zone, if the priority of the audio signal sent out by the second microphone workstation is the highest, the CPU controls the address terminal signals of the first selector, the second selector and the third selector in the digital audio media matrix, the audio signal sent out by the second microphone workstation passes through the three selectors, is finally output to the front-end power amplifier of each loudspeaker in the first audio frequency zone, and is amplified by the power amplifier and then is played through the loudspeaker.

In this embodiment, the operating method of the audio matrix host further includes the following steps:

the microphone workstation sends an audio frequency zone distribution control instruction to the CPU through the first controller, after the CPU receives the control instruction, the CPU judges whether the priority of the audio frequency signal output by the microphone workstation is the highest in the audio frequency signals distributed to the corresponding audio frequency zone, and if so, the CPU controls the digital audio frequency media matrix to send the audio frequency signal output by the microphone workstation to the corresponding audio frequency zone; in this embodiment, an operator may select an audio zone to which an audio signal output by the microphone workstation is to be allocated through the second touch screen in the microphone workstation, and after the audio signal is selected through the second touch screen, the first controller may send a corresponding audio zone allocation control instruction to the CPU, and after the CPU receives the control instruction, the CPU may know the destination of the audio signal output by the microphone workstation. Specifically, as shown in fig. 4, each audio Zone number button, such as Zone1, zone2 … Zone8, is arranged in the second touch screen, and when a certain audio Zone number button or buttons are selected, the first controller sends an audio Zone allocation control instruction to the CPU, which allocates the audio signal output from the microphone control station to the certain audio Zone or zones.

The microphone workstation adjusts the gain and the sound effect of the first digital control audio processing chip through the first controller so as to adjust the volume and the sound effect of the audio signal sent to the CPU by the microphone workstation; in this embodiment, the first controller may be triggered by the second touch screen in the microphone workstation to adjust the gain and sound effect of the first digitally controlled audio processing chip. Specifically, a volume adjusting button and an effect adjusting button are arranged in the second touch screen, and the first controller adjusts the gain and the sound effect of the first digital control audio processing chip through the operation of the volume adjusting button and the effect adjusting button.

The method comprises the steps that a microphone workstation sends a main volume adjusting signal and a main sound effect adjusting signal to a CPU through a first controller, after the CPU receives the main volume adjusting signal and the main sound effect adjusting signal sent by the first controller of the microphone workstation, the CPU adjusts the volume and the sound effect of audio signals output to a corresponding audio zone loudspeaker through a digital audio media matrix, namely, the CPU adjusts the volume and the sound effect of the audio signals output to the digital audio media matrix by the microphone workstation through the CPU by controlling the digital audio media matrix; in this embodiment, an operator may trigger the first controller to send a master volume adjusting signal and a master audio adjusting signal to the CPU through the second touch screen, and then the CPU adjusts the gain and the audio effect of the third digital control audio processing chip and/or the fourth digital control audio processing chip through which the audio signal is output by the microphone workstation according to the received master volume adjusting signal and master audio adjusting signal, so as to adjust the volume and the audio effect of the audio signal output by the microphone workstation to the audio region. Specifically, a main volume adjusting button and a main sound effect adjusting button are arranged in the second touch screen, and a main volume adjusting signal and a main sound effect adjusting signal are sent to the CPU by the first controller through operation of the main volume adjusting button and the main sound effect adjusting button.

The remote control panel of each audio area selects the audio signal output by the local audio source through the second controller, and the audio signal output by the local audio source is output to the remote controller after passing through the second digital control audio processing chip and then is sent to the CPU by the remote controller; if the priority of the audio signal output by the local audio source of the remote control panel is the highest in the audio signals distributed to the audio zone of the remote control panel, the CPU controls the digital audio media matrix to output the audio signal to the loudspeaker of the audio zone of the remote control panel; in this embodiment, an operator may select an audio signal to be sent by a local audio source through a third touch screen in the remote control panel, and after the selection is performed through the third touch screen, the second controller may control the local audio source to output a corresponding audio signal.

The remote control panel sends an external sound source selection signal to the CPU through the second controller, after receiving the external sound source selection signal sent by the second controller, the CPU judges whether the priority of the audio signal output by the corresponding external sound source is the highest in the audio signals distributed to the audio zone where the remote control panel is located, and if so, the CPU controls the digital audio media matrix to output the audio signal corresponding to the external sound source to the loudspeaker of the audio zone where the remote control panel is located; in this embodiment, the operator may select the external sound source of the audio signal to be received by the CPU through the third touch screen, and after the selection is performed through the third touch screen, the second controller may send a corresponding external sound source selection signal to the CPU. Specifically, as shown in fig. 5, the third touch screen has sound source serial numbers of external sound sources, such as Line1 and Line2 … Line8, and when a sound source serial number button is selected, the second controller sends an external sound source selection signal for selecting the external sound source corresponding to the sound source serial number to the CPU.

The remote control panel adjusts the gain and the sound effect of the second digital control audio processing chip through the second controller so as to adjust the volume and the sound effect of an audio signal sent to the CPU by a local audio source in the remote control panel; in this embodiment, an operator may trigger the second controller to adjust the gain and the sound effect of the second digitally controlled audio processing chip through the third touch screen. The method specifically comprises the following steps: and a volume adjusting button and an effect adjusting button are arranged in the third touch screen, and the second controller adjusts the gain and the sound effect of the second digital control audio processing chip through the operation of the volume adjusting button and the effect adjusting button.

The remote control panel sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the second controller, and the CPU controls the digital audio media matrix to adjust the volume and the sound effect of the audio signal output to the speaker in the audio frequency zone where the remote control panel is located after receiving the main volume adjusting signal and the main sound effect adjusting signal sent by the second controller of the remote control panel; in this embodiment, an operator may trigger the second controller to send a master volume adjusting signal and a master audio effect adjusting signal to the CPU through the third touch screen, and then the CPU adjusts the gain and the audio effect of the corresponding third digitally controlled audio processing chip and/or the corresponding fourth digitally controlled audio processing chip in the digital audio media matrix according to the received master volume adjusting signal and master audio effect adjusting signal, thereby realizing the volume and the effect adjustment of the audio signal output by the digital audio media matrix to the audio zone speaker where the remote control panel is located. Specifically, a main volume adjusting button and a main sound effect adjusting button are arranged in the third touch screen, and the second controller sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the operation of the main volume adjusting button and the main sound effect adjusting button.

Directly triggering the CPU to control the digital audio media matrix to adjust the volume and the sound effect of the audio signals output to the loudspeakers of each audio zone through external equipment connected with a CPU port; in this embodiment, a port of the CPU is connected to a first touch screen, and the CPU can be directly triggered to adjust the gain and the sound effect of the corresponding third digitally controlled audio processing chip and/or the corresponding fourth digitally controlled audio processing chip in the digital audio media matrix through the operation of the first touch screen, thereby realizing the adjustment of the volume and the sound effect of the audio signal output by the digital audio media matrix to the corresponding audio zone speaker. Specifically, a volume adjusting button and an effect adjusting button are arranged in the first touch screen, and the CPU is enabled to adjust the gain and the sound effect of the third digital control audio processing chip and/or the fourth digital control audio processing chip through the operation of the main volume adjusting button and the main effect adjusting button.

An external device connected through a CPU port triggers the CPU to select the sound source of each audio zone; in this embodiment, the selection of the sound source of each audio zone by the CPU is realized through the operation of the first touch screen, specifically, as shown in fig. 6, 17 sound source buttons are arranged in the first touch screen, including 8 external sound source buttons Line1 to Line8, and sound source buttons WP1 to WP8 provided by the remote control panel corresponding to 8 audio zones; and 1 sound source button from a second memory card or an external USB flash disk (such as MP 3) connected with the CPU, wherein when one sound source button is pressed, a corresponding sound source is selected for the corresponding audio zone. For example, if the sound source is to be selected for the first audio zone, one of the buttons of Line1 to Line8, WP1 and MP3 may be selected and clicked, if one of Line1 to Line8 is selected, the sound source of the first audio zone will be one of the 8 external sound sources, and if WP1 is selected, the sound source of the first audio zone will come from the remote control panel of the audio zone, as shown by selecting MP3, and the sound source of the first audio zone will come from the second memory card or the external usb disk.

In the above steps of this embodiment, when the fire alarm linkage receives the fire alarm trigger signal, the fire alarm trigger signal is sent to the CPU, and when the CPU receives the fire alarm trigger signal, the CPU can control the fire alarm to read the audio signal of the fire alarm from the first memory card, so as to send the audio signal to the CPU; the fire alarm sound source control system can also control the trigger controller to acquire the audio signal sent by the external fire alarm sound source so as to send the audio signal to the CPU, and meanwhile, the trigger controller sends a fire alarm trigger signal to external related equipment. The selection of the two operation modes can be set by an operator in the CPU.

In this embodiment, the CPU receives 28 audio signals, and the sources of the audio signals are as follows: wherein, the 1 st to 8 th audio signals come from 8 microphone workstations connected with a microphone controller, the 9 th to 16 th audio signals come from 8 external sound sources, the 17 th audio signal comes from a fire alarm, the 18 th audio signal comes from an external timer sound source connected with a trigger controller, the 19 th audio signal comes from an external fire alarm sound source connected with the trigger controller, the 20 th audio signal comes from a second memory card or an external U disk connected with a CPU, and the 21 st to 28 th audio signals come from a remote control panel of 8 audio zones connected with the remote controller;

1 or several microphone workstations in 8 microphone workstations are used as artificial emergency broadcast workstations, the rest microphone workstations are common broadcast workstations, and the priority of audio signals output by the artificial emergency broadcast workstations is set to be the highest; the priority of the 19 th audio signal from the external fire alarm sound source or the 17 th audio signal from the self-fire alarm is set as the second; the priority of the audio signal output by the common broadcasting workstation is set as the third; the priority of the 18 th path of audio signals from the timing external timer sound source is set to be the fourth path; the priority of the 21 st to 28 th audio signals from the remote control panel of 8 audio zones is set to fifth; setting the priority of the 9 th to 16 th audio signals from the external timer sound source as sixth; the priority of the 20 th audio signal from the second memory card or the external U disk is set to be seventh; wherein, several audio signals with the priority at the third have a certain priority order; that is, when the audio signal assigned to a certain audio zone includes a plurality of audio signals whose priority is the third, the CPU selects one of the plurality of audio signals whose priority is the first. The 19 th audio signal and the 17 th audio signal with the second priority have a certain priority sequence; the preferred sequence can be set according to requirements.

In this embodiment, the CPU is connected to the ethernet, and is connected to the remote computer via the ethernet, and the remote computer can monitor the CPU, set the priority of each audio signal in the CPU, select the sound source of the audio signal received by the CPU, and send the main volume adjustment signal and the audio adjustment signal to the CPU via the software configured in the remote computer or a corresponding SDK packet (software development kit) loaded in the system.

Example 2

The embodiment discloses a public broadcasting system, which comprises a plurality of audio matrix hosts in the embodiment 1, as shown in fig. 7, CPUs in the audio matrix hosts are in a cascade relationship, wherein a first-stage CPU is a master CPU, and other CPUs at different stages are slave CPUs; after receiving each path of audio signal, the main CPU transmits each path of audio signal correspondingly received to each slave CPU step by step; at the moment, each CPU obtains the destination of each received audio signal from the main CPU, namely, the audio region to which each audio signal is distributed; and aiming at each audio frequency zone of the audio frequency matrix host where each CPU is positioned, comparing the priority of each audio frequency signal to be distributed to the same audio frequency zone, and then controlling the digital audio frequency media matrix to output the audio frequency signal with the highest priority distributed to the same audio frequency zone to the corresponding audio frequency zone.

In this embodiment, the audio matrix host includes 32 audio matrix hosts in total, that is, 32 CPUs of the 32 audio matrix hosts are in cascade connection; wherein each audio matrix host comprises 8 audio zones; the present embodiment thus includes 256 audio zones in total for the common broadcast system. Wherein 8 audio zones of the audio matrix host where the 1 st CPU (the master CPU) in the cascade is located are defined as the 1 st to 8 th audio zones, 8 audio zones of the audio matrix host where the 2 nd CPU (the slave CPU) in the cascade is located are defined as the 9 th to 16 th audio zones, and so on, and 8 audio zones of the audio matrix host where the 32 nd CPU (the slave CPU) is located are defined as the 249 th to 256 th audio zones.

in each audio matrix host, the digital audio media matrix comprises a first selector, a second selector, a third selector and a third selector; the first selector is a 40-path 20-path selector, the second selector is a 28-path 8-path selector, and the third selector is a 36-path 1-path selector;

in each audio matrix host, when the CPU therein is the main CPU, as shown in fig. 8, the 1 st to 20 th audio signal input terminals of the digital audio media matrix are respectively connected to the 20 input terminals of the first selector through each third digital control audio processing chip; the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector; when the CPU is a slave CPU, as shown in fig. 8, the 1 st to 20 th audio signal input terminals of the digital audio media matrix are respectively connected to the 20 input terminals of the first selector through the third digital control audio processing chips; the other 20 input ends of the first selector input 20 paths of audio signals transmitted to the CPU by the CPU in the previous stage, and the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector;

in each audio matrix, 8 input ends of the second selector correspondingly input 8 paths of audio signals input to the CPU by the remote controller; 8 output ends of the second selector are respectively and correspondingly connected with 8 fourth digital control audio processing chips, and the 8 fourth digital control audio processing chips are respectively and correspondingly connected with 8 loudspeaker front-end power amplifiers in audio zones; 20 input ends of the third selector are correspondingly connected with 20 output ends of the first selector, 8 input ends of the third selector are correspondingly input with 8 paths of audio signals input to the CPU by the remote controller, 8 input ends of the third selector are respectively and correspondingly connected with output ends of 8 fourth digital control audio processing chips, and the output end of the third selector is connected with a local loudspeaker through a digital power amplifier to realize a monitoring function through the local loudspeaker;

in each audio matrix, the address ends of the first selector, the second selector and the third selector are respectively connected with a CPU, and the CPU controls the output ends of the first selector, the second selector and the third selector to output corresponding audio signals according to the priority of each input audio signal of the first selector, the second selector and the third selector;

The embodiment also discloses a working method of the public broadcasting system, which comprises the following specific steps:

after receiving each path of audio signal, the master CPU transmits each path of audio signal to each slave CPU step by step, and each slave CPU obtains the destination of each path of audio signal through the master CPU, namely an audio area to which each path of audio signal is distributed; aiming at each audio frequency zone of the audio frequency matrix host where each CPU is positioned, comparing the priority of each path of audio frequency signal to be distributed to the same audio frequency zone; each CPU then controls its connected digital audio media matrix to output the audio signal assigned to the same audio zone with the highest priority to the corresponding audio zone.

Wherein for each CPU, priority comparison and assigned processing is performed only for audio signals assigned to the audio zones of the audio matrix master in which it is located.

The working method of the public address system in this embodiment further includes the following steps:

in the audio matrix host where the main CPU is located, the microphone controller is connected with each microphone workstation through each microphone audio input port on the microphone controller; the first controller in each microphone workstation is connected with the main CPU; and other slave CPUs are not connected with the microphone workstation through the microphone controller.

The microphone workstation sends an audio frequency zone distribution control instruction to the master CPU through the first controller, the master CPU receives the control instruction and then transmits the control instruction to other slave CPUs step by step, each CPU respectively judges whether the priority of the audio frequency signal output by the microphone workstation is highest in the audio frequency signals distributed to the audio frequency zone corresponding to the audio frequency matrix host where the CPU is located, if so, each CPU controls the digital audio frequency media matrix connected with the CPU to send the audio frequency signal output by the microphone workstation to the corresponding audio frequency zone; wherein the audio zone allocation control instructions include information for allocating an audio signal output from the microphone workstation to one of the audio zones 1 st through 256. In this embodiment, an operator may select an audio zone to which an audio signal output by the microphone workstation is to be allocated through the second touch screen in the microphone workstation, and after the audio signal is selected through the second touch screen, the first controller may send a corresponding audio zone allocation control instruction to the main CPU, and after the main CPU receives the control instruction, the main CPU may know the destination of the audio signal output by the microphone workstation. Specifically, each audio Zone number button, such as Zone1, zone2 … Zone256, is arranged in the second touch screen, and when one or some audio Zone number buttons are selected, the first controller sends an audio Zone allocation control instruction for allocating the audio signal output by the microphone control station to one or some audio zones to the main CPU. And the main CPU transfers the audio signals to other slave CPUs step by step, so that the audio signals output by the microphone workstation are played by the loudspeaker in one or more audio zones.

The microphone workstation adjusts the gain and the sound effect of the first digital control audio processing chip through the first controller so as to adjust the volume and the sound effect of the audio signal sent to the main CPU by the microphone workstation; in this embodiment, the first controller may be triggered by the second touch screen in the microphone workstation to adjust the gain and sound effect of the first digitally controlled audio processing chip. Specifically, a volume adjusting button and an effect adjusting button are arranged in the second touch screen, and the first controller adjusts the gain and the sound effect of the first digital control audio processing chip through the operation of the volume adjusting button and the effect adjusting button.

The microphone workstation sends a master volume adjusting signal and a master sound effect adjusting signal to the master CPU through the first controller, the master CPU receives the master volume adjusting signal and the master sound effect adjusting signal sent by the first controller of the microphone workstation, and then the instructions are transmitted to other slave CPUs step by step, and after receiving the master volume adjusting signal and the master sound effect adjusting signal, the CPUs adjust the volume and sound effect of audio signals output to the loudspeakers of the audio frequency zones through the digital audio media matrixes connected with the CPUs. In this embodiment, an operator may trigger the first controller through the second touch screen to send a master volume adjustment signal and a master audio effect adjustment signal to the master CPU, and then the master CPU forwards the master volume adjustment signal and the master audio effect adjustment signal to other slave CPUs step by step, and each CPU adjusts the gain and the audio effect of the corresponding third digitally controlled audio processing chip and/or the corresponding fourth digitally controlled audio processing chip through which the audio signal output by the microphone workstation passes, according to the received master volume adjustment signal and master audio effect adjustment signal, thereby implementing the volume and audio effect adjustment of the audio signal output by the microphone workstation to the audio zone. Specifically, a main volume adjusting button and a main sound effect adjusting button are arranged in the second touch screen, and a main volume adjusting signal and a main sound effect adjusting signal are sent to the main CPU by the first controller through operation of the main volume adjusting button and the main sound effect adjusting button.

In each audio matrix host, the remote control panel of each audio area selects audio signals output by a local audio source through a second controller, and the audio signals output by the local audio source are output to the remote controller after passing through a second digital control audio processing chip and then are sent to the CPU by the remote controller; if the audio signals distributed to the audio frequency zone where the remote control panel is located have the highest priority, the CPU controls the digital audio media matrix to output the audio signals to a loudspeaker of the audio frequency zone where the remote control panel is located; in this embodiment, for each audio matrix host, an operator may select an audio signal to be sent by a local audio source through a third touch screen in the remote control panel, and after the selection is performed through the third touch screen, the second controller may control the local audio source to output a corresponding audio signal.

In each audio matrix host, the remote control panel in each audio area sends an external sound source selection signal to the CPU through the second controller, after the CPU receives the external sound source selection signal sent by the second controller, the CPU judges whether the priority of the audio signal output by the corresponding external sound source is highest in the audio signals distributed to the audio area where the remote control panel is located, and if so, the digital audio media matrix is controlled to output the audio signal corresponding to the external sound source to the loudspeaker of the audio area where the remote control panel is located. In this embodiment, for each audio matrix host, an operator may select an external sound source of an audio signal to be received by the CPU through the third touch screen, and after the selection is performed through the third touch screen, the second controller may send a corresponding external sound source selection signal to the CPU. Specifically, the sound source serial numbers of the external sound sources are arranged in the third touch screen, and when a sound source serial number button is selected, the second controller sends an external sound source selection signal for selecting the sound source serial number corresponding to the external sound source to the CPU.

In each audio matrix host, the remote control panel of each audio area adjusts the gain and the sound effect of the second digital control audio processing chip through the second controller so as to adjust the volume and the sound effect of the audio signal sent to the CPU by the local audio source in the remote control panel; in this embodiment, for each audio matrix host, an operator may trigger the second controller to adjust the gain and the sound effect of the second digitally controlled audio processing chip through the third touch screen. The method comprises the following specific steps: and a volume adjusting button and an effect adjusting button are arranged in the third touch screen, and the second controller adjusts the gain and the sound effect of the second digital control audio processing chip through the operation of the volume adjusting button and the effect adjusting button.

In each audio matrix host, the remote control panel of each audio zone sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the second controller, and the CPU controls the digital audio media matrix to adjust the volume and sound effect of the audio signal output to the audio zone loudspeaker where the remote control panel is located after receiving the main volume adjusting signal sent by the second controller of the remote control panel; in this embodiment, for each audio matrix host, an operator may trigger the second controller through the third touch screen to send a master volume adjustment signal and a master audio effect adjustment signal to the CPU, and then the CPU adjusts the gain and the audio effect of the corresponding third digitally controlled audio processing chip and/or the corresponding fourth digitally controlled audio processing chip in the digital audio media matrix according to the received master volume adjustment signal and master audio effect adjustment signal, thereby realizing the volume and audio effect adjustment of the audio signal output by the digital audio media matrix to the audio zone speaker where the remote control panel is located. Specifically, a main volume adjusting button and a main sound effect adjusting button are arranged in the third touch screen, and the second controller sends a main volume adjusting signal and a main sound effect adjusting signal to the CPU through the operation of the main volume adjusting button and the main sound effect adjusting button.

In each audio matrix host, external equipment connected through a CPU port directly triggers a CPU to control a digital audio media matrix to adjust the volume and the sound effect of audio signals output to each audio zone loudspeaker of the audio matrix host; the method comprises the steps that a main CPU is directly triggered by external equipment connected with a port of the main CPU, and a slave CPU controls a digital audio media matrix connected with the main CPU to adjust the volume and the effect of audio signals output to speakers of each audio zone, namely when the port of the main CPU receives the volume and effect adjustment trigger signals of the external equipment, the volume and effect adjustment trigger signals are simultaneously sent to other slave CPUs, and the main CPU and each slave CPU control the digital audio media matrix connected with the main CPU to adjust the volume and the effect of the audio signals output to the speakers of each audio zone according to the volume and effect adjustment trigger signals. The external equipment connected with each CPU port is a first touch screen; in this embodiment, in each audio matrix host, the volume and the sound effect of the audio signals of the 8 audio zone speakers of the audio matrix host where the CPU is located may be adjusted through the first touch screen connected to each CPU port. The audio signals of the 256 audio zone speakers can also be adjusted in volume and sound effect through the first touch screen connected to the main CPU port.

In each audio matrix host, an external device connected through a CPU port triggers a CPU to select a sound source of an audio zone of the audio matrix host; directly triggering the main CPU through external equipment connected with a port of the main CPU and controlling the selection of the sound source of each audio frequency zone by the auxiliary CPU; that is, in this embodiment, in each audio matrix host, the sound sources of the 8 audio zones of the audio matrix host where the CPU is located may be selected through the first touch screen connected to each CPU port. The selection of the sound sources of the 256 audio zones can also be realized through the first touch screen connected with the main CPU port.

When a fire alarm linkage device connected with a main CPU receives a fire alarm trigger signal, the fire alarm trigger signal is sent to the main CPU, when the main CPU receives the fire alarm trigger signal connected with the main CPU, the fire alarm device connected with the main CPU is controlled to read an audio signal of a fire alarm from a first storage card, the fire alarm device connected with the main CPU reads the audio signal of the fire alarm from the first storage card and sends the audio signal to the main CPU, and the main CPU gradually sends the audio signal to other slave CPUs after receiving the audio signal; or when the main CPU receives the fire alarm trigger signal sent by the fire-fighting linkage device connected with the main CPU, the main CPU acquires the audio signal sent by the external fire alarm sound source through the connected trigger controller and sends the fire alarm trigger signal to the outside through the connected trigger controller.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. An audio matrix host is characterized by comprising a CPU, a digital audio media matrix, a microphone controller, a fire alarm, a fire linkage device and a trigger controller;

the CPU is provided with a plurality of external audio input ports, is connected with an external sound source through the external audio input ports and receives audio signals sent by the external sound source;

2. The audio matrix host according to claim 1, wherein the trigger controller is connected to an external fire alarm sound source, and when receiving a fire alarm trigger signal sent by a fire-fighting linkage, the CPU obtains an audio signal sent by the external fire alarm sound source through the trigger controller, and sends the fire alarm trigger signal to the outside through the trigger controller; the CPU is connected with a cut-through controller, the cut-through controller is connected with equipment which needs to stop running when a fire alarm occurs, when the CPU receives a fire alarm trigger signal sent by a fire-fighting linkage device, the CPU sends a control signal to the cut-through controller, and the cut-through controller controls the equipment which needs to stop running when the fire alarm occurs to stop running;

the CPU is connected with a first touch screen.

3. The audio matrix host of claim 1, wherein the microphone controller is connected to the microphone workstations via microphone audio input ports;

4. The audio matrix host of claim 1, further comprising a remote controller provided with a plurality of remote audio signal input ports and a plurality of remote audio signal output ports; the remote controller is connected with each remote control panel arranged in each audio frequency zone through each remote audio frequency signal input port on the remote controller and is used for receiving the audio frequency signals sent by the remote control panel; the remote controller is connected with the CPU, and transmits the audio signals received from each remote control panel to the CPU through each remote audio signal output port on the remote controller; in the remote controller, every several remote audio signal input ports share one remote audio signal output port, wherein each remote audio signal input port connected with a remote control panel belonging to the same audio zone shares one remote audio signal output port, namely, audio signals sent to the remote controller by the remote control panel in the same audio zone are all output to a CPU through the same remote audio signal output port in the remote controller, the CPU receives the audio signals sent by the remote controller and then sends the audio signals to a digital audio media matrix, and then the digital audio media matrix is controlled according to the priority of the audio signals to output corresponding audio signals to each audio zone;

5. The audio matrix host of claim 4, wherein the digital audio media matrix comprises 28 audio signal inputs, wherein the 1 st to 8 th audio signal inputs input 8 audio signals sent from the microphone controller to the CPU, the 9 th to 16 th audio signal inputs 8 audio signals sent from the external sound source to the CPU, the 17 th audio signal input inputs audio signals sent from the fire alarm to the CPU, the 18 th audio signal input inputs audio signals received from the external timer sound source and sent to the CPU by the trigger controller, and the 19 th audio signal input inputs audio signals received from the external fire alarm sound source and sent to the CPU by the trigger controller; the 20 th audio signal input end inputs the audio signal read from the second memory card or the external U disk to the CPU; the 21 st to 28 th audio signal input ends input the audio signals output by the 8 remote audio signal output ends of the remote controller;

6. A method for operating an audio matrix host according to claim 1, comprising the steps of:

after receiving each path of audio signal, the CPU acquires the destination of each path of audio signal, namely an audio region to which each path of audio signal is distributed; simultaneously comparing the priority of each audio signal to be distributed to the same audio zone for each audio zone; the digital audio media matrix is then controlled to output the audio signal assigned to the same audio zone with the highest priority to the corresponding audio zone.

7. The method of claim 6, further comprising the steps of:

the remote control panel of each audio area selects the audio signal output by the local audio source through the second controller, and the audio signal output by the local audio source is output to the remote controller after passing through the second digital control audio processing chip and then is sent to the CPU by the remote controller; if the audio signals distributed to the audio frequency zone where the remote control panel is located have the highest priority, the CPU controls the digital audio media matrix to output the audio signals to a loudspeaker of the audio frequency zone where the remote control panel is located;

8. The operating method of the audio matrix host according to claim 6 or 7, wherein the CPU receives 28 audio signals, and the sources of the audio signals are as follows: wherein, the audio signals of 1 st to 8 th paths are from 8 microphone workstations connected with a microphone controller, the audio signals of 9 th to 16 th paths are from 8 external sound sources, the audio signals of 17 th path are from a fire alarm, the audio signals of 18 th path are from an external timer sound source connected with a trigger controller, the audio signals of 19 th path are from an external fire alarm sound source connected with the trigger controller, the audio signals of 20 th path are from a second memory card or an external U disk connected with a CPU, and the audio signals of 21 st to 28 th path are from 8 audio frequency remote control panels connected with a remote controller;

1 or several of 8 microphone workstations are used as artificial emergency broadcast workstations, the rest microphone workstations are common broadcast workstations, and the priority of audio signals output by the artificial emergency broadcast workstations is set to be the highest; the priority of the 19 th audio signal from the external fire alarm sound source or the 17 th audio signal from the self-fire alarm is set as the second; the priority of the audio signal output by the common broadcasting workstation is set as the third; the priority of the 18 th audio signal from the sound source of the external timer is set to be fourth; the priority of the 21 st to 28 th audio signals from the remote control panel of 8 audio zones is set to fifth; setting the priority of the 9 th to 16 th audio signals from the external timer sound source as sixth; the priority of the 20 th audio signal from the second memory card or the external U disk is set to be seventh; wherein, several audio signals with the priority at the third have a certain priority order; when the audio signals distributed to a certain audio zone comprise a plurality of audio signals with the third priority, the CPU selects one audio signal with the top priority in the plurality of audio signals; the 19 th audio signal and the 17 th audio signal with the second priority have a certain priority order;

9. A public broadcasting system, comprising a plurality of audio matrix hosts according to any one of claims 1 to 4, wherein CPUs in each audio matrix host are in cascade connection, wherein a first-stage CPU is a master CPU, and other CPUs in each stage are slave CPUs; after receiving each path of audio signal, the master CPU transmits each path of audio signal correspondingly received to each slave CPU step by step; at the moment, each CPU obtains the destination of each received audio signal from the main CPU, namely, the audio region to which each audio signal is distributed; and aiming at each audio frequency zone of the audio frequency matrix host where each CPU is positioned, comparing the priority of each audio frequency signal to be distributed to the same audio frequency zone, and then controlling the digital audio frequency media matrix to output the audio frequency signal with the highest priority distributed to the same audio frequency zone to the corresponding audio frequency zone.

10. The public address system of claim 9, comprising 32 audio matrix hosts according to any one of claims 1 to 4, wherein the 32 CPUs of the 32 audio matrix hosts are in cascade connection; wherein each audio matrix host comprises 8 audio zones;

in each audio matrix host, when the CPU is the main CPU, the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected with the 20 input ends of the first selector through each third digital control audio processing chip; the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector; when the CPU is a slave CPU, the 1 st to 20 th audio signal input ends of the digital audio media matrix are respectively connected with the 20 input ends of the first selector through the third digital control audio processing chips; the other 20 input ends of the first selector input 20 paths of audio signals transmitted to the CPU by the CPU in the previous stage, and the 20 output ends of the first selector are correspondingly connected with the 20 input ends of the second selector;

11. A method of operating a public address system according to claim 9, comprising the steps of:

12. The method for operating a public address system according to claim 11, further comprising the steps of:

the microphone workstation sends an audio frequency region distribution control instruction to the main CPU through the first controller, the main CPU transmits the control instruction to other slave CPUs step by step after receiving the control instruction, each CPU respectively judges whether the priority of the audio frequency signal output by the microphone workstation is the highest in the audio frequency signals distributed to the audio frequency region corresponding to the audio frequency matrix host in which the CPU is located, if so, each CPU controls the digital audio frequency media matrix connected with the CPU to send the audio frequency signal output by the microphone workstation to the corresponding audio frequency region;

in each audio matrix host, the remote control panel of each audio area selects audio signals output by a local audio source through a second controller, and the audio signals output by the local audio source are output to the remote controller after passing through a second digital control audio processing chip and then are sent to the CPU by the remote controller; if the audio signals distributed to the audio frequency zone where the remote control panel is located have the highest priority, the CPU controls the digital audio media matrix to output the audio signals to a loudspeaker of the audio frequency zone where the remote control panel is located; in this embodiment, an operator may select an audio signal to be sent by a local audio source through a third touch screen in the remote control panel, and after the audio signal is selected through the third touch screen, the second controller may control the local audio source to output a corresponding audio signal;

in each audio matrix host, directly triggering a CPU to control a digital audio media matrix through external equipment connected with a CPU port to adjust the volume and the sound effect of audio signals output to each audio zone loudspeaker of the audio matrix host; directly triggering the main CPU through an external device connected with a port of the main CPU and controlling a digital audio media matrix connected with the main CPU by the auxiliary CPU to adjust the volume and the sound effect of audio signals output to the loudspeakers of each audio zone;

in each audio matrix host, an external device connected through a CPU port triggers a CPU to select a sound source of an audio zone of the audio matrix host; directly triggering the main CPU through an external device connected with the port of the main CPU and controlling the selection of the sound source of each audio zone by the auxiliary CPU;

when the main CPU receives the fire alarm triggering signal, the fire alarm linkage device connected with the main CPU controls the fire alarm device connected with the main CPU to read the audio signal of the fire alarm from the first storage card, and after the fire alarm device connected with the main CPU reads the audio signal of the fire alarm from the first storage card, the audio signal is sent to the main CPU; or when the main CPU receives the fire alarm trigger signal sent by the fire-fighting linkage device connected with the main CPU, the main CPU acquires the audio signal sent by the external fire alarm sound source through the connected trigger controller and sends the fire alarm trigger signal to the outside through the connected trigger controller.