CN209017052U - A kind of Multifunctional audio intelligent switch - Google Patents

Abstract

The utility model discloses a kind of Multifunctional audio intelligent switch, including front panel, rear panel and the signal processing controller being set to inside equipment, the signal processing controller includes FPGA+MCU module, digital audio transceiver, AD adapter, DA adapter etc., FPGA+MCU module is separately connected digital signal transceiver, AD adapter, DA adapter, the utility model uses digitized audio frequency processing technique, multi-C vector included angle cosine technology, logic analysis technology, network communications technology etc., other than the real-time monitoring to audio level automatically switches the function in channel, using analogue audio frequency and digital audio identical platform mixed processing mode, it takes the lead in audio content uniformity comparison technology being applied to this field of audio switch simultaneously.The use for greatly reducing logic chip simplifies the design of wiring board.

Description

A kind of Multifunctional audio intelligent switch

Technical field

The utility model relates to a kind of audio switch, specifically a kind of Multifunctional audio intelligent switch.

Background technique

With the needs that the development of radio and television services and " safe broadcast " management require, all kinds of broadcasting agency's multichannels are more The case where type audio information source, is generally existing, and audio switch plays the work of the management switching of multiple source in actual operation With there are two types of working methods, and one is switching over manually according to demand, another kind is by the electricity to input audio signal The case where audio signal is lost in flat detection switches over automatically, but they are carried out in face of same type of audio signal Processing, because digital audio and video signals and analog audio signal are essentially different and input impedance is widely different, does not have still at present Have digital audio and video signals and the unified precedent handled within one device of analog audio signal, but difference in practical work The audio sources of the identical content of type can be found everywhere, and can handle after needing a large amount of adapting appts to carry out Signal Matching in the past, Both waste money, which had had, complicates signal processing link.

In designing in use, being detected and being controlled primarily directed to the physical features of signal for traditional audio switch System, it is hidden to be far from satisfying the great broadcast accident such as " safe broadcast " needs, especially " intercutting ", " mistake is broadcast " in actual operation Suffer from often ignored in existing supervisory system, the important unit that the wireless broadcast transmission station is propagated as audio program, directly Junction is to mass audience, once there is the broadcast accident of " mistake is broadcast ", " intercutting ", gently in the routine work of wireless broadcast transmission platform It then disturbs mass audience's normal program to listen to, the serious turmoil that will cause society.Therefore wireless broadcast transmission platform broadcasts section The safety of mesh content just like has become the component part of core in " safe broadcast " work.

Utility model content

The purpose of this utility model is to provide a kind of Multifunctional audio intelligent switch, to solve in above-mentioned background technique The problem of proposition.

To achieve the above object, the utility model provides the following technical solutions:

A kind of Multifunctional audio intelligent switch, at front panel, rear panel and the signal that is set to inside equipment Controller is managed, the signal processing controller includes FPGA+MCU module, digital audio transceiver, AD adapter, DA adapter Deng FPGA+MCU module is separately connected digital signal transceiver, AD adapter, DA adapter etc..

Further technical solution as the utility model: it is aobvious that the front panel is equipped with power switch, dual power supply state Show lamp, manual/auto state display lamp, manual/auto switching key, information source channel display lamp, information source channel selection switch, net Network state display lamp and liquid crystal screen displays.

Further technical solution as the utility model: rear panel is equipped with input 1 digital audio of information source channel input Interface (three string holes Shi Kanong) inputs 1 analog audio input interface of information source channel (five string holes Shi Kanong), and input information source is logical 2 digital audio input interface of road (three string holes Shi Kanong) inputs 2 analog audio input interface of information source channel (five string holes formula cards Agriculture head), it inputs 3 digital audio input interface of information source channel (three string holes Shi Kanong), inputs 3 analog audio input of information source channel Interface (five string holes Shi Kanong) inputs 4 digital audio input interface of information source channel (three string holes Shi Kanong), and input information source is logical 4 analog audio input interface of road (five string holes Shi Kanong), tri- line pin type of digital audio output interface 1(Shi Kanong), number Tri- line pin type card agriculture head of audio output interface 2(), five line pin type card agriculture head of analogue audio frequency output interface 1(), analogue audio frequency output Five line pin type card agriculture head of interface 2(), Ethernet interface (RJ45), dual-power module (online plug-type).

Further technical solution as the utility model: the audio processing modules are exported equipped with two-way.

Further technical solution as the utility model: Ethernet interface is additionally provided in the FPGA and MCU module.

Further technical solution as the utility model: information source input channel has 4, and each information source input channel is simultaneously Or it is respectively connected to digital audio and video signals and analog audio signal.

Compared with prior art, the utility model has the beneficial effects that using Embedded Hardware Platform, with FPGA+MCU shape Microsever is core, realizes the transcoding of audio, measurement, spectrum analysis, inquiry synchronization, logic analysis, automatic alarm, automatically Switching, digitalized network output are remotely controlled the functions such as switching, largely use " programmable " hardware design in equipment interior design and think Think, simplify logic chip and use, simplify wiring board design, by hardware and software, such design philosophy in practical applications will System risk is substantially reduced, system effectiveness is improved, reduces equipment power dissipation, the safety of equipment will obtain sound assurance.

Detailed description of the invention

Fig. 1 is the overall diagram of the utility model.

Fig. 2 is the schematic diagram of signal processing controller.

Fig. 3 is the schematic diagram of front panel.

Fig. 4 is the schematic diagram of rear panel.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Please refer to Fig. 1-4, a kind of Multifunctional audio intelligent switch, using Embedded Hardware Platform, with FPGA+MCU shape Microsever is core, realizes the transcoding of audio, measurement, spectrum analysis, inquiry synchronization, logic analysis, automatic alarm, automatically Switching, digitalized network output are remotely controlled the functions such as switching, largely use " programmable " hardware design in equipment interior design and think Think, simplify logic chip and use, simplify wiring board design, by hardware and software, such design philosophy in practical applications will System risk is substantially reduced, system effectiveness is improved, reduces equipment power dissipation, the safety of equipment will obtain sound assurance, Equipment provides four road audio sources input channels, and every paths can arbitrarily input analogue audio frequency and digital audio and video signals, There are the output of two-way mirror-type digital audio and video signals, the output of two-way mirror-type analog audio signal simultaneously.In order to improve equipment not The time is operated intermittently, equipment devises dual power supply working method, and each power module supports warm connection function.Before equipment On panel, there is the liquid crystal display of human-computer interaction, the operating parameter of equipment can be configured by setting, on the screen may be used It shows the Dynamic Cylindrical figure of four road audio input signals, the working condition for arriving each road information source can be intuitively supervised in equipment.Together When devise channel indicator light, can observe the resident channel of signal at a glance, Multifunctional audio intelligent switch retains Manual, automatic two kinds of working methods have reserved mode switching key and channel selecting key in case different application environment It needs.

Different types of audio signal is carried out digitlization normalization first by Multifunctional audio intelligent switch, unified to count The level of the road Suan Ge signal judges the presence or absence of signal by two conditions: first, real time discriminating audio signal Level value meets once lower than condition if given threshold；Second, if first condition continues completely within the period of setting Foot, then second necessary condition is also set up.When two conditions meet simultaneously it is considered that the channel information source is lost.Level alarm Thresholding and alarm delay time can will be automatically switched in backup source by systemic presupposition, main road information source loss, once it is main The input signal that road information source restores transmitter will automatically switch back in main road information source, and switch has the output of two-way information source, often The selection that the output of road signal can carry out digital or analog signal can be conveniently configured according to the actual needs of transmitting station.

Multipath audio signal content consistency is compared and is monitored, at dedicated multi-C vector included angle cosine mathematical algorithm Reason obtains the characteristic index of the physical quantity of audio signal, says that the characteristic index of different audio samples is compared, similar according to its The degree of degree judges whether audio sample is consistent.Since the technology is the physics-mechanics character for being conceived to audio itself, audio The content situation of signal does not have any influence to alignment algorithm.

The major function of Multifunctional audio intelligent switch is as follows:

1. having four road audio sources input channels, each channel can any input digital audio signal or analogue audio frequency letter Number.

2. the signal level of each road audio signal of real time discriminating is realized that audio is lost and is automatically switched.

3. having the output of two-way mirror-type digital audio and video signals, the output of two-way mirror-type analog audio signal.

4. pair output a four road signals carry out content comparison, when occur signal it is inconsistent when, carry out warning note.

5. realizing the audio timing synchronization of different routing link transmission signals.

6. the state of the active and standby multi-information source of real time discriminating, in front on plate LCD screen can real-time display audio status and Dynamic Cylindrical figure.

7. supporting digital remote remote control and local hand/be automatically brought into operation switching；

8. each road audio signal audio loss alarm thresholding, alarm delay setting, can solely set locally or through digital interface It sets.

9. having pad sound audio broadcasts function, pad sound is carried out under all audio loss situations and is broadcasted.

10. the sine wave standard signal of exportable 1Khz is tested in indicator transmitter and is used；

11, there is ethernet communication interface, the output of tetra- road audio sources Signal coding of Ke Jiang.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (5)

1. a kind of Multifunctional audio intelligent switch, including front panel, rear panel and the signal processing being set to inside equipment Controller, which is characterized in that signal processing controller includes FPGA and MCU module, digital audio transceiver, AD adapter and DA Adapter, FPGA+MCU module are separately connected digital signal transceiver and AD adapter, in FPGA and MCU module there are six connections Digital audio transceiver, wherein independent AD adapter and digital audio chip are respectively connected on four digital audio transceivers, DA adapter and OLED liquid crystal and keyboard there are two being also connected in AD adapter connection analog audio signal, FPGA and MCU module Module.

2. a kind of Multifunctional audio intelligent switch according to claim 1, which is characterized in that the front panel is equipped with Power switch, dual power supply state display lamp, manual/auto state display lamp, manual/auto switching key, information source channel are shown Lamp, information source channel selection switch, network state display lamp and liquid crystal screen displays.

3. a kind of Multifunctional audio intelligent switch according to claim 1, which is characterized in that the rear panel is equipped with Input 1 digital audio input interface of information source channel, input 1 analog audio input interface of information source channel, 2 number of input information source channel Audio input interface, input 2 analog audio input interface of information source channel, input 3 digital audio input interface of information source channel, input 3 analog audio input interface of information source channel, input 4 digital audio input interface of information source channel, input 4 analogue audio frequency of information source channel Input interface, digital audio output interface 1, digital audio output interface 2, analogue audio frequency output interface 1, analogue audio frequency output connect Mouth 2, Ethernet interface and dual-power module.

4. a kind of Multifunctional audio intelligent switch according to claim 1, which is characterized in that the FPGA and MCU mould Ethernet interface is additionally provided on block.

5. a kind of Multifunctional audio intelligent switch according to claim 3, which is characterized in that information source input channel has 4 It is a, each information source input channel simultaneously or separately incoming digital audio signal and analog audio signal.