CN203167237U - Active sound box with multiple digital signal processors - Google Patents

Abstract

The utility model relates to the loudspeaker technical field, particularly to an active sound box with multiple digital signal processors. The active sound box comprises a signal input module, a digital audio processing module, a power amplifier module, a loudspeaker module and a sound box control module which are arranged successively according to a signal flow direction; the signal input module is used for receiving audio signals which are inputted to a loudspeaker and transmitting the audio signals to the digital audio processing module; the digital audio processing module includes a plurality of sound effect processors which are in series connection; the audio signals processed by the digital audio processing module are amplified by the power amplifier module, and then, are transmitted to the loudspeaker module, and the audio signals are reduced to sound; the digital audio processing module comprises a plurality of DSP processors which are connected with each other in series according to the signal flow direction, wherein an initial DSP processor is connected with the signal input module, and a final DSP processor is connected with the power amplifier module and is integrated with a DAC; and the plurality of sound effect processor are allocated to the plurality of DSP processors according to the signal flow direction.

Description

A kind of active audio amplifier with multi-digital signal processor

Technical field

The utility model relates to loudspeaker techniques, specifically is a kind of active audio amplifier with multi-digital signal processor.

Background technology

There is resource integrated audio amplifier (loud speaker and audio amplifier are represented equivalent in present technique) to refer to the DSP module integrated and the audio amplifier of power amplifier module.For the quick debugging that realizes speaker system is proofreaied and correct, the multilayer audio can be set in the input processing section of DSP module to be handled, for example comprise that audio amplifier layer DSP handles (at audio amplifier self), array layer DSP handles (at one group of audio amplifier) and system layer DSP handles (at whole speaker system), by main control system Synchronization Control or system synchronization control are controlled, organized to the audio amplifier of speaker system separately then, simplify the system debug difficulty, shorten the system debug time.But realize that the processing of multilayer audio need be to having relatively high expectations that DSP handles, general single dsp processor difficulty is realized this multilayer audio processing.

(1) the multilayer audio is handled is that audio that a plurality of same kinds are set is simultaneously handled it and realized, be example with three layers of EQ equilibrium treatment, three sound effect processors such as audio amplifier layer EQ processor, array layer EQ processor and system layer EQ processor need be set in dsp processor simultaneously, and this can greatly increase the data processing amount of dsp processor undoubtedly.And much sound effect processors are all realized (for example EQ equilibrium, frequency division, attenuation of air compensation etc.) by FIR filter or iir filter, and original amount of calculation was just bigger, added to arrange three layers simultaneously.Therefore the dsp processor that performance is general may will can't be realized the processing of multilayer audio smoothly.

(2) for many frequency divisions audio amplifier, the DSP module also need arrange an output processing module at each loudspeaker unit except needs arrange input processing module.The audio signal demultiplexing signal that input processing module is done after total audio is handled and will be handled the audio signal of input audio amplifier arrives each output processing module, and each output processing module is done audio processing targetedly according to corresponding loudspeaker unit characteristic again.And the kind of the sound effect processor that adopts in input processing module and each output processing module can be arbitrarily.Therefore for the frequency division audio amplifier, the data processing amount of DSP processing module and amount of calculation are original just very big.

Therefore the processing capacity that improves the DSP module and be is one of the technical barrier in active loudspeaker field.

In addition, the core devices of DSP module is dsp processor (Digital Signal Processor is also referred to as digital signal processor).Because dsp processor can only processing digital signal, if input audio signal is simulated audio signal, then need earlier by ADC(Analog to Digital Converter analog to digital converter) convert simulated audio signal to digital signal.After digital signal is carried out the signal treatment step of various settings through dsp processor, again by DAC (Digital to Analog Converter, digital to analog converter) converts analog signal transmission to next audio amplifier module, for example power amplifier module, horn module etc. (being formed by one or more independently loudspeaker units).

But because DAC self characteristics, analog signal through DAC conversion output can have a certain amount of background noise, the size of this background noise is almost fixed, and is only relevant with DAC self and import the digital audio and video signals of audio amplifier or the device of integrated this DAC has nothing to do.Though the audience generally is difficult for discovering the existence of this noise under the general case, this noise still exists after all, and power amplifier module can amplify output to this noise together with effective audio signal.When the audio signal volume (level) of input audio amplifier when too small, the noise that restores sound through loudspeaker unit will become obviously, when serious even can influence amplify effect and the whole sound effect of sound system of audio amplifier.

Yet along with the raising of user to the audio processing requirements, the user wishes that the DSP module can provide more audio frequency processing capacity, for example phase response adjustment (BPPA), multilayer processing (audio amplifier layer, array layer, system layer) etc.These functions have exceeded and traditional have made up DSP module by signal disposal ability by single dsp chip, influences real-time and reliability that audio frequency transmits.

Therefore reduce another technical barrier that the DAC background noise is the active loudspeaker field.

The utility model content

The technical problem that the utility model solves provides a kind of active audio amplifier with multi-digital signal processor that has than low noise, and makes its Digital audio process module have stronger disposal ability.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of active audio amplifier with multi-digital signal processor, comprise according to signal and flow to the signal input module that sets gradually, Digital audio process module, power amplifier module, horn module, and for the audio amplifier control module that above-mentioned one or more modules are controlled, described signal input module is used for receiving the audio signal of the described loud speaker of input and transferring to described Digital audio process module, described Digital audio process module comprises the sound effect processor of a plurality of series connection, after described horn module is amplified processing, transfer to described horn module through the audio signal that described Digital audio process module is handled and be reduced into sound, wherein:

Described Digital audio process module comprises a plurality of dsp processors that flow to series connection by signal, an initial dsp processor receives the signal from described signal input module, the signal of a last dsp processor output transfers to described power amplifier module, and described last dsp processor is integrated with DAC, and described a plurality of sound effect processors flow to by signal and are dispensed in described a plurality of dsp processor.

One of improvement of the technical scheme: described loud speaker also comprises noise reduction module, described last dsp processor also comprises first unit for scaling, described audio amplifier control module comprises the noise reduction control module, and the digital signal of handling through described Digital audio process module transfers to described power amplifier module through described first unit for scaling, described DAC and described noise reduction module successively; Described noise reduction control module is for detection of the digital signal level of handling through described Digital audio process module, when detected signal level is lower than pre-set threshold value, control described first unit for scaling by preset multiple amplifying signal level, and control described noise reduction module simultaneously and dwindle signal level by this preset multiple; When detected signal level is higher than threshold values, control described first unit for scaling and described noise reduction module by the output of original signal level size.

Two of improvement of the technical scheme: described Digital audio process module comprises first dsp processor and second dsp processor, and described DAC, described first unit for scaling are arranged in described second dsp processor.

Three of improvement of the technical scheme: described first unit for scaling comprises first switch unit, put-through channel and convergent-divergent passage, described put-through channel and described convergent-divergent passage are connected in parallel in described first switch unit and described DAC, and described convergent-divergent passage is provided with the first level unit for scaling that signal level is amplified for by described preset multiple; Described first switch unit is connected with described noise reduction control module, be used for to receive the digital signal of handling through described Digital audio process module, and select by described put-through channel or described convergent-divergent passage this digital data transmission described DAC extremely according to the control signal of described noise reduction control module.

Four of improvement of the technical scheme: described noise reduction module comprises second switch unit, put-through channel and convergent-divergent passage, described put-through channel and described convergent-divergent passage are connected in parallel in described second switch unit and described power amplifier module, and described convergent-divergent passage is provided with the second level unit for scaling that signal level is dwindled for by described preset multiple; Described second switch unit is connected with described noise reduction control module, be used for to receive the analog signal of described DAC output, and select by described put-through channel or described convergent-divergent passage this analog signal transmission described power amplifier module extremely according to the control signal of described noise reduction control module.

Five of improvement of the technical scheme: described noise reduction control module comprises noise reduction state feedback module, described noise reduction state feedback module be used for when the detected signal level of described noise reduction control module less than pre-set threshold value or when described noise reduction control module is controlled described first switch unit and selected described convergent-divergent channel transfer digital signal, control the status lamp demonstration volume that arranges on the described loud speaker and cross mere suggestion and/or this state information is fed back to the main control system that connects with described loud speaker, thus too small to user prompt input volume.

Six of improvement of the technical scheme: described Digital audio process module comprises input processing module and a plurality of output processing module; Described input processing module comprises a plurality of sound effect processors of series connection, each sound effect processor is used for according to the processing parameter that sets audio signal being carried out corresponding kind signal processing operations, wherein an initial sound effect processor receives the audio signal from described signal input module, and the audio signal demultiplexing output audio signal after a last sound effect processor is handled also is transferred to a corresponding described output processing module; Each described output processing module comprises a plurality of sound effect processors of series connection, and an initial sound effect processor is filter, this filter is used for receiving the road output audio signal corresponding with described output processing module, and this one road output audio signal is carried out filtering handle, thereby obtain the audio signal of default frequency range, the audio signal transmission after a last sound effect processor is handled is to described first unit for scaling.

Seven of improvement of the technical scheme: each sound effect processor of described input processing module is arranged in described first dsp processor, and each sound effect processor of each described output processing module is arranged in described second dsp processor.

Eight of improvement of the technical scheme: each sound effect processor of described input processing module and the filter of each described output processing module are arranged in described first dsp processor, and all the other sound effect processors of each described output processing module are arranged in described second dsp processor.

Compared with prior art, the beneficial effect of technical scheme that the utility model adopts is as follows: because Digital audio process module adopts many DSP framework, each sound effect processor that Digital audio process module need be able to be realized, for example delayer, silencer, phase response adjuster, multilayer EQ equalizer etc. are dispensed to each sound effect processor, improve the disposed of in its entirety ability of Digital audio process module thus, for the user provides more reliable, audio processing response fast.

In addition, the improvement project of present technique is also given the digital signal level size of DAC by noise reduction control module detected transmission, when detecting signal level when too small, the digital signal level that will be transferred to DAC at the DAC front end amplifies certain multiple, and will change the analog signal level of exporting through DAC in the rear end of DAC and dwindle with former amplification multiple, this moment, the level of useful signal returned to original level, and the background noise of DAC reduced several times, thereby reach the purpose of noise reduction.

Description of drawings

Fig. 1 is the overall structure schematic diagram of embodiment.

Fig. 2 is the overall structure schematic diagram (be example with two dsp processors) of embodiment.

Fig. 3 is one of embodiment DAC principle of noise reduction schematic diagram.

Fig. 4 is two of embodiment DAC principle of noise reduction schematic diagram.

Fig. 5 is the noise reduction control module schematic diagram of embodiment.

Fig. 6 is the overall structure figure of embodiment.

Fig. 7 is the signal input module schematic diagram of embodiment.

Fig. 8 is the analog signal compression amplitude limiter schematic diagram of embodiment.

Fig. 9 is the compression amplitude limit unit schematic diagram of embodiment.

Figure 10 is the Digital audio process module sound effect processor distribution map (being provided with 2 EQ equalizers with the input processing is example) of embodiment.

Figure 11 is the Digital audio process module sound effect processor distribution map (being provided with 3 EQ equalizers with the input processing is example) of embodiment.

Figure 12 is one of sound effect processor distribution mode of comprising of the Digital audio process module of embodiment (be example with two dsp processors).

Figure 13 is two (be example with two dsp processors) of the sound effect processor distribution mode that comprises of the Digital audio process module of embodiment.

Embodiment

In the utility model, term " on ", D score, " left side ", " right side ", " preceding ", " back ", " top ", " end ", " interior ", " outward ", " in ", close the orientation of indications such as " vertically ", " level ", " laterally ", " vertically " or position is based on orientation shown in the drawings or position relation.These terms mainly are in order to describe the utility model and embodiment better, to be not must have particular orientation for limiting indicated device, element or part, or to construct and operate with particular orientation.

And above-mentioned part term also may be used for other implications of expression except can being used for expression orientation or position relation, for example term " on " also may be used for certain relations of dependence of expression or annexation in some cases.For those of ordinary skills, can understand the concrete implication of these terms in the utility model as the case may be.

In addition, term " installation ", " setting ", " being provided with ", " connection ", " linking to each other " should be done broad understanding.For example, can be fixedly connected, removably connect, or monolithic construction; Can be mechanical connection, or be electrically connected; Can be directly to link to each other, or link to each other indirectly by intermediary, or be connection inner between two devices, element or the parts.For those of ordinary skills, can understand the concrete implication of above-mentioned term in the utility model as the case may be.

In addition, term " first ", " second " etc. mainly are for distinguishing different device, element or part (concrete kind is identical with the structure possibility also may be different), are not be used to the relative importance and the quantity that show or hint indicated device, element or part.Except as otherwise noted, the implication of " a plurality of " is two or more.

Below in conjunction with embodiment and accompanying drawing the technical solution of the utility model is further described.

As shown in Figure 1, the active audio amplifier with multi-digital signal processor of present embodiment comprises signal input module 10, Digital audio process module 20, power amplifier module 30, the horn module 40 that sets gradually according to the signal flow direction, and for the audio amplifier control module 90 that above-mentioned one or more modules are controlled, described signal input module is used for receiving the audio signal of the described loud speaker of input and transferring to described Digital audio process module.If the input audio amplifier is simulated audio signal, need convert digital signal to by ADC, ADC can be arranged to individual devices, or is arranged in the described signal input module, or is integrated into described Digital audio process module.After described horn module is amplified processing, transfer to described horn module through the audio signal that described Digital audio process module is handled and be reduced into sound.

Described Digital audio process module comprises a plurality of series connection sound effect processors.The described Digital audio process module that present embodiment adopts comprises a plurality of dsp processors that flow to series connection by signal, an initial dsp processor is connected with described signal input module, a last dsp processor (directly or indirectly) is connected with described power amplifier module, and described last dsp processor is integrated with DAC, and described a plurality of sound effect processors flow to by signal and are dispensed in described a plurality of dsp processor.

In fact Digital audio process module of the present utility model also can adopt the dsp processor more than three or three, but adopts two dsp processors to set forth explanation with Digital audio process module for convenience.

Shown in Fig. 2 to 3, described audio amplifier also comprises noise reduction module 52 ', described Digital audio process module then comprises first dsp processor 21 and second dsp processor 22, and described second dsp processor 22 is provided with DAC 229 and first unit for scaling 228, described audio amplifier control module 90 comprises noise reduction control module 95, and the digital signal of handling through described Digital audio process module 20 transfers to described power amplifier module 30 through described first unit for scaling 228, described DAC 229 and described noise reduction module 52 ' successively.

Described noise reduction control module 95 is for detection of the digital signal level of handling through described Digital audio process module 20, when detected signal level is lower than pre-set threshold value, control described first unit for scaling 228 by preset multiple amplifying signal level, and control described noise reduction module 52 ' simultaneously and dwindle signal level by this preset multiple; When detected signal level is higher than threshold values, controls described first unit for scaling 228 and described noise reduction module 52 ' and press the output of original signal level size.If handle the signal of back output through described Digital audio process module multichannel is arranged, can at the front end of DAC first unit for scaling be set at every road signal, the rear end arranges noise reduction module, and by the noise reduction control module every road signal is carried out noise reduction and control, namely the level that detects signal output of this road when the noise reduction control module is crossed when low, control first unit for scaling and noise reduction module on this road signalling channel simultaneously and carry out the reverse convergent-divergent (the former amplifies, and the latter dwindles) of identical multiple.

That is to say, when the signal level of input audio amplifier is too small, noise reduction control module 95 starts the noise reduction adjustment, control first unit for scaling 228 and noise reduction module 52 ' with identical multiple synchronous backward convergent-divergent level, suppose that first unit for scaling 228 has amplified 10 times with signal level, then noise reduction module 52 ' then can correspondingly be dwindled signal level 10 times.When incoming signal level in tolerance interval, background noise is outstanding or when not influencing the audio amplifier sound field effect, noise reduction control module 95 control first unit for scaling 228 and noise reduction module 52 ' are kept original signal level size, do not change the level of signal.If signal level equals threshold values just, both can be set at the adjustment of enabling signal noise reduction, can be set at also not that the enabling signal level is adjusted and by former level output.

As shown in Figure 5, described noise reduction control module 95 comprises: signal level detection module 2271, for detection of the digital signal level of Digital audio process module 20 processing; Noise reduction Executive Module 2272, be used for judging that described signal level detection module 2271 detects level and whether is lower than pre-set threshold value, if being lower than threshold values then controls described first unit for scaling 228 by preset multiple amplifying signal level, and control described noise reduction module 52 ' simultaneously and dwindle signal level by this preset multiple; Threshold values is then controlled described first unit for scaling 228 and described noise reduction module 52 ' is pressed the output of original signal level size if be higher than.

As shown in Figure 4, described first unit for scaling 228 comprises first switch unit 2281, put-through channel and convergent-divergent passage, described put-through channel and described convergent-divergent passage are connected in parallel in described first switch unit 2281 and described DAC 229, and described convergent-divergent passage is provided with the first level unit for scaling 2282 that signal level is amplified for by described preset multiple, and the signal level of transmitting through put-through channel does not change.

Described first switch unit 2281 is connected with described noise reduction control module 95, be used for to receive the digital signal of handling through described Digital audio process module 20, and select by described put-through channel or described convergent-divergent passage this digital data transmission described DAC 229 extremely according to the control signal of described noise reduction control module 95.When noise reduction control module 95 detected signal levels are higher than pre-set threshold value, will send the control signal of selecting the put-through channel transmission of digital signals to first switch unit 2281, the signal level of output is constant; When noise reduction control module 95 detected signal levels are lower than pre-set threshold value, to send the control signal of selecting convergent-divergent channel transfer digital signal to first switch unit 2281, signal carries out according to preset multiple exporting after level amplifies processing through the first level unit for scaling 2282.

As shown in Figure 4, described noise reduction module 52 ' comprises second switch unit, 521 ' put-through channel (not label) and convergent-divergent passage (not label), described put-through channel and described convergent-divergent passage are connected in parallel in described second switch unit 521 ' and the described power amplifier module 30, described convergent-divergent passage is provided with the second level unit for scaling 522 ' that signal level is dwindled for by described preset multiple, and the signal level of transmitting through put-through channel does not change.

Described second switch unit 521 ' is connected with described noise reduction control module 95, be used for to receive the analog signal of described DAC 229 outputs, and select by described put-through channel or described convergent-divergent passage this analog signal transmission described power amplifier module 30 extremely according to the control signal of described noise reduction control module 95.When noise reduction control module 95 detected signal levels are higher than pre-set threshold value, will send the control signal of selecting the put-through channel transmission of analogue signal to second switch unit 521 ', the signal level of output is constant; When noise reduction control module 95 detected signal levels are lower than pre-set threshold value, to send the control signal of selecting convergent-divergent channel transfer analog signal to second switch unit 521 ', analog signal carries out according to preset multiple exporting after level dwindles processing through the second level unit for scaling 522 '.The second level unit for scaling 522 ' can adopt conventional discharge circuit or resistor voltage divider circuit to realize, when especially adopting resistor voltage divider circuit, for the level that makes the output of the second level unit for scaling 522 ' and impedance are complementary with follow-up power amplifier module 30 better, can set up buffer cell at the second level unit for scaling, 522 ' output, after analog signal that the second level unit for scaling 522 ' dwindles output is through the buffer cell adjustment, be transferred to power amplifier module 30 again.

As Fig. 5, shown in Figure 6, described noise reduction control module 95 comprises noise reduction state feedback module 951.Described noise reduction state feedback module 951 be used for when described noise reduction control module 95 detected signal levels less than pre-set threshold value or when described noise reduction control module 95 is controlled the described convergent-divergent channel transfer digital signal of described first switch unit 2281 selections, control the status lamp that arranges on the described audio amplifier 61 show volumes cross mere suggestion (showing as flicker or literal) and/or with this state information feed back to as described in the main control system (or being called the control platform) that connects of audio amplifier, thereby too small to user prompt input volume.

As Fig. 6, shown in Figure 7, described signal input module 10 comprises for the analog input interface 11 that receives simulated audio signal, be used for receiving the AES input interface 12 of AES digital audio and video signals, the RJ45 input interface 13 that is used for the digital audio and video signals (digital audio and video signals of AES or extended formatting) of reception network transmission, analog signal compression amplitude limiter 15(is also referred to as compressor), digital audio transmitter 16(Digital Audio Transmitter), wherein, described analog input interface 11 is connected with described Digital audio process module 20 by described analog signal compression amplitude limiter 15, described AES input interface 12, RJ45 input interface 13 is connected with described Digital audio process module 20 by described digital audio transmitter 16 respectively, and described audio amplifier control module 90 is connected with described RJ45 input interface 13.

Described audio amplifier control module 90 is connected with the external control main frame by described RJ45 input interface 13, make main control system control audio amplifier control module 90, audio amplifier control module 90 is controlled each controlled module or the unit of audio amplifier according to the control signal of main control system again, as the setting of the various audio processing parameters of the DSP of digital audio processing modules 20, the setting of power amplifier parameter, signal input module 10 input channel Route Selection etc., to realize the Remote management of audio amplifier.Audio amplifier control module 90 can also as noise reduction state, compression amplitude limit state, power amplifier state, temperature, radiator fan 64 rotating speeds etc., feed back to the control main control system, to realize that the audio amplifier of dispersed placement is concentrated monitoring with the audio amplifier state information simultaneously.Digital audio and video signals through AES input interface, RJ45 input interface 13 input audio amplifiers converts the form that can directly directly handle for dsp processor to by the digital audio transmitter.The simulated audio signal of input audio amplifier need convert digital signal to by ADC, and ADC can be arranged in the signal input module 10, as is arranged on the rear end of analog compression amplitude limit, also can be integrated in the Digital audio process module 20.In addition, signal input module 10 can also be set up RJ45 output interface 14, in order to carry out cascade between the audio amplifier, makes things convenient for user flexibility to build audio amplifier and connects network.Consider that the built-in power amplifier module 30 of active audio amplifier needs heat radiation, audio amplifier inside generally is provided with radiator fan 64 and for detection of the temperature sensor of power amplifier and/or audio amplifier internal temperature, in order to give main control system with feedback information such as state of temperature and radiator fan 64 rotating speeds, audio amplifier control module 90 can directly be connected with temperature sensor, radiator fan 64 obtains data, or obtains radiator fan 64 rotary speed informations by devices such as Mega8 62 indirectly.

As Fig. 2, Fig. 6 and shown in Figure 7, described audio amplifier control module 90 also comprises first control module 91 for the described signal input module 10 of control, the described first control module 91(is connected with described digital audio transmitter with described analog signal compression amplitude limiter) comprise and compress amplitude limit state feedback module (not shown), described compression amplitude limit state feedback module is used for when described analog signal compression amplitude limiter starts compression or amplitude limit function, control the status lamp that arranges on the described audio amplifier 61 show volumes cross mere suggestion (showing as flicker or literal) and/or with this state information feed back to as described in the main control system that connects of audio amplifier, thereby excessive to user prompt input volume.

As Fig. 8, shown in Figure 9, described analog signal compression amplitude limiter comprises that flowing to the prime balance that connects successively by signal changes non-equilibrium input unit 151, compression amplitude limit unit 152 and non-equilibrium commentaries on classics balance output unit 153, described compression amplitude limit unit 152 comprises: be connected in the anti-phase computing amplification module that described prime balance is changeed non-equilibrium input unit 152 and described non-equilibrium commentaries on classics balance output unit 153, and press signal and flow to the active half-wave rectification block that connects successively, the logarithm operation amplification module, the difference amplification module, the anti-phase computing buffer module of equal proportion and switch adjustment pipe, wherein said active half-wave rectification block is connected with described anti-phase computing amplification module output, the anti-phase computing buffer module of described equal proportion is connected with described anti-phase computing amplification module, described switch adjustment pipe is connected with described anti-phase computing amplification module, in addition, described non-equilibrium commentaries on classics balance output unit carries out non-equilibrium commentaries on classics balance and anti-phase processing to the received signal.

Shown in Figure 10,11, described Digital audio process module 20 comprises input processing module and a plurality of output processing module.

Described input processing module comprises a plurality of sound effect processors of series connection, each sound effect processor is used for according to the processing parameter that sets audio signal being carried out corresponding kind signal processing operations, wherein an initial sound effect processor receives the audio signal from described signal input module 10, and the audio signal demultiplexing output audio signal after a last sound effect processor is handled also is transferred to a corresponding described output processing module;

Each described output processing module comprises a plurality of sound effect processors of series connection, and an initial sound effect processor is filter, this filter is used for receiving the road output audio signal corresponding with described output processing module, and this one road output audio signal is carried out filtering handle, thereby obtain the audio signal of default frequency range, the audio signal transmission after a last sound effect processor is handled is to described first unit for scaling 228.

For realizing the multilayer adjustable function, described input processing module comprises one or more sound effect processors, and have at least the described input processing module of a kind of sound effect processor to include the sound effect processor of at least two these kinds, one of them is the audio amplifier layer sound effect processor of setting at audio amplifier self, also have one to be at the unified array layer sound effect processor of setting of each audio amplifier member of array group under the audio amplifier, each array group comprises a plurality of audio amplifiers, and the parameter of array layer sound effect processor of correspondence of audio amplifier that belongs to same array group is identical.In addition, can also be provided with the system layer sound effect processor that belongs to this kind sound effect processor type for the described input processing module of any sound effect processor, the system layer sound effect processor is at the unified set of systems layer sound effect processor of setting of each audio amplifier member of set of systems under the described audio amplifier.Each set of systems comprises one or more audio amplifiers, and/or comprises one or more array group, and the parameter of system layer sound effect processor of correspondence of audio amplifier that belongs to same set of systems is identical.General an of speaker system need arrange a set of systems and get final product.Each sound effect processor series connection that described input processing module comprises.

Be that example comprises two or three these kind sound effect processors to input processing module and describes with the EQ equilibrium.

(1) two EQ equilibrium.As shown in figure 10, input processing module comprises two EQ equalizers, one is audio amplifier layer EQ equalizer, another is array layer EQ equalizer, this audio amplifier layer EQ equalizer is used for according at whose fixed EQ processing parameter of described audio amplifier self audio signal being carried out the EQ equilibrium treatment, and this array layer EQ equalizer is used for according at the unified EQ processing parameter of setting of each audio amplifier member of the described array group of affiliated audio amplifier audio signal being carried out the EQ equilibrium treatment.

(2) three EQ equilibriums.As shown in figure 11, input processing module comprises three EQ equalizers, one is audio amplifier layer EQ equalizer, one is array layer EQ equalizer, also having one is system layer EQ equalizer, this audio amplifier layer EQ equalizer is used for according at whose fixed EQ processing parameter of described audio amplifier self audio signal being carried out the EQ equilibrium treatment, this array layer EQ equalizer is used for according to the EQ processing parameter that each audio amplifier member at the described array group of affiliated audio amplifier unifies to set audio signal being carried out the EQ equilibrium treatment, and this system layer EQ equalizer is used for according to the EQ processing parameter that each audio amplifier member at set of systems under the described audio amplifier unifies to set audio signal being carried out the EQ equilibrium treatment.Input processing module in the accompanying drawing 11 comprises input silencer, input gain device, input time delay device, input polarity controller, input air attenuation equalizer, audio amplifier layer EQ equalizer, array layer EQ equalizer and the system layer EQ equalizer of series connection successively.

Each described input processing module comprises one or more following sound effect processors: input silencer, input gain device, input time delay device, input polarity controller, input air attenuation equalizer, EQ equalizer, input compression amplitude limiter, and wherein: this input silencer is used for that audio signal is carried out silence switch to be handled; This input gain device is handled for audio that audio signal is gained; This input time delay device is used for audio signal is carried out delay process; This input polarity controller is used for audio signal is carried out Polarity Control; This input air attenuation equalizer is used for audio signal is carried out the attenuation of air compensation deals; This input EQ equalizer is used for that audio signal is carried out the balanced audio of EQ to be handled; This input compression amplitude limiter is used for audio signal is compressed amplitude limiting processing.

Each described output processing module comprises filter and one or more following sound effect processors: output silencer, output gain device, output delayer, output polarity controller, delivery air attenuation equalizer, output EQ equalizer, output compression amplitude limiter, wherein:

This filter be used for to receive corresponding one road output audio signal of this described output processing module, and this one road output audio signal is carried out the filtering processing, thus obtain with this described output processing module the sound frequency range that is complementary of corresponding power amplifier unit;

This input silencer is used for that the road output audio signal that this described output processing module receives is carried out silence switch to be handled;

This input gain device is used for the road output audio signal that this described output processing module the receives audio that gains is handled;

The road output audio signal that this input time delay device is used for this described output processing module is received carries out delay process;

The road output audio signal that this input polarity controller is used for this described output processing module is received carries out Polarity Control;

The road output audio signal that this input air attenuation equalizer is used for this described output processing module is received carries out the attenuation of air compensation deals;

These input and output EQ equalizer is used for that the road output audio signal that this described output processing module receives is carried out the balanced audio of EQ to be handled;

The road output audio signal that this input compression amplitude limiter is used for this described output processing module is received compresses amplitude limiting processing; Each audio processing module series connection of described output processing module comes a last sound effect processor and is connected with described power amplifier module 30.After output audio signal is handled through last sound effect processor of output processing module, this output audio signal directly or indirectly transfers to corresponding in the power amplifier module 30 power amplifier unit, output audio signal transfers to loudspeaker unit corresponding in the horn module 40 again after power amplifier unit amplifies processing, be reduced into sound finally by loudspeaker unit.

As previously mentioned, the sound effect processor that comprises of described Digital audio process module (sound effect processor that comprises input processing module and each output processing module) flows to by signal and is dispensed in described a plurality of dsp processor.In an embodiment, can take dual mode to distribute these sound effect processors.

(1) first kind of mode as shown in figure 12, each sound effect processor of described input processing module is arranged in described first dsp processor 21, each sound effect processor of each described output processing module is arranged in described second dsp processor 22.

(2) second way as shown in figure 13, each sound effect processor of described input processing module and the filter of each described output processing module are arranged in described first dsp processor 21, and all the other sound effect processors of each described output processing module are arranged in described second dsp processor 22.

In addition, described first dsp processor 21 initial as described Digital audio process module also comprises the signal routing module, and be used for reception from analog signal input channel and the digital signal input channel of described signal input module 10 signals, described analog signal input channel, described digital signal input channel is connected with described signal routing module respectively, and also be provided with on the described digital signal input channel for digital signal sampling rate is mated the sampling rate converter of conversion, the road input signal that described signal routing module will be selected transfers to the described initial sound effect processor in the described input processing module.

In addition, described audio amplifier control module 90 also comprises second control module 92 for described first dsp processor 21 of control, the 4th control module 94 that is used for controlling the 3rd control module 93 of described second dsp processor 22 and is used for the described power amplifier module 30 of control.Described second control module 92 is set the parameter of each sound effect processor in described first dsp processor 21 according to the control signal of the main control system that is connected with audio amplifier or is upgraded, and perhaps according to the instruction of main control system the parameter of sound effect processor in described first dsp processor 21 is fed back to main control system.Described the 3rd control module 93 is set the parameter of each sound effect processor in described second dsp processor 22 according to the control signal of the main control system that is connected with audio amplifier or is upgraded, and perhaps according to the instruction of main control system the parameter of sound effect processor in described second dsp processor 22 is fed back to main control system.

Claims (11)

1. active audio amplifier with multi-digital signal processor, comprise according to signal and flow to the signal input module that sets gradually, Digital audio process module, power amplifier module, horn module, and for the audio amplifier control module that above-mentioned one or more modules are controlled, described signal input module is used for receiving the audio signal of the described loud speaker of input and transferring to described Digital audio process module, described Digital audio process module comprises the sound effect processor of a plurality of series connection, after described horn module is amplified processing, transfer to described horn module through the audio signal that described Digital audio process module is handled and be reduced into sound, it is characterized in that:

Described Digital audio process module comprises a plurality of dsp processors that flow to series connection by signal, an initial dsp processor receives the signal from described signal input module, the signal of a last dsp processor output transfers to described power amplifier module, and described last dsp processor is integrated with DAC, and described a plurality of sound effect processors flow to by signal and are dispensed in described a plurality of dsp processor.

2. a kind of active audio amplifier with multi-digital signal processor according to claim 1, it is characterized in that: described loud speaker also comprises noise reduction module, described last dsp processor also comprises first unit for scaling, described audio amplifier control module comprises the noise reduction control module, and the digital signal of handling through described Digital audio process module transfers to described power amplifier module through described first unit for scaling, described DAC and described noise reduction module successively;

Described noise reduction control module is for detection of the digital signal level of handling through described Digital audio process module, when detected signal level is lower than pre-set threshold value, control described first unit for scaling by preset multiple amplifying signal level, and control described noise reduction module simultaneously and dwindle signal level by this preset multiple; When detected signal level is higher than threshold values, control described first unit for scaling and described noise reduction module by the output of original signal level size.

3. a kind of active audio amplifier with multi-digital signal processor according to claim 2, it is characterized in that: described Digital audio process module comprises first dsp processor and second dsp processor, and described DAC, described first unit for scaling are arranged in described second dsp processor.

4. according to claim 2 or 3 described a kind of active audio amplifiers with multi-digital signal processor, it is characterized in that: described first unit for scaling comprises first switch unit, put-through channel and convergent-divergent passage, described put-through channel and described convergent-divergent passage are connected in parallel in described first switch unit and described DAC, and described convergent-divergent passage is provided with the first level unit for scaling that signal level is amplified for by described preset multiple;

Described first switch unit is connected with described noise reduction control module, be used for to receive the digital signal of handling through described Digital audio process module, and select by described put-through channel or described convergent-divergent passage this digital data transmission described DAC extremely according to the control signal of described noise reduction control module.

5. according to claim 2 or 3 described a kind of active audio amplifiers with multi-digital signal processor, it is characterized in that: described first unit for scaling comprises first switch unit, put-through channel and convergent-divergent passage, described put-through channel and the parallel connection of described convergent-divergent passage, and described convergent-divergent passage is provided with the first level unit for scaling that signal level is amplified for by described preset multiple;

Described first switch unit be used for to receive the digital signal of handling through described Digital audio process module, and selects by described put-through channel or described convergent-divergent passage this digital data transmission described DAC extremely according to the control signal of described noise reduction control module.

6. according to claim 2 or 3 described a kind of active audio amplifiers with multi-digital signal processor, it is characterized in that:

Described noise reduction module comprises second switch unit, put-through channel and convergent-divergent passage, described put-through channel and described convergent-divergent passage are connected in parallel in described second switch unit and described power amplifier module, and described convergent-divergent passage is provided with the second level unit for scaling that signal level is dwindled for by described preset multiple;

Described second switch unit is connected with described noise reduction control module, be used for to receive the analog signal of described DAC output, and select by described put-through channel or described convergent-divergent passage this analog signal transmission described power amplifier module extremely according to the control signal of described noise reduction control module.

7. according to claim 2 or 3 described a kind of active audio amplifiers with multi-digital signal processor, it is characterized in that:

Described noise reduction module comprises second switch unit, put-through channel and convergent-divergent passage, described put-through channel and the parallel connection of described convergent-divergent passage, and described convergent-divergent passage is provided with the second level unit for scaling that signal level is dwindled for by described preset multiple;

Described second switch unit be used for to receive the analog signal of described DAC output, and selects by described put-through channel or described convergent-divergent passage this analog signal transmission described power amplifier module extremely according to the control signal of described noise reduction control module.

8. according to claim 2 or 3 described a kind of active audio amplifiers with multi-digital signal processor, it is characterized in that: described noise reduction control module comprises noise reduction state feedback module, described noise reduction state feedback module be used for when the detected signal level of described noise reduction control module less than pre-set threshold value or when described noise reduction control module is controlled described first switch unit and selected described convergent-divergent channel transfer digital signal, control the status lamp demonstration volume that arranges on the described loud speaker and cross mere suggestion and/or this state information is fed back to the main control system that connects with described loud speaker, thus too small to user prompt input volume.

9. according to each described a kind of active audio amplifier with multi-digital signal processor of claim 1 to 3, it is characterized in that: described Digital audio process module comprises input processing module and a plurality of output processing module;

Described input processing module comprises a plurality of sound effect processors of series connection, each sound effect processor is used for according to the processing parameter that sets audio signal being carried out corresponding kind signal processing operations, wherein an initial sound effect processor receives the audio signal from described signal input module, and the audio signal demultiplexing output audio signal after a last sound effect processor is handled also is transferred to a corresponding described output processing module;

Each described output processing module comprises a plurality of sound effect processors of series connection, and an initial sound effect processor is filter, this filter is used for receiving the road output audio signal corresponding with described output processing module, and this one road output audio signal is carried out filtering handle, thereby obtain the audio signal of default frequency range, the audio signal transmission after a last sound effect processor is handled is to described first unit for scaling.

10. a kind of active audio amplifier with multi-digital signal processor according to claim 9, it is characterized in that: each sound effect processor of described input processing module is arranged in described first dsp processor, and each sound effect processor of each described output processing module is arranged in described second dsp processor.

11. a kind of active audio amplifier with multi-digital signal processor according to claim 9, it is characterized in that: each sound effect processor of described input processing module and the filter of each described output processing module are arranged in described first dsp processor, and all the other sound effect processors of each described output processing module are arranged in described second dsp processor.

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