CN203136140U - High quality active integrated sound box - Google Patents
High quality active integrated sound box Download PDFInfo
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- CN203136140U CN203136140U CN 201220750504 CN201220750504U CN203136140U CN 203136140 U CN203136140 U CN 203136140U CN 201220750504 CN201220750504 CN 201220750504 CN 201220750504 U CN201220750504 U CN 201220750504U CN 203136140 U CN203136140 U CN 203136140U
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Abstract
The utility model relates to a sound box technology, and especially relates to a high quality active integrated sound box. The high quality active integrated sound box comprises a signal input module, a digital audio processing module, a power amplifier module, a horn module and a noise reduction module which are arranged orderly according to the flow direction of a signal, and also comprises a sound box control module used for controlling the above one or more modules, The digital audio processing module is integrated with a digital-to-analog converter (DAC), and also comprises a first zooming unit and a noise reduction control module. The noise reduction control module is used to detect a digital signal level processed by the digital audio processing module, when the detected signal level is less than a preset threshold value, control the first zooming unit to amplify the signal level according to a preset times, and simultaneously control the noise reduction module to shrink the signal level according to a preset times, and when the detected signal level is greater than the threshold value, control the first zooming unit and the noise reduction module to output according to an original signal level, thereby reducing the noise output of the sound box and improving the sound effect and quality.
Description
Technical field
The utility model relates to the audio amplifier technology, specifically is the integrated audio amplifier of a kind of high-quality active.
Background technology
There is resource integrated audio amplifier generally to refer to Digital audio process module integrated and the audio amplifier of power amplifier module.Wherein, Digital audio process module is used for that the audio signal of input audio amplifier is carried out various audios and handles, for example quiet, time-delay, EQ equilibrium, gain, Polarity Control etc., the core devices of this 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).
Yet 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.
Therefore the background noise that reduces DAC output is for design and make high-fidelity, the integrated audio amplifier of high-quality active is an important technological problems.
The utility model content
The technical problem that the utility model solves provides a kind ofly to be had than the integrated audio amplifier of the high-quality active of low noise.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
The integrated audio amplifier of a kind of high-quality active, comprise according to signal and flow to signal input module, Digital audio process module, power amplifier module, the horn module that sets gradually, and for the audio amplifier control module that above-mentioned one or more modules are controlled, described Digital audio process module is integrated with DAC, the digital signal of handling through described Digital audio process module exports described power amplifier module to after described DAC converts analog signal to, wherein:
Described audio amplifier also comprises noise reduction module, described Digital audio process module also comprises first unit for scaling and 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.
One of improvement of the technical scheme: described noise reduction control module comprises: the signal level detection module, for detection of the digital signal level of Digital audio process module processing; The noise reduction Executive Module, be used for judging that described signal level detection module detects level and whether is lower than pre-set threshold value, if being lower than threshold values then controls 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; Threshold values is then controlled described first unit for scaling and described noise reduction module is exported by original signal level size if be higher than.
Two 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.
Three 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.
Four of improvement of the technical scheme: described audio amplifier control module comprises second control module for the described Digital audio process module of control, described second 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 audio amplifier and cross mere suggestion and/or this state information is fed back to the main control system that connects with described audio amplifier, thus too small to user prompt input volume.
Five of improvement of the technical scheme: described signal input module comprises for the analog input interface that receives simulated audio signal, be used for receiving the AES input interface of AES digital audio and video signals, the RJ45 input interface that is used for the digital audio and video signals of reception network transmission, analog signal compression amplitude limiter, the digital audio transmitter, wherein, described analog input interface is connected with described Digital audio process module by described analog signal compression amplitude limiter, described AES input interface, the RJ45 input interface is connected with described Digital audio process module by described digital audio transmitter respectively, and described audio amplifier control module is connected with described RJ45 input interface.
Six of improvement of the technical scheme: described audio amplifier control module also comprises first control module for the described signal input module of control, described first control module comprises compression amplitude limit state feedback module, 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 demonstration volume that arranges on the described audio amplifier and cross mere suggestion and/or this state information is fed back to the main control system that connects with described audio amplifier, thus excessive to user prompt input volume.
Seven of improvement of the technical scheme: described analog signal compression amplitude limiter comprises that flowing to the prime balance that connects successively by signal changes non-equilibrium input unit, compression amplitude limit unit and non-equilibrium commentaries on classics balance output unit, described compression amplitude limit unit comprises: be connected in the anti-phase computing amplification module that described prime balance is changeed non-equilibrium input unit and described non-equilibrium commentaries on classics balance output unit, 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.
Eight 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.
Nine of improvement of the technical scheme: 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.
Compared with prior art, the beneficial effect of technical scheme that the utility model adopts is as follows: present technique is 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, reach the purpose of noise reduction thus.
Description of drawings
Fig. 1 is the overall structure schematic diagram of embodiment.
Fig. 2 is the DAC principle of noise reduction figure of embodiment.
Fig. 3 is the concrete schematic diagram of DAC noise reduction of embodiment.
Fig. 4 is the noise reduction control module schematic diagram of embodiment.
Fig. 5 is the overall structure figure of embodiment.
Fig. 6 is the audio amplifier control module schematic diagram of embodiment.
Fig. 7 is the noise reduction state feedback module principle figure of embodiment.
Fig. 8 is the signal input module structure chart of embodiment.
Fig. 9 is the analog signal compression amplitude limiter schematic diagram of embodiment.
Figure 10 is the compression amplitude limit unit schematic diagram of embodiment.
Figure 11 is the sound effect processor schematic diagram (comprising three EQ equalizers) that the Digital audio process module of embodiment comprises.
Figure 12 is the sound effect processor schematic diagram (comprising two EQ equalizers) that the Digital audio process module of embodiment comprises.
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.
Shown in Fig. 1 to 4, the integrated audio amplifier of the high-quality active of present embodiment comprises the signal input module 10 that sets gradually according to the signal flow direction, Digital audio process module 20, power amplifier module 30, horn module 40, and for the audio amplifier control module 90 that above-mentioned one or more modules are controlled, described Digital audio process module 20 is integrated with DAC 29, (various audios processing through described Digital audio process module 20 processing, as time-delay, EQ equilibriums etc.) digital signal is exported (can directly or indirectly export) to described power amplifier module 30 after described DAC 29 converts analog signal to, and this analog signal is reduced into sound by described horn module 40 after described power amplifier module 30 amplifies processing.
Described audio amplifier also comprises noise reduction module 52 ', described Digital audio process module 20 also comprises first unit for scaling 28 and noise reduction control module 27, 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 28, described DAC 29 and described noise reduction module 52 ' successively.
Described noise reduction control module 27 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 28 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 28 and described noise reduction module 52 ' and press the output of original signal level size.
That is to say, when the signal level of input audio amplifier is too small, noise reduction control module 27 starts the noise reduction adjustment, control the identical multiple synchronous backward convergent-divergent level of first unit for scaling 28 and noise reduction module 52 ', suppose that first unit for scaling 28 has amplified 10 times with signal level, then noise reduction module 52 ' then can correspondingly be dwindled signal 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 27 control first unit for scaling 28 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.
Described noise reduction control module 27 comprises: signal level detection module 271, for detection of the digital signal level of Digital audio process module 20 processing; Noise reduction Executive Module 272, be used for judging that described signal level detection module 271 detects level and whether is lower than pre-set threshold value, if being lower than threshold values then controls described first unit for scaling 28 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 28 and described noise reduction module 52 ' is pressed the output of original signal level size if be higher than.
Described first unit for scaling 28 comprises first switch unit 281, 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 281 and described DAC 29, and described convergent-divergent passage is provided with the first level unit for scaling 282 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 281 is connected with described noise reduction control module 27, 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 29 extremely according to the control signal of described noise reduction control module 27.When noise reduction control module 27 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 281, the signal level of output is constant; When noise reduction control module 27 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 281, signal carries out according to preset multiple exporting after level amplifies processing through the first level unit for scaling 282.
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 27, be used for to receive the analog signal of described DAC 29 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 27.When noise reduction control module 27 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 27 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 shown in Figs. 5 to 7, described audio amplifier control module 90 comprises second control module 92 for the described Digital audio process module 20 of control, described second control module 92 comprises noise reduction state feedback module 921, described noise reduction state feedback module 921 be used for when described noise reduction control module 27 detected signal levels less than pre-set threshold value or when described noise reduction control module 27 is controlled the described convergent-divergent channel transfer digital signal of described first switch unit 281 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 shown in Figure 8, 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 shown in Figure 8, 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. 9, shown in Figure 10, 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.
As shown in figure 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 28.
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 12, 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.
Described Digital audio process module 20 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.
Described audio amplifier control module 90 comprises for second control module 92 of the described Digital audio process module 20 of control with for the 4th control module 94 of controlling described power amplifier module 30.Second control module 92 is set each sound effect processor parameter of Digital audio process module 20 according to the control signal of the main control system that is connected with audio amplifier or is upgraded, and the parameter of Digital audio process module 20 each sound effect processors can also be fed back to main control system simultaneously.
Claims (10)
1. integrated audio amplifier of high-quality active, comprise according to signal and flow to signal input module, Digital audio process module, power amplifier module, the horn module that sets gradually, and for the audio amplifier control module that above-mentioned one or more modules are controlled, described Digital audio process module is integrated with DAC, the digital signal of handling through described Digital audio process module exports described power amplifier module to after described DAC converts analog signal to, it is characterized in that:
Described audio amplifier also comprises noise reduction module, described Digital audio process module also comprises first unit for scaling and 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.
2. the integrated audio amplifier of a kind of high-quality active according to claim 1 is characterized in that, described noise reduction control module comprises:
The signal level detection module is for detection of the digital signal level of Digital audio process module processing;
The noise reduction Executive Module, be used for judging that described signal level detection module detects level and whether is lower than pre-set threshold value, if being lower than threshold values then controls 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; Threshold values is then controlled described first unit for scaling and described noise reduction module is exported by original signal level size if be higher than.
3. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2 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.
4. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2 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.
5. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2, it is characterized in that: described audio amplifier control module comprises second control module for the described Digital audio process module of control, described second 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 audio amplifier and cross mere suggestion and/or this state information is fed back to the main control system that connects with described audio amplifier, thus too small to user prompt input volume.
6. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2, it is characterized in that: described signal input module comprises for the analog input interface that receives simulated audio signal, be used for receiving the AES input interface of AES digital audio and video signals, the RJ45 input interface that is used for the digital audio and video signals of reception network transmission, analog signal compression amplitude limiter, the digital audio transmitter, wherein, described analog input interface is connected with described Digital audio process module by described analog signal compression amplitude limiter, described AES input interface, the RJ45 input interface is connected with described Digital audio process module by described digital audio transmitter respectively, and described audio amplifier control module is connected with described RJ45 input interface.
7. the integrated audio amplifier of a kind of high-quality active according to claim 6, it is characterized in that: described audio amplifier control module also comprises first control module for the described signal input module of control, described first control module comprises compression amplitude limit state feedback module, 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 demonstration volume that arranges on the described audio amplifier and cross mere suggestion and/or this state information is fed back to the main control system that connects with described audio amplifier, thus excessive to user prompt input volume.
8. the integrated audio amplifier of a kind of high-quality active according to claim 6, it is characterized in that: described analog signal compression amplitude limiter comprises that flowing to the prime balance that connects successively by signal changes non-equilibrium input unit, compression amplitude limit unit and non-equilibrium commentaries on classics balance output unit, described compression amplitude limit unit comprises: be connected in the anti-phase computing amplification module that described prime balance is changeed non-equilibrium input unit and described non-equilibrium commentaries on classics balance output unit, 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.
9. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2, 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. the integrated audio amplifier of a kind of high-quality active according to claim 1 and 2, it is characterized in that: 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750504 CN203136140U (en) | 2012-12-31 | 2012-12-31 | High quality active integrated sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220750504 CN203136140U (en) | 2012-12-31 | 2012-12-31 | High quality active integrated sound box |
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| Publication Number | Publication Date |
|---|---|
| CN203136140U true CN203136140U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220750504 Expired - Lifetime CN203136140U (en) | 2012-12-31 | 2012-12-31 | High quality active integrated sound box |
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| Country | Link |
|---|---|
| CN (1) | CN203136140U (en) |
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2012
- 2012-12-31 CN CN 201220750504 patent/CN203136140U/en not_active Expired - Lifetime
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