CN212969576U - Digital power amplifier system based on PurePath intelligent loudspeaker compensation - Google Patents
Digital power amplifier system based on PurePath intelligent loudspeaker compensation Download PDFInfo
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Abstract
The utility model discloses a digital power amplifier system based on PurePath intelligent loudspeaker compensation, including main control unit, audio frequency processing unit, interactive unit and input/output unit, main control unit and audio frequency processing unit and interactive unit are connected respectively, input/output unit and audio frequency processing unit are connected, wherein, main control unit includes ARM treater and NAND module, RAM module, information management module, USB module, digital interface, communication interface, LAN module and USB interface that are connected respectively with the ARM treater, NAND module and RAM module are to data and parameter storage, information management module carries out information classification management through communication interface and external connection, USB module and USB interface connection, USB interface and LAN module are connected with interactive unit and communicate, digital interface and audio frequency processing unit are connected, input/output unit transmits to audio frequency processing unit after gathering external voice signal, audio frequency processing unit processes the voice signal digitally, then the digital audio is amplified, filtered and then is output by the input and output part.
Description
Technical Field
The utility model belongs to the technical field of digital power amplifier, especially, relate to a digital power amplifier system based on PurePath intelligent speaker compensation.
Background
In the prior art, problems of sound field distortion of a loudspeaker, poor matching between a power amplifier and a sound box and the like in a sound system are solved in an original way by adopting better equipment such as the loudspeaker, a professional equalizer and the like, so that the cost is high, the equipment is complex, sound field debugging is required to be carried out again in different use environments, and a large amount of repeated debugging work is caused. With the development of digital signal processing technology and algorithm, the digital compensation algorithm technology is adopted, so that not only can low cost be realized, but also the hardware design is flexible, the applicability is strong, and the advantages of improving the performance and the audio quality are obvious.
And measuring the frequency response characteristic of the sound amplification system, measuring the field sound field parameters of the sound system, adjusting a signal equalizer by using a sound console according to the measurement result, amplifying the signal, outputting the amplified signal to the sound box system, and performing frequency division by using a frequency divider inside the sound box to connect to each low-pitch loudspeaker and each medium-pitch loudspeaker to realize audio playing. However, due to different application environments, sound field parameters are different, each application site needs to be measured and debugged independently, the work is complex, the number of system devices is large, and the problems of high cost, complexity, lack of interoperability and the like are caused.
The prior art has at least the following disadvantages:
1) each application place needs to measure the sound field parameters independently, and a large amount of repetitive tedious work is required;
2) the parameters after debugging have no universality due to different settings such as sizes, shapes, loudspeaker boxes and the like in different places;
3) the required sound field measuring equipment, sound console equalizer and the like are more, and the cost and the complexity are high;
4) the requirements of later performance optimization upgrading and the like cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a overcome the defect that prior art exists, provide a digital power amplifier system based on intelligent speaker compensation technique of digital signal measurement and compensation technique, to in the various different application environment, realize audio frequency amplification output in real time, multichannel MIC sampling access, digital signal measurement and compensation algorithm technique realize that multichannel audio signal's dynamic equilibrium, sound field location, full frequency band AGC, amplitude limiting compression, precompensation and algorithm processing such as correction, solve power amplifier system audio tone quality sound poor sound effect and customer specific sound requirement scheduling problem; and various communication interfaces such as LAN Ethernet, serial ports and the like are provided, and data transmission and control between the system and other equipment and between third-party equipment are realized.
A digital power amplifier system based on Purpath intelligent loudspeaker compensation comprises a main control part, an audio processing part, an interaction part and an input/output part, wherein the main control part is respectively connected with the audio processing part and the interaction part, the input/output part is connected with the audio processing part, wherein,
the main control part comprises an ARM processor and a NAND module, an RAM module, an information management module, a USB module, a digital interface, a communication interface, a LAN module and a USB interface which are respectively connected with the ARM processor, wherein the NAND module and the RAM module store data and parameters, the information management module is connected with the outside through the communication interface for information classification management, the USB module is connected with the USB interface, the USB interface and the LAN module are connected and communicated with the interaction part, the digital interface is connected with the audio processing part, the input and output part collects external voice signals and then transmits the external voice signals to the audio processing part, and the audio processing part digitally processes the voice signals and then amplifies and filters the digital audio signals and then transmits the amplified and filtered digital audio signals to the input and output part for output;
the audio processing part comprises a digital audio processing module, a digital signal amplification module, an AUX module, an optical fiber module, a microphone collector, an output module, a memory, a temperature module and a power management module, the digital audio processing module is connected with the digital interface, and is also connected with the digital signal amplification module, the AUX module, the optical fiber module, the microphone collector and the memory, the digital signal amplification module is also connected with the temperature module, the power management module and the output module, and the output module is also connected with the input and output part;
the input and output part comprises an MIC array and a loudspeaker, the MIC array is connected with the microphone collector, and the loudspeaker is connected with the output module;
the interaction part comprises a control panel, a display panel, a multi-path concentrator module and an intelligent terminal, the control panel and the display panel are both connected with the ARM processor, and the multi-path concentrator module is connected with the intelligent terminal and the LAN module respectively.
Preferably, the digital interface comprises a 74AVC4T774 logic converter.
Preferably, the communication interface comprises an SN65HVD1781DR chip and an MAX3221ECDBR chip, so as to realize a serial communication function.
Preferably, the digital audio processing module comprises an ADC conversion circuit, an iCE65L04F FPGA chip, an AT45DB321D-SU memory, and an MIC signal acquisition circuit, and performs an SPL curve parameter comparison process on the initial signal and a signal acquired by the MIC signal acquisition circuit to generate compensation correction data.
Preferably, the digital signal amplification module comprises a TAS5766M smart amplifier chip and a control circuit, a processor is arranged in the TAS5766M, compensation correction data of the digital audio processing module are received through an I2C interface, and internal parameter register data are controlled to realize control of volume, overflow and EQ balance so as to meet the requirement of loudspeaker SPL curve defect compensation.
Preferably, the temperature module comprises an LM75BDP digital temperature sensor and an I2C bus, the temperature acquisition of the multi-path power amplification circuit is carried out, and the digital signal amplification module is subjected to overheat protection through a temperature state.
Preferably, the power management module comprises a TPS79147DBVT chip, a TPS79933DDCT chip and a power control switch, and performs voltage conversion and power switch control.
Preferably, the optical fiber module comprises a WTJ-035 and 100ABG-T optical fiber transmitter, a WTJ-035 and 100ABG-R optical fiber receiver, an AK4113VF digital audio receiver, an AK4127 digital converter and an AK4103AV digital signal transmitter for receiving and transmitting optical fiber signals.
Preferably, the AUX module includes a PCM5102A chip and an AK4430 chip, and performs analog-to-digital conversion, digital-to-analog conversion, and input and output functions of external audio signals.
Compared with the prior art, the utility model adopts the digital sound effect processing technology and the digital processing chip to realize the digital audio signal compensation, realizes the high integration of the processing circuit, reduces the complex procedure of the circuit system, and reduces the cost and the waste of raw materials; a high-performance digital processor is adopted, digital MIC acquisition and data compensation are carried out, and sound field distortion is corrected in real time; the compensation library and the correction algorithm are preset by the system, so that the user can conveniently realize convenient control and application, and the use difficulty of the system is reduced; the LAN Ethernet, the serial port and other communication interfaces are adopted, so that the system expansion and the compatibility with other equipment are facilitated, the application market of the system is increased, the repeated purchase of different equipment by a user is reduced, and the user cost is saved; and the digital signal processing technology and the software control algorithm are adopted, so that the system performance can be upgraded conveniently in the later period.
Drawings
Fig. 1 is a block diagram of the digital power amplifier system based on the PurePath smart speaker compensation of the present invention;
fig. 2 is a structural block diagram of a main control part of the digital power amplifier system based on the PurePath smart speaker compensation of the present invention;
fig. 3 is a block diagram of the structure of the audio processing unit of the digital power amplifier system based on the PurePath smart speaker compensation of the present invention;
fig. 4 is a specific structure block diagram of the digital power amplifier system based on the PurePath smart speaker compensation of the present invention;
fig. 5 is the utility model discloses digital power amplifier system's pronunciation MIC array voice acquisition structure block diagram based on Purpath intelligent loudspeaker compensation.
The following detailed description of the invention will be made in conjunction with the above-described drawings.
Detailed Description
The technical solution provided by the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, a block diagram of a digital power amplifier system based on the compensation of the PurePath smart speaker according to the present invention is shown, which includes a main control unit 30, an audio processing unit 50, an interactive unit 40 and an input/output unit 60, wherein the main control unit 30 is connected to the audio processing unit 50 and the interactive unit 40, respectively, the input/output unit 60 is connected to the audio processing unit 50, wherein,
referring to fig. 2, the main control unit 30 includes an ARM processor 1 and a NAND module 2, a RAM module 3, an information management module 4, a USB module 5, a digital interface 6, a communication interface 7, a LAN module 8 and a USB interface 9 respectively connected to the ARM processor 1, the NAND module 2 and the RAM module 3 store data and parameters, the information management module 4 is connected to the outside through the communication interface 7 for information classification management, the USB module 5 is connected to the USB interface 9, the USB interface 9 and the LAN module 8 are connected to the interactive unit 40 for communication, the digital interface 6 is connected to the audio processing unit 50, the input/output unit 60 collects external voice signals and transmits the signals to the audio processing unit 50, the audio processing unit 50 digitizes the voice signals, amplifies and filters the digital audio signals, and then outputs the signals to the input/output unit 60;
referring to fig. 3, the audio processing portion 50 includes a digital audio processing module 10, a digital signal amplification module 12, an AUX module 16, an optical fiber module 11, a microphone collector 17, an output module 18, a memory 25, a temperature module 15, and a power management module 24, the digital audio processing module 10 is connected to the digital interface 6, and is further connected to the digital signal amplification module 12, the AUX module 16, the optical fiber module 11, the microphone collector 17, and the memory 25, the digital signal amplification module 12 is further connected to the temperature module 15, the power management module 24, and the output module 18 is further connected to the input/output portion 60;
referring to fig. 4, the input/output unit 60 includes an MIC array 22 and a speaker 23, the MIC array 22 is connected to the microphone collector 17, and the speaker 23 is connected to the output module 18; the interaction part 40 comprises a control panel 13, a display panel 14, a multi-path concentrator module 20 and an intelligent terminal 19, wherein the control panel 13 and the display panel 14 are both connected with the ARM processor 1, and the multi-path concentrator module 20 is respectively connected with the intelligent terminal 19 and the LAN module 8.
In a particular embodiment, digital interface 6 includes a 74AVC4T774 logic converter.
The communication interface 7 comprises an SN65HVD1781DR chip and an MAX3221ECDBR chip, and realizes the serial port communication function.
The digital audio processing module 10 comprises an ADC conversion circuit, an iCE65L04F FPGA chip, an AT45DB321D-SU memory 25 and an MIC signal acquisition circuit, and SPL curve parameter comparison processing is carried out on the initial signal and the signal acquired by the MIC signal acquisition circuit to generate compensation correction data.
The digital signal amplifying module 12 comprises a TAS5766M intelligent amplifier chip and a control circuit, a TAS5766M is internally provided with a processor, receives compensation correction data of the digital audio processing module 10 through an I2C interface, and controls internal parameter register data to realize control of volume, overflow and EQ balance so as to meet the requirement of SPL curve defect compensation of the loudspeaker 23.
The temperature module 15 comprises an LM75BDP digital temperature sensor and an I2C bus, and is used for collecting the temperature of the multi-path power amplification circuit and carrying out overheat protection on the digital signal amplification module 12 through the temperature state.
The power management module 24 includes a TPS79147DBVT chip, a TPS79933DDCT chip, and a power control switch, and performs voltage conversion and power switch control.
The optical fiber module 11 comprises WTJ-035 and 100ABG-T optical fiber transmitters, WTJ-035 and 100ABG-R optical fiber receivers, AK4113VF digital audio receivers, AK4127 digital converters and AK4103AV digital signal transmitters for receiving and transmitting optical fiber signals.
The AUX module 16 includes a PCM5102A chip and an AK4430 chip, and performs analog-to-digital conversion, digital-to-analog conversion, and input/output functions of external audio signals.
The system center control function comprises an ARM processor, a 4GB NAND module 2, a 4GB RAM module 3, a digital interface 6, a USB module 5 and a communication module. After the system is started, the ARM processor 1, the NAND module 2 and the RAM module 3 start system software together, after the system is started, the digital audio processing module 10 and the plug-in memory 25 are controlled to perform digital signal compensation through the digital interface 6, the interaction function with a user is realized through the display panel 14 and the control panel 13, the user can set related functions and working modes, and user information and parameter setting are displayed through the display panel 14; the memory 25 is used for accessing relevant setting parameters such as a system preset mode, a user-defined mode and the like; the network interconnection is realized through the multi-channel concentrator module 20 and the LAN module 8, and the data communication function between the system and other third parties 21 is realized through the communication interface 7; the functions of automatic downloading and updating of system control programs, data storage and backup and the like are realized through the USB interface 9.
The signal amplification output function is composed of an ARM processor, a LAN module 8, a digital audio processing module 10, a digital signal amplification module 12, an output module 18, an AUX module 16, a temperature module 15, a memory 25, a loudspeaker 23 and the like. The digital audio signal is compensated and then can be output to the digital signal amplification module 12 through the internal interface of the digital audio processing module 10, the amplification module circuit realizes the signal amplification function according to the control state of the ARM processor, and the signal is processed by the output module 18 to realize the processing functions of signal overflow, bandwidth, filtering and the like and then is output to the loudspeaker 23; the power management module 24 is used for detecting abnormal states such as overcurrent, overvoltage and overtemperature, and realizing functions of processing the abnormal states, controlling standby energy conservation and the like of the whole system. The LAN module 8 is also connected to other signal paths 26 to implement function expansion.
Referring to fig. 5, when the system is used for the first time, the system firstly performs basic parameter measurement and correction, the ARM processor controls the digital audio processing module 10 to generate a test signal, the audio signal amplified by the digital signal amplifying module 12 is output to the loudspeaker 23, after the MIC221 in the MIC array 22 collects the sound field (1 to n) of each sound box, the internal microphone signal processors 171(1 to n) carry out ADC conversion to digital signals, then the digital signals are subjected to signal comparison and compensation algorithm processing by the digital audio processing module 10, the memory 25, the ARM processor 1 and the like, according to relevant settings such as user selection functions and parameters, a compensation algorithm preset in a memory 25 is called for compensation, a compensated digital signal is amplified by a digital signal amplification module 12 and then output to a loudspeaker 23, an MIC221 in an MIC array 22 acquires a sound field signal for calibration, and software is switched to a system normal compensation algorithm after the set parameter requirements are met; the compensation check can be carried out in real time in the using process. Meanwhile, a plurality of algorithm processes such as reverberation, equalization, dynamic DDE, DRC, limiter, crosstalk and the like generated by PurePath software are preset in the memory 25, and a user can realize the processing and control of a plurality of audio parameters such as equalization, reverberation, high and low tones, volume, loudness and the like of a digital audio signal through the digital audio processing module 10.
The above description of the embodiments is only intended to help understand the method of the present invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A digital power amplifier system based on Purpath intelligent loudspeaker compensation is characterized by comprising a main control part, an audio processing part, an interaction part and an input/output part, wherein the main control part is respectively connected with the audio processing part and the interaction part, the input/output part is connected with the audio processing part, wherein,
the main control part comprises an ARM processor and a NAND module, an RAM module, an information management module, a USB module, a digital interface, a communication interface, a LAN module and a USB interface which are respectively connected with the ARM processor, wherein the NAND module and the RAM module store data and parameters, the information management module is connected with the outside through the communication interface for information classification management, the USB module is connected with the USB interface, the USB interface and the LAN module are connected and communicated with the interaction part, the digital interface is connected with the audio processing part, the input and output part collects external voice signals and then transmits the external voice signals to the audio processing part, and the audio processing part digitally processes the voice signals and then amplifies and filters the digital audio signals and then transmits the amplified and filtered digital audio signals to the input and output part for output;
the audio processing part comprises a digital audio processing module, a digital signal amplification module, an AUX module, an optical fiber module, a microphone collector, an output module, a memory, a temperature module and a power management module, the digital audio processing module is connected with the digital interface, and is also connected with the digital signal amplification module, the AUX module, the optical fiber module, the microphone collector and the memory, the digital signal amplification module is also connected with the temperature module, the power management module and the output module, and the output module is also connected with the input and output part;
the input and output part comprises an MIC array and a loudspeaker, the MIC array is connected with the microphone collector, and the loudspeaker is connected with the output module;
the interaction part comprises a control panel, a display panel, a multi-path concentrator module and an intelligent terminal, the control panel and the display panel are both connected with the ARM processor, and the multi-path concentrator module is connected with the intelligent terminal and the LAN module respectively.
2. The PurePath smart speaker compensation-based digital power amplifier system of claim 1, wherein the digital interface comprises a 74AVC4T774 logic converter.
3. The PurePath intelligent speaker compensation-based digital power amplifier system of claim 1, wherein the communication interface comprises an SN65HVD1781DR chip and an MAX3221ECDBR chip, thereby implementing a serial port communication function.
4. The PurePath smart speaker compensation-based digital power amplifier system of claim 1, wherein the digital audio processing module comprises an ADC conversion circuit, an iCE65L04F FPGA chip, an AT45DB321D-SU memory, and an MIC signal acquisition circuit.
5. The PurePath smart speaker compensation-based digital power amplifier system of claim 4, wherein the digital signal amplification module comprises a TAS5766M smart amplifier chip and a control circuit, and a TAS5766M built-in processor.
6. The PurePath intelligent speaker compensation-based digital power amplifier system of claim 1, wherein the temperature module comprises an LM75BDP digital temperature sensor and an I2C bus, the temperature acquisition of the multi-path power amplifier circuit is performed, and the digital signal amplifier module is protected from overheating through a temperature state.
7. The PurePath smart speaker compensation-based digital power amplifier system of claim 1, wherein the power management module comprises a TPS79147DBVT chip, a TPS79933DDCT chip and a power control switch for voltage conversion and power switch control.
8. The digital power amplifier system based on PurePath smart speaker compensation of claim 1, wherein the optical fiber module comprises WTJ-035-100ABG-T optical fiber transmitter, WTJ-035-100ABG-R optical fiber receiver, AK4113VF digital audio receiver, AK4127 digital converter and AK4103AV digital signal transmitter for receiving and transmitting optical fiber signals.
9. The PurePath smart speaker compensation-based digital power amplifier system of claim 1, wherein the AUX module comprises a PCM5102A chip and an AK4430 chip for analog-to-digital conversion, digital-to-analog conversion and input/output of external audio signals.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113542979A (en) * | 2021-07-29 | 2021-10-22 | 广州朗国电子科技股份有限公司 | Method and device for adjusting digital power amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113542979A (en) * | 2021-07-29 | 2021-10-22 | 广州朗国电子科技股份有限公司 | Method and device for adjusting digital power amplifier |
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