CN211880612U

CN211880612U - Network DSP digital power amplifier

Info

Publication number: CN211880612U
Application number: CN201922047618.4U
Authority: CN
Inventors: 徐广健; 吴展亮; 严荣昌; 黄建雄; 毕伟枪
Original assignee: GUANGZHOU KINGRAY INFORMATION TECHNOLOGY CO LTD
Current assignee: GUANGZHOU KINGRAY INFORMATION TECHNOLOGY CO LTD
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-11-06
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a network DSP digital power amplifier, the load simulator comprises a case, the machine case is equipped with front panel and rear panel, machine incasement portion installs the power amplifier mainboard, install the display screen on the front panel, control button, USB mouth and pilot lamp, install analog audio input socket on the rear panel, audio output socket, GPIO data port, data communication interface, ethernet interface and power input port, machine incasement portion still installs AD sampling module, DSP module and DA converter, above-mentioned display screen, control button, the USB mouth, the pilot lamp, analog audio input socket, audio output socket, the GPIO data port, the data communication interface, the ethernet interface, the power input port, AD sampling module, DSP module and DA converter electric connection power amplifier mainboard. The power amplifier can effectively solve the practical use problems of sound mixing, audio pre-stage amplification, sound curve, squeal suppression, noise gate, matrix sound mixing, automatic sound mixing, time delay, pressure limit, phase adjustment and the like.

Description

Network DSP digital power amplifier

Technical Field

The utility model relates to an audio processing technology field specifically is a network DSP digital power amplifier.

Background

In practical use occasions, the conventional analog power amplifier has various problems, such as: lack of DSP function, poor anti-interference capability, incapability of remote operation and the like

In a meeting room, the traditional analog power amplifier can only adjust gain and cannot be connected with a computer, so that the general power amplifier can be placed in a hidden place, the output volume is inconsistent due to the sound of people or the use habit, the gain of the power amplifier needs to be adjusted according to the on-site adjustment, and the position for placing the power amplifier becomes more exquisite.

In the traditional power amplifier mode, an analog signal enters, is amplified through a power amplifier and then is output as an analog signal, but the noise effect is easily formed by the influence of noise in the whole processing process, the analog signal is damaged and becomes a damaged signal, the damaged analog signal cannot be restored to the original signal again, and the damaged part can be amplified to generate more noise when the power amplifier amplifies the analog signal.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming that prior art mentioned, the utility model provides a network DSP digital power amplifier, computer remote control is connected to the accessible, and the interference killing feature is stronger, also can solve practical use problems such as noise gate, sound curve, matrix audio mixing, time delay, pressure limit, phase adjustment.

The utility model discloses a solve the technical means that above-mentioned technical problem took and do: network DSP digital power amplifier, including the quick-witted case, the machine case is equipped with front panel and rear panel, machine case internally mounted has the power amplifier mainboard, install display screen, control button, USB mouth and pilot lamp on the front panel, install analog audio Input socket, audio output socket, GPIO (general Purpose Input output) data port (bus expander, the extension of I/O mouth), data communication interface, ethernet interface and power Input port on the rear panel, machine case internally still installs remote control module, AD sampling module, DSP (digital signal processing) module and DA converter, display screen, control button, USB mouth, pilot lamp, analog audio Input socket, audio output socket, GPIO data port, data communication interface, power Input port, AD sampling module, DSP module and DA converter electrical connection the power amplifier mainboard, the Ethernet interface is sequentially connected with the remote control module and the power amplifier mainboard in a data mode. The power amplifier mainboard of the network DSP digital power amplifier of the design passes through an input signal which is an analog signal and is processed by the AD sampling module, the sampling rate is 48k24 bits, and the sampled data enters the DSP module for processing. The digital signal processed by the DSP is connected to the DA converter and converted into an analog signal to be output. And digital signals are used in the processing process, so that the anti-interference capability is stronger. The power amplifier supports TCP/IP remote control, and can use host computer software to remotely control and adjust gain and use various DSP functions after being connected with a network cable.

In order to further optimize the design scheme, a noise Gate (Gate or NoiseGate, a special form of low-level extender), an equalizer module, a MATRIX mixing module (MATRIX MIX), an audio delay, a compressor (Compressors) and a Limiter (Limiter) are further installed inside the case, and the noise Gate, the equalizer module, the MATRIX mixing module, the audio delay, the compressor and the Limiter are electrically connected to the power amplifier main board and respectively provide the following functions:

noise Gate function of Noise Gate: we can preset a start-up threshold for the noise gate, with the highest start-up threshold being-60 dBu and a start-up time, then the actual effect is that when our signal is below-60 dBu, then the machine is muted, there is no output, and the noise floor is lowest. An optimum signal-to-noise ratio can be obtained.

The equalizer function: the power amplifier provides an input equalizer and an output equalizer, and the input equalizer has 5 sections EQ, and the frequency, the type, the Q value and the gain of each section EQ can be freely set. The output equalizer has 8 sections, and the frequency, type, Q value and gain of each section EQ can be set optionally. Both equalizers are provided with high-low pass filters, the types of the filters are 14 optional, and the appropriate filters can be selected according to different occasions and requirements.

Power amplifier MATRIX MIX MATRIX sound mixing: when different output paths are connected with different devices, different input sound sources need to be cut off the desired output devices at will according to needs, if the traditional method is realized by plugging and unplugging wires, but after matrix sound mixing, the problem becomes simple, and only corresponding input in the matrix sound mixing is configured to output.

Delay delayer: an audio delay is an effector that produces reverberation or echo. The method is widely used for stage sound and karaoke. The delay time can be from 50 milliseconds to more than 1 second, the delayer for the electric guitar is generally between 20 milliseconds and 476 milliseconds, the reverberation effect is generated when the time is short (the echo is generated when the hall effect person is long (the sound is rich, full and spacious after the valley effect person electric guitar passes through the delayer), the on and off can be performed, and the time length of the delay can be set.

Compressors (Compressors): an amplifier that inherently has a reduced gain as the input signal level increases, essentially changing the ratio of input to output signals. The most critical parameter is the start-control level of compression, and after the start-control level is set, how much more audio signals need to be compressed is known? We need to set another parameter, the compression ratio.

Limiter (Limiter): it is a circuit capable of smoothing signal voltage amplitude according to a limited range, and is also called a clipper. The effect of the clipping circuit is to limit the amplitude of the output signal within a certain range, i.e. when the input voltage exceeds or falls below a certain reference value, the output voltage will be limited to a certain level (called clipping level) and will no longer vary with the input voltage.

In order to further optimize the design scheme, a data storage is further installed in the case, the data storage is connected with the power amplifier mainboard in a data mode, when various parameters of the machine are set, the parameters are required to be stored, a file storage function is needed, the parameter naming of the machine is stored in a file, and the machine can be called conveniently when needed next time.

In order to further optimize the design scheme, the data communication interface comprises an RS232 serial data communication interface and an RS485 communication interface.

In order to further optimize the design scheme, a switch power supply module which converts alternating current of commercial power AV 180V-264V 50/60Hz into direct current with various voltages used by the power amplifier main board is further arranged in the case, and the switch power supply module is electrically connected with the power supply input port and the power amplifier main board. A switching power supply module is developed to convert alternating current into direct current and output a plurality of groups of direct current, and the direct current is connected to the upper surface of a power amplifier mainboard of the whole machine by an XH2.54 flat cable.

In order to further optimize the design scheme, the network part for connecting the hand-in-hand between the communication and the realization machines is designed into a module form to be inserted on a power amplifier mainboard, and an XH2.0 pin header is used, so that the observation and the signal acquisition are convenient, and the management is convenient.

In order to further optimize the design scheme, the power amplifier mainboard and the panel of the whole machine are separated and connected by an XH2.54 cable. The DSP and the MCU of the whole machine are arranged on the same PCB, and are inserted on the power amplifier mainboard by using double rows of pins.

In order to further optimize the design scheme, heat dissipation windows are reserved on two sides of the case, and dustproof screen cloth is additionally arranged on the windows in order to prevent sundries from entering the machine along the windows.

The utility model has the advantages that: the designed network DSP digital power amplifier is simple in structure and powerful in function, is provided with corresponding upper computer software, can configure various parameters of a machine through the upper computer software or a panel according to the requirements of a site to meet the use requirements of people, and is connected with the upper computer in four ways, wherein one way is an 10/100Mbps self-adaptive Ethernet interface, supports automatic switching of AUTO-MDIX network cable cross direct connection, supports A, B, C three types of IP sections, the second way is USB 2.0 connection, the third way is RS232 connection, and the fourth way is an RS485 interface; the input signal of the power amplifier is an analog signal, the sampling rate is 48k24 bits after AD sampling, the sampled data enters a DSP module for processing, a signal digital signal processed by the DSP is received by a DA and converted into an analog signal for output, a plurality of algorithms are used in the digital signal processing, and a plurality of practical functions are realized, such as a Noise Gate function, an equalizer function, MATRIX MIX MATRIX audio mixing, a Delay, a compressor, an amplitude limiter, a filing function and the like, so that the practical use problems of sound curve, Noise Gate, MATRIX audio mixing, time Delay, pressure limit, phase adjustment and the like can be effectively solved.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a rear view of the structure of the present invention;

fig. 3 is a top view of the structure of the present invention;

fig. 4 is a schematic block diagram of the circuit of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-4, network DSP digital power amplifier, including quick-witted case 1, the quick-witted case is equipped with front panel and rear panel, quick-witted case 1 internally mounted has the power amplifier mainboard, install color display screen 3, control button 4 (including soft switch button, mute button, tuning knob etc.), USB mouth 5 and pilot lamp 2 on the front panel 1, install analog audio Input socket 6, audio output socket 7, gpio (general Purpose Input output) data port 8 (bus expander, the extension of I/O mouth), (Dante) data communication interface 9, ethernet interface 10 and power Input port 11 on the rear panel, machine incasement portion still installs AD sampling module, DSP (digital signal processing) module and DA converter, color display screen 3, control button 4, USB mouth 5, pilot lamp 2, analog audio Input socket 6, Audio output socket 7, GPIO data mouth 8, (Dante) data communication interface 9(232, 485 data communication interface), power input port 11, AD sampling module, DSP module and DA converter electric connection the power amplifier mainboard, ethernet interface 10, data connection in proper order the remote control module with the power amplifier mainboard. The power amplifier mainboard of the network DSP digital power amplifier of the design passes through an input signal which is an analog signal and is processed by the AD sampling module, the sampling rate is 48k24 bits, and the sampled data enters the DSP module for processing. The digital signal processed by the DSP is connected to the DA converter and converted into an analog signal to be output. DSP blocks use many algorithms in digital signal processing and implement many practical functions.

In order to further optimize the design scheme, a noise Gate (Gate or NoiseGate, a special form of low-level extender), an equalizer module, a MATRIX mixing module (MATRIX MIX), an audio delayer, a compressor (Compressors) and a Limiter (Limiter) are further installed inside the case, and the noise Gate, the equalizer module, the MATRIX mixing module, the audio delayer, the compressor and the Limiter are electrically connected with the power amplifier mainboard.

In order to further optimize the design scheme, a data storage is further installed in the case 1, the data storage is connected with the power amplifier mainboard in a data mode, when various parameters of the machine are set, the parameters are required to be stored, a file storage function is needed, the parameter names of the machine are stored in a file, and the machine can be called and taken conveniently when needed next time.

To further optimize the design, the (Dante) data communication interface 9 includes an RS232 serial data communication interface and an RS485 communication interface.

To further optimize the design, from a conventional perspective, the best analog audio input and output uses a cannon port, the analog audio input port uses a cannon female head, the analog audio output port uses a cannon male head, and the GPIO data port and the RS232 and RS485 (data communication interfaces) both use standard phoenix sockets.

In order to further optimize the design, heat dissipation windows are reserved on two sides of the machine case 1, and in order to prevent sundries from entering the machine along the windows, dustproof screen cloth is additionally arranged on the windows.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, but the scope of the present invention is also covered by the appended claims and the simple equivalent changes and modifications made by the new claims and the new descriptions.

Claims

1. The network DSP digital power amplifier comprises a case and is characterized in that the case is provided with a front panel and a rear panel, a power amplifier mainboard is installed inside the case, a display screen, a control button, a USB port and an indicator light are installed on the front panel, an analog audio input socket, an audio output socket, a power amplifier output socket, a GPIO data port, a data communication interface, an Ethernet interface and a power input port are installed on the rear panel, a remote control module, an AD sampling module, a DSP module and a DA converter are also installed inside the case, and the display screen, the control button, the USB port, the indicator light, the analog audio input socket, the audio output socket, the GPIO data port, the data communication interface, the power input port, the AD sampling module, the DSP module, the DA converter and the power amplifier mainboard are electrically connected with the power amplifier mainboard; the Ethernet interface is sequentially connected with the remote control module and the power amplifier mainboard in a data mode.

2. The network DSP digital power amplifier of claim 1 wherein said data communication interface comprises an RS232 serial data communication interface and an RS485 communication interface.

3. The network DSP digital power amplifier of claim 1, characterized in that a switch power module for converting AC power into DC power is further installed in the case, and the switch power module is electrically connected to the power input port and the power amplifier motherboard.

4. The network DSP digital power amplifier of claim 1, wherein the GPIO data port and the data communication interface both employ a Phoenix socket.

5. The network DSP digital power amplifier of claim 1 wherein both sides of said chassis and front panel are provided with heat dissipation windows.

6. The network DSP digital power amplifier of claim 5, characterized in that a dustproof screen cloth is additionally installed at the heat dissipation window.

7. The network DSP digital power amplifier of claim 1, characterized in that a noise gate, an equalizer module, a matrix mixing module, an audio delay, a compressor and a limiter are further installed inside the case, and the noise gate, the equalizer module, the matrix mixing module, the audio delay, the compressor and the limiter are electrically connected to the power amplifier main board.