Audio processor capable of presetting sound box data of FIR (Finite Impulse Response) filter

Abstract

The utility model discloses an audio processor capable of presetting FIR filter sound box data, which comprises a box body, a signal transmission module, a DSP audio signal processing module, a control interface module and a power supply module, the signal transmission module is fixedly connected to the upper end of the box body, the control interface module is fixedly connected to the lower end of the box body, and the DSP audio signal processing module is fixedly connected to the lower end of the box body. The power supply module is fixedly connected to the right side in the box body. The audio processor further comprises an IIR filter module and an FIR filter module. The utility model belongs to the technical field of filter sound box data, and particularly relates to an audio processor capable of presetting FIR filter sound box data.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter sound box data, and in particular relates to an audio processor capable of presetting FIR filter sound box data. Background Art

[0002] At present, there are many types of speakers used in modern professional audio systems, including three-way full-range main speakers, subwoofers, two-way full-range speakers and stage monitor speakers. Audio processors are used in the construction and installation of audio systems. Audio processors can perform functions such as speaker frequency division, compression, delay, gain and data storage, so that the audio system can be better debugged. However, the existing audio processors will bring phase deviation after frequency division processing for different speakers. This is because the original phase curves of different speakers are different, resulting in the use of multiple speakers in system applications. Not only does the sound pressure level not increase, but it will cause the frequency of the two sets of speakers with a phase difference of 180 degrees to cancel each other out.

[0003] After debugging the speaker system, we need to save the speaker data to the audio processor memory for next use. At this time, if we need to adjust or replace one of the channels of the audio processor, the existing audio processor does not support channel call data. We can only reselect one of the channels of the audio processor, remeasure the speaker data and save it to the machine memory, which adds a heavy workload to the on-site debugging system. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing audio processor does not support channel call data, and can only re-select one channel of the audio processor to re-measure the speaker data and then save it to the machine memory, which increases the heavy workload of the on-site debugging system.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows: an audio processor that can preset FIR filter speaker data, including a cabinet, a signal transmission module, a DSP audio signal processing module, a control interface module and a power supply module, the signal transmission module is fixedly connected to the upper end of the cabinet, the control interface module is fixedly connected to the lower end of the cabinet, the power supply module is fixedly connected to the right side inside the cabinet, and the audio processor also includes an IIR filter module and a FIR filter module.

[0006] Furthermore, the signal transmission module includes an audio input interface and an audio output interface, the audio input interface is provided with four groups, the audio output interface is provided with eight groups, and the audio input interface is respectively connected to each audio output port in this link.

[0007] Furthermore, the DSP audio signal processing module includes input channel noise gate, input and output channel equalization, input channel compression, input and output channel polarity, output channel limiting, input and output channel delay, and input and output channel mute.

[0008] Furthermore, the output channel can be optimized by the user setting a target frequency response curve, and then selecting the speaker frequency range to be processed and how many bands of PEQ equalization to use.

[0009] Furthermore, the IIR filter module includes high-pass and low-pass response filters, and the response filters are arranged into eight groups of orders.

[0010] Furthermore, the FIR filter module includes a window type, a tap number, a high-pass filter, a low-pass filter, and a band-pass filter.

[0011] Furthermore, the data storage module is a DSP audio signal module that stores the processed audio signal data of each channel independently.

[0012] Furthermore, the control interface module includes a USB control interface, an RS485 control interface and an Ethernet control interface, and a computer is used to remotely control the audio processor through any one of the control protocols to edit data online or offline or upload and download data.

[0013] Furthermore, the power supply module includes a DSP working power supply, a control interface working power supply and a panel LCD display working power supply. The input power supply 220V / 50 Hz AC is rectified by a switching tube to output low-voltage DC to power different modules.

[0014] Furthermore, the audio processor is also provided with panel buttons and an LCD display module, which include an input channel mute button, an output channel mute button and an audio processor function button; the LCD screen display module displays the working data and the status of the connection control module; the user computer operation interface provides the user with adjustment control of each channel function, and the debugging data will be saved in the computer local file and machine memory.

[0015] After adopting the above structure, the utility model has the following beneficial effects:

[0016] Read speaker data on any channel of the audio processor to achieve arbitrary combination of different speaker data on the audio processor. According to the set target frequency response curve, the speaker frequency response curve is optimized through the automatic equalization function to quickly improve the debugging efficiency.

[0017] The audio processor supports channel call data. There is no need to re-select one of the channels of the audio processor to re-measure the speaker data and then save it to the machine memory, which adds a heavy workload to the on-site debugging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0019] Figure 1 It is a schematic diagram of the overall structure proposed by the utility model;

[0020] Figure 2 The overall workflow diagram proposed for the utility model;

[0021] Figure 3 This is the workflow diagram of the DSP audio signal processing module proposed by the utility model;

[0022] Figure 4 This is the working flow diagram of the control interface module proposed by the utility model;

[0023] Figure 5 This is a working diagram of the power supply module proposed in the utility model.

[0024] In the attached drawings: 1. cabinet, 2. signal transmission module, 3. control interface module, 4. power supply module, 5. IIR filter module, 6. FIR filter module, 7. audio input interface, 8. audio output interface, 9. channel noise gate, 10. channel equalization, 11. channel compression, 12. channel limiting, 13. channel delay, 14. DSP audio signal processing module, 15. USB control interface, 16. Ethernet control interface, 17. RS485 control interface, 18. LCD display module. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, an audio processor capable of presetting FIR filter speaker data comprises a cabinet 1, a signal transmission module 2, a DSP audio signal processing module 14, a control interface module 3 and a power supply module 4, wherein the signal transmission module 2 is fixedly connected to the upper end of the cabinet 1, the control interface module 3 is fixedly connected to the lower end of the cabinet 1, the power supply module 4 is fixedly connected to the right side inside the cabinet 1, and the audio processor further comprises an IIR filter module 5 and a FIR filter module 6.

[0026] like Figure 1 As shown, the signal transmission module 2 includes an audio input interface 7 and an audio output interface 8. The audio input interface 7 is provided with four groups, and the audio output interface 8 is provided with eight groups. The audio input interface 7 is connected to each audio output port in this way.

[0027] like Figure 2-3 As shown, the DSP audio signal processing module 14 includes an input channel noise gate 9, an input and output channel equalizer 10, an input channel compression 11, an input and output channel polarity, an output channel limiter 12, an input and output channel delay 13, and an input and output channel mute.

[0028] like Figure 4 As shown, the control interface module 3 includes a USB control interface 15, an RS485 control interface 17 and an Ethernet control interface 16, and a computer is used to remotely control the audio processor through any one of the control protocols, to edit data online or offline or to upload and download data.

[0029] like Figure 5 As shown, the power supply module 4 includes a DSP working power supply, a control interface working power supply and a panel LCD display working power supply. The input power supply 220V / 50 Hz AC is rectified by a switch tube to output low-voltage DC to power different modules.

[0030] Among them, the output channel can set the target frequency response curve through the user, and then select the speaker frequency range to be processed, and use the number of PEQ equalization sections for optimization. The IIR filter module 5 includes high and low pass response filters, and the response filter is set to eight groups of orders. The FIR filter module 6 includes window type, number of taps, high pass filter, low pass filter, and band pass filter. The data storage module is a DSP audio signal module that presets and independently saves the processed data of the audio signal of each channel. The audio processor is also provided with a panel button and an LCD display module 18, which includes an input channel mute button, an output channel mute button and an audio processor function button, and the LCD screen displays the working data of the display module and the status of the connection control module.

[0031] During specific use, first, analog audio is input through the audio input interface 7, the audio signal is converted into a digital signal, the noise gate 9 filters the noise in the digital signal, the gain module gains the filtered digital signal, the digital signal is equalized through the channel equalizer 10 module, the equalized digital signal is compressed by the compression module, and the digital signal is extended through the channel delay 13 module, and the data storage module saves the input channel data of the digital signal.

[0032] At the same time, the digital signal is filtered through the FIR filter and the IIR filter respectively, the digital signal is extended through the channel delay 13 module, the gain module gains the filtered digital signal, and the channel limiter 12 sets the threshold of the digital signal and outputs it through the audio output interface 8.

[0033] like Figure 4 As shown, the input noise gate 9 can filter the noise of the audio system to ensure the normal output of the system signal. The input and output channels have 16-band parametric equalizers PEQ. The input channel compression 11 can buffer the input signal to ensure that the audio signal is transmitted to the output channel without distortion and with a large dynamic margin. The output channel limiter 12 can set a reasonable threshold to protect the speaker unit from working at maximum power without damaging the speaker unit. The input channel delay 13 can adjust the distance difference between the full-range speaker and the subwoofer, and the distance difference between the main sound column and the supplementary sound speaker. The output delay can adjust the distance difference between the treble, midrange and bass of the electronic crossover speaker. The input and output channel muting can be measured independently for each channel in the debugging system; the output channel can set the target frequency response curve through the user, and then select the speaker frequency range to be processed, and how many bands of PEQ equalization to use for optimization.

[0034] The data storage module is a DSP audio signal module that independently saves the processed data presets of the audio signal of each channel and saves the engineering files of the entire machine.

[0035] The user computer operation interface provides users with adjustment control of each channel function, and the debugging data can be saved in the computer local file and machine memory.

[0036] Although the embodiments of the utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the scope of protection of the utility model.

Claims

1. An audio processor capable of presetting FIR filter speaker data, characterized in that: It includes a box, a signal transmission module, a DSP audio signal processing module, a control interface module and a power supply module. The signal transmission module is fixedly connected to the upper end of the box, the control interface module is fixedly connected to the lower end of the box, the power supply module is fixedly connected to the right side of the box, and the audio processor also includes an IIR filter module and a FIR filter module.

2. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The audio processor is also provided with panel buttons and an LCD display screen module, which include an input channel mute button, an output channel mute button and an audio processor function button, and the LCD display screen module displays the working data and the status of the connection control module.

3. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The IIR filter module includes high-pass and low-pass response filters, and the response filters are arranged into eight groups of orders.

4. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The FIR filter module includes window type, tap number, high-pass filter, low-pass filter, and band-pass filter.

5. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The signal transmission module comprises an audio input interface and an audio output interface. The audio input interface is provided with four groups, and the audio output interface is provided with eight groups. The audio input interfaces are respectively connected to the audio output ports in this way.

6. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The DSP audio signal processing module includes input channel noise gate, input and output channel equalization, input channel compression, input and output channel polarity, output channel limiting, input and output channel delay, and input and output channel mute.

7. The audio processor capable of presetting FIR filter sound box data according to claim 6, characterized in that: The output channel may have a target frequency response curve set by the user.

8. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The control interface module includes a USB control interface, an RS485 control interface and an Ethernet control interface.

9. The audio processor capable of presetting FIR filter sound box data according to claim 1, characterized in that: The power supply module includes a DSP working power supply, a control interface working power supply and a panel LCD display working power supply.

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