High-power battery mobile sound system

Abstract

The utility model discloses a high-power battery mobile sound system which comprises an ADC analog-to-digital conversion circuit, a pre-stage DSP signal processing circuit, a DCA digital-to-analog conversion circuit and a post-stage power amplifier circuit. An audio signal is converted into an I2S signal through the ADC analog-to-digital conversion circuit, the I2S signal is processed by the pre-stage DSP signal processing circuit, the I2S signal is output to the DCA digital-to-analog conversion circuit and then is output to the post-stage power amplifier circuit, and the post-stage power amplifier circuit drives a load loudspeaker to play after being amplified. An audio signal is subjected to EQ, volume, corresponding output frequency division and other processing through pre-stage DSP signal processing, the processed pre-stage audio signal is transmitted to a post-stage power amplifier circuit, and a power supply voltage is boosted to a design value through a battery power supply inverter circuit and is transmitted to the power amplifier circuit to drive a loudspeaker horn. The loudspeaker of the sound box emits corresponding power, and can be used in multiple scenes such as KTV performance, outdoor singing, musical instrument playing and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile audio, in particular to a high-power battery mobile audio system. Background Art

[0002] As an audio-visual entertainment device, mobile audio is widely popular among the public because of its advantages such as easy to carry, convenient to use and low price. This type of mobile audio equipment is currently mostly used in scenes such as national karaoke, outdoor singing activities, instrument playing, square song and dance performances and live broadcasts. When using mobile audio equipment, the user is often a little far away from the audio, and the external environmental factors are relatively complex, which cannot meet the outdoor and other use scenarios to a greater extent. The existing mobile audio solutions lack diversified design and their audio signal processing is poor, and cannot meet the use requirements of multiple scenes. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a high-power battery mobile audio system that can be used in multiple scenarios.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a high-power battery mobile sound system, connected to the load speaker of the mobile sound box and the power supply battery, including an ADC analog-to-digital conversion circuit, a front-stage DSP signal processing circuit, a DCA digital-to-analog conversion circuit, and a rear-stage power amplifier circuit;

[0005] The audio signal is converted into an I2S signal by the ADC analog-to-digital conversion circuit and then processed by the front-stage DSP signal processing circuit. The I2S signal is output to the DCA digital-to-analog conversion circuit and then output to the rear-stage power amplifier circuit. The rear-stage power amplifier circuit amplifies and drives the load speaker to play.

[0006] In an optional embodiment, it also includes a battery voltage inverter circuit and a constant current / constant voltage charging circuit, wherein the battery voltage inverter circuit includes a BOOST boost chip, wherein the BOOST boost chip boosts the voltage of the mobile speaker power supply battery to a designed power supply voltage value, and the battery voltage inverter boost circuit boosts the voltage to the designed power supply voltage value to supply power to the subsequent power amplifier circuit;

[0007] The constant current / constant voltage charging circuit is powered by an external adapter, and a constant current / constant voltage charging chip built into the constant current / constant voltage charging circuit outputs a designed power supply voltage value to charge the power supply battery.

[0008] In an optional embodiment, the front-stage DSP signal processing circuit includes a Bluetooth circuit, and the Bluetooth circuit includes an AC6951C chip, and the AC6951C chip is connected to the DIN20-DSP, GPIO and DOUT20-DSP / GPIO ports of the HC6288 chip of the DSP signal processing circuit through the sampling frequency 48KHz digital I2S output DIN-BT / GPIO port and DOUT-BT / GPIO port;

[0009] The DSP signal processing circuit performs corresponding audio signal processing on the output digital audio signal of the Bluetooth circuit.

[0010] In an optional embodiment, a PCBA control board or an infrared remote control receiving circuit is integrated on the AC6951C chip connection panel, and the front-stage DSP signal processing circuit, the ADC analog-to-digital conversion circuit, the constant current / constant voltage charging circuit and the post-stage power amplifier circuit are controlled by control instructions of the AC6951C chip.

[0011] In an optional embodiment, the ADC analog-to-digital conversion circuit performs microphone channel input circuit, instrument channel input circuit, and AUX audio channel input circuit through an AKM chip, and the corresponding circuits are connected to the four inputs of the AKM chip.

[0012] In an optional embodiment, the AKM chip is connected to the DIN80 and DIN81 interfaces of the DSP signal processing circuit HC6288 chip via a 48KHz digital I2S output, and the 48KHz digital audio signal is transmitted to the front-stage DSP signal processing circuit for effect processing.

[0013] In an optional embodiment, the DCA digital-to-analog conversion circuit converts the 48KHz digital audio signal of the pre-stage DSP signal processing circuit from a digital to an analog circuit through three GC4344 chips, and the three GC4344 chips respectively output high-frequency signals, intermediate-frequency signals, low-frequency signals and headphone monitoring signals.

[0014] In an optional embodiment, the high frequency signal is 2KHz-20KHz, the intermediate frequency signal is 500Hz-2KHz, and the low frequency signal is 20Hz-500Hz.

[0015] In an optional embodiment, it also includes a battery voltage detection circuit, a forced shutdown circuit, and a charging indication circuit. The battery voltage detection circuit, the forced shutdown circuit, and the charging indication circuit are connected to the GPIO port of the AC6951C chip. When the AC6951C chip detects corresponding circuit design parameters, the AC6951C chip outputs corresponding control instructions.

[0016] The high-power battery mobile audio system of the utility model has the following beneficial effects:

[0017] Through the battery voltage inverter circuit, constant current / constant voltage charging circuit, ADC analog-to-digital conversion circuit, front-stage DSP signal processing circuit, DCA digital-to-analog conversion circuit, and post-stage power amplifier circuit, the front-stage DSP signal processing performs EQ, volume, and corresponding output frequency division on the audio signal, and the microphone channel and instrument channel perform EQ, echo, reverberation, volume and other effect processing. The processed front-stage audio signal is transmitted to the post-stage power amplifier circuit, and the battery-powered inverter circuit is used to boost the power supply voltage to the designed value to drive the speaker to the power amplifier circuit, so that the speaker emits the corresponding power to meet the use of KTV performances, outdoor singing, instrument playing, square song and dance performances, live broadcasts and other scenarios.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 This is a principle block diagram of a high-power battery mobile audio system in an embodiment of the utility model;

[0021] Figure 2 1 is a circuit diagram of a DAC digital-to-analog conversion circuit in an embodiment of the utility model;

[0022] Figure 3 It is a circuit diagram of an ADC analog-to-digital conversion circuit in an embodiment of the utility model;

[0023] Figure 4 It is a circuit diagram of AUX audio input in an embodiment of the utility model;

[0024] Figure 5 is a circuit diagram of a musical instrument input in an embodiment of the utility model;

[0025] Figure 6 It is a circuit diagram of a wireless microphone and a wired microphone input in an embodiment of the utility model;

[0026] Figure 7 It is a circuit diagram of the AC6951C chip in the embodiment of the utility model;

[0027] Figure 8It is a circuit diagram of the HC6288 chip in the embodiment of the utility model. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Please refer to Figures 1 to 8 As shown, a high-power battery mobile audio system provided by an embodiment of the utility model is connected to a load speaker of a mobile sound box and a power supply battery, including an ADC analog-to-digital conversion circuit, a front-stage DSP signal processing circuit, a DCA digital-to-analog conversion circuit, and a rear-stage power amplifier circuit;

[0031] The audio signal is converted into an I2S signal by the ADC analog-to-digital conversion circuit and then processed by the front-stage DSP signal processing circuit. The I2S signal is output to the DCA digital-to-analog conversion circuit and then output to the rear-stage power amplifier circuit. The rear-stage power amplifier circuit amplifies the signal and drives the load speaker to play the signal.

[0032] In this embodiment, the audio signal is converted and amplified before input processing to improve the use effect of the speaker.

[0033] It also includes a battery voltage inverter circuit and a constant current / constant voltage charging circuit. The battery voltage inverter circuit includes a BOOST boost chip. The BOOST boost chip boosts the voltage of the battery that powers the mobile speaker to a designed power supply voltage value. The battery voltage inverter boost circuit boosts the voltage to the designed power supply voltage value to supply power to the subsequent power amplifier circuit.

[0034] The constant current / constant voltage charging circuit is powered by an external adapter, and the constant current / constant voltage charging chip built into the constant current / constant voltage charging circuit outputs a designed power supply voltage value to charge the power supply battery.

[0035] Further, the front-stage DSP signal processing circuit includes a Bluetooth circuit, and the Bluetooth circuit includes an AC6951C chip, and the AC6951C chip is connected to the DIN20-DSP, GPIO and DOUT20-DSP / GPIO ports of the HC6288 chip of the DSP signal processing circuit through the sampling frequency 48KHz digital I2S output DIN-BT / GPIO port and DOUT-BT / GPIO port;

[0036] The DSP signal processing circuit performs corresponding audio signal processing on the output digital audio signal of the Bluetooth circuit.

[0037] The AC6951C chip connection panel integrates a PCBA control board or an infrared remote controller, and controls the front-stage DSP signal processing circuit, ADC analog-to-digital conversion circuit, constant current / constant voltage charging circuit, and the back-stage power amplifier circuit through the control instructions of the AC6951C chip.

[0038] The ADC analog-to-digital conversion circuit is used for microphone channel input circuit, instrument channel input circuit, and AUX audio channel input circuit through the AKM chip, and the corresponding circuits are connected to the four inputs of the AKM chip.

[0039] The AKM chip is connected to the DIN80 and DIN81 interfaces of the DSP signal processing circuit HC6288 chip through the 48KHz digital I2S output of the sampling frequency. The 48KHz digital audio signal is transmitted to the pre-stage DSP signal processing circuit for effect processing.

[0040] The DCA digital-to-analog conversion circuit converts the 48KHz digital audio signal of the pre-stage DSP signal processing circuit from digital to analog circuit through three GC4344 chips. The three GC4344 chips output high-frequency signals, intermediate-frequency signals, low-frequency signals and headphone monitoring signals respectively.

[0041] Optionally, the high frequency signal is 2KHz-20KHz, the intermediate frequency signal is 500Hz-2KHz, and the low frequency signal is 20Hz-500Hz.

[0042] It also includes a battery voltage detection circuit, a forced shutdown circuit, and a charging indication circuit. The battery voltage detection circuit, the forced shutdown circuit, and the charging indication circuit are connected to the GPIO port of the AC6951C chip. When the AC6951C chip detects the corresponding design parameters of the circuit, the AC6951C chip outputs the corresponding control instructions.

[0043] Through the battery voltage inverter circuit, constant current / constant voltage charging circuit, ADC analog-to-digital conversion circuit, front-stage DSP signal processing circuit, DCA digital-to-analog conversion circuit, and post-stage power amplifier circuit, the front-stage DSP signal processing performs EQ, volume, and corresponding output frequency division on the audio signal, and the microphone channel and instrument channel perform EQ, echo, reverberation, volume and other effect processing. The processed front-stage audio signal is transmitted to the post-stage power amplifier circuit, and the battery-powered inverter circuit is used to boost the power supply voltage to the designed value to drive the speaker to the power amplifier circuit, so that the speaker emits the corresponding power to meet the use of KTV performances, outdoor singing, instrument playing, square song and dance performances, live broadcasts and other scenarios.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-power battery mobile sound system, connecting the load speaker of the mobile sound box and the power supply battery, It is characterized in that It includes ADC analog-to-digital conversion circuit, front-stage DSP signal processing circuit, DCA digital-to-analog conversion circuit, and back-stage power amplifier circuit; The audio signal is converted into an I2S signal by the ADC analog-to-digital conversion circuit and then processed by the front-stage DSP signal processing circuit. The I2S signal is output to the DCA digital-to-analog conversion circuit and then output to the rear-stage power amplifier circuit. The rear-stage power amplifier circuit amplifies and drives the load speaker to play.

2. The high-power battery mobile audio system according to claim 1, It is characterized in that It also includes a battery voltage inverter circuit and a constant current / constant voltage charging circuit, wherein the battery voltage inverter circuit includes a BOOST boost chip, wherein the BOOST boost chip boosts the voltage of the mobile speaker power supply battery to a designed power supply voltage value, and the battery voltage inverter boost circuit boosts the voltage to the designed power supply voltage value to supply power to the subsequent power amplifier circuit; The constant current / constant voltage charging circuit is powered by an external adapter, and a constant current / constant voltage charging chip built into the constant current / constant voltage charging circuit outputs a designed power supply voltage value to charge the power supply battery.

3. The high-power battery mobile audio system according to claim 2, It is characterized in that The front-stage DSP signal processing circuit includes a Bluetooth circuit, and the Bluetooth circuit includes an AC6951C chip. The AC6951C chip is connected to the DIN20-DSP, GPIO and DOUT20-DSP / GPIO ports of the HC6288 chip of the DSP signal processing circuit through a sampling frequency 48KHz digital I2S output DIN-BT / GPIO port and a DOUT-BT / GPIO port; The DSP signal processing circuit performs corresponding audio signal processing on the output digital audio signal of the Bluetooth circuit.

4. The high-power battery mobile audio system according to claim 3, It is characterized in that The AC6951C chip connection panel integrates a PCBA control board or an infrared remote control receiving circuit, and controls the front-stage DSP signal processing circuit, the ADC analog-to-digital conversion circuit, the constant current / constant voltage charging circuit, and the rear-stage power amplifier circuit through control instructions of the AC6951C chip.

5. The high-power battery mobile audio system according to claim 1, It is characterized in that The ADC analog-to-digital conversion circuit performs microphone channel input circuit, instrument channel input circuit, and AUX audio channel input circuit through the AKM chip, and the corresponding circuits are connected to the four inputs of the AKM chip.

6. The high-power battery-powered mobile audio system according to claim 5, It is characterized in that The AKM chip is connected to the DIN80 and DIN81 interfaces of the DSP signal processing circuit HC6288 chip via a 48KHz digital I2S output, and the 48KHz digital audio signal is transmitted to the pre-stage DSP signal processing circuit for effect processing.

7. The high-power battery-powered mobile audio system according to claim 1, It is characterized in that The DCA digital-to-analog conversion circuit converts the 48KHz digital audio signal of the pre-stage DSP signal processing circuit from a digital to an analog circuit through three GC4344 chips. The three GC4344 chips output high-frequency signals, intermediate-frequency signals, low-frequency signals and headphone monitoring signals respectively.

8. The high-power battery-powered mobile audio system according to claim 7, It is characterized in that The high frequency signal is 2KHz-20KHz, the intermediate frequency signal is 500Hz-2KHz, and the low frequency signal is 20Hz-500Hz.

9. The high-power battery-powered mobile audio system according to claim 3, It is characterized in that It also includes a battery voltage detection circuit, a forced shutdown circuit, and a charging indication circuit. The battery voltage detection circuit, the forced shutdown circuit, and the charging indication circuit are connected to the GPIO port of the AC6951C chip. When the AC6951C chip detects corresponding circuit design parameters, the AC6951C chip outputs corresponding control instructions.

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