Acoustic signal processing system and processing method thereof
By introducing a power supply state detection unit into the audio signal processing system, automatically identifying the power supply mode and switching the power consumption state, the problem of large power consumption of the existing audio processing system is solved, and the low power consumption and convenient layout of intelligent audio equipment is realized.
Patent Information
- Application Number
- CN202411390110.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2024-12-27
AI Technical Summary
The existing audio processing system consumes a large power consumption, making it difficult to meet the portability and low power consumption needs of smart home audio equipment.
Design an audio signal processing system, including a main control unit, a sound effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply state detection unit, through power supply state detection Automatically identify the power supply mode, enter low power mode when the battery is powered, and enter full power mode when the power is powered.
It realizes automatic power consumption pattern recognition and switching of the audio processing system, meets the convenient layout and low-power use of smart audio equipment, and optimizes the power consumption performance of the system.
Smart Images
Figure CN119211809A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of audio equipment, and in particular to an audio signal processing system and a processing method thereof. Background Art
[0002] The audio processing system can improve the sound quality by processing the audio signal through sound effects and sound field. The application of the audio processing system in the field of home audio has a very broad market prospect. The audio processor is an important sound effect adjustment device in the audio system. In professional mixing consoles and audio peripheral equipment, the audio processor is an indispensable device. The audio processor performs various processing and modifications on the audio signal to beautify the tone and protect the subsequent equipment, and enhance the expressiveness and appeal of the music. High-quality audio processors can greatly improve the music listening effect and make the audience feel immersive.
[0003] Traditional audio processing systems are usually implemented in analog circuits, which can only provide some relatively simple sound adjustment functions, such as using graphic equalizers to attenuate or enhance audio signals of different frequencies, and using spring delays and BBD delays to achieve sound delay effects. The analog method uses discrete components, resulting in high cost, large size, and environmental sensitivity of the entire system; at the same time, it also has the disadvantages of low accuracy, poor flexibility, and difficulty in upgrading.
[0004] Nowadays, with the maturity of digital technology and the continuous development of digital signal processing technology, people can easily realize audio signal processing in the digital domain through digital signal processing. Digital audio processing is realized through algorithms, and different algorithms achieve different effects; therefore, multiple audio processing algorithms can be integrated on one platform, and different processing effects can be achieved by selecting different algorithms. At the same time, digital circuits have the characteristics of high integration and few peripheral circuits. In this way, the digital audio processing system is not only smaller in size, lower in cost, and easy to upgrade, but also can overcome the shortcomings of low precision and poor noise resistance of analog methods, and can obtain high-quality music effects. In addition, digital audio processors can flexibly realize some special audio signal processing, such as noise suppression and dynamic range control, and can also create sound effects that do not exist in nature, such as space sound.
[0005] Based on this, the existing invention patent CN1243350C discloses an audio processing unit of an integrated audio reproduction system, wherein the integrated audio reproduction system includes an audio data recovery device for recovering audio data from an audio data source (2, 3, 4), a sound generating device (14, 15) and a user input device for a user to input audio processing control data, and the audio processing unit includes a digital processor (1) provided on an integrated circuit, the digital processor is connected to the data recovery device, the sound generating device and the user selection device and is arranged to receive input audio data from the data recovery device, process the input audio data in a digital range according to the audio processing control data to generate an audio output signal, provide the audio output signal to the sound generating device, and control at least one motor function of the audio recovery device.
[0006] However, the audio processing unit of the integrated audio reproduction system disclosed above still has the technical problem of high power consumption. Specifically, with the improvement of people's living standards, consumers have higher and higher requirements for the intelligent functions of home audio systems; at the same time, the easy-to-place setting mode has gradually become an important selling point of home audio products. Compared with traditional home audio, smart speakers need to be placed in the living room, dining table, or even bedside as needed; this requires that smart speakers must get rid of the shackles of wired power supply and be placed on demand in a portable manner. Due to its easy layout, the space inside this type of audio product is small, but it often needs to accommodate components such as control modules, battery modules, audio processors, and speaker units at the same time. Professional audio processing systems can greatly improve the sound quality by performing sound effects and sound field processing on audio signals. However, professional audio processing systems often use analog speakers, which results in high system power consumption and poor anti-interference capabilities. Emerging all-digital speakers are driven by digital signals and do not require digital-to-analog conversion, amplification, and filtering. Therefore, they are smaller in size and power consumption, and have stronger anti-interference capabilities. However, there are currently few energy-saving home audio processing products on the market that are specifically developed for all-digital speakers. Summary of the invention
[0007] Based on this, it is necessary to provide an audio signal processing system and a processing method thereof to solve the technical problem of how to optimize the power consumption of the audio processing system.
[0008] A sound signal processing system comprises: a main control unit, a sound effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply status detection unit; the main control unit is control-connected to the sound effect processing unit, the audio signal input unit is connected to an external sound host, and the audio signal output unit is connected to an external speaker; the sound effect processing unit is respectively connected to the audio signal input unit and the audio signal output unit, the human-computer interaction unit is connected to the main control unit, and the communication unit is respectively connected to an external portable intelligent terminal and the main control unit; the main control unit is control-connected to the system power supply unit, the power supply status detection unit is connected to the main control unit, and the power supply status detection unit monitors the power supply form of the main control unit and adjusts the power output status of the system power supply unit.
[0009] An audio signal processing method using the above-mentioned audio signal processing system, the specific process of which is as follows: When the system power supply unit does not supply power, the audio signal processing system does not start, and each unit is in a stopped state; when the power supply state detection unit detects BU ON and ACC OFF, the audio signal processing system is powered on and starts, and enters a low power consumption state; in the low power consumption state, the maximum output power of the external speaker controlled by the audio output unit is not higher than half of the rated power, and when the audio output unit detects the ACC ON signal, the audio signal processing system enters a full-speed operation state, and the main control unit notifies the audio output unit to control the maximum output power of the external speaker to reach the rated power; in the full-speed operation state, after the power supply state detection unit detects the ACC OFF signal, the system power supply unit starts a 10s abnormal insurance timer, and at the same time, the main control unit detects whether each unit has stopped working. If 10s times out or it is detected that each unit has stopped working, the audio signal processing system is controlled to enter a low power consumption state.
[0010] Specifically, the external power transformer conversion module converts 220V AC power into 12V input power; the system power supply unit then converts 12V into B / U 3.3V to power the microprocessor and external memory of the main control unit; and PON and ILLON are used as the output control signals of the main controller. Under the action of PON and ILLON, the main controller can control the power supply output of other units.
[0011] Specifically, P ON controls the output of D 3.3V / D 1.1V / A 9V / A 5V / D 5V, which is used to power the audio processing unit and the human-computer interaction unit. ILL ON controls the output of B / L 9V, which is used to power the backlight of the LCD of the human-computer interaction unit.
[0012] Specifically, the B / U DET and the ACC DET are connected to the main control unit, and when the B / U power supply or the ACC signal changes state, the audio signal processing system implements a preset state transition.
[0013] Specifically, when the voltage of the system power supply unit is in a stable state, B / U DET and ACC DET are at a low level.
[0014] Specifically, when the system power supply unit sends an ACC ON signal, ACC DET is at a high level.
[0015] Specifically, when the system power supply unit stops B / U I2V power supply, B / U DET is at a high level; and once the power supply status detection unit detects a rising edge of B / U DET, it indicates that the system power supply unit stops B / U I2V power supply.
[0016] In summary, the audio signal processing system of the present invention is respectively provided with a main control unit, a sound effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply status detection unit; the main control unit is control-connected to the sound effect processing unit, the audio signal input unit is connected to an external audio host, and the audio signal output unit is connected to an external speaker; the sound effect processing unit is respectively connected to the audio signal input unit and the audio signal output unit, the human-computer interaction unit is connected to the main control unit, and the communication unit is respectively connected to an external portable intelligent terminal and the main control unit; the main control unit is control-connected to the system power supply unit, the power supply status detection unit is connected to the main control unit, and the power supply status detection unit monitors the power supply form of the main control unit and adjusts the power output status of the system power supply unit. Furthermore, the present invention further discloses an audio signal processing method based on the aforementioned audio signal processing system. Based on the system and control method, the power supply status detection unit can detect the power supply status of the entire system of the present invention. When the system is powered on, it can automatically detect whether it is currently powered by a battery or a power supply, that is, it can identify and switch the B / U power supply or ACC power supply mode of the system, and control the entire system to enter a low power consumption mode when it is powered on by B / U; and control the entire system to enter a full power mode when it is powered on by ACC. It can be seen that the audio signal processing system proposed by the present invention can automatically identify and switch the power consumption mode to make it meet the low power consumption requirements of the convenient deployment of devices such as smart speakers, thereby solving the technical problem of how to optimize the power consumption of the audio processing system. Therefore, the audio signal processing system of the present invention solves the technical problem of how to optimize the power consumption of the audio processing system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a structural block diagram of the audio signal processing system of the present invention; Figure 2 This is a schematic diagram of the hardware design of the audio signal processing system of the present invention; Figure 3 A control schematic diagram of a system power supply unit of the audio signal processing method of the present invention; Figure 4 It is a schematic diagram of the B / U power supply detection circuit of the audio signal processing method of the present invention; Figure 5 It is a schematic diagram of the ACC power supply detection circuit of the audio signal processing method of the present invention; Figure 6 The figure is a schematic diagram of the power consumption control flow of the audio signal processing method of the present invention. DETAILED DESCRIPTION
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0024] See also Figure 1 The audio signal processing system of the present invention includes: a main control unit, an audio effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply status detection unit; the main control unit is control-connected to the audio effect processing unit, the audio signal input unit is connected to an external audio host, and the audio signal output unit is connected to an external speaker; the audio effect processing unit is respectively connected to the audio signal input unit and the audio signal output unit, the human-computer interaction unit is connected to the main control unit, and the communication unit is respectively connected to an external portable intelligent terminal and the main control unit; the main control unit is control-connected to the system power supply unit, the power supply status detection unit is connected to the main control unit, and the power supply status detection unit monitors the power supply form of the main control unit and adjusts the power output state of the system power supply unit.
[0025] Specifically, in the audio signal processing system disclosed by the present invention, the main control unit mainly completes the coordination and control function of each unit, which mainly includes input and output channel control, external audio reception and forwarding, portable intelligent terminal configuration information reception and forwarding, human-computer interaction data processing, power management and other operations. Therefore, the main control unit is mainly composed of MCU and its necessary peripheral circuits. Further, the sound effect processing unit mainly completes the real-time and fast sound effect processing function of the input audio signal. As the core unit of the entire audio processing system, it is mainly composed of DSP and necessary peripheral circuits. In addition, the audio signal input unit mainly completes the function of collecting input sound signals. The audio signal input unit has a dual-channel analog audio signal input and a dual-channel digital audio signal input. Similarly, the audio signal output unit mainly completes the output function of the audio signal. The audio signal output unit has a dual-channel analog audio signal output and a multi-channel digital audio signal output; thus, it can cooperate with different numbers of external speakers to build different surround sound environments. Further, for the human-computer interaction unit, it mainly completes the functions of system interface display and control information input. The communication unit mainly completes the data communication function between the system and the external smart device, and the smart device can tune the system or transmit the audio transmitted by the data line, such as USB cable. The system power supply unit can provide working voltage for other units, and the voltage output of the system power supply unit can be controlled by the main control unit.
[0026] More specifically, the power supply status detection unit mainly completes the function of detecting the power supply status of the entire system of the present invention. When the system is in power supply state, it can automatically detect whether it is currently powered by a battery or a power supply, that is, it can identify and switch the B / U power supply or ACC power supply mode of the system, and control the entire system to enter a low-power mode when it is powered by B / U; and control the entire system to enter a full-power mode when it is powered by ACC. It can be seen that the audio signal processing system proposed by the present invention can automatically identify and switch the power consumption mode to make it meet the low-power consumption of the convenient deployment of devices such as smart audio, thereby solving the technical problem of how to optimize the power consumption of the audio processing system.
[0027] For further information, please refer to Figure 2 ,exist Figure 2The present invention further discloses a design embodiment of the overall hardware of an audio signal processing system, which can adopt a modular design. The main control unit is based on the MCU, which is responsible for the scheduling of system tasks and the transmission and management of various configuration data; the sound effect processing unit is based on the DSP, which completes functions such as volume adjustment, equalization, delay and frequency division; the human-computer interaction unit is responsible for related information display and user control information input. Therefore, this modular design can make the system structure simple, and each module is independent of each other, ensuring the stability of the system; at the same time, it can make the system easy to debug and facilitate the subsequent maintenance and upgrade processing.
[0028] Furthermore, in the audio signal processing system disclosed in the present invention, the system power supply unit can convert the 220V power supply into a 12V voltage by a converter such as a power plug module, and then provide it to each working unit through the system power supply unit; or the system power supply unit can provide a 3.3V power supply voltage by a battery module such as a lithium battery pre-built in. Specifically, the main control unit is the control center of the entire system. When the system needs to enter a low-power state, the main control unit saves the on-site configuration and controls the power supply output of other units to be turned off; then, the main controller turns off various peripherals and enters a standby state. The main controller responds to the wake-up signal at any time, and after receiving the wake-up signal, it turns on the power supply output of other units, and the system works normally.
[0029] Based on this, please continue to refer to Figure 3 The present invention discloses a scheme for a system power supply unit of an audio signal processing system, such as Figure 3 As shown, the direction of the arrow indicates the conversion from the previous power supply voltage to the next power supply voltage. Specifically, the external power transformer conversion module converts the 220V mains power into a 12V input power supply; the system power supply unit then converts the 12V into B / U 3.3V, and then powers the microprocessor and external memory of the main control unit. Among them, PON and ILLON are control signals output by the main controller. Under the action of PON and ILLON, the main controller can control the power supply output of other units. More specifically, PON controls the output of D 3.3V / D 1.1V / A 9V / A 5V / D 5V. This control is mainly used for the power supply of the audio processing unit and the human-computer interaction unit. ILLON controls the output of B / L 9V, which is used to power the backlight of the LCD of the human-computer interaction unit.
[0030] Further, in the technical solution disclosed by the audio signal processing system of the present invention, the main power supply is provided by the system power supply unit, that is, the B / U 12V power supply is provided; and the ACC gear can be defined as a module that does not pass through the storage power supply such as lithium battery to also supply power to some units of the audio signal processing system; thus, a low-power processing method of the audio signal processing system can be defined, specifically: only when the power supply status detection unit detects that the B / U 12V is normally powered and detects the ACC ON signal, the audio signal processing system will enter normal operation; and when the power supply status detection unit detects the ACC OFF signal, the audio signal processing system will enter a low-power operation state; and when the B / U 12V is powered off, the large-capacity capacitor at the input end of the system power supply unit can also urgently provide power to enable the main control unit to continue to work for 30-40us, so that the main control unit can save the preset parameters within this time period. Therefore, the power supply status detection unit needs to detect the signal input by the storage battery and the power transformer in real time to determine the working state of the impression signal processing system.
[0031] For this, please continue to read Figure 4 and Figure 5 The present invention discloses two specific embodiments of the design circuit of the power supply status detection unit, one of which can be used to detect the B / U power supply, and the other can be used to detect the ACC signal. Specifically, Figure 4 A specific embodiment of a B / U power supply detection circuit, Figure 5 is a specific embodiment of the ACC signal detection circuit; Figure 4 and Figure 5 As shown, B / U DET and ACC DET are connected to the main control unit. When the B / U power supply or ACC signal changes state, the corresponding state migration is completed in the software of the audio signal processing system. When the voltage is in a stable state, B / U DET and ACC DET are low level; when the system power supply unit sends an ACC ON signal, ACC DET is high level; when the storage battery of the system power supply unit stops the B / U I2V power supply, B / U DET is high level; and once the power supply state detection unit detects the rising edge of B / U DET, it indicates that the storage battery of the system power supply unit has stopped the B / U I2V power supply.
[0032] Furthermore, in order to cater to the aforementioned power consumption switching method of the audio signal processing system, the present invention further proposes an audio signal processing method, which is mainly used for power management; specifically, Figure 6 As shown. Since the system power supply unit is mainly responsible for the power management of the audio signal processing system, combined with Figure 6 It can be seen that the current power supply signals of intelligent audio devices include ACC and BU. Only after BU is powered and receives the ACC ON signal, the audio signal processing system will run at full speed. Corresponding to the change of ACC state, i.e. ACC OFF→ACC ON or ACC ON→ACC OFF and the change of BU state, i.e. BU OFF→BU ON or BU ON→BU OFF, the audio signal processing system should be in different working states. Therefore, it can be defined that the audio signal processing system has four main working states, namely: stop state, low power consumption state, full speed running state and waiting state.
[0033] Based on this, the present invention proposes a method flow for autonomously controlling power consumption in an audio signal processing method: when the system power supply unit does not supply power, the audio signal processing system does not start, and each unit is in a stopped state; when the power supply state detection unit detects BU ON and ACC OFF, the audio signal processing system is powered on and starts, and enters a low power consumption state; in the low power consumption state, the maximum output power of the external speaker controlled by the audio output unit is not higher than half of the rated power, and when the audio output unit detects the ACC ON signal, the audio signal processing system enters a full-speed operation state, and the main control unit notifies the audio output unit to control the maximum output power of the external speaker to reach the rated power; in the full-speed operation state, after the power supply state detection unit detects the ACC OFF signal, the system power supply unit starts to start a 10s abnormal insurance timer, and at the same time, the main control unit detects whether each unit has stopped working. If 10s times out or it is detected that each unit has stopped working, the audio signal processing system is controlled to enter a low power consumption state.
[0034] In summary, the audio signal processing system of the present invention is respectively provided with a main control unit, a sound effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply status detection unit; the main control unit is control-connected to the sound effect processing unit, the audio signal input unit is connected to an external audio host, and the audio signal output unit is connected to an external speaker; the sound effect processing unit is respectively connected to the audio signal input unit and the audio signal output unit, the human-computer interaction unit is connected to the main control unit, and the communication unit is respectively connected to an external portable intelligent terminal and the main control unit; the main control unit is control-connected to the system power supply unit, the power supply status detection unit is connected to the main control unit, and the power supply status detection unit monitors the power supply form of the main control unit and adjusts the power output status of the system power supply unit. Furthermore, the present invention further discloses an audio signal processing method based on the aforementioned audio signal processing system. Based on the system and control method, the power supply status detection unit can detect the power supply status of the entire system of the present invention. When the system is powered on, it can automatically detect whether it is currently powered by a battery or a power supply, that is, it can identify and switch the B / U power supply or ACC power supply mode of the system, and control the entire system to enter a low power consumption mode when it is powered on by B / U; and control the entire system to enter a full power mode when it is powered on by ACC. It can be seen that the audio signal processing system proposed by the present invention can automatically identify and switch the power consumption mode to make it meet the low power consumption requirements of the convenient deployment of devices such as smart speakers, thereby solving the technical problem of how to optimize the power consumption of the audio processing system. Therefore, the audio signal processing system of the present invention solves the technical problem of how to optimize the power consumption of the audio processing system.
[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.
Claims
1. An audio signal processing system, characterized in that: It includes: A main control unit, a sound effect processing unit, an audio signal input unit, an audio signal output unit, a human-computer interaction unit, a communication unit, a system power supply unit and a power supply status detection unit; the main control unit is control-connected to the sound effect processing unit, the audio signal input unit is connected to an external audio host, and the audio signal output unit is connected to an external speaker; the sound effect processing unit is respectively connected to the audio signal input unit and the audio signal output unit, the human-computer interaction unit is connected to the main control unit, and the communication unit is respectively connected to an external portable intelligent terminal and the main control unit; the main control unit is control-connected to the system power supply unit, the power supply status detection unit is connected to the main control unit, and the power supply status detection unit monitors the power supply form of the main control unit and adjusts the power output status of the system power supply unit.
2. A method for processing an acoustic signal using the acoustic signal processing system according to claim 1, characterized in that: The specific process is: When the system power supply unit does not supply power, the audio signal processing system does not start, and each unit is in a stopped state; when the power supply state detection unit detects BU ON and ACC OFF, the audio signal processing system is powered on and starts, and enters a low power consumption state; in the low power consumption state, the maximum output power of the external speaker controlled by the audio output unit is not higher than half of the rated power, and when the audio output unit detects the ACC ON signal, the audio signal processing system enters a full-speed operation state, and the main control unit notifies the audio output unit to control the maximum output power of the external speaker to reach the rated power; in the full-speed operation state, after the power supply state detection unit detects the ACC OFF signal, the system power supply unit starts a 10s abnormal insurance timer, and at the same time, the main control unit detects whether each unit has stopped working. If 10s times out or it is detected that each unit has stopped working, the audio signal processing system is controlled to enter a low power consumption state.
3. The sound signal processing method according to claim 2, characterized in that: The external power transformer conversion module converts 220V mains power into 12V input power; the system power supply unit then converts 12V into B / U 3.3V to power the microprocessor and external memory of the main control unit; and PON and ILLON are the output control signals of the main controller. Under the action of PON and ILLON, the main controller can control the power supply output of other units.
4. The method for processing an acoustic signal according to claim 3, wherein: P ON controls the output of D 3.3V / D 1.1V / A9V / A 5V / D 5V, which is used to power the audio processing unit and the human-computer interaction unit. ILLON controls the output of B / L 9V, which is used to power the backlight of the LCD of the human-computer interaction unit.
5. The method for processing an acoustic signal according to claim 2, wherein: B / U DET and ACC DET are connected to the main control unit. When the B / U power supply or ACC signal changes state, the audio signal processing system implements a preset state transition.
6. The sound signal processing method according to claim 5, characterized in that: When the voltage of the system power supply unit is in a stable state, B / U DET and ACC DET are at a low level.
7. The method for processing an acoustic signal according to claim 5, wherein: When the system power supply unit sends an ACCON signal, ACC DET is at a high level.
8. The method for processing an acoustic signal according to claim 5, wherein: When the system power supply unit stops B / U I2V power supply, B / U DET is at a high level; and once the power supply status detection unit detects a rising edge of B / U DET, it indicates that the system power supply unit stops B / U I2V power supply.