Method, system for adjusting sound distortion and vehicle-mounted multimedia system

Abstract

The application provides a sound distortion adjusting method and system and a vehicle-mounted multimedia system, and comprises the following steps: obtaining a detection signal of a power amplifier device; wherein the detection signal is a signal obtained by the power amplifier device in distortion detection on received audio; if it is determined that the audio is in a distortion state based on the detection signal, adjusting the volume of the audio based on a preset pace, and outputting the adjusted audio to the power amplifier device. The application avoids the distortion phenomenon when the volume is large, and improves the user experience.

Description

Technical Field

[0001] This invention relates to the field of signal processing technology, and in particular to a method, system, and vehicle multimedia system for adjusting sound distortion. Background Technology

[0002] When playing music or other audio content in a car's multimedia system, the sound heard by the user differs significantly from the original recording when the volume is turned up. This is because increasing the volume causes signal overflow; the overflowed portion of the signal is neatly cut off, as if slicing it with a knife, resulting in sound distortion, affecting the user's listening experience, and degrading the user's overall experience. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method, system and vehicle multimedia system for adjusting sound distortion, so as to avoid distortion at high volumes and improve the user experience.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows:

[0005] In a first aspect, embodiments of the present invention provide a method for adjusting sound distortion, comprising: acquiring a detection signal of a power amplifier device; wherein the detection signal is a signal obtained by the power amplifier device from receiving audio with distortion detection; if the audio is determined to be in a distorted state based on the detection signal, adjusting the volume of the audio based on a preset pace, and outputting the adjusted audio to the power amplifier device.

[0006] In one embodiment, after acquiring the detection signal of the power amplifier device, the method further includes: determining whether the audio is in a distorted state based on the detection signal; if the detection signal is high, then determining that the audio is in a distorted state.

[0007] In one implementation, before adjusting the audio volume based on a preset pace, the method further includes: determining whether the current audio volume is adjustable; if the current audio volume is adjustable, then adjusting the audio volume based on the preset pace.

[0008] In one implementation, adjusting the audio volume based on a preset pace includes: reducing the audio volume based on a first preset pace until the audio is in a distortion-free state; and fine-tuning the audio volume based on a second preset pace until the audio volume is the maximum volume in the distortion-free state; wherein the first preset pace is greater than the second preset pace.

[0009] Secondly, embodiments of the present invention provide a sound distortion adjustment system, the adjustment system comprising: a controller, a power amplifier, and a speaker unit; the power amplifier is used to perform distortion detection on received audio to obtain a detection signal, and send the detection signal to the controller; the controller is used to adjust the volume of the audio based on a preset pace when it is determined that the audio is in a distorted state based on the detection signal, and output the adjusted audio to the power amplifier; the speaker unit is used to play the audio output by the power amplifier.

[0010] In one implementation, the controller is further configured to: determine whether the audio is distorted based on the detection signal; if the detection signal is high, then determine that the audio is distorted.

[0011] In one implementation, the controller is further configured to: determine whether the current volume of the audio is adjustable; if the current volume of the audio is adjustable, adjust the volume of the audio based on a preset pace.

[0012] In one embodiment, the controller is further configured to: reduce the volume of the audio based on a first preset step until the audio is in a distortion-free state; and fine-tune the audio volume based on a second preset step until the audio volume is the maximum volume in the distortion-free state; wherein the first preset step is greater than the second preset step.

[0013] Thirdly, embodiments of the present invention provide an in-vehicle multimedia system, including the sound distortion adjustment system provided in any of the second aspects above.

[0014] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the method provided in any of the first aspects above.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The sound distortion adjustment method, system, and in-vehicle multimedia system provided in this invention can acquire the detection signal of the power amplifier device (the detection signal is the signal obtained by the power amplifier device from the received audio distortion detection); if it is determined that the audio is distorted based on the detection signal, the audio volume is adjusted according to a preset pace, and the adjusted audio is output to the power amplifier device. This method can adjust the audio volume after detecting audio distortion, thereby preventing audio distortion from persisting and improving the user experience.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A flowchart of a sound distortion adjustment method provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of clipping distortion provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of volume adjustment provided in an embodiment of the present invention;

[0023] Figure 4 A flowchart of another sound distortion adjustment method provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a sound distortion adjustment system provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0026] icon:

[0027] 501 - Controller; 502 - Power amplifier; 503 - Audio unit. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Currently, in in-vehicle multimedia systems, when playing music or other audio content at relatively high volumes, signal overflow occurs. The overflowed portion of the signal is neatly clipped, as if shaved off, resulting in sound distortion. This distortion arises because the circuit's power supply current is finite. When the output volume is turned up very high, distortion occurs. This large signal distortion caused by insufficient power is called clipping distortion, where the peak of the waveform is truncated, resulting in an incomplete waveform. To fundamentally solve this problem, increasing the power supply current is needed. However, the product's power supply is fixed, so there will always be instances where the volume exceeds the current driving capacity, causing distortion. This results in the sound heard by the user differing significantly from the original recording, affecting the user's listening experience and reducing overall user satisfaction.

[0030] Based on this, the sound distortion adjustment method, system, and in-vehicle multimedia system provided in this embodiment of the invention can avoid distortion at high volumes and improve the user experience.

[0031] To facilitate understanding of this embodiment, a method for adjusting sound distortion disclosed in this invention will first be described in detail. This method can be executed by the controller of a sound distortion adjustment system. See also... Figure 1 The flowchart shown illustrates a method for adjusting sound distortion, which mainly includes the following steps S101 to S102:

[0032] Step S101: Obtain the detection signal of the power amplifier device.

[0033] The detection signal is the signal obtained by the power amplifier device through distortion detection of the received audio. In one embodiment, see [link to embodiment]. Figure 2 As shown, when the output audio is distorted, the peaks and troughs of a smooth circular sine wave are flattened, forming a square wave. After the peaks and troughs of the audio signal are cut off and flattened, an unnatural and harsh sound is produced when this signal is played through a speaker, sounding very dry. Therefore, in this embodiment of the invention, a power amplifier device with distortion detection can be selected. This power amplifier device performs distortion detection on the received audio signal, obtains a monitoring signal, and outputs the detection signal to the controller.

[0034] Step S102: If the audio is determined to be distorted based on the detection signal, the audio volume is adjusted according to a preset pace, and the adjusted audio is output to the power amplifier device.

[0035] In one implementation, the controller can determine whether the audio is distorted based on the received detection signal. If the audio is distorted, the controller can adjust the audio volume according to a preset step to prevent audio distortion, and then output the adjusted, undistorted audio to the power amplifier. The preset step can be set according to the actual situation.

[0036] The sound distortion adjustment method provided in this embodiment of the invention can adjust the audio volume after detecting audio distortion, thereby preventing audio distortion from persisting and improving the user experience.

[0037] In one implementation, after receiving the monitoring signal from the power amplifier device, the controller needs to determine whether the audio output power (volume) needs to be adjusted to avoid clipping distortion. Therefore, after acquiring the detection signal from the power amplifier device, the method further includes: determining whether the audio is distorted based on the detection signal; if the detection signal is high, then the audio is determined to be distorted.

[0038] In practice, the controller can directly read the distortion state via the high and low levels of the I / O ports. Specifically, the controller determines the audio distortion state by judging whether the received detection signal is high or low. If the detection signal received by the controller from the power amplifier is high, the audio is determined to be distorted, and the output power needs to be adjusted; if the detection signal received by the controller from the power amplifier is low, the audio is determined not to be distorted, and the output power does not need to be adjusted.

[0039] Furthermore, before adjusting the audio volume based on a preset pace, the method further includes: determining whether the current audio volume is adjustable; if the current audio volume is adjustable, then adjusting the audio volume based on a preset pace.

[0040] In practice, once the audio is determined to be distorted, it is necessary to further determine whether the current volume of the audio needs to be adjusted. If the current volume is not at its minimum value, it is determined that the current volume needs to be adjusted, and the volume is reduced to lower its peaks and troughs, thereby avoiding distortion.

[0041] Considering that harsh sounds caused by distortion are unacceptable to users, this invention aims to improve distortion more quickly and enhance user experience. In this embodiment, when adjusting audio volume, the audio can be quickly adjusted to a distortion-free state before fine-tuning. This avoids persistent distortion and provides users with higher sound quality. Therefore, in this embodiment, when adjusting audio volume based on preset steps, the following methods can be used, including but not limited to: First, reducing the audio volume based on a first preset step until the audio is distortion-free; then, fine-tuning the audio volume based on a second preset step until the audio volume reaches the maximum volume in the distortion-free state; wherein the first preset step is greater than the second preset step.

[0042] In practice, the first preset step can be set to a higher level, meaning each adjustment range is larger, while the second preset step can be set to a lower level, meaning each adjustment range is smaller. For details, see [link to relevant documentation]. Figure 3 As shown, when the audio is distorted, you can first make a larger step adjustment to reduce the volume to a non-distorted state, and then make a smaller fine adjustment to adjust the audio to the maximum volume in a non-distorted state.

[0043] The method provided in this embodiment of the invention can dynamically adjust the output power and reduce the volume when distortion occurs at high volumes, thereby avoiding the persistent distortion and providing users with higher sound quality and improved user experience.

[0044] For ease of understanding, this invention also provides a specific method for adjusting sound distortion, see [link to relevant documentation]. Figure 4 As shown, firstly, the power amplifier device determines whether the audio is in a distorted state. If it is, the distortion detection signal is fed back to the controller. After determining that the current audio is distorted, the controller determines whether the current volume is adjustable. If the current volume is adjustable, the volume is reduced and the adjusted audio is output to the power amplifier device, and the system continues to determine whether the audio is distorted. If the current volume is not adjustable, the system returns to determine whether the audio is distorted again.

[0045] The method provided in this embodiment of the invention can dynamically adjust the output power when a distortion state is detected when the volume is increased, so as to avoid the harsh distortion phenomenon from continuing and improve the user experience.

[0046] In addition to the aforementioned method for adjusting sound distortion, this invention also provides a system for adjusting sound distortion, see [link to relevant documentation]. Figure 5The diagram shows a sound distortion adjustment system, which mainly includes a controller 501, a power amplifier 502, and a speaker unit 503.

[0047] The power amplifier 502 is used to detect distortion in the received audio to obtain a detection signal and send the detection signal to the controller 501; the controller 501 is used to adjust the volume of the audio according to a preset pace when the audio is determined to be distorted based on the detection signal, and output the adjusted audio to the power amplifier 502; the speaker unit 503 is used to play the audio output by the power amplifier 502, wherein the speaker unit 503 may be a loudspeaker.

[0048] The sound distortion adjustment system provided in this embodiment of the invention can adjust the audio volume after detecting audio distortion, thereby preventing audio distortion from persisting and improving the user experience.

[0049] In one embodiment, the controller 501 is further configured to: determine whether the audio is distorted based on the detection signal; if the detection signal is high, then determine that the audio is distorted.

[0050] In one embodiment, the controller 501 is further configured to: determine whether the current volume of the audio is adjustable; if the current volume of the audio is adjustable, adjust the volume of the audio based on a preset pace.

[0051] In one embodiment, the controller 501 is further configured to: reduce the volume of the audio based on a first preset step until the audio is in a distortion-free state; and fine-tune the audio volume based on a second preset step until the audio volume is the maximum volume in the distortion-free state; wherein the first preset step is greater than the second preset step.

[0052] The system provided in this invention integrates audio source output, audio processing, and distortion detection functions under the control of the main control chip, enabling better handling of distortion detection and recovery. For example, if different audio source files have different volume levels, causing distortion protection to activate, switching to another normal audio source can restore the volume to its previous state.

[0053] It should be noted that the system provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the system embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0054] This invention provides an in-vehicle multimedia system, including the sound distortion adjustment system provided in the above embodiments. Its implementation principle and the resulting technical effects are the same as those of the aforementioned system embodiments, and will not be repeated here.

[0055] This invention also provides an electronic device, specifically, the electronic device includes a processor and a storage device; the storage device stores a computer program, and the computer program, when run by the processor, executes the method described in any of the above embodiments.

[0056] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. The electronic device 100 includes: a processor 60, a memory 61, a bus 62, and a communication interface 63. The processor 60, the communication interface 63, and the memory 61 are connected through the bus 62. The processor 60 is used to execute executable modules, such as computer programs, stored in the memory 61.

[0057] The memory 61 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 63 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0058] Bus 62 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0059] The memory 61 is used to store programs. After receiving an execution instruction, the processor 60 executes the programs. The method executed by the device for defining the flow process disclosed in any of the foregoing embodiments of the present invention can be applied to the processor 60 or implemented by the processor 60.

[0060] Processor 60 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 60 or by instructions in software form. Processor 60 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 61. Processor 60 reads the information in memory 61 and, in conjunction with its hardware, completes the steps of the above method.

[0061] The computer program product of the readable storage medium provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the foregoing method embodiments. For specific implementation, please refer to the foregoing method embodiments, which will not be repeated here.

[0062] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0063] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for adjusting sound distortion, characterized in that, include: Acquire the detection signal of the power amplifier device; wherein, the detection signal is the signal obtained by the power amplifier device through distortion detection of the received audio; If the audio is determined to be distorted based on the detection signal, the volume of the audio is adjusted according to a preset pace, and the adjusted audio is output to the power amplifier device. Adjusting the volume of the audio based on a preset pace includes: reducing the volume of the audio based on a first preset pace until the audio is in a distortion-free state; and fine-tuning the volume of the audio based on a second preset pace until the volume of the audio is at its maximum volume in a distortion-free state; wherein the first preset pace is greater than the second preset pace.

2. The method according to claim 1, characterized in that, After acquiring the detection signal of the power amplifier device, the method further includes: Based on the detection signal, determine whether the audio is in a distorted state; If the detection signal is high, the audio is determined to be distorted.

3. The method according to claim 1, characterized in that, Before adjusting the volume of the audio based on a preset pace, the method further includes: Determine whether the current volume of the audio is adjustable; If the current volume of the audio is adjustable, the volume of the audio is adjusted based on a preset pace.

4. A sound distortion adjustment system, characterized in that, The adjustment system includes: a controller, a power amplifier, and a speaker unit; The power amplifier device is used to perform distortion detection on the received audio to obtain a detection signal, and send the detection signal to the controller; The controller is used to adjust the volume of the audio based on a preset pace when the audio is determined to be in a distorted state based on the detection signal, and output the adjusted audio to the power amplifier device. The audio unit is used to play the audio output by the power amplifier device; The controller is further configured to: reduce the volume of the audio based on a first preset step until the audio is in a distortion-free state; and fine-tune the volume of the audio based on a second preset step until the volume of the audio is the maximum volume in the distortion-free state; wherein the first preset step is greater than the second preset step.

5. The system according to claim 4, characterized in that, The controller is also used for: Based on the detection signal, determine whether the audio is in a distorted state; If the detection signal is high, the audio is determined to be distorted.

6. The system according to claim 5, characterized in that, The controller is also used for: Determine whether the current volume of the audio is adjustable; If the current volume of the audio is adjustable, the volume of the audio is adjusted based on a preset pace.

7. A vehicle-mounted multimedia system, characterized in that, The sound distortion adjustment system includes any one of claims 4 to 6.

8. A computer-readable storage medium storing a computer program thereon, characterized in that, The computer program, when executed by a processor, performs the steps of the method described in any one of claims 1 to 3.

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