Drive Signal Generation System and Method

Abstract

The present invention provides a system and method for generating a driving signal for a 2-in-1 device. The driving signal is used to drive a 2-in-1 device having an integrated structure composed of a first device for generating sound and a second device for generating vibration. The signal control system includes an audio signal pre-processing module for performing low-frequency filtering and sound effect processing on a received input signal to obtain an audio signal, a vibration signal generation module for generating a vibration signal based on the audio characteristics of the audio signal or a preset vibration mode library, a signal synthesis module for superimposing the audio signal and the vibration signal to output the superimposed signal as a driving signal, and a limiter control module for determining whether the audio signal and the vibration signal exceed the maximum allowable range when the audio signal and the vibration signal are superimposed and performing attenuation processing. Compared with the prior art, the driving signal generation system of the present invention can reduce the connection requirements of the driving circuit and can realize the use of the two components in the 2-in-1 device together or separately.

Description

Technical Field

[0001] The present invention relates to a signal generation module, and more particularly to a drive signal generation system and method.

Background Art

[0002] Since mobile devices need to implement more and more functions, the components required to be used in the devices are increasing. When the overall space is limited, how to reduce the size of the components and improve the space utilization is a problem faced by component providers.

[0003] In the prior art, a two-in-one device (2-in-1 device) integrating a speaker and a motor has been proposed. As a result, the size of the terminal device is significantly reduced, and the speaker and the motor can be connected to a power amplifier and used in the conventional manner respectively.

[0004] However, in the prior art, since the drive signal control method of the 2-in-1 device still drives separately using an audio signal and a vibration signal, the connection method of the device still remains the existing two-terminal connection. This has the drawback that the space occupancy of the terminal device cannot be further reduced.

[0005] Therefore, in order to solve the above problems, it is necessary to provide a new signal generation module.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problem to be solved by the present invention is to provide a system and method for generating a single drive signal for a 2-in-1 device.

Means for Solving the Problems

[0007] To solve the above technical problems, the following means are provided

[0008] (First aspect) The present invention is a drive signal generation system, wherein the drive signal is used to drive a 2-in-1 device having an integrated structure composed of a first device that generates sound and a second device that generates vibration. The drive signal generation system includes an audio signal preprocessing module that performs low-frequency filtering and acoustic effect processing on a received input signal according to high-pass filter parameters to obtain an audio signal, a vibration signal generation module that generates a vibration signal based on the audio characteristics of the audio signal or a preset vibration mode library, a signal synthesis module that superimposes the audio signal and the vibration signal and outputs the result as the drive signal for driving the 2-in-1 device, and a limiter control module that determines whether the maximum allowable ranges of the first device and the second device in the 2-in-1 device are exceeded when the audio signal and the vibration signal are superimposed, and performs attenuation processing on the audio signal and / or the vibration signal.

[0009] Preferably, the audio signal preprocessing module includes a high-pass filtering sub-module that performs low-frequency filtering on the input signal according to high-pass filter parameters to obtain a high-frequency signal, a dynamic enhancement sub-module that performs dynamic adjustment on the high-frequency signal to increase the volume, and a bass enhancement sub-module that performs bass enhancement on the high-frequency signal according to a preset psychoacoustic model and outputs the enhanced high-frequency signal as the audio signal.

[0010] Preferably, the audio signal preprocessing module further includes an airflow noise removal sub-module that removes airflow noise in the audio signal according to a preset signal processing model and outputs the result.

[0011] Preferably, the vibration signal generation module includes a vibration mode sub-module that stores the vibration mode in the vibration mode library according to a preset vibration scene generation vibration mode, a signal generation sub-module that reads the vibration mode library as needed, combines different vibration modes, and generates a vibration signal that adapts to the parameter performance of the 2-in-1 device, and a voice conversion sub-module that extracts the voice characteristics of the voice signal and generates a corresponding vibration signal according to the voice characteristics.

[0012] Preferably, the voice characteristics are the characteristic information of a specific frequency of the voice signal.

[0013] Preferably, the drive signal generation system further includes a limiter sub-module that performs dynamic limit processing on the voice signal and / or the vibration signal to avoid the amplitude of the voice signal and / or the vibration signal exceeding the maximum amplitude of the signal that the 2-in-1 device can withstand.

[0014] Preferably, after the limiter sub-module performs dynamic limit processing on the voice signal and / or the vibration signal, the frequency of the voice signal is greater than 200 Hz, and the frequency of the vibration signal is less than 200 Hz.

[0015] Preferably, the signal synthesis module is configured to directly superimpose the voice signal and the vibration signal based on the frequency to obtain a drive signal having the frequencies of the voice signal and the vibration signal.

[0016] Preferably, when the voice signal and the vibration signal overlap, the limiter control module determines whether the maximum allowable ranges of the first device and the second device in the 2-in-1 device are exceeded. Here, when the voice signal and the vibration signal overlap, the overlapping frequency within the next set time of the overlapping point is predicted, and it is determined whether the overlapping frequency exceeds the maximum allowable range. If it exceeds, any one of the following attenuation processes is performed: an attenuation process on the voice signal at the next overlapping point, an attenuation process on the vibration signal at the next overlapping point, or a simultaneous attenuation process on the voice signal and the vibration signal at the next overlapping point.

[0017] (Second aspect) The present invention is a method for generating a drive signal, which is applied to a 2-in-1 device having an integrated structure composed of a first device for generating sound and a second device for generating vibration. The method for generating the drive signal includes: receiving an input signal and performing low-frequency filtering and acoustic effect processing according to a high-pass filter parameter to obtain a voice signal; generating a vibration signal based on the voice characteristics of the voice signal or a preset vibration mode library; superimposing the voice signal and the vibration signal and outputting the superimposed signal as the drive signal for driving the 2-in-1 device; and determining whether the maximum allowable ranges of the first device and the second device in the 2-in-1 device are exceeded when the voice signal and the vibration signal overlap, and performing an attenuation process on the voice signal and / or the vibration signal.

Advantages of the Invention

[0018] Compared with the prior art, in the driving signal generation system of the present invention, first, the received input signal performs low-frequency filtering and acoustic effect processing according to the high-pass filter parameters to obtain an audio signal. Then, a vibration signal is generated based on the audio characteristics of the audio signal or a preset vibration mode library, and the audio signal and the vibration signal are superimposed and output as the driving signal applied to the 2-in-1 device. Here, when the audio signal and the vibration signal are superimposed, it is determined whether the maximum allowable range of the first device or the second device in the 2-in-1 device is exceeded, and an attenuation process is performed on the audio signal and / or the vibration signal. The present invention can superimpose an audio signal and a vibration signal on the premise of maintaining the original driving function by a certain signal generation method, obtain a single driving signal, and reduce the connection requirements of the driving circuit. At the same time, the effect of realizing the use of the two configurations together or separately can be achieved, saving the manufacturing cost of the terminal device and improving the space utilization rate of the terminal device.

Brief Description of the Drawings

[0019] To more clearly explain the technical solutions in the embodiments of the present invention, the drawings necessary for the description of the embodiments will be briefly described. The drawings in the following description are only some embodiments of the present invention. Those skilled in the art can conceive of other drawings based on these drawings without creative work.

Figure 1

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Figure 4

Modes for Carrying Out the Invention

[0020] The following will clarify and detail the technical solutions in the embodiments of the present invention. It should be noted that the embodiments described below are only part of the embodiments of the present invention, not all of them. Also, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are included within the protection scope of the present invention.

[0021] FIG. 1 is a structural conceptual diagram of a drive signal generation system provided by an embodiment of the present invention. The drive signal is used to drive a 2-in-1 device (a structure in which two elements are integrated into one body) having an integrated structure composed of a first device for generating sound and a second device for generating vibration.

[0022] The signal control system 100 has the following structure.

[0023] Audio signal preprocessing module 101: It is used to perform low-frequency filtering and acoustic effect processing on the received input signal according to the high-pass filter parameters to obtain an audio signal.

[0024] Vibration signal generation module 102: It is used to generate a vibration signal according to the voice characteristics of the audio signal or a preset vibration mode library.

[0025] Signal synthesis module 103: It is used to superimpose the audio signal and the vibration signal to generate the drive signal for driving the 2-in-1 device.

[0026] Limiter control module 104: When the audio signal and the vibration signal are superimposed, it is used to determine whether the maximum allowable range of the first device and the second device in the 2-in-1 device is exceeded, and to attenuate the audio signal and / or the vibration signal.

[0027] Specifically, the signal control system 100 in the embodiment of the present invention is used in connection with a power amplifier, a front-end circuit, and a 2-in-1 device. The power amplifier is a single power amplifier and is used for amplifying general digital signals. The front-end circuit is used to connect the 2-in-1 device. The drive signal in the embodiment of the present invention is loaded onto the 2-in-1 device via the front-end circuit. In an actual structure, the first device of the 2-in-1 device is provided with a first load terminal, the second device is provided with a second load terminal, and after the front-end circuit processes the drive signal, the audio signal and the vibration signal are loaded onto different load terminals to realize the drive of the 2-in-1 device.

[0028] Preferably, as shown in the structural concept diagram of the audio signal preprocessing module 101 provided by the embodiment of the present invention in FIG. 2, the audio signal preprocessing module 101 includes the following components.

[0029] High-pass filtering sub-module 1011: configured to perform low-frequency filtering on the input signal according to high-pass filter parameters to obtain a high-frequency signal.

[0030] Dynamic enhancement sub-module 1012: configured to dynamically adjust the high-frequency signal to increase the volume.

[0031] Bass enhancement sub-module 1013: configured to perform bass enhancement on the high-frequency signal according to a preset psychoacoustic model and output the enhanced high-frequency signal as the audio signal.

[0032] The high-pass filter parameters are pre-set for the 2-in-1 device and the implemented drive circuit, and are used to exclude the low-frequency part specified by the parameters from the input signal. Thereby, it is possible to avoid the low-frequency part from being read by the second device used for vibration and prevent interference of the vibration.

[0033] Preferably, the voice signal preprocessing module 101 further includes an airflow noise removal sub-module 1014 for removing the airflow noise in the voice signal and outputting it according to a pre-set signal processing model. The airflow noise is noise data in the input data. The pre-set signal processing model is executed by a main chip CPU, DSP, etc. of a device in the drive circuit, but can be realized by a hardware device capable of executing an algorithm such as an external Codec or a DSP on a power amplifier chip.

[0034] Preferably, as shown in the structural conceptual diagram of the voice signal preprocessing module 102 provided by the embodiment of the present invention in FIG. 3, the vibration signal generation module 102 has the following structure.

[0035] Vibration mode sub-module 1021: It is used to generate a vibration mode according to a pre-set vibration scene and save the vibration mode in the vibration mode library.

[0036] Signal generation sub-module 1022: According to the actual demand, it reads the vibration mode library, stitches different vibration modes, and is used to generate the vibration signal that meets the parameter performance of the 2-in-1 device.

[0037] Voice conversion sub-module 1023: It is used to extract the voice characteristics of the voice signal and generate the corresponding vibration signal according to the voice characteristics.

[0038] The pre-set vibration scenes include click, deletion, engine, etc. The vibration mode sub-module 1021 extracts important features of motor vibration within the scene to generate a vibration mode. In an embodiment, the vibration mode can be generated in a manual manner. The signal generation sub-module 1022 can connect the vibration modes according to the required scene to obtain the vibration signal. The vibration signal is determined by the usage scene of the 2-in-1 device.

[0039] Preferably, the voice characteristic is the characteristic information of a specific frequency of the voice signal. When the voice conversion sub-module 1023 generates the vibration signal according to the extracted voice characteristics, the vibration signal can be related to the voice content played by the 2-in-1 device, so that a better voice effect can be obtained. That is, the signal generation sub-module 1022 and the voice conversion sub-module 1023 are selectively used according to the requirements of various scenarios. In an embodiment, after the voice conversion sub-module 1023 generates the vibration signal according to the voice characteristics, the signal generation sub-module 1022 further optimizes the vibration signal according to the data in the mode library to improve the voice effect.

[0040] Preferably, the drive signal generation system further includes a limiter sub-module 105 for dynamically limiting the voice signal and / or the vibration signal to avoid the amplitudes of the voice signal and / or the vibration signal exceeding the maximum amplitude of the signal that the 2-in-1 device can withstand. As shown in FIGS. 2 and 3, the limiter sub-module 105 can be arranged at the output positions of the voice signal pre-processing module 101 and the voice signal pre-processing module 102.

[0041] Preferably, after the limiter sub-module 105 performs dynamic limit processing on the voice signal and / or the vibration signal, the frequency of the voice signal is greater than 200 Hz, and the frequency of the vibration signal is less than 200 Hz.

[0042] The vibration signal is mainly at a low frequency before 200 Hz, the voice signal is at a high frequency of 200 Hz or above, and since the two signals are processed, the frequency components do not overlap. Preferably, the signal synthesis module 103 directly adds the voice signal and the vibration signal based on the frequency, and obtains the drive signal having the frequencies of the voice signal and the vibration signal.

[0043] Preferably, when the voice signal and the vibration signal are superimposed, the limiter control module 104 determines whether it exceeds the maximum allowable range of the first device and the second device in the 2-in-1 device, and when the voice signal and the vibration signal are superimposed, predicts the superimposed frequency within the next set time at the superimposed point, and determines whether the superimposed frequency exceeds the maximum allowable range. If it exceeds, perform an attenuation process on the next voice signal at the superimposed point, or perform an attenuation process on the next vibration signal at the superimposed point, or perform an attenuation process on the next voice signal and the vibration signal at the superimposed point simultaneously.

[0044] Compared with the prior art, the present invention is applied to a driving signal generation system of a 2-in-1 device. Specifically, first, the received input signal performs low-frequency filtering and acoustic effect processing according to the high-pass filter parameters to obtain an audio signal. Then, a vibration signal is generated based on the audio characteristics of the audio signal and a preset vibration mode library. Finally, the audio signal and the vibration signal are superimposed and output as the driving signal of the 2-in-1 device. Here, when the audio signal and the vibration signal are superimposed, it is determined whether the maximum allowable range of the first device or the second device in the 2-in-1 device is exceeded, and an attenuation process is performed on the audio signal and / or the vibration signal. The present invention can superimpose an audio signal and a vibration signal on the premise of maintaining the original driving function by a certain signal generation method, obtain a single driving signal, and reduce the connection requirements of the driving circuit. At the same time, the effects that two configurations can be realized together or separately can be achieved, saving the manufacturing cost of the terminal device and improving the space utilization rate of the terminal device.

[0045] Embodiments of the present invention provide a method for generating a driving signal. FIG. 4 is a flowchart of a method for generating a driving signal for a 2-in-1 device provided by an embodiment of the present invention. The driving signal is used to drive a 2-in-1 device having an integrated structure composed of a first device that generates sound and a second device that generates vibration.

[0046] The signal control method includes the following steps. S1: Perform low-frequency filtering and acoustic effect processing on the received input signal according to the high-pass filter parameters to obtain an audio signal. S2: Generate a vibration signal based on the audio characteristics of the audio signal or a preset vibration mode library.

[0047] S3: Superimpose the audio signal and the vibration signal and output them as the driving signal for driving the 2-in-1 device.

[0048] S4: When the audio signal and the vibration signal overlap, determine whether the maximum allowable ranges of the first device and the second device in the 2-in-1 device are exceeded, and perform an attenuation process on the audio signal and / or the vibration signal.

[0049] When the method for generating a drive signal of the 2-in-1 device is executed, technical effects similar to those of the above-described drive signal generation system of the 2-in-1 device can be achieved, and thus details are omitted here.

[0050] The above-described content is only an embodiment of the present invention and does not limit the scope of the present invention. Any structural transformation, process transformation, or other related technical fields directly or indirectly used based on the description and drawings of the present invention are all included in the protection scope of the present invention.

Claims

1. A driving signal generation system, wherein the driving signal is used to drive a 2-in-1 device having an integrated structure composed of a first device for generating sound and a second device for generating vibration, the driving signal generation system includes an audio signal preprocessing module that performs low-frequency filtering and acoustic effect processing on the received input signal according to high-pass filter parameters to obtain an audio signal, a vibration signal generation module that generates a vibration signal based on the audio characteristics of the audio signal or a preset vibration mode library, a signal synthesis module that superimposes the audio signal and the vibration signal and outputs the result as the driving signal for driving the 2-in-1 device, a limiter control module that predicts the superimposed frequency within the next set time at the superimposition point when the audio signal and the vibration signal are superimposed, determines whether the superimposed frequency exceeds the maximum allowable range of the first device and the second device in the 2-in-1 device, and if it exceeds, performs any one of attenuation processing on the next audio signal at the superimposition point, attenuation processing on the next vibration signal at the superimposition point, or simultaneous attenuation processing on the next audio signal and the vibration signal at the superimposition point. A driving signal generation system characterized by comprising.

2. The audio signal preprocessing module includes a high-pass filtering sub-module that performs low-frequency filtering on the input signal according to high-pass filter parameters to obtain a high-frequency signal, a dynamic enhancement sub-module that performs dynamic adjustment on the high-frequency signal to increase the volume, a bass enhancement sub-module that performs bass enhancement on the high-frequency signal according to a preset psychoacoustic model and outputs the enhanced high-frequency signal as the audio signal. The driving signal generation system according to claim 1, characterized by comprising.

3. The audio signal preprocessing module further includes an airflow noise removal sub-module that removes airflow noise in the audio signal according to a preset signal processing model and outputs the result. The driving signal generation system according to claim 2, characterized by comprising.

4. The vibration signal generation module includes a vibration mode sub-module that stores the vibration mode in the vibration mode library according to a preset vibration scene generation vibration mode, Read the vibration mode library as needed, combine different vibration modes, and generate a vibration signal that adapts to the parameter performance of the 2-in-1 device, a signal generation sub-module; An audio conversion sub-module that extracts the audio characteristics of the audio signal and generates a corresponding vibration signal according to the audio characteristics, characterized in that the drive signal generation system according to claim 1 comprises:

5. The drive signal generation system according to claim 4, wherein the audio characteristics are characteristic information of a specific frequency of the audio signal.

6. The drive signal generation system further comprises a limiter sub-module for performing dynamic limit processing on the audio signal and / or the vibration signal to avoid the amplitude of the audio signal and / or the vibration signal exceeding the maximum amplitude of the signal that the 2-in-1 device can withstand, characterized in that the drive signal generation system according to claim 1 comprises:

7. After the limiter sub-module performs dynamic limit processing on the audio signal and / or the vibration signal, the frequency of the audio signal is greater than 200 Hz, and the frequency of the vibration signal is less than 200 Hz, characterized in that the drive signal generation system according to claim 6 comprises:

8. The signal synthesis module is configured to directly superimpose the audio signal and the vibration signal based on the frequency to obtain a drive signal having the frequencies of the audio signal and the vibration signal, characterized in that the drive signal generation system according to claim 7 comprises:

9. A method for generating a drive signal, wherein the drive signal is applied to a 2-in-1 device having an integrated structure composed of a first device for generating sound and a second device for generating vibration. The method for generating a drive signal comprises: Executing low-frequency filtering and acoustic effect processing on the received input signal according to the high-pass filter parameters to obtain an audio signal; Generating a vibration signal based on the audio characteristics of the audio signal or a preset vibration mode library; Superimposing the audio signal and the vibration signal and outputting the superimposed signal as the drive signal for driving the 2-in-1 device. When the audio signal and the vibration signal overlap, predict the overlapping frequency within the next setting time of the overlapping point, and determine whether the overlapping frequency exceeds the maximum allowable range of the first device and the second device in the 2-in-1 device. If it exceeds, perform any one of the following steps: attenuation processing on the next audio signal of the overlapping point, attenuation processing on the next vibration signal of the overlapping point, or simultaneous attenuation processing on the next audio signal and the next vibration signal of the overlapping point. A method for generating a driving signal, characterized by including this step.

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