CN114554381B - Automatic human voice restoration system and method - Google Patents
Automatic human voice restoration system and method Download PDFInfo
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- CN114554381B CN114554381B CN202210174208.XA CN202210174208A CN114554381B CN 114554381 B CN114554381 B CN 114554381B CN 202210174208 A CN202210174208 A CN 202210174208A CN 114554381 B CN114554381 B CN 114554381B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
- H04R27/04—Electric megaphones
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L17/00—Speaker identification or verification techniques
- G10L17/26—Recognition of special voice characteristics, e.g. for use in lie detectors; Recognition of animal voices
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- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/003—Changing voice quality, e.g. pitch or formants
- G10L21/007—Changing voice quality, e.g. pitch or formants characterised by the process used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
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Abstract
The invention discloses a voice automatic restoration system and a method thereof, wherein the system comprises a voice acquisition module, a voice recognition module and a signal processing module, wherein the voice acquisition module is used for acquiring voice audio signals and sending the voice audio signals to the voice recognition module and the signal processing module, the voice recognition module is used for recognizing the voice audio signals and sending sound base judgment signals to the signal processing module, and the signal processing module is used for adjusting the voice audio signals according to preset EQ parameters selected and adapted by the sound base judgment signals. According to the invention, the voice recognition module is used for recognizing the voice audio signal to obtain the voice base judgment signal corresponding to the voice sex attribute, then the voice audio signal is sent to the signal processing module, and the signal processing module is used for adjusting the voice audio signal according to the voice base judgment signal through the preset EQ parameter so as to improve the voice expansion tone quality and restore the voice effect of male voice or female voice with higher quality.
Description
Technical Field
The invention relates to the technical field of voice signal processing, in particular to a voice automatic restoration system and a method.
Background
Most of the sound amplifying devices used in the prior art have unobvious sound amplifying fidelity effect and have no recognition function of the sounds of men and women, so that obvious sound amplifying differences can occur when the sounds of men and women are amplified, the effect of conferences or speakers can be influenced in the mode, and the experience is poor.
Therefore, an automatic human voice restoration system is needed to solve the proposed problems.
Disclosure of Invention
Based on this, it is necessary to provide an automatic human voice restoration system and method that can restore the sound effects of male or female voices with high quality, regardless of male or female voices when speaking and expanding.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an automatic human voice recovery system which comprises a sound collecting module, a human voice identifying module and a signal processing module, wherein the sound collecting module is respectively connected with the human voice identifying module and the signal processing module, the human voice identifying module is connected with the signal processing module, the sound collecting module is used for collecting human voice audio signals and sending the human voice audio signals to the human voice identifying module and the signal processing module, the human voice identifying module is used for identifying the human voice audio signals and sending sound base judging signals to the signal processing module, and the signal processing module is used for adjusting the human voice audio signals according to preset EQ parameters which are selected and adapted by the sound base judging signals.
In one embodiment, the signal processing module comprises an MCU module and an audio processing module, wherein the input end of the MCU module is connected with the voice recognition module, the output end of the MCU module is connected with the audio processing module, and the audio processing module is connected with the sound collecting module.
In one embodiment, the MCU module stores preset EQ parameters, and the MCU module selects appropriate preset EQ parameters based on the audio base judgment signal and sends the parameters to the audio processing module.
In one embodiment, the voice recognition module includes a male voice base determination unit and a female voice base determination unit, where the male voice base determination unit and the female voice base determination unit are connected in parallel, the voice base determination signal includes a male voice base determination signal and a female voice base determination signal, and the male voice base determination unit is configured to receive a voice audio signal and send the male voice base determination signal to the signal processing module; the female voice base judging unit is used for receiving the human voice audio signal and sending the acquired female voice base judging signal to the signal processing module.
In one embodiment, the sound collection module includes a first comparator U3B, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, and an ESD tube D1, wherein a negative input end of the first comparator U3B is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the capacitor C19, one end of the capacitor C19 is connected to one end of the resistor R34, one end of the capacitor C21 is connected to one end of the resistor R34, one end of the capacitor C22, and one end of the ESD tube D1, the other end of the resistor R32 is connected to one end of the resistor R30 and one end of the capacitor C17, the other end of the resistor R30 is connected to the first analog power supply AVCC1, the capacitor C17 is connected to the resistor R29 in parallel, and the other end of the capacitor C17 is grounded; the positive input end of the first comparator U3B is connected with one end of a resistor R35 and one end of a resistor R36, the other end of the resistor R36 is connected with a reference voltage VREF, the other end of the resistor R35 is connected with one end of a capacitor C23, the other end of the capacitor C23 is connected with the other end of a capacitor C21, the other end of the capacitor C22 and the other end of an ESD tube D1, and the other end of the capacitor C23 is grounded; the output end of the first comparator U3B is connected with one end of a capacitor C20, one end of a resistor R31 and one end of a capacitor C18, the other end of the resistor R31 and the other end of the capacitor C18 are respectively connected with the negative input end of the first comparator U3B, the other end of the capacitor C20 corresponds to the output end MIC_OUT of the sound collection module, and one end of the capacitor C22 corresponds to the input end MIC_IN of the sound collection module.
In one embodiment, the male sound base judging unit includes resistors R1 to R14, capacitors C1 to C8, a second comparator U1A, a third comparator U1B, and a first triode Q1, where a negative input end of the second comparator U1A is connected to one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C6 is connected to one end of a capacitor C8, one end of a resistor R9, and one end of a resistor R13, one end of the resistor R9 is connected to an output end mic_out of the sound collecting module, the other end of the resistor R13 is grounded, the other end of the resistor R14 and the other end of the capacitor C8 are connected to an output end of the second comparator U1A, a positive input end of the second comparator U1A is connected to one end of a resistor R6 and one end of a resistor R4, the other end of the resistor R4 is grounded, one end of a resistor R1, one end of a capacitor C2, one end of a capacitor C3, and a second analog power supply AVCC2, the other end of the resistor R1 is connected to one end of the capacitor C1 and the power supply voltage VCC, and the other end of the capacitor C3 are grounded; the output end of the second comparator U1A is connected with a resistor R8, the resistor R8 is connected with one end of a resistor R11, one end of a capacitor C5 and one end of a capacitor C7, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected with the negative input end of the third comparator U1B and a resistor R12, the other end of the capacitor C7 and the other end of the resistor R12 are connected with the output end of the third comparator U1B, the positive input end of the third comparator U1B is connected with one end of a resistor R5 and one end of a resistor R3, the other end of the resistor R5 is grounded, and the resistor R3 is connected with a second analog power supply AVCC2; the output end of the third comparator U1B is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R10 and the base electrode of the first triode Q1, the other end of the resistor R10 is connected with the collector electrode of the first triode Q1 and one end of a resistor R2, the other end of the resistor R2 is connected with a power supply voltage VCC, and the emitter electrode of the first triode Q1 is grounded; wherein, the collector of the first triode Q1 corresponds to the output end DEL1_DET of the male voice base judging unit.
In one embodiment, the female sound base judging unit includes resistors R15 to R28, capacitors C9 to C16, a fourth comparator U2A, a fifth comparator U2B, and a second triode Q3, where a negative input end of the fourth comparator U2A is connected to one end of the capacitor C14 and one end of the resistor R28, the other end of the capacitor C14 is connected to one end of the capacitor C16, one end of the resistor R23, and one end of the resistor R27, one end of the resistor R23 is connected to an output end mic_out of the sound collecting module, the other end of the resistor R27 is grounded, the other end of the resistor R28 and the other end of the capacitor C16 are connected to an output end of the fourth comparator U2A, a positive input end of the fourth comparator U2A is connected to one end of the resistor R20 and one end of the resistor R18, the other end of the resistor R20 is grounded, the other end of the resistor R18 is connected to one end of the resistor R15, one end of the capacitor C10, one end of the capacitor C11, and one end of the second analog power supply AVCC1, the other end of the resistor R15 is connected to one end of the capacitor C9 and one end of the power supply voltage VCC, and the other end of the capacitor C9, and the other end of the capacitor C11 and the other end of the capacitor C11 are grounded; the output end of the fourth comparator U2A is connected with a resistor R22, the resistor R22 is connected with one end of a resistor R25, one end of a capacitor C13 and one end of a capacitor C15, the other end of the resistor R25 is grounded, the other end of the capacitor C13 is connected with the negative input end of the fifth comparator U2B and a resistor R26, the other end of the capacitor C15 and the other end of the resistor R26 are connected with the output end of the fifth comparator U2B, the positive input end of the fifth comparator U2B is connected with one end of a resistor R19 and one end of a resistor R17, the other end of the resistor R19 is grounded, and the resistor R17 is connected with a second analog power supply AVCC2; the output end of the fifth comparator U2B is connected with one end of a capacitor C12, the other end of the capacitor C12 is connected with one end of a resistor R21, the other end of the resistor R21 is connected with one end of a resistor R24 and the base electrode of a second triode Q3, the other end of the resistor R24 is connected with the collector electrode of the second triode Q3 and one end of a resistor R16, the other end of the resistor R16 is connected with a power supply voltage VCC, and the emitter electrode of the second triode Q3 is grounded; wherein, the collector of the second triode Q3 corresponds to the output terminal dell2_det of the female voice base judging unit.
The invention also provides a method for automatically restoring the human voice, which comprises the following steps:
collecting and processing human voice audio signals through a sound collecting module;
judging the voice audio signal through a voice recognition module to obtain a voice base judgment signal;
based on the sound base judgment signal, the signal processing module adjusts the voice audio signal according to the preset EQ parameter to obtain voice audio adjusting sound.
The method for acquiring the voice audio adjusting sound comprises the following specific operations:
when the male voice base judging unit sends a male voice base judging signal to the MCU module through the corresponding IO detection port, the MCU module judges that the corresponding voice audio signal is a male speaker; after judging the sound gender attribute, the MCU module sends the preset EQ parameters corresponding to the male sound to the audio processing module, and the audio processing module adjusts the voice audio signal to acquire voice audio adjusting sound.
In one embodiment, the step is based on the sound base judgment signal, the signal processing module adjusts the voice audio signal according to the preset EQ parameter, and the specific operation includes:
when the female voice base judging unit sends a female voice base judging signal to the MCU module through the corresponding IO detection port, the MCU module judges that the corresponding voice audio signal is a female speaker; after judging the sound gender attribute, the MCU module sends the preset EQ parameters corresponding to the female sound to the audio processing module, and the audio processing module adjusts the human voice audio signal to obtain the human voice audio adjusting sound.
In summary, the present invention provides an automatic voice recovery system and method, which uses a voice recognition module to recognize a voice audio signal to obtain a voice base judgment signal corresponding to a voice gender attribute, and then sends the voice audio signal to a signal processing module, where the signal processing module adjusts the voice audio signal according to the voice base judgment signal by presetting an EQ parameter, so as to improve the sound quality of the amplified voice and recover the voice effect of male voice or female voice with higher quality.
Drawings
FIG. 1 is a block diagram of a first automatic human voice restoration system according to an embodiment of the present invention;
FIG. 2 is a block diagram of a second automatic human voice restoration system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a third system for automatic reproduction of human voice according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a sound collection module according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a voice recognition module according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for automatically restoring human voice according to an embodiment of the present invention;
FIG. 7 is a graph of frequency-amplitude response of a 200Hz centered frequency bin signal provided by an embodiment of the present invention;
fig. 8 is a frequency-group delay chart corresponding to a male voice base judgment signal according to an embodiment of the present invention;
fig. 9 is a graph of a jump signal corresponding to a male voice base judgment signal provided by an embodiment of the present invention;
FIG. 10 is a graph of frequency-amplitude response of a 400Hz centered frequency bin signal provided by an embodiment of the present invention;
FIG. 11 is a frequency-group delay chart corresponding to a female voice-based judgment signal according to an embodiment of the present invention;
fig. 12 is a graph of a jump signal corresponding to a female voice base judgment signal according to an embodiment of the present invention.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Based on the relation between the pitch frequency of the male voice and the female voice and the length, thickness, toughness, stiffness, pronunciation habit and the like of the vocal cords, the characteristics of the male voice and the female voice are reflected to a great extent, the pitch frequency of the female voice is higher than that of the male voice, the pitch frequency of the male voice is lower, the pitch frequency range of the male voice is 50-250Hz, the pitch frequency of the female voice is relatively higher, and the pitch frequency range of the female voice is 100-500Hz; the system and the method for automatically restoring the human voice provided by the embodiment of the invention can be particularly applied to an intelligent terminal, the system for automatically restoring the human voice comprises a sound collecting module, a human voice identifying module and a signal processing module, wherein the human voice identifying module is used for identifying the human voice audio signal to obtain a sound base judging signal corresponding to the attribute of the sound gender, then the human voice audio signal is sent to the signal processing module, and the signal processing module is used for adjusting the human voice audio signal according to the sound base judging signal through a preset EQ (equalizer) parameter so as to improve the sound expansion quality and restore the sound effect of male or female voice with higher quality. The following describes a system and a method for automatically restoring human voice provided in this embodiment in detail.
As shown in fig. 1, the automatic human voice restoring system of the present invention includes a sound collecting module 100, a human voice identifying module 200 and a signal processing module 300, wherein the sound collecting module 100 is respectively connected with the human voice identifying module 200 and the signal processing module 300, the human voice identifying module 200 is connected with the signal processing module 300, the sound collecting module 100 is used for collecting human voice audio signals and transmitting the human voice audio signals to the human voice identifying module 200 and the signal processing module 300, the human voice identifying module 200 is used for identifying the human voice audio signals and transmitting a sound base judging signal to the signal processing module 300, and the signal processing module 300 selects an adaptive preset EQ parameter according to the sound base judging signal to adjust the human voice audio signals.
As shown in fig. 4, the sound collection module 100 includes a first comparator U3B, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a capacitor C17, a capacitor C18, a capacitor C19, a capacitor C20, a capacitor C21, a capacitor C22, a capacitor C23, and an ESD tube D1, wherein a negative input end of the first comparator U3B is connected to one end of the resistor R33, the other end of the resistor R33 is connected to one end of the capacitor C19, one end of the capacitor C19 is connected to one end of the resistor R34, one end of the capacitor C21 is connected to one end of the resistor R34, one end of the capacitor C22, and one end of the ESD tube D1, the other end of the resistor R32 is connected to one end of the resistor R30, the other end of the resistor R30 is connected to the first analog power supply AVCC1, the capacitor C17 is connected to the resistor R29 in parallel, and the other end of the capacitor C17 is grounded; the positive input end of the first comparator U3B is connected with one end of a resistor R35 and one end of a resistor R36, the other end of the resistor R36 is connected with a reference voltage VREF, the other end of the resistor R35 is connected with one end of a capacitor C23, the other end of the capacitor C23 is connected with the other end of a capacitor C21, the other end of the capacitor C22 and the other end of an ESD tube D1, and the other end of the capacitor C23 is grounded; the output end of the first comparator U3B is connected with one end of a capacitor C20, one end of a resistor R31 and one end of a capacitor C18, the other end of the resistor R31 and the other end of the capacitor C18 are respectively connected with the negative input end of the first comparator U3B, the other end of the capacitor C20 corresponds to the output end MIC_OUT of the sound collection module 100, and one end of the capacitor C22 corresponds to the input end MIC_IN of the sound collection module 100; the first comparator U3B adopts a chip model LM358.
The above-mentioned sound collection module 100 is implemented according to the principle that after a microphone receives a voice audio signal of a speaker, the voice audio signal enters the sound collection module 100 through an input end mic_in of the sound collection module 100, a pi-type filter formed by a capacitor C22, a resistor R34 and a capacitor C21 eliminates noise frequencies except voice, and after coupling by using the capacitor C19, a negative feedback operational amplification unit is formed by an electric group R33, a resistor R31 and a first comparator U3B, so that the voice audio signal collected by the sound collection module 100 is amplified, and the amplified voice audio signal is transmitted to the voice recognition module 200 through an output end mic_out of the sound collection module 100.
As shown in fig. 2, the voice recognition module 200 includes a male voice base determination unit 210 and a female voice base determination unit 220, wherein the voice base determination signals include a male voice base determination signal and a female voice base determination signal, and the male voice base determination unit 210 is configured to receive a voice audio signal and send the male voice base determination signal to the signal processing module 300; the female voice base determining unit 220 is configured to receive the human voice audio signal, and send the acquired female voice base determining signal to the signal processing module 300.
As shown in fig. 5, the male voice base judging unit 210 and the female voice base judging unit 220 are connected in parallel, the input ends of the male voice base judging unit 210 and the female voice base judging unit 220 are connected with the output end of the sound collecting module 100, the male voice base judging unit 210 includes resistors R1-R14, capacitors C1-C8, a second comparator U1A, a third comparator U1B and a first triode Q1, the negative input end of the second comparator U1A is connected with one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C6 is connected with one end of a capacitor C8, one end of a resistor R9 and one end of a resistor R13, one end of the resistor R9 is connected with the output end mic_out of the sound collecting module 100, the other end of the resistor R13 is grounded, the other end of the resistor R14 is connected with the output end of the second comparator U1A, the positive input end of the second comparator U1A is connected with one end of a resistor R6 and one end of a resistor R4, the other end of the resistor R6 is grounded, the other end of the resistor R4 is connected with one end of a resistor C1, one end of a capacitor C2 and the other end of a capacitor C2 and another end of a capacitor C1 and another end of a capacitor C2 and power supply voltage supply are connected with one end of the capacitor C1 and another end of the capacitor C2 and another end of the capacitor supply voltage supply is connected with the capacitor C1 and another end of the capacitor supply voltage supply; the output end of the second comparator U1A is connected with a resistor R8, the resistor R8 is connected with one end of a resistor R11, one end of a capacitor C5 and one end of a capacitor C7, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected with the negative input end of the third comparator U1B and a resistor R12, the other end of the capacitor C7 and the other end of the resistor R12 are connected with the output end of the third comparator U1B, the positive input end of the third comparator U1B is connected with one end of a resistor R5 and one end of a resistor R3, the other end of the resistor R5 is grounded, and the resistor R3 is connected with a second analog power supply AVCC2; the output end of the third comparator U1B is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R10 and the base electrode of the first triode Q1, the other end of the resistor R10 is connected with the collector electrode of the first triode Q1 and one end of a resistor R2, the other end of the resistor R2 is connected with a power supply voltage VCC, and the emitter electrode of the first triode Q1 is grounded; the collector of the first triode Q1 corresponds to the output terminal dell1_det of the male voice base judging unit 210, and the second comparator U1A and the third comparator U1B are all of the OPA1678 chip types.
The specific working principle of the male voice base judging unit 210 of the invention is that when a voice audio signal is sent by a male speaker, the amplified voice audio signal is coupled through a resistor R9 and matched with a resistor R13 and a capacitor C6 to form a first-order low-pass filter to filter out a high-frequency signal, and then matched with a resistor R14 and a capacitor C8 and a second comparator U1A to carry out a second-order filter treatment, thereby obtaining a frequency point signal and a group delay signal which are relatively gentle and take 200Hz as a center, as shown in fig. 7; as shown in fig. 8, the group delay signal is coupled through a resistor R8 and then enters a step response circuit composed of a capacitor C5, a capacitor C7, a resistor R12 and a third comparator U1B, so as to obtain a value that the jump signal becomes close to 0, as shown in fig. 9, at this time, the first triode Q1 is turned on, so that the output dell1_det signal of the male voice base judging unit 210 becomes 0 level, thereby obtaining a male voice base judging signal, and transmitting the male voice base judging signal to the signal processing module 300.
The female sound base judging unit 220 includes resistors R15 to R28, capacitors C9 to C16, a fourth comparator U2A, a fifth comparator U2B and a second triode Q3, where a negative input end of the fourth comparator U2A is connected to one end of the capacitor C14 and one end of the resistor R28, the other end of the capacitor C14 is connected to one end of the capacitor C16, one end of the resistor R23 and one end of the resistor R27, one end of the resistor R23 is connected to the output end mic_out of the sound collecting module 100, the other end of the resistor R27 is grounded, the other end of the resistor R28 and the other end of the capacitor C16 are connected to the output end of the fourth comparator U2A, a positive input end of the fourth comparator U2A is connected to one end of the resistor R20 and one end of the resistor R18, the other end of the resistor R20 is grounded, one end of the resistor R18 is connected to one end of the capacitor C10, one end of the capacitor C11 and one end of the second analog power supply AVCC1, the other end of the resistor R15 is connected to one end of the capacitor C9 and one end of the power supply voltage VCC, and the other end of the capacitor C9 and the other end of the capacitor C10 and the other end of the capacitor C11 are grounded; the output end of the fourth comparator U2A is connected with a resistor R22, the resistor R22 is connected with one end of a resistor R25, one end of a capacitor C13 and one end of a capacitor C15, the other end of the resistor R25 is grounded, the other end of the capacitor C13 is connected with the negative input end of the fifth comparator U2B and a resistor R26, the other end of the capacitor C15 and the other end of the resistor R26 are connected with the output end of the fifth comparator U2B, the positive input end of the fifth comparator U2B is connected with one end of a resistor R19 and one end of a resistor R17, the other end of the resistor R19 is grounded, and the resistor R17 is connected with a second analog power supply AVCC2; the output end of the fifth comparator U2B is connected with one end of a capacitor C12, the other end of the capacitor C12 is connected with one end of a resistor R21, the other end of the resistor R21 is connected with one end of a resistor R24 and the base electrode of a second triode Q3, the other end of the resistor R24 is connected with the collector electrode of the second triode Q3 and one end of a resistor R16, the other end of the resistor R16 is connected with a power supply voltage VCC, and the emitter electrode of the second triode Q3 is grounded; the collector of the second triode Q3 corresponds to the output terminal dell2_det of the female voice base judging unit 220, and the fourth comparator U2A and the fifth comparator U2B are all of the OPA1678 chip types.
The specific working principle of the female voice base judging unit 220 of the invention is that when a voice audio signal is sent by a female speaker, the amplified voice audio signal is coupled through a resistor R23, a resistor R27 and a capacitor C14 are matched to form a first-order low-pass filter to filter a high-frequency signal, and then a resistor R28 and a capacitor C16 are matched with a fourth comparator U2A to carry out a second-order filter treatment, so that a frequency point signal and a group delay signal which are relatively gentle and take 400Hz as a center are obtained, as shown in fig. 10; as shown in fig. 11, the group delay signal is coupled through a resistor R8 and then enters a step response circuit composed of a capacitor C13, a capacitor C15, a resistor R26 and a fifth comparator U2B, so as to obtain a value that the jump signal becomes closer to 0, as shown in fig. 12, at this time, the second triode Q3 is turned on, so that the output dell2_det signal of the female voice base judging unit 220 becomes 0 level, thereby obtaining a female voice base judging signal, and sending the female voice base judging signal to the signal processing module 300.
As shown in fig. 3, the signal processing module 300 includes an MCU module 310 and an audio processing module 320, where an input end of the MCU module 310 is connected to the voice recognition module 200, specifically, an input end of the MCU module 310 is connected to the male voice base determination unit 210 and the female voice base determination unit 220, where the male voice base determination unit 210 and the female voice base determination unit 220 are connected to different IO detection ports of the MCU module 310, respectively, so that the MCU module 310 can obtain a sound gender attribute result corresponding to the voice base determination signal according to an input signal at the IO detection port; the output end of the MCU module 310 is connected with the audio processing module 320, the audio processing module 320 is connected with the sound collecting module 100, the MCU module 310 stores preset EQ parameters, the MCU module 310 selects proper preset EQ parameters based on sound base judgment signals to send the parameters to the audio processing module 320, the sound collecting module 100 sends human voice audio signals to the audio processing module 320, the audio processing module 320 adjusts the human voice audio signals according to the preset EQ parameters to obtain human voice audio adjusting sounds, and further the sound expansion tone quality of the human voice audio signals is improved, and the sound effects of male or female voices are restored with higher quality.
When the male voice base judging unit 210 transmits the male voice base judging signal to the MCU module 310 through its corresponding IO detecting port, the MCU module 310 judges that the corresponding human voice audio signal is a male speaker; after the MCU module 310 determines the attribute of the gender of the voice, the preset EQ parameters corresponding to the male voice are sent to the audio processing module 320, the audio processing module 320 adjusts the voice audio signal to obtain the voice audio adjusting sound, so as to improve the sound expansion tone quality of the voice audio signal and restore the sound effect of the male voice or the female voice with higher quality.
In this embodiment, the specific process of the audio processing module 320 for adjusting the voice audio signal is: when the voice audio signal is in the frequency band of 150Hz-300Hz, the audio processing module 320 performs a gain boost of 3dB on the voice audio signal, and since the frequency band is the fundamental tone frequency of the bass of the men, if the frequency band is lacking, the tone color appears soft and waggling, and the voice becomes soft and continuous; when the voice audio signal is in the frequency range of 300Hz-500Hz, the audio processing module 320 carries out gain improvement of 1dB on the voice audio signal, the frequency amplitude is full, the voice is strong, if the frequency amplitude is insufficient, the voice appears hollow and is not firm; when the voice audio signal is in the frequency band of 500Hz-1KHz, the audio processing module 320 performs 1dB gain boost on the voice audio signal, the voice frequency point of the voice in the frequency band is full, the contour of the voice is clear, the overall sense is good, and if the frequency is insufficient, the voice can generate a contraction sense; through carrying out preset EQ parameter adjustment on main middle and low audio frequency sections of male voices, the male can adapt to the emotion expression at the time when speaking in different scenes, and meanwhile, the sound effect of male voices or female voices is effectively reduced.
When the female voice base judging unit 220 sends a female voice base judging signal to the MCU module 310 through its corresponding IO detection port, the MCU module 310 judges that the corresponding human voice audio signal is a female speaker; after the MCU module 310 determines the gender attribute of the voice, the preset EQ parameters corresponding to the female voice are sent to the audio processing module 320, the audio processing module 320 adjusts the voice audio signal to obtain the voice audio adjusting sound, so as to further improve the sound expansion tone quality of the voice audio signal, and restore the female voice or the female voice effect with higher quality.
In this embodiment, when the MCU module 310 determines that the corresponding voice audio signal is a female speaker, the specific process of adjusting the voice audio signal by the audio processing module 320 is: when the voice audio signal is in the frequency range of 300Hz-500Hz, the audio processing module 320 carries out gain improvement of 1dB on the voice audio signal, the frequency amplitude is full, the voice is strong, if the frequency amplitude is insufficient, the voice appears hollow and is not firm; when the voice audio signal is in the frequency band of 500Hz-1KHz, the audio processing module 320 performs 1dB gain boost on the voice audio signal, the frequency is plump, the contour of the voice is clear, the overall sense is good, and if the frequency is insufficient, the voice can generate a contraction sense; when the voice audio signal is in the frequency band of 1KHz-2KHz, the audio processing module 320 performs 1dB gain boost on the voice audio signal, the frequency range has obvious transparent feel and strong smooth feel, and if the frequency range Ping Lv is lacking, the tone color is loose and the tone color is disjointed; through carrying out preset EQ parameter adjustment on the main middle-high audio frequency section of female voice, female speaking in different scenes can adapt to the emotion expression at the time, and meanwhile, the female voice or the sound effect of the female voice is effectively reduced.
As shown in fig. 6, according to the above-mentioned automatic human voice restoration system of the present invention, the present invention provides an automatic human voice restoration method, and the sound collection module 100, the human voice recognition module 200 and the signal processing module 300 involved in the method can have the same technical features as those described in the above-mentioned embodiment of the automatic human voice restoration system, and can produce the same technical effects. According to the automatic human voice restoration method, the human voice identification module 200 is used for identifying the human voice audio signal to obtain the sound base judgment signal corresponding to the sound sex attribute, then the human voice audio signal is sent to the signal processing module 300, and the signal processing module 300 adjusts the human voice audio signal according to the sound base judgment signal through the preset EQ parameter, so that the sound expansion quality is improved, and the sound effect of male or female voices is restored with higher quality.
Fig. 6 is a schematic flow chart of an automatic human voice restoration method according to an embodiment of the present invention, as shown in fig. 6, the automatic human voice restoration method includes steps S110 to S130, specifically as follows:
step S110, collecting and processing a human voice audio signal through the sound collecting module 100; the sound collection module 100 processes the collected human voice audio signal to obtain a processed human voice audio signal.
Step S120, judging the voice audio signal through the voice recognition module 200 to obtain a sound base judgment signal; the voice base judging signals include a male voice base judging signal and a female voice base judging signal, the voice recognition module 200 includes a male voice base judging unit 210 and a female voice base judging unit 220, the male voice base judging unit 210 is configured to receive a voice audio signal and send the male voice base judging signal to the signal processing module 300; the female voice base determining unit 220 is configured to receive the human voice audio signal, and send the acquired female voice base determining signal to the signal processing module 300.
In step S130, based on the sound base determination signal, the signal processing module 300 adjusts the voice audio signal according to the preset EQ parameter to obtain the voice audio adjusting sound, so as to improve the sound amplifying quality of the voice audio signal and restore the sound effect of the male or female voice with higher quality.
Specifically, the signal processing module 300 includes an MCU module 310 and an audio processing module 320, and the male voice base determining unit 210 and the female voice base determining unit 220 are respectively connected to different IO detection ports of the MCU module 310, so that the MCU module 310 can obtain a sound gender attribute result corresponding to the voice base determining signal according to an input signal at the IO detection port.
In one embodiment, the method of step S130 includes the specific operations of:
when the male voice base judging unit 210 transmits the male voice base judging signal to the MCU module 310 through its corresponding IO detecting port, the MCU module 310 judges that the corresponding human voice audio signal is a male speaker; after the MCU module 310 determines the attribute of the gender of the voice, the preset EQ parameters corresponding to the male voice are sent to the audio processing module 320, the audio processing module 320 adjusts the voice audio signal to obtain the voice audio adjusting sound, so as to improve the sound expansion tone quality of the voice audio signal and restore the sound effect of the male voice or the female voice with higher quality.
In another embodiment, the method of step S130 includes the specific operations of:
when the female voice base judging unit 220 sends a female voice base judging signal to the MCU module 310 through its corresponding IO detection port, the MCU module 310 judges that the corresponding human voice audio signal is a female speaker; after the MCU module 310 determines the gender attribute of the voice, the preset EQ parameters corresponding to the female voice are sent to the audio processing module 320, the audio processing module 320 adjusts the voice audio signal to obtain the voice audio adjusting sound, so as to further improve the sound expansion tone quality of the voice audio signal, and restore the female voice or the female voice effect with higher quality.
In summary, according to the system and method for automatically restoring human voice provided by the invention, the human voice recognition module 200 recognizes the human voice audio signal to obtain the voice base judgment signal corresponding to the voice gender attribute, and then the human voice audio signal is sent to the signal processing module 300, and the signal processing module 300 adjusts the human voice audio signal according to the voice base judgment signal through the preset EQ parameters, so as to improve the sound expansion quality and restore the sound effect of male or female voice with higher quality.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (5)
1. An automatic human voice restoration system is characterized in that: the voice recognition system comprises a voice acquisition module, a voice recognition module and a signal processing module, wherein the voice acquisition module is respectively connected with the voice recognition module and the signal processing module, the voice recognition module is connected with the signal processing module, the voice acquisition module is used for acquiring voice audio signals and sending the voice audio signals to the voice recognition module and the signal processing module, the voice recognition module is used for recognizing the voice audio signals and sending voice base judgment signals to the signal processing module, and the signal processing module is used for adjusting the voice audio signals according to preset EQ parameters which are selected and adapted by the voice base judgment signals;
the voice recognition module comprises a male voice base judgment unit and a female voice base judgment unit which are arranged in parallel, wherein the voice base judgment signal comprises a male voice base judgment signal and a female voice base judgment signal, and the male voice base judgment unit is used for receiving a voice audio signal and sending the male voice base judgment signal to the signal processing module; the female voice base judging unit is used for receiving the voice audio signal and sending the acquired female voice base judging signal to the signal processing module;
the male sound base judging unit comprises resistors R1-R14, capacitors C1-C8, a second comparator U1A, a third comparator U1B and a first triode Q1, wherein the negative input end of the second comparator U1A is connected with one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C6 is connected with one end of a capacitor C8, one end of a resistor R9 and one end of a resistor R13, one end of the resistor R9 is connected with the output end MIC_OUT of a sound collecting module, the other end of the resistor R13 is grounded, the other end of the resistor R14 and the other end of the capacitor C8 are both connected with the output end of the second comparator U1A, the positive input end of the second comparator U1A is connected with one end of a resistor R6 and one end of a resistor R4, the other end of the resistor R6 is grounded, one end of a capacitor C2, one end of a capacitor C3 and the second analog power supply AVCC2 are connected with one end of the capacitor C1 and the other end of the power supply voltage VCC, and the other end of the capacitor C2 and the other end of the capacitor C3 are all grounded; the output end of the second comparator U1A is connected with a resistor R8, the resistor R8 is connected with one end of a resistor R11, one end of a capacitor C5 and one end of a capacitor C7, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected with the negative input end of the third comparator U1B and a resistor R12, the other end of the capacitor C7 and the other end of the resistor R12 are connected with the output end of the third comparator U1B, the positive input end of the third comparator U1B is connected with one end of a resistor R5 and one end of a resistor R3, the other end of the resistor R5 is grounded, and the resistor R3 is connected with a second analog power supply AVCC2; the output end of the third comparator U1B is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R10 and the base electrode of the first triode Q1, the other end of the resistor R10 is connected with the collector electrode of the first triode Q1 and one end of a resistor R2, the other end of the resistor R2 is connected with a power supply voltage VCC, and the emitter electrode of the first triode Q1 is grounded; wherein, the collector of the first triode Q1 corresponds to the output end DEL1_DET of the male voice base judging unit;
the female sound base judging unit comprises resistors R15-R28, capacitors C9-C16, a fourth comparator U2A, a fifth comparator U2B and a second triode Q3, wherein the negative input end of the fourth comparator U2A is connected with one end of a capacitor C14 and one end of a resistor R28, the other end of the capacitor C14 is connected with one end of the capacitor C16, one end of the resistor R23 and one end of the resistor R27, one end of the resistor R23 is connected with the output end MIC_OUT of the sound collecting module, the other end of the resistor R27 is grounded, the other end of the resistor R28 and the other end of the capacitor C16 are connected with the output end of the fourth comparator U2A, the positive input end of the fourth comparator U2A is connected with one end of the resistor R20 and one end of the resistor R18, the other end of the resistor R20 is grounded, one end of the other end of the resistor R18 is connected with one end of the resistor C10, one end of the capacitor C11 and the second analog power supply AVCC1, the other end of the resistor R15 is connected with one end of the capacitor C9 and the power supply voltage VCC 9, and the other end of the capacitor C10 and the other end of the capacitor C11 are grounded; the output end of the fourth comparator U2A is connected with a resistor R22, the resistor R22 is connected with one end of a resistor R25, one end of a capacitor C13 and one end of a capacitor C15, the other end of the resistor R25 is grounded, the other end of the capacitor C13 is connected with the negative input end of the fifth comparator U2B and a resistor R26, the other end of the capacitor C15 and the other end of the resistor R26 are connected with the output end of the fifth comparator U2B, the positive input end of the fifth comparator U2B is connected with one end of a resistor R19 and one end of a resistor R17, the other end of the resistor R19 is grounded, and the resistor R17 is connected with a second analog power supply AVCC2; the output end of the fifth comparator U2B is connected with one end of a capacitor C12, the other end of the capacitor C12 is connected with one end of a resistor R21, the other end of the resistor R21 is connected with one end of a resistor R24 and the base electrode of a second triode Q3, the other end of the resistor R24 is connected with the collector electrode of the second triode Q3 and one end of a resistor R16, the other end of the resistor R16 is connected with a power supply voltage VCC, and the emitter electrode of the second triode Q3 is grounded; wherein, the collector of the second triode Q3 corresponds to the output terminal dell2_det of the female voice base judging unit.
2. An automated human voice recovery system according to claim 1, wherein: the signal processing module comprises an MCU module and an audio processing module, wherein the input end of the MCU module is connected with the voice recognition module, the output end of the MCU module is connected with the audio processing module, and the audio processing module is connected with the sound acquisition module.
3. An automated human voice recovery system according to claim 2, wherein: the MCU module stores preset EQ parameters, and selects proper preset EQ parameters based on the sound base judgment signal and sends the parameters to the audio processing module.
4. An automatic human voice restoration system according to claim 1 or 2, wherein: the sound collection module comprises a first comparator U3B, resistors R29, R30, R31, R32, R33, R34, R35, R36, capacitors C17, C18, C19, C20, C21, C22, C23 and an ESD tube D1, wherein the negative input end of the first comparator U3B is connected with one end of the resistor R33, the other end of the resistor R33 is connected with one end of the capacitor C19, one end of the resistor C19 is connected with one end of the resistor R34 and one end of the capacitor C21, the other end of the resistor R34 is connected with one end of the resistor R32, one end of the capacitor C22 and one end of the ESD tube D1, the other end of the resistor R32 is connected with one end of the resistor R30 and one end of the capacitor C17, the other end of the resistor R30 is connected with a first analog power supply AVCC1, the capacitor C17 is connected with the resistor R29 in parallel, and the other end of the capacitor C17 is grounded; the positive input end of the first comparator U3B is connected with one end of a resistor R35 and one end of a resistor R36, the other end of the resistor R36 is connected with a reference voltage VREF, the other end of the resistor R35 is connected with one end of a capacitor C23, the other end of the capacitor C23 is connected with the other end of a capacitor C21, the other end of the capacitor C22 and the other end of an ESD tube D1, and the other end of the capacitor C23 is grounded; the output end of the first comparator U3B is connected with one end of a capacitor C20, one end of a resistor R31 and one end of a capacitor C18, the other end of the resistor R31 and the other end of the capacitor C18 are respectively connected with the negative input end of the first comparator U3B, the other end of the capacitor C20 corresponds to the output end MIC_OUT of the sound collection module, and one end of the capacitor C22 corresponds to the input end MIC_IN of the sound collection module.
5. An automatic human voice reduction method is characterized by comprising the following steps,
collecting and processing human voice audio signals through a sound collecting module;
judging the voice audio signal through a voice recognition module to obtain a voice base judgment signal;
based on the sound base judgment signal, the signal processing module adjusts the voice audio signal according to the preset EQ parameter to acquire voice audio adjusting sound;
the method for acquiring the voice audio adjusting sound comprises the following specific operations:
when the male voice base judging unit sends a male voice base judging signal to the MCU module through the corresponding IO detection port, the MCU module judges that the corresponding voice audio signal is a male speaker; after judging the attribute of the sound gender, the MCU module sends the preset EQ parameter corresponding to the male sound to the audio processing module, and the audio processing module carries out adjustment processing on the voice audio signal to obtain voice audio adjustment sound;
the method for acquiring the voice audio adjusting sound comprises the following specific operations:
when the female voice base judging unit sends a female voice base judging signal to the MCU module through the corresponding IO detection port, the MCU module judges that the corresponding voice audio signal is a female speaker; after judging the gender attribute of the voice, the MCU module sends the preset EQ parameters corresponding to the female voice to the audio processing module, and the audio processing module adjusts and processes the voice audio signal to obtain voice audio adjusting sound;
the male sound base judging unit comprises resistors R1-R14, capacitors C1-C8, a second comparator U1A, a third comparator U1B and a first triode Q1, wherein the negative input end of the second comparator U1A is connected with one end of a capacitor C6 and one end of a resistor R14, the other end of the capacitor C6 is connected with one end of a capacitor C8, one end of a resistor R9 and one end of a resistor R13, one end of the resistor R9 is connected with the output end MIC_OUT of a sound collecting module, the other end of the resistor R13 is grounded, the other end of the resistor R14 and the other end of the capacitor C8 are both connected with the output end of the second comparator U1A, the positive input end of the second comparator U1A is connected with one end of a resistor R6 and one end of a resistor R4, the other end of the resistor R6 is grounded, one end of a capacitor C2, one end of a capacitor C3 and the second analog power supply AVCC2 are connected with one end of the capacitor C1 and the other end of the power supply voltage VCC, and the other end of the capacitor C2 and the other end of the capacitor C3 are all grounded; the output end of the second comparator U1A is connected with a resistor R8, the resistor R8 is connected with one end of a resistor R11, one end of a capacitor C5 and one end of a capacitor C7, the other end of the resistor R11 is grounded, the other end of the capacitor C5 is connected with the negative input end of the third comparator U1B and a resistor R12, the other end of the capacitor C7 and the other end of the resistor R12 are connected with the output end of the third comparator U1B, the positive input end of the third comparator U1B is connected with one end of a resistor R5 and one end of a resistor R3, the other end of the resistor R5 is grounded, and the resistor R3 is connected with a second analog power supply AVCC2; the output end of the third comparator U1B is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with one end of a resistor R10 and the base electrode of the first triode Q1, the other end of the resistor R10 is connected with the collector electrode of the first triode Q1 and one end of a resistor R2, the other end of the resistor R2 is connected with a power supply voltage VCC, and the emitter electrode of the first triode Q1 is grounded; wherein, the collector of the first triode Q1 corresponds to the output end DEL1_DET of the male voice base judging unit; the female sound base judging unit comprises resistors R15-R28, capacitors C9-C16, a fourth comparator U2A, a fifth comparator U2B and a second triode Q3, wherein the negative input end of the fourth comparator U2A is connected with one end of a capacitor C14 and one end of a resistor R28, the other end of the capacitor C14 is connected with one end of the capacitor C16, one end of the resistor R23 and one end of the resistor R27, one end of the resistor R23 is connected with the output end MIC_OUT of the sound collecting module, the other end of the resistor R27 is grounded, the other end of the resistor R28 and the other end of the capacitor C16 are connected with the output end of the fourth comparator U2A, the positive input end of the fourth comparator U2A is connected with one end of the resistor R20 and one end of the resistor R18, the other end of the resistor R20 is grounded, one end of the other end of the resistor R18 is connected with one end of the resistor C10, one end of the capacitor C11 and the second analog power supply AVCC1, the other end of the resistor R15 is connected with one end of the capacitor C9 and the power supply voltage VCC 9, and the other end of the capacitor C10 and the other end of the capacitor C11 are grounded; the output end of the fourth comparator U2A is connected with a resistor R22, the resistor R22 is connected with one end of a resistor R25, one end of a capacitor C13 and one end of a capacitor C15, the other end of the resistor R25 is grounded, the other end of the capacitor C13 is connected with the negative input end of the fifth comparator U2B and a resistor R26, the other end of the capacitor C15 and the other end of the resistor R26 are connected with the output end of the fifth comparator U2B, the positive input end of the fifth comparator U2B is connected with one end of a resistor R19 and one end of a resistor R17, the other end of the resistor R19 is grounded, and the resistor R17 is connected with a second analog power supply AVCC2; the output end of the fifth comparator U2B is connected with one end of a capacitor C12, the other end of the capacitor C12 is connected with one end of a resistor R21, the other end of the resistor R21 is connected with one end of a resistor R24 and the base electrode of a second triode Q3, the other end of the resistor R24 is connected with the collector electrode of the second triode Q3 and one end of a resistor R16, the other end of the resistor R16 is connected with a power supply voltage VCC, and the emitter electrode of the second triode Q3 is grounded; wherein, the collector of the second triode Q3 corresponds to the output terminal dell2_det of the female voice base judging unit.
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