Timecode generation circuits, time coders and signal generation methods for time coders

Abstract

Exemplary embodiments of the present invention disclose a timecode generation circuit, a time coder, and a signal generation method for a time coder, wherein the circuit comprises: a terminal; a timecode switching module, wherein the timecode switching module is connected to the terminal; an amplitude adjustment module, wherein the amplitude adjustment module is connected to the timecode switching module; and a main control module, wherein the main control module is connected to the timecode switching module.the amplitude setting module is connected, the amplitude setting module is used to receive a timecode signal generated by the main control module and to adjust the amplitude in order to generate timecode signals with different amplitudes, and the timecode switching module is used to receive the timecode signal after the amplitude setting; wherein the main control module is used to receive an initial operating input to generate a timecode signal and to configure the timecode signal to be input into the amplitude setting module, and the timecode signal is transmitted to the terminal via the timecode switching module after the amplitude setting.

Description

Time code generating circuit, time code device and signal generating method of time code device Technical Field

[0001] The present invention relates to the technical field of time code synchronization, and in particular to a time code generating circuit, a time coder and a signal generating method of the time coder. Background Art

[0002] Timecode is a type of time-stamping technology that precisely labels video frames during filming. It works by counting the exact number of frames from the first to the last. By counting frames, timecode assigns a unique identifier to each frame. Each frame has a label consisting of the hour:minute:second:frame value. A typical filming process often involves multiple microphones, cameras, or video cameras.

[0003] In the above scenarios, for example, microphones or cameras themselves often do not have time code functions, so an additional time coder is used to output a time code signal. This time code signal can be input into cameras, mixing consoles and other devices to synchronize the time codes between devices, so as to better edit videos, audio, etc. However, as the shooting scene changes, the transmission of audio signals is usually involved. Usually, time code devices and audio devices are two independent devices, and time code signals and audio signals cannot coexist on the same port. When the same transmission line is used to transmit time code signals and audio signals, the value of this time code signal is always fixed. Since the time code signal and audio signal are often close in the circuit, it is difficult to accurately distinguish the two signals, causing mutual interference, reducing the accuracy of product functions and user efficiency.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a time code generation circuit, a time coder and a signal generation method for the time coder, aiming to solve the technical problem in the prior art that the signal transmitted by the port cannot adapt to different shooting scenes.

[0006] In a first aspect, an embodiment of the present invention provides a time code generation circuit, comprising:

[0007] port;

[0008] a time code switching module connected to the port;

[0009] an amplitude adjustment module, the amplitude adjustment module being connected to the time code switching module; and

[0010] a main control module, the main control module being connected to the time code switching module and the amplitude adjustment module respectively, the amplitude adjustment module being used to receive the time code signal generated by the main control module and perform amplitude adjustment to generate a time code signal with different amplitudes, and the time code switching module being used to receive the time code signal after amplitude adjustment;

[0011] Among them, the main control module is used to receive a first operation input to generate a time code signal and configure the time code signal to be input into the amplitude adjustment module for amplitude adjustment. The time code signal after amplitude adjustment is transmitted to the port through the time code switching module.

[0012] Among them, in the time code generation circuit, the circuit also includes an audio acquisition module, which is connected to the port and the main control module respectively, and the audio acquisition module acquires audio signals. The main control module is used to receive a second operation input to control the audio acquisition module so that the audio signal is transmitted to the port.

[0013] The main control module is configured to receive a third operation input to configure the port to receive an external time code signal, and the external time code signal is input to the main control module by the time code switching module.

[0014] In the time code generation circuit, the audio acquisition module includes a microphone and a first switch, the microphone is connected to the main control module and the first switch respectively, the first switch is connected to the port and the main control module respectively, the microphone collects the audio signal, and the main control module controls the first switch to be turned on to transmit the audio signal to the port.

[0015] In the time code generation circuit, a second switch and a time code constant circuit are provided in the time code switching module. The second switch is respectively connected to the port and the amplitude adjustment module. The time code constant circuit is electrically connected between the main control module and the second switch. The main control module is used to control the conduction of the second switch to configure the port to input an external time code signal or output the time code signal after amplitude adjustment. The amplitude of the external time code signal is different from the amplitude of the time code signal after amplitude adjustment. The time code constant circuit is used to receive the external time code signal and output a constant time code signal to send to the main control module.

[0016] Among them, in the time code generation circuit, a potentiometer is provided in the amplitude adjustment module, and the potentiometer is connected to the time code switching module and the main control module respectively. The main control module controls the potentiometer to adjust the amplitude of the time code signal.

[0017] Among them, in the time code generation circuit, a buffer is also provided in the amplitude adjustment module, and the buffer is respectively connected to the time code switching module and the main control module. The main control module controls the buffer to buffer the time code signal before amplitude adjustment.

[0018] Among them, in the time code generation circuit, a follower is also provided in the amplitude adjustment module, and the follower is respectively connected to the time code switching module and the main control module. The main control module controls the follower to realize the stable input of the time code signal after amplitude adjustment into the time code switching module.

[0019] Wherein, in the time code generation circuit, the port is any one of a TRRS port, a TypeC port, and a USB port.

[0020] Wherein, in the time code generating circuit, the circuit further includes a working mode switching module, the first operation input, the second operation input and the third operation input are generated by the working mode switching module (60), the working mode switching module is connected to the main control module, and is used to drive the main control module to generate a control signal to realize that the port is in a time code signal output mode, or a time code signal and audio signal simultaneous output mode, or a time code signal input mode.

[0021] Among them, in the time code generation circuit, an encoder is provided in the working mode switching module, and the encoder is connected to the main control module. The main control module generates the control signal through the switch button on the encoder to realize that the port is in the time code signal output mode, or the time code signal and audio signal simultaneous output mode, or the time code signal input mode.

[0022] In a second aspect, an embodiment of the present invention further provides a time code device, which includes a housing and any one of the time code generation circuits described above.

[0023] In a third aspect, an embodiment of the present invention further provides a signal generation method for a time coder, wherein the time coder includes the time code generation circuit as described above, and the method includes:

[0024] Turn on the power switch of the main control module;

[0025] Receiving a first operation input, the main control module generates a time code signal according to the first operation input and inputs the time code signal into the amplitude adjustment module for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port via the time code switching module;

[0026] receiving a second operation input, wherein the main control module controls the audio signal of the audio acquisition module to be transmitted to the port according to the second operation input;

[0027] A third operation input is received, and the main control module configures the port to receive an external time code signal according to the third operation input. The external time code signal is input to the main control module by the time code switching module.

[0028] An embodiment of the present invention provides a time code generation circuit, a time coder, and a signal generation method for the time coder. By setting only one port in the circuit and setting a time code switching module between a main control module and the port, and controlling the conduction of the time code switching module by the main control module, an external time code signal can be input into the main control module through the port. At the same time, an amplitude adjustment module is set between the main control module and the time switching module, so that a time code signal with amplitude adjustment can be output at the port. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] FIG1 is a simplified schematic diagram of a time code generating circuit according to an embodiment of the present invention;

[0031] FIG2 is a simplified schematic diagram of another embodiment of a time code generation circuit provided by an embodiment of the present invention;

[0032] FIG3 is a schematic diagram of an embodiment of an electrical connection port of an audio acquisition module provided by an embodiment of the present invention;

[0033] FIG4 is a schematic diagram of an embodiment of an electrical connection port of a time code switching module provided by an embodiment of the present invention;

[0034] FIG5 is a schematic diagram of an embodiment of an amplitude adjustment module provided in an embodiment of the present invention;

[0035] FIG6 is a simplified schematic diagram of another embodiment of a time code generation circuit provided by an embodiment of the present invention;

[0036] FIG7 is a schematic diagram of an embodiment of a working mode switching module provided in an embodiment of the present invention;

[0037] FIG8 is a simplified schematic diagram of another embodiment of a time code generation circuit provided by an embodiment of the present invention;

[0038] FIG9 is a schematic diagram of an embodiment of a Bluetooth module provided by an embodiment of the present invention;

[0039] FIG10 is a schematic diagram of an embodiment of a radio frequency module provided in an embodiment of the present invention;

[0040] FIG11 is a schematic diagram of time code synchronization provided by an embodiment of the present invention;

[0041] FIG12 is a schematic diagram of an embodiment of a main control module provided by an embodiment of the present invention;

[0042] FIG13 is a flow chart of an embodiment of a signal generation method for an encoder provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0045] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0046] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0047] The embodiments of the present invention provide a time code generating circuit and a time coder, which are described in detail below.

[0048] The time code generation circuit provided by the embodiment of the present invention may include:

[0049] Port 10;

[0050] A time code switching module 20 is connected to the port 10;

[0051] an amplitude adjustment module 30 connected to the time code switching module 20; and

[0052] The main control module 40 is connected to the time code switching module 20 and the amplitude adjustment module 30 respectively. The amplitude adjustment module 30 is used to receive the time code signal generated by the main control module 30 and perform amplitude adjustment to generate a time code signal with a different amplitude. For example, the amplitude can be increased to generate a time code signal with a larger amplitude than the original amplitude. Of course, it can also be said that the amplitude of the time code signal is reduced, etc. The time code switching module is used to receive the time code signal after amplitude adjustment.

[0053] It will be understood that the main control module 40 can be used to control the corresponding operations of other modules. The main control module is also used to generate a time code signal. The amplitude adjustment module can be used to receive the time code signal generated by the main control module 40 and adjust its amplitude. The amplitude of the adjusted time code signal is different from the amplitude of the time code signal directly generated by the main control module 40. The amplitude adjustment module 30 can send the amplitude-adjusted time code signal to the time code switching module. The time code switching module 20 is used to switch the input and / or output of the time code signal. For example, the time code switching module 20 can receive the time code signal adjusted by the amplitude adjustment module and output it to port 10. Of course, the time code switching module 20 is also used to receive an external time code signal (i.e., not generated by the main control module 40 of the time code device) and send it to the main control module 40, thereby achieving synchronization between the external time code signal and the time code signal of the main control module 40.

[0054] Among them, the main control module 40 is used to receive the first operation input, which can be an operation input from the user (such as operating a mechanical physical switch or operating an interactive interface through a touch screen) or automatic recognition by the machine. Of course, it can also be said that it can be an operation input such as voice, gesture, image recognition, etc. It can be understood that the operation input can include the input / output of the time code signal, the output of the time code signal and the audio signal, or the output of the audio signal, etc. For example, the corresponding menu bar of the display screen includes corresponding options. After the user selects and confirms the corresponding option, the corresponding working (signal input / output) mode can be entered. That is, the main control module 40 obtains different operation inputs from the user to make the port in different signal output modes. For example, the first operation input can include the time code signal output mode. At this time, the time code signal output mode can be a separate time code signal output or a time code signal and audio signal simultaneous output mode, etc. It can be understood that if the port 10 is in the time code signal output mode or the time code signal and audio signal simultaneous output mode, the main control module 40 can generate a time code signal and configure it to be input into the amplitude adjustment module 30 for amplitude adjustment. The time code signal after amplitude adjustment is transmitted to the port 10 via the time code switching module 20;

[0055] In some embodiments, the main control module 40 can also receive a second operation input, a third operation input, etc., where each input operation is different, such as different key options or different corresponding menu bars, etc. It can be understood that the main control module 40 is used to receive the third operation input to configure the port 10 to receive an external time code signal. The external time code signal is input to the main control module 40 by the time code switching module 20, that is, if the port 10 is in the time code signal input mode, the time code signal is transmitted to the time code switching module 20 via the port 10, and is transmitted to the main control module 40 via the time code switching module 20. It can be understood that by setting only one port 10 in the circuit, and setting a time code switching module 20 between the main control module 40 and the port 10, and controlling the conduction of the time code switching module 20 through the main control module 40, an external time code signal can be input into the main control module 40 through the port 10. At the same time, an amplitude adjustment module 30 is set between the main control module 40 and the time code switching module 20, so that the time code signal with amplitude adjustment can be output at the port 10, which solves the technical problem that the time code signal output at the port 10 interferes with the audio signal, and greatly improves the user's usage efficiency.

[0056] Please refer to Figure 1, which is a simplified schematic diagram of an embodiment of a time code generation circuit provided by an embodiment of the present invention. In Figure 1, port 10 can be in not only a time code signal output mode, but also a mode for simultaneously outputting a time code signal and an audio signal, a time code signal input mode, or an audio signal output mode. The audio signal can be collected by the audio acquisition module and input through port 10 to an audio device connected to port 10. The time code signal can also be input through port 10 to other devices capable of recognizing time code signals. Simultaneously, an external time code signal can also be input through port 10 to the main control module 40 via the time code switching module 20. Furthermore, when port 10 outputs a time code signal alone, the time code signal can be an amplitude-adjusted time code. When port 10 outputs a time code signal and an audio signal simultaneously, the time code signal can be an amplitude-adjusted time code signal, thereby reducing interference from the time code signal on the audio signal.

[0057] The main control module 40 can be an MCU (central processing unit) chip, and is electrically connected to other modules via multiple pins with different functions. Specifically, one end of the time code switching module 20 is electrically connected to a pin of the main control module 40, so that an externally generated time code signal is input into the main control module 40 via the time code switching module 20. The main control module 40 can also generate a time code signal and input the time code signal into the amplitude adjustment module 30 for amplitude adjustment. The amplitude adjustment module 30 is electrically connected to multiple pins of the main control module 40, so that the main control module 40 transmits the generated time code signal to the amplitude adjustment module 30, and controls the amplitude adjustment module 30 to adjust the time code signal through the main control module 40. After the amplitude adjustment module 30 inputs the amplitude-adjusted time code signal into the time code switching module 20, the main control module 40 controls the time code switching module 20 to output the amplitude-adjusted time code signal to the port 10.

[0058] In one embodiment, as shown in FIG2 , the time code generation circuit further includes an audio acquisition module 50, which is connected to the port 10 and the main control module 40, respectively. Specifically, one end of the audio acquisition module 50 is electrically connected to a pin of the main control module 40. After the audio acquisition module 50 acquires an audio signal, the main control module 40 receives a second operating input to generate a corresponding drive signal and controls the audio acquisition module 50 via the pin to directly input the audio signal into the port 10. In this embodiment, the pins of the main control module 40 electrically connected to the amplitude adjustment module 30, the time code switching module 20, and the audio acquisition module 50 are all different.

[0059] Please refer to Figure 3, which is a schematic diagram of an embodiment of the electrical connection port of an audio acquisition module provided by an embodiment of the present invention. As shown in Figure 3, the audio acquisition module 50 includes a microphone MC1 (microphone 1) and a first switch U1. One end of the microphone MC1 (or microphone) is connected to the main control module 40 and the first switch U1, respectively, and the other end is grounded. The first switch U1 is connected to the main control module 40 and the port 10, respectively. In this embodiment, the microphone MC1 is used to convert the collected sound into an audio electronic signal. The main control module 40 controls the first switch U1 to input the audio electronic signal into the port 10.

[0060] It should be noted that the microphone MC1 used in the present invention can be a carbon particle type, electromagnetic type, capacitor type, electret capacitor type, piezoelectric crystal type, piezoelectric ceramic type, silicon dioxide type, etc. The first switch U1 and the second switch U2 used in the present invention can be analog switches, and can also be switches controlled by the main control module 40 to achieve conduction. The port 10 can be any one of a TRRS (Tip-Ring-Ring-Sleeve) port, a Typec (USB-C, Type C Universal Serial Bus) port, and a USB (Universal Serial Bus) port. It can be selected according to actual conditions and is not specifically limited in this embodiment.

[0061] In the embodiment shown in Figure 3, the port 10 adopts a TRRS port, the first switch U1 is an analog switch, and the analog switch may include a pin B1, a pin VCC (power supply pin), a pin SELECT (selection pin) and a pin A. The audio acquisition module 50 may also include: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, and a capacitor C8.

[0062] Among them, one end of the capacitor C5, resistor R4 and capacitor C6 connected in parallel is electrically connected to pin B1, and the other end is grounded; one end of the microphone MC1 is grounded, and the other end is electrically connected to pin B1 through capacitor C1. The capacitor group in the first half of the above circuit can filter the power input to the microphone, and the capacitor group in the second half can well filter the audio signal collected by the microphone to reduce signal noise; one end of the capacitor C2, capacitor C3 and capacitor C4 connected in parallel is electrically connected to pin B1 through resistor R3 and capacitor C1 in sequence, and the other end is grounded; resistor R1, resistor R3 and capacitor C1 are electrically connected between pin B1 and a pin of the main control module 40, and pin B1 is electrically connected to capacitor C1 and resistor R2 in sequence, and then connected to a 3.3V power supply; pin A is electrically connected to the R end of the TRRS port through capacitor C7; pin VCC is connected to a 3.3V power supply and grounded through capacitor C8; the L end of the TRRS port is grounded through a bidirectional TVS diode D1, and the R end is grounded through a bidirectional TVS diode D2. When the audio signal passes through the capacitor C1 in the audio acquisition module 50, the main control module 40 enables the pin SELECT at the analog switch, and pin B1 is connected to pin A. The audio signal can then be input to the R end of the TRRS port through pin B1 and pin A in sequence, and the audio signal can be output to other devices through the male connector of the TRRS port.

[0063] Please refer to Figure 4, which is a schematic diagram of an embodiment of the electrical connection port of a time code switching module according to an embodiment of the present invention. As shown in Figure 4, a second switch U2 is provided in the time code switching module 20. After the time code signal is amplitude-adjusted by the amplitude adjustment module 30, the main control module 40 controls the second switch U2 to conduct, and the amplitude-adjusted time code signal is output to port 10 via the second switch U2. Of course, the time code switching module 20 also includes a time code constant circuit, which is electrically connected between the main control module 40 and the second switch U2. The time code constant circuit can receive an external time code signal from port 10. The amplitude of the external time code signal and the amplitude-adjusted time code signal can be different. After the external time code signal passes through the time code constant circuit, a constant time code signal is output to the main control module 40.

[0064] It can be understood that the time code constant circuit may include R4, R5, R8, C9 and Q1, one end of R4 and R8 is connected to the 3.3v power supply terminal, R8 and R5 are connected to pin 1 of Q1, the other end of R5 is connected to pin 2 of Q1, R4 is connected to pin 3 of Q1, and C9 is connected between pins 2 and 3 of Q1. Of course, the time code constant circuit may also include other peripheral circuits as shown in the figure. It can be understood that when the external time code signal is sometimes too small to be recognized, setting R4, R5, R8, C9 and Q1 can allow the time code signal of a specific amplitude to be recognized. For example, by setting the parameter values ​​of the above components, the recognition of the external time code can be limited. The amplitude of the code signal, for example, when the amplitude of the external time code signal is less than 0.5V, the external time code signal cannot be transmitted from the port to the main control module 40 and recognized. When the amplitude of the external time code signal is greater than 0.5V, for example, different amplitudes such as 2.8V, 3V, 3.3V, 3.5V, etc., a uniform constant output of 3.3V is given to the main control module 40. The external time code signal can be stably transmitted from the port to the main control module 40 and recognized. In some embodiments, R4, R5, R8, C9 and Q1 can also reduce the risk of the external time code signal being directly transmitted to the main control module 40 through the second switch U2, causing the main control module 40 to burn out.

[0065] In the embodiment shown in FIG4 , the port 10 is a TRRS port, the second switch U2 may be an analog switch, and the analog switch may include: pin B1, pin B0, pin VCC, pin SELECT, and pin A. The time code switching module 20 may also include a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R11, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, and an inductor L1.

[0066] Among them, pin B1 is electrically connected to the amplitude adjustment module 30 through resistor R9, pin B0 is electrically connected to the base of transistor Q1 through resistor R6 and capacitor C10 in sequence, and is connected to the 3.3V power supply after passing through resistor R6, capacitor C10, and resistor R8 in sequence, and is grounded through resistor R6, capacitor C10, and R5 in sequence. The collector of transistor Q1 is electrically connected to a pin of the main control module 40, which is connected to the 3.3V power supply through resistor R4 and is grounded through capacitor C9. The emitter of transistor Q1 is grounded; pin A is connected to the 3.3V power supply through resistor R4 and is grounded through capacitor C9. 11 is electrically connected to the L end of the TRRS port, and is also electrically connected to the negative pole of the Zener diode DZ1, and the positive pole of the Zener diode DZ1 is grounded; pin VCC is connected to a 3.3V power supply through the inductor L1, and one end of the capacitor C12 and the capacitor C13 in parallel is electrically connected to the pin VCC and the inductor L1 respectively, and the other end is grounded; pin SELECT is electrically connected to a pin of the main control module 40, and one end of the resistor R10 and the capacitor C11 in parallel is electrically connected to the pin SELECT and a pin of the main control module 40 respectively, and the other end is grounded. When the external time code signal is input to pin A of the analog switch through the L end of the TRRS port, the main control module 40 controls the conduction between pin A and pin B0, and the external time code signal passes through pin A and pin B0 in sequence, and is input into the main control module 40 through transistor Q1; when the time code signal generated by the main control module 40 needs to be output to the L end of the TRRS port, the time code signal needs to be input into the amplitude adjustment module 30 through the main control module 40 for amplitude adjustment, and the time code signal after amplitude adjustment is output to pin B1 of the analog switch through the amplitude adjustment module 30. At this time, the main control module 40 enables pin SELECT of the analog switch, and pin B1 is connected to pin A. The time code signal after amplitude adjustment can be input to the L end of the TRRS port through pin B1 and pin A in sequence.

[0067] Please refer to Figure 5, which is a schematic diagram of an embodiment of an amplitude adjustment module provided in an embodiment of the present invention. As shown in Figure 5, the amplitude adjustment module 30 is provided with a potentiometer U3. Potentiometer U3 can be electrically connected to the main control module 40 and is used to receive the time code signal from the main control module 40 and adjust the amplitude of the time code signal output. Among them, the potentiometer U3 in the present invention is preferably a digital potentiometer, but is not limited to digital potentiometers. It can also be a wirewound potentiometer, a synthetic carbon film potentiometer, an organic solid core potentiometer, a metal glass glaze potentiometer, a conductive plastic potentiometer, etc. The selection can be based on actual conditions and is not specifically limited in this embodiment.

[0068] In the embodiment shown in FIG5 , the potentiometer U3 is a digital potentiometer, which may include: a pin SCL (clock input pin), a pin SDA (data pin), a pin WA (wiper terminal of potentiometer A), a pin HA (high terminal of potentiometer A), a pin VDD (positive power supply pin), a pin A0, a pin A1, a pin A2, a pin VSS (negative power supply pin), a pin LB (low terminal of potentiometer B, low end of potentiometer B), a pin LA (low terminal of potentiometer A, low end of potentiometer A), a pin HB (high terminal of potentiometer B, the high end of potentiometer B), pin WB (wiper terminal of potentiometer B, the wiper of potentiometer B), wherein pin SCL, pin SDA, and pin HA are each electrically connected to a pin in the main control module 40 and the pins are different, pin WA is electrically connected to the time code switching module 20, pin VDD is connected to the 3.3V power supply through the inductor L2, and is grounded through capacitors C17 and capacitor C18 respectively, pin A0, pin A1, pin A2, pin VSS (negative power supply pin), pin LB (low end of potentiometer B), pin LA (low end of potentiometer A), pin HB, and pin WB are all grounded. When the main control module 40 inputs the generated time code signal into the amplitude adjustment module 30, the time code signal is input into the digital potentiometer via pin HA in the amplitude adjustment module 30, and at the same time, the digital potentiometer is controlled by pins SCL and SDA of the digital potentiometer to adjust the amplitude of the time code signal. The time code signal after amplitude adjustment is output to the time code switching module 20 via pin WA of the digital potentiometer. At this time, the main control module 40 controls the time code switching module 20 to be turned on, and the time code signal after amplitude adjustment can be output to port 10 via the time code switching module 20.

[0069] In the above embodiment, in addition to the potentiometer U3, the amplitude adjustment module 30 may also include a buffer U4 and a follower U5, wherein the follower U5 is respectively connected to the potentiometer U3 and the time code switching module 20 and is arranged between the potentiometer U3 and the time code switching module 20, and the buffer U4 is respectively connected to the potentiometer U3 and the main control module 40. The time code signal generated by the main control module 40 is input into the potentiometer U3 through the buffer U4 and the amplitude is adjusted. The time code after amplitude adjustment is input into the follower U5 and output to the second switch U2 of the time code switching module 20 through the follower U5. At this time, the main control module 40 controls the second switch U2 to be turned on, and the time code signal after amplitude adjustment can be output to the port 10 through the second switch U2.

[0070] Specifically, the follower U5 may be a voltage follower, which is used as a buffer stage and an isolation stage in the time code generation circuit, and is used to ensure that the amplitude-adjusted time code signal is stably input into the time code switching module 20 .

[0071] In the embodiment shown in FIG5 , the potentiometer U3 is a digital potentiometer, the buffer U4 may include pins VCC, Y, and A, and the follower U5 may include pins 1, 2, 3, 4, and 5. Pin A of the buffer U4 is electrically connected to a pin of the main control module 40, pin VCC is connected to a 3.3V power supply, and pin VCC is grounded via capacitor C19. Pin Y is electrically connected to pin HA of the digital potentiometer via resistors R12 and R13, respectively. Pin 1 of the follower U5 is electrically connected to pin WA of the digital potentiometer, pin 2 is grounded, pin 3 is electrically connected to pin 4 via resistor R14, pin 4 is electrically connected to a pin of the second switch U2, pin 4 is grounded via capacitor C16, and pin 5 is connected to a 3.3V power supply. Capacitors C14 and C15 are disposed between pin 5 and the 3.3V power supply, with one end of the parallel connection of capacitors C14 and C15 being grounded and the other end being electrically connected to pin 5 and connected to the 3.3V power supply. The main control module 40 buffers the generated time code signal through buffer U4, ensuring that a stable time code signal is received at pin HA of the digital potentiometer. Once the time code signal has been amplitude-adjusted by the digital potentiometer, it is input into follower U5 via pin WA of the digital potentiometer and then into second switch U2 via pin 4 of follower U5. At this point, the main control module 40 turns on second switch U2, and the amplitude-adjusted time code signal is output through second switch U2 to port 10.

[0072] In another embodiment, as shown in FIG6 , the time code generation circuit further includes: an operating mode switching module 60, which is electrically connected to the main control module 40 to drive the main control module 40 to generate a control signal to switch the operating mode of the time code generation circuit. The operating modes include, for example, port 10 outputting only an amplitude-adjusted time code signal; port 10 outputting only an audio signal; port 10 simultaneously outputting an amplitude-adjusted time code signal and an audio signal; port 10 inputting only a time code signal, etc. When a time code signal is input through port 10, the time code signal is input to the second switch U2 via port 10 and then to the main control module 40 via the second switch U2.

[0073] In some embodiments, the operating mode switching module 60 includes an encoder U6, which is electrically connected to the main control module 40. When the operating mode of the time code generation circuit needs to be switched, the main control module 40 simply generates a control signal based on the pulse signal generated by the encoder U6 to enable the port 10 to be in a time code signal output mode, a time code signal and audio signal simultaneous output mode, or a time code signal input mode.

[0074] Please refer to Figure 7, which is a schematic diagram of an embodiment of the working mode switching module provided in an embodiment of the present invention. As shown in Figure 7, encoder U6 includes pins 1, 2, 3, and 4. Pins 1, 3, and 4 are all connected to a pin of the main control module 40 and the pins are different. Pin 2 is grounded, pin 1 is connected to a 3.3V power supply via resistor R16, pin 3 is connected to a 3.3V power supply via resistor R17, and pin 4 is connected to a 3.3V power supply via resistor R18. When the working mode of the time code generation circuit is selected on encoder U6, the switch button on encoder U6 is closed, and pins 2 and 3 of encoder U6 are switched from disconnected to conductive. The main control module 40 generates a control signal based on the pulse signals at pins 1 and 4 to enable port 10 to be in time code signal output mode, time code signal and audio signal simultaneous output mode, or time code signal input mode.

[0075] In other embodiments of the invention, the time code generation circuit further includes a display module electrically connected to the main control module 40. The operating mode of the time code generation circuit is displayed on the display module, and the operating mode of the time code generation circuit can be switched by operating the encoder U6 in the display module. The display module may further include a first switching transistor and a second switching transistor, which form a half-bridge drive circuit to drive the display module.

[0076] In some embodiments, as shown in FIG8 , the time code generation circuit further includes a wireless module 70 , wherein the wireless module 70 is connected to the main control module 40 and is used to transmit the time code signal to achieve synchronization of the time code signal between the devices where the time code generation circuit is located.

[0077] In some embodiments, the wireless module 70 may include a Bluetooth module M1 and a radio frequency module M2. The Bluetooth module M1 and the radio frequency module M2 are both electrically connected to the main control module 40. Both the Bluetooth module M1 and the radio frequency module M2 can communicate with a terminal device (e.g., a mobile phone). The terminal device may be installed with an application program, and the user interacts with the application program to determine the master-slave target node between the devices where the time code generation circuit is located. At the same time, the radio frequency module M2 transmits or receives the time code signal to achieve time code synchronization between the devices. In some embodiments, in order to improve the efficiency of time code synchronization and reduce conflicts or delays in time code synchronization, the Bluetooth module M1 communicates with the terminal device while the radio frequency module M2 does not communicate with the terminal device. The radio frequency module M2 is used to communicate with radio frequency modules on other time code devices.

[0078] Please refer to Figure 9, which is a schematic diagram of an embodiment of a Bluetooth module provided by an embodiment of the present invention. In the embodiment shown in Figure 9, the Bluetooth module M1 includes: pin RST (reset pin), pin HCI-UART-TX (transmit pin), pin HCI-UART-RX (receive pin), pin V-BAT (battery voltage pin), pin VDDIO (chip IO power pin) and pin ANT (antenna pin), pin RST, pin HCI-UART-TX, pin HCI-UART-RX are respectively connected to a pin of the main control module 40 and the pins are different, pin V-BAT is electrically connected to pin VDDIO, and is connected to a 3.3V power supply, one end of the capacitor C21, capacitor C22 and capacitor C23 connected in parallel is connected to a 3.3V power supply, and the other end is electrically connected to pin V-BAT and pin VDDIO respectively, and pin ANT is electrically connected to antenna U7. Among them, the pin RST of the Bluetooth module M1 is connected to the main control module 40 to reset the Bluetooth module M1 through the main control module 40, and the pin HCI-UART-TX and pin HCI-UART-RX of the Bluetooth module M1 are connected to the main control module 40 to enable the Bluetooth module M1 to communicate with the application on the terminal device through the main control module 40.

[0079] Please refer to Figure 10, which is a schematic diagram of an embodiment of a radio frequency module provided by an embodiment of the present invention. In the embodiment shown in Figure 10, the radio frequency module M2 includes: pins CE (Chip Enable), CSN (Chip Select), IRQ (Interrupt Request), SCK (Serial Peripheral Interface Clock), MISO (Master In Slave Out), and MOSI (Master Out Slave In). Pins CE, CSN, IRQ, SCK, MISO, and MOSI are all connected to the main control module 40. Among them, the chip select signal is transmitted via pin CSN. Pin CE is used to control the operating mode of the radio frequency module M2, and its operating modes include: receiving mode, transmitting mode, standby mode, power-down mode, etc. Pin IPQ is used to interrupt and output a low level.

[0080] Specifically, as shown in Figure 11, when multiple devices where the time code generation circuit is located synchronize the time code signal, it is only necessary to communicate with the APP on the terminal device (such as a mobile phone) through the Bluetooth module M1 or the radio frequency module M2 in the device 1 to set the device 1 as the device of the target master node from the network system, and set other time code devices as the devices of the target slave node. The device 1 outputs the generated time code signal to the pin MOSI of the radio frequency module M2 through its main control module 40. At the same time, its main control module 40 also outputs the clock signal to the pin SCK of the radio frequency module M2. At this time, the time code signal and the clock signal can be output to the radio frequency module M2 of the device where the target slave node is located through the radio frequency module M2 in the device 1. The radio frequency module M2 inputs the received time code signal and clock signal into the main control module 40 connected to the radio frequency module M2 through the pin MISO of the radio frequency module M2, and realizes the synchronization of the time code signal in the device through the main control module 40.

[0081] Please refer to FIG. 12 , which is a schematic diagram of an embodiment of a main control module provided by an embodiment of the present invention. As shown in FIG12 , the main control module 40 is a single-chip microcomputer MCU, which may include pin PA8 (Pin A8, Pin A8), pin PA15 (Pin A15, Pin A15), pin PB1 (Pin B1, Pin B1), pin PB2 (Pin B2, Pin B2), pin PB3 (Pin B3, Pin B3), pin PB4 (Pin B4, Pin B4), pin PB7 (Pin B7, Pin B7), pin PB8 (Pin B8, Pin B8), pin PB9 (Pin B9, Pin B9), pin PC0 (Pin C0, Pin C0), pin PC1 (Pin C1, Pin C1), pin PC3 (Pin C3, Pin C3), pin PC12 (Pin C12, Pin C12), pin PC13 (Pin C13, Pin C13), pin PC14-OSC32-IN (Pin C14-32-bit Oscillator-Input), and pin PG9 (Pin G9, Pin G9), Pin PG10 (Pin G10, Pin G10), Pin PG13 (Pin G13, Pin G13). Among them, Pin PB1 is connected to Pin B1 of the analog switch in the audio acquisition module 50 to control the audio acquisition module 50 to output the audio signal in Port 10; Pin PB4 is connected to Pin B0 of the analog switch in the time code switching module 20 to receive the time code signal input by the time code switching module 20; Pin PA8 is connected to Pin A of the buffer U4 in the amplitude adjustment module 30 to output the time code signal to the amplitude adjustment module 30, Pin PB8 and Pin PB9 are respectively connected to Pin SCL and Pin SDA of the digital potentiometer in the amplitude adjustment module 30 to control the digital potentiometer to adjust the amplitude of the time code signal input to the digital potentiometer; Pin PC3, Pin PB3, Pin PA15 are respectively connected to the encoder in the working mode switching module 60 Pins 3, 4 and 1 of the encoder U6 are connected to realize the switching of the working mode of the time code generation circuit; pin PB2 is connected to pin RST of the Bluetooth module M1 to realize the reset of the Bluetooth module M1, and pin PC0 and pin PC1 are respectively connected to pin HCI-UART-TX and pin HCI-UART-RX of the Bluetooth module M1 to realize communication with the application on the device where the Bluetooth module M1 is located; pin PG13, pin PC13, pin PB7, pin PG9, pin PG10 and pin PC12 are respectively connected to pin IPQ, pin CE, pin CSN, pin SCK, pin MISO and pin MOSI of the RF module M2 to realize the transmission of time code signals and realize time code synchronization through the application.

[0082] In other embodiments of the invention, the time code generation circuit may further include a charging module, a charging interface, a voltage conversion module, and a power supply module. The charging module is electrically connected to the charging interface, the voltage conversion module, and the main control module 40, respectively. The power supply module is electrically connected to the voltage conversion module, the main control module 40, the display module, the radio frequency module M2, and the Bluetooth module M1, respectively.

[0083] Specifically, the charging module is equipped with terminals for placing batteries and a charging chip. The voltage conversion module can boost the voltage output by the battery to a preset voltage (for example, 4.4V) and power the main control module 40, display module, RF module M2, and Bluetooth module M1 through the power supply module. The charging chip is electrically connected to the charging interface via a socket, and the charging chip is connected to the terminal to charge the battery in the terminal. The charging chip is also electrically connected to the main control module 40 to power the time code generation circuit. The charging interface can be a Type-C interface in the USB interface.

[0084] In other embodiments of the invention, the power supply module may further include a first power supply module, a second power supply module, and a third power supply module. The first power supply module is electrically connected to the main control module 40 and is used to supply power to the main control module 40; the second power supply module is electrically connected to the display module and the Bluetooth module M1 and is used to supply power to the display module and the Bluetooth module M1; and the third power supply module is electrically connected to the radio frequency module M2 and is used to supply power to the radio frequency module M2.

[0085] In other embodiments of the invention, the time code generation circuit further includes an upgrade module, which is used to upgrade the interface module. The upgrade module is electrically connected to the main control module 40, and the main control module 40 controls the upgrade module to upgrade the interface module.

[0086] An embodiment of the present invention further provides a time code device, which includes a housing and any one of the time code generation circuits described above.

[0087] In some embodiments of the present invention, the time code generation circuit in the time coder includes:

[0088] Port 10;

[0089] A time code switching module 20 is connected to the port 10;

[0090] an amplitude adjustment module 30 connected to the time code switching module 20; and

[0091] The main control module 40 is connected to the time code switching module 20 and the amplitude adjustment module 30 respectively;

[0092] If the port 10 is in the time code signal output mode or the time code signal and audio signal simultaneous output mode, the main control module 40 inputs the time code signal into the amplitude adjustment module 30 for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port 10 via the time code switching module 20;

[0093] If the port 10 is in the time code signal input mode, the time code signal is transmitted to the time code switching module 20 via the port 10 , and then transmitted to the main control module 40 via the time code switching module 20 .

[0094] The time code device of the embodiment of the present invention provides only one port 10 in the circuit, and provides a time code switching module 20 between the main control module 40 and the port. The main control module 40 controls the conduction of the time code switching module 20, thereby enabling an external time code signal to be input into the main control module 40 through the port 10. At the same time, an amplitude adjustment module 30 is provided between the main control module 40 and the time code switching module 20, so that the port 10 can output a time code signal with an adjusted amplitude. This solves the technical problem of the time code signal output from the port 10 interfering with the audio signal, thereby greatly improving user efficiency.

[0095] In order to better implement the time code generation circuit in the embodiment of the present application, based on the time code generation circuit, the embodiment of the present application also provides a signal generation method for a time code device, the time code device includes the time code generation circuit as described above, as shown in FIG13, the method comprising the following steps:

[0096] S101, turning on the power switch of the main control module 40;

[0097] S102: Receive a first operation input. The main control module 40 generates a time code signal according to the first operation input and inputs the time code signal to the amplitude adjustment module 30 for amplitude adjustment. The time code signal after amplitude adjustment is transmitted to the port 10 via the time code switching module 20.

[0098] S103: receiving a second operation input, the main control module 40 controls the audio signal of the audio acquisition module 50 to be transmitted to the port 10 according to the second operation input;

[0099] S104 , receiving a third operation input. The main control module 40 configures the port 10 to receive an external time code signal according to the third operation input. The external time code signal is input to the main control module 40 by the time code switching module 20 .

[0100] It is understood that the first, second, and third input operations described above can correspond to different signal output modes. The specific output modes can be found in the description of the above embodiment and will not be repeated here. The above steps are not limited to the order of priority, and the user can independently select the corresponding working mode and the corresponding input operation.

[0101] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to implement as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments and will not be repeated here.

[0102] The above describes in detail a time code generation circuit, a time coder, and a signal generation method for a time coder provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and embodiments of the present invention. The description of the above embodiments is only intended to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there may be changes in the specific embodiments and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A time code generating circuit, wherein: include: port(10); A time code switching module (20), the time code switching module (20) is connected to the port (10); an amplitude adjustment module (30), the amplitude adjustment module (30) being connected to the time code switching module (20); as well as a main control module (40), the main control module (40) being connected to the time code switching module (20) and the amplitude adjustment module (30) respectively, the amplitude adjustment module (30) being used to receive the time code signal generated by the main control module (30) and to perform amplitude adjustment to generate a time code signal with a different amplitude, and the time code switching module being used to receive the time code signal after amplitude adjustment; The main control module (40) is used to receive a first operation input to generate a time code signal and configure the time code signal to be input into the amplitude adjustment module (30) for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port (10) via the time code switching module (20).

2. The time code generating circuit according to claim 1, wherein: The circuit further comprises an audio acquisition module (50), the audio acquisition module (50) being connected to the port (10) and the main control module (40) respectively, the audio acquisition module (50) acquiring an audio signal, and the main control module (40) being used to receive a second operation input to control the audio signal of the audio acquisition module (50) to be transmitted to the port (10).

3. The time code generating circuit according to claim 1, wherein: The main control module (40) is used to receive a third operation input to configure the port (10) to receive an external time code signal, and the external time code signal is input to the main control module (40) by the time code switching module (20).

4. The time code generating circuit according to claim 2, wherein: The audio acquisition module (50) comprises a microphone (MC1) and a first switch (U1); the microphone (MC1) is connected to the main control module (40) and the first switch (U1) respectively; the first switch (U1) is connected to the port (10) and the main control module (40) respectively; the microphone (MC1) acquires the audio signal; the main control module (40) is used to control the first switch (U1) to be turned on so as to transmit the audio signal to the port (10).

5. The time code generating circuit according to claim 1, wherein: The time code switching module (20) is provided with a second switch (U2) and a time code constant circuit. The second switch (U2) is respectively connected to the port (10) and the amplitude adjustment module (30). The time code constant circuit is electrically connected between the main control module (40) and the second switch (U2). The main control module (40) is used to control the second switch (U2) to be turned on, so as to configure the port (10) to input an external time code signal, or to configure the port (10) to output the time code signal after amplitude adjustment. The amplitude of the external time code signal is different from the amplitude of the time code signal after amplitude adjustment. The time code constant circuit is used to receive the external time code signal and output a constant time code signal to be sent to the main control module (40).

6. The time code generating circuit according to claim 1, wherein: The amplitude adjustment module (30) is provided with a potentiometer (U3), the potentiometer (U3) is respectively connected to the time code switching module (20) and the main control module (40), and the main control module (40) controls the potentiometer (U3) to adjust the amplitude of the time code signal.

7. The time code generating circuit according to claim 1, wherein: The amplitude adjustment module (30) is further provided with a buffer (U4), the buffer (U4) being connected to the time code switching module (20) and the main control module (40) respectively, and the main control module (40) controlling the buffer (U4) to achieve buffering of the time code signal before amplitude adjustment.

8. The time code generating circuit according to claim 1, wherein: The amplitude adjustment module (30) is further provided with a follower (U5), and the follower (U5) is respectively connected to the time code switching module (20) and the main control module (40), and the main control module (40) controls the follower (U5) to achieve stable input of the time code signal after amplitude adjustment into the time code switching module (20).

9. The time code generating circuit according to claim 1, wherein: The port (10) is any one of a TRRS port, a TypeC port, and a USB port.

10. The time code generating circuit according to claim 1, wherein: The circuit further comprises a working mode switching module (60), wherein the first operation input, the second operation input and the third operation input are generated by the working mode switching module (60), and the working mode switching module (60) is connected to the main control module (40) and is used to drive the main control module (40) to generate a control signal to realize that the port (10) is in a time code signal output mode, a time code signal and an audio signal simultaneous output mode, or a time code signal input mode.

11. The time code generating circuit according to claim 10, wherein: The working mode switching module (60) is provided with an encoder (U6), and the encoder (U6) is connected to the main control module (40). The main control module (40) generates the control signal through the pulse signal of the encoder (U6) to realize that the port (10) is in a time code signal output mode, or a time code signal and audio signal simultaneous output mode, or a time code signal input mode.

12. A time coder, wherein: The time code device includes a housing, and port(10); A time code switching module (20), the time code switching module (20) is connected to the port (10); an amplitude adjustment module (30), the amplitude adjustment module (30) being connected to the time code switching module (20); as well as a main control module (40), the main control module (40) being connected to the time code switching module (20) and the amplitude adjustment module (30) respectively, the amplitude adjustment module (30) being used to receive the time code signal generated by the main control module (30) and to perform amplitude adjustment to generate a time code signal with a different amplitude, and the time code switching module being used to receive the time code signal after amplitude adjustment; The main control module (40) is used to receive a first operation input to generate a time code signal and configure the time code signal to be input into the amplitude adjustment module (30) for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port (10) via the time code switching module (20).

13. The time coder according to claim 12, wherein: The circuit further comprises an audio acquisition module (50), the audio acquisition module (50) being connected to the port (10) and the main control module (40) respectively, the audio acquisition module (50) acquiring an audio signal, and the main control module (40) being used to receive a second operation input to control the audio signal of the audio acquisition module (50) to be transmitted to the port (10).

14. The time coder according to claim 12, wherein: The main control module (40) is used to receive a third operation input to configure the port (10) to receive an external time code signal, and the external time code signal is input to the main control module (40) by the time code switching module (20).

15. The time coder according to claim 13, wherein: The audio acquisition module (50) comprises a microphone (MC1) and a first switch (U1); the microphone (MC1) is connected to the main control module (40) and the first switch (U1) respectively; the first switch (U1) is connected to the port (10) and the main control module (40) respectively; the microphone (MC1) acquires the audio signal; the main control module (40) is used to control the first switch (U1) to be turned on so as to transmit the audio signal to the port (10).

16. The time coder according to claim 12, wherein: The time code switching module (20) is provided with a second switch (U2) and a time code constant circuit. The second switch (U2) is respectively connected to the port (10) and the amplitude adjustment module (30). The time code constant circuit is electrically connected between the main control module (40) and the second switch (U2). The main control module (40) is used to control the second switch (U2) to be turned on, so as to configure the port (10) to input an external time code signal, or to configure the port (10) to output the time code signal after amplitude adjustment. The amplitude of the external time code signal is different from the amplitude of the time code signal after amplitude adjustment. The time code constant circuit is used to receive the external time code signal and output a constant time code signal to be sent to the main control module (40).

17. The time coder according to claim 12, wherein: The amplitude adjustment module (30) is provided with a potentiometer (U3), the potentiometer (U3) is connected to the time code switching module (20) and the main control module (40), and the main control module (40) controls the potentiometer (U3) to adjust the amplitude of the time code signal; The amplitude adjustment module (30) is further provided with a buffer (U4), the buffer (U4) being connected to the time code switching module (20) and the main control module (40) respectively, and the main control module (40) controlling the buffer (U4) to achieve buffering of the time code signal before amplitude adjustment.

18. The time coder according to claim 12, wherein: The amplitude adjustment module (30) is further provided with a follower (U5), the follower (U5) being connected to the time code switching module (20) and the main control module (40), respectively, and the main control module (40) controlling the follower (U5) to achieve stable input of the time code signal after amplitude adjustment into the time code switching module (20); Wherein, the port (10) is any one of a TRRS port, a TypeC port, and a USB port.

19. The time coder according to claim 12, wherein: The circuit further comprises a working mode switching module (60), wherein the first operation input, the second operation input and the third operation input are generated by the working mode switching module (60), the working mode switching module (60) is connected to the main control module (40), and is used to drive the main control module (40) to generate a control signal to realize that the port (10) is in a time code signal output mode, a time code signal and an audio signal simultaneous output mode, or a time code signal input mode; The working mode switching module (60) is provided with an encoder (U6), the encoder (U6) is connected to the main control module (40), and the main control module (40) generates the control signal through the pulse signal of the encoder (U6) to realize that the port (10) is in a time code signal output mode, or a time code signal and audio signal simultaneous output mode, or a time code signal input mode.

20. A signal generation method for a time coder, the time coder comprising: port(10); A time code switching module (20), the time code switching module (20) is connected to the port (10); an amplitude adjustment module (30), the amplitude adjustment module (30) being connected to the time code switching module (20); as well as a main control module (40), the main control module (40) being connected to the time code switching module (20) and the amplitude adjustment module (30) respectively, the amplitude adjustment module (30) being used to receive the time code signal generated by the main control module (30) and to perform amplitude adjustment to generate a time code signal with a different amplitude, and the time code switching module being used to receive the time code signal after amplitude adjustment; The main control module (40) is used to receive a first operation input to generate a time code signal and configure the time code signal to be input into the amplitude adjustment module (30) for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port (10) via the time code switching module (20); The method comprises: Turn on the power switch of the main control module (40); Receiving a first operation input, the main control module (40) generates a time code signal according to the first operation input and inputs the time code signal into the amplitude adjustment module (30) for amplitude adjustment, and the time code signal after amplitude adjustment is transmitted to the port (10) via the time code switching module (20); Receiving a second operation input, the main control module (40) controls the audio signal of the audio acquisition module (50) to be transmitted to the port (10) according to the second operation input; A third operation input is received, and the main control module (40) configures the port (10) to receive an external time code signal according to the third operation input. The external time code signal is input to the main control module (40) by the time code switching module (20).

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