Multifunctional time code synchronization device

Abstract

The utility model discloses a multifunctional time code synchronizer, which comprises an MCU (Microprogrammed Control Unit) module, a control panel connected with the MCU module, a power supply module connected with the MCU module, a plurality of interface modules and an interface circuit connected between the interface modules and the MCU module, the interface module at least comprises an MIDI IN interface and an MIDI OUT interface which can be used for transmitting an MIDI time code, an LTC IN interface and an LTC OUT interface which can be used for transmitting an SMPTE LTC time code, and an Ethernet port which can be used for transmitting an RTP MIDI time code and an ArtTimecode time code, and the MCU module can transmit and synchronize corresponding time code information through an interface circuit connected with the MIDI IN interface, the MIDI OUT interface, the LTC IN interface, the LTC OUT interface and the Ethernet port. Compared with the prior art, the device has the synchronization of the MIDI time code and the SMPTE LTC time code, and also has the network time codes of the ArtTimecode and the RTP-MIDI, so that the LTC time code can be transmitted more flexibly.

Description

Technical Field

[0001] This utility model relates to the field of electronic musical instruments, and in particular to a multifunctional timecode synchronization device. Background Technology

[0002] Currently, performances in public venues rely heavily on digital music, lighting, and program control software. To synchronize various performance equipment and software, timecode is used for synchronization. Since different stage equipment uses different timecode interfaces, timecode synchronization devices are needed to synchronize these devices.

[0003] Existing timecode synchronization devices only have interfaces for MIDI timecode and SMPTE LTC timecode, and do not support ArtTimecode and RTP-MIDI timecode. ArtTimecode is one of the timecodes used to synchronize stage equipment over a network. RTP-MIDI timecode is used to synchronize the timecode of digital musical instruments and their software over a network.

[0004] SMPTE LTC is an analog audio format that carries timecode information. Existing timecode synchronization devices with SMPTE LTC interfaces can only convert SMPTE LTC to MIDI timecode, not to digital audio, thus limiting the transmission of SMPTE LTC timecode on computer devices.

[0005] During live performances, in order to reduce cabling, network cables not only need to communicate but also often need to power the equipment. Existing timecode synchronization devices cannot be powered by the network.

[0006] Therefore, how to design a multifunctional timecode synchronization device that can synchronize MIDI timecode and SMPTELTC timecode, as well as network timecode of ArtTimecode and RTP-MIDI, and can transmit LTC timecode more flexibly, is a technical problem that the industry urgently needs to solve. Utility Model Content

[0007] To address the issue that existing timecode synchronization devices only have interfaces for MIDI timecode and SMPTE LTC timecode, and lack ArtTimecode and RTP-MIDI timecode, this invention proposes a multifunctional timecode synchronization device.

[0008] The technical solution of this utility model is to propose a multifunctional time code synchronization device, including an MCU module, a control panel connected to the MCU module, and a power module connected to the MCU module, as well as multiple interface modules and an interface circuit connected between the interface modules and the MCU module;

[0009] The interface module includes at least a MIDI IN interface and a MIDI OUT interface for transmitting MIDI timecode, an LTC IN interface and an LTC OUT interface for transmitting SMPTE LTC timecode, and an Ethernet port for transmitting RTP MIDI timecode and ArtTimecode timecode. The MCU module can transmit and synchronize the corresponding timecode information through the interface circuit connected to the MIDI IN interface, MIDI OUT interface, LTC IN interface, LTC OUT interface, and Ethernet port.

[0010] Furthermore, the control panel consists of two four-digit LED displays, an LED display circuit, a display screen interface, a motherboard interface, an encoder circuit, and power switches.

[0011] The four-digit LED display is used to display time code information;

[0012] The display screen interface is used to connect to the display screen and to display the working status of the multi-functional timecode synchronization device.

[0013] The encoder circuit has a button function for configuring the operating parameters of the multi-functional time code synchronization device;

[0014] The motherboard interface is used to connect to the MCU module and to communicate with the MCU module.

[0015] Furthermore, the power module includes a DC power supply circuit, a power on / off circuit, a 5V negative voltage circuit, a 3.3V voltage regulator circuit, and a 5V isolation circuit.

[0016] The DC power supply circuit is connected between the DC power socket and the MCU module, and converts the externally input 12V voltage into 5V voltage.

[0017] The power on / off circuit is connected to the power switch button on the control panel and is used to perform the power on / off action;

[0018] The 5V negative voltage circuit is used to power the LTC output circuit;

[0019] The 3.3V voltage regulator circuit is used to regulate the 5V voltage to 3.3V.

[0020] The 5V isolation circuit is used to isolate digital power and analog power.

[0021] Furthermore, the interface circuit includes a network port circuit connected to the Ethernet port, and the network port circuit is also connected to a PoE circuit for supplying power to the Ethernet port.

[0022] The network port circuit includes: resistors R53, R54, R55, R56, R67, R68, and R69; capacitors C50, C53, C55, C56, C58, and C59; an Ethernet transformer H1102NL; and a network interface RJ45-LED.

[0023] One end of capacitor C53 is connected to a 3.3V power supply, and the other end of capacitor C53 is grounded. The first end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R56. The second end of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The third end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R55. The sixth end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R54. The seventh end of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The eighth end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R53. The ninth end of the Ethernet transformer H1102NL is connected to the RX pin of the RJ45-LED network interface. The Ethernet transformer... The tenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the RXCM terminal. The eleventh terminal of the Ethernet transformer H1102NL is connected to the RX+ pin of the RJ45-LED network interface. The fourteenth terminal of the Ethernet transformer H1102NL is connected to the TX- pin of the RJ45-LED network interface. The fifteenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the TXCM terminal. The sixteenth terminal of the Ethernet transformer H1102NL is connected to the TX+ pin of the RJ45-LED network interface. One end of the capacitor C55 is connected between the tenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of the capacitor C55 is grounded. One end of the capacitor C56 is connected between the fifteenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of the capacitor C56 is grounded.

[0024] The GND pin of the RJ45-LED network interface is grounded after being connected in series with resistor R69. The YLED+ and GLED+ pins of the RJ45-LED network interface are connected to a 3.3V power supply. The YLED- pin of the RJ45-LED network interface is connected to the ELED pin of the MCU module after being connected in series with resistor R68. The GLED- pin of the RJ45-LED network interface is connected to the ELINK pin of the MCU module after being connected in series with resistor R67. The multiple NC pins of the RJ45-LED network interface are respectively connected to the PoE circuit as RJ45 terminals and RJ78 terminals.

[0025] Furthermore, the PoE circuit includes: resistors R53, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R79, and R81; capacitors C42, C43, C44, C45, C46, ​​C47, C48, C49, C51, C52, C54, and C57; diodes D7, D8, and D9; Zener diode ZD1; inductor L7; transformer T2; rectifier bridge B1; rectifier bridge B2; and DC / DC controller U7.

[0026] The TXCM terminal and the RXCM terminal are respectively connected to the first and third terminals of the rectifier bridge B1. The RJ78 terminal and the RJ45 terminal are respectively connected to the first and third terminals of the rectifier bridge B2. The fourth terminals of the rectifier bridge B1 and the rectifier bridge B2 are connected in series with the inductor L7 and connected to the second terminal of the transformer T2. The second terminal of the rectifier bridge B1 is connected to the positive terminal of the Zener diode ZD1. The negative terminal of the Zener diode ZD1 is connected between the inductor L7 and the fourth terminal of the rectifier bridge B1. The second terminal of the rectifier bridge B1 is connected between the first terminal of the rectifier bridge B1 and the positive terminal of the Zener diode ZD1.

[0027] The DET pin of the DC / DC controller U7 is connected in series with resistor R59 and then between the fourth terminal of the rectifier bridge B1 and the inductor L7. The CLS pin of the DC / DC controller U7 is connected in series with resistor R60 and then between the second terminal of the rectifier bridge B1. The VSS pin of the DC / DC controller U7 is connected between resistor R60 and the second terminal of the rectifier bridge B1. The VCC pin of the DC / DC controller U7 is connected to the power supply of the PoE circuit. The SW pin of the DC / DC controller U7 is connected to the positive terminal of diode D9. The negative terminal of diode D9 is connected to one end of resistor R58 and one end of capacitor C46. The other end of resistor R58 and capacitor C46 are connected to... The other end of 6 is connected between the inductor L7 and the second end of the transformer T2. The VDD pin of the DC / DC controller U7 is connected between the inductor L7 and the second end of the rectifier bridge B1. The NC pin of the DC / DC controller U7 is unused. The GND pin of the DC / DC controller U7 is grounded. The CS pin of the DC / DC controller U7 is connected to ground after being connected in series with the resistor R61. The FB pin of the DC / DC controller U7 is connected to the positive terminal of the diode D8 after being connected in series with the resistor R63 and the resistor R62. The negative terminal of the diode D8 is connected to the power supply of the PoE circuit. The COMP pin of the DC / DC controller U7 is connected to ground after being connected in series with the resistor R66 and the capacitor C57.

[0028] One end of capacitor C48 is connected between inductor L7 and the fourth terminal of rectifier bridge B1, and the other end of capacitor C48 is connected between the second terminal of rectifier bridge B1 and resistor R60 and then grounded. One end of capacitors C43 and C44 is connected between inductor L7 and the fourth terminal of rectifier bridge B1, and the other end of capacitors C43 and C44 is grounded. One end of resistor R57 is connected to the power supply of the PoE circuit, and the other end of resistor R57 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. One end of capacitor C45 is connected between inductor L7 and the second terminal of transformer T2, and the other end of capacitor C45 is grounded. Resistor R65 is connected in parallel across resistor R63. One end of resistor R64 and capacitor C54 is connected between the FB pin of DC / DC controller U7 and resistor R63, and the other end of resistor R64 and capacitor C54 is grounded.

[0029] The first terminal of transformer T2 is connected between the anode of diode D9 and the SW pin of DC / DC controller U7. The third terminal of transformer T2 is connected to the anode of diode D7, and the cathode of diode D7 is connected to the anode of diode D6. The cathode of diode D6 outputs a 12V voltage. The fourth terminal of transformer T2 is grounded. One end of resistor R52 is connected between the third terminal of transformer T2 and the anode of diode D7, and the other end of resistor R52 is connected in series with capacitor C42 and then connected to the diode. Between the negative terminal of diode D7 and the positive terminal of diode D6, one end of capacitor C49 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of capacitor C49 is grounded. One end of capacitor C47 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of capacitor C47 is connected to ground after being connected in series with capacitor C52. One end of resistor R79 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of resistor R79 is connected to ground after being connected in series with resistor R81.

[0030] Furthermore, the interface circuit includes an LTC input circuit connected to the LTC IN interface;

[0031] The LTC input circuit includes: resistors R1, R2, R4, R6, R8, R10, R11, R12, R13, R14, R15, R16, R18, potentiometer R80, capacitors C1, C3, and C4, filters L1, L2, and L3, XLR connector J1, comparator U1A, and comparator U1B;

[0032] One end of resistor R4 is connected to a 5V voltage, and the other end of resistor R4 is connected in series with resistor R14 and then grounded. One end of resistor R6 is connected to a 5V voltage, and the other end of resistor R6 is connected in series with resistor R13 and then grounded. The non-inverting input of comparator U1A is connected between resistor R4 and resistor R14. The inverting input of comparator U1A is connected in series with resistor R8, capacitor C1, and filter L1 and then connected to the third terminal of XLR connector J1. The output of comparator U1A is connected in series with resistor R10 and then connected to the non-inverting input of comparator U1B. The inverting input of comparator U1B is connected between resistor R6 and resistor R13. The output of comparator U1B is connected in series with resistor R11 and then connected to the LTC. The IN interface has one end of resistor R2 connected between resistor R11 and the output of comparator U1B, and the other end of resistor R2 connected between resistor R10 and the non-inverting input of comparator U1B. The third end of potentiometer R80 is connected in series with resistor R1 and then connected between resistor R10 and the output of comparator U1A. The second end of potentiometer R80 is connected between resistor R8 and the inverting input of comparator U1A. One end of capacitor C4 is connected to a 5V power supply, and the other end of capacitor C4 is grounded. The ground terminal of comparator U1A is grounded, and the power supply terminal of comparator U1A is connected between capacitor C4 and the 5V power supply.

[0033] One end of resistor R12 is connected between resistors R4 and R14. The other end of resistor R12 is connected in series with capacitor C3 and filter L2 and then connected to the second terminal of XLR connector J1. One end of resistor R15 is connected between capacitor C1 and filter L1 and the other end of resistor R15 is grounded. One end of resistor R16 is connected between capacitor C3 and filter L2 and the other end of resistor R16 is grounded. The first terminal of XLR connector J1 is connected in series with filter L3 and resistor R18 and then grounded. The fourth terminal of XLR connector J1 is grounded.

[0034] Furthermore, the interface circuit includes an LTC output circuit connected to the LTC OUT interface;

[0035] The LTC output circuit includes: resistors R20, R22, R23, potentiometer R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, capacitors C6, C7, C8, C9, C11, C12, C16, filters L4, L5, L6, amplifiers U3A and U3B, and a XLR connector J2.

[0036] The non-inverting input of amplifier U3A is connected in series with resistor R25 and capacitor C9, and then connected to the second terminal of potentiometer R24. The inverting input of amplifier U3A is connected in series with resistor R22 and then grounded. The output of amplifier U3A is connected in series with resistor R23, capacitor C8, and filter L4, and then connected to the second terminal of XLR connector J2. The non-inverting input of amplifier U3B is connected in series with resistor R31 and then grounded. The inverting input of amplifier U3B is connected in series with resistor R33 and then connected between capacitor C9 and resistor R25. The output of amplifier U3B is connected in series with resistor R32, capacitor C12, and filter L6, and then connected to the third terminal of XLR connector J1.

[0037] The third terminal of potentiometer R24 ​​is connected to the LTC OUT interface. The first terminal of potentiometer R24 ​​is connected in series with resistor R28 and then grounded. One end of resistor R20 is connected between resistor R22 and the inverting input terminal of amplifier U3A, and the other end of resistor R20 is connected between resistor R23 and the output terminal of amplifier U3A. Capacitor C6 is connected in parallel across resistor R20. One end of capacitor C7 is connected to 5V, and the other end is grounded. One end of capacitor C11 is connected to -5V, and the other end is grounded. The two power supply terminals of amplifier U3A are connected between capacitor C7 and 5V and between capacitor C11 and -5V, respectively. One end of resistor R27 is connected between resistor R25 and the non-inverting input terminal of amplifier U3A, and the other end of resistor R27 is connected between resistor R32 and the capacitor. Between C12, one end of resistor R29 is connected between resistor R31 and the non-inverting input terminal of amplifier U3B, and the other end of resistor R29 is connected between resistor R23 and capacitor C8. One end of resistor R34 is connected between resistor R33 and the inverting input terminal of amplifier U3B, and the other end of resistor R34 is connected between resistor R32 and the output terminal of amplifier U3B. Capacitor C16 is connected in parallel across resistor R34. One end of resistor R26 is connected between capacitor C8 and filter L4, and the other end of resistor R26 is grounded. One end of resistor R30 is connected between capacitor C12 and filter L6, and the other end of resistor R30 is grounded. The first terminal of XLR connector J1 is connected in series with filter L5 and then grounded, and the fourth terminal of XLR connector J1 is grounded.

[0038] Furthermore, the interface circuit includes a MIDI input circuit connected to the MIDI IN interface;

[0039] The MIDI input circuit includes: resistor R17, resistor R19, capacitor C5, diode D1, and optocoupler U2;

[0040] The first terminal of the optocoupler U2 is connected in series with the resistor R19 and then connected to the fourth terminal of the MIDI IN interface. The third terminal of the optocoupler U2 is connected to the fifth terminal of the MIDI IN interface. The second terminal of the MIDI IN interface is grounded. The fourth terminal of the optocoupler U2 is grounded. The fifth terminal of the optocoupler U2 is connected in series with the resistor R17 and then connected to a 3.3V voltage. The sixth terminal of the optocoupler U2 is connected to a 3.3V voltage. One end of the capacitor C5 is connected between the resistor R17 and the 3.3V voltage, and the other end of the capacitor C5 is grounded. The positive terminal of the diode D1 is connected between the third terminal of the optocoupler U2 and the fifth terminal of the MIDI IN interface. The negative terminal of the diode D1 is connected between the resistor R19 and the first terminal of the optocoupler U2. The MRX pin of the MCU module is connected between the resistor R17 and the fifth terminal of the optocoupler U2.

[0041] Furthermore, the interface circuit includes a MIDI output circuit connected to the MIDIOUT interface;

[0042] The MIDI output circuit includes: resistors R3, R5, R7, and R9; capacitor C2; transistor Q1; and transistor Q2.

[0043] The base of transistor Q1 is connected in series with resistor R9 and then connected to the MTX pin of the MCU module. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected in series with resistor R3 and then connected to a 5V voltage. The base of transistor Q2 is connected between resistor R3 and the collector of transistor Q1. The collector of transistor Q2 is connected in series with resistor R5 and then connected to the fifth terminal of the MIDIOUT interface. The fourth terminal of the MIDIOUT interface is connected in series with resistor R7 and then connected to a 5V voltage. The second terminal of the MIDIOUT interface is grounded. One end of capacitor C2 is connected between resistor R7 and the 5V voltage, and the other end of capacitor C2 is grounded.

[0044] Furthermore, the interface module also includes an SD / HD video interface, and the interface circuit also includes an SD / HD input circuit connected to the SD / HD video interface;

[0045] The SD / HD input circuit includes: resistor R46, resistor R51, capacitor C30, capacitor C31, capacitor C32, capacitor C33, capacitor C34, transistor Q3, and SD / HD decoding chip U6.

[0046] The C-Vin pin of the SD / HD decoding chip U6 is connected to the SD / HD video interface via a series connection of capacitor C31 and resistor R46. The GND pin of the SD / HD decoding chip U6 is grounded. The VDD interface of the SD / HD decoding chip U6 is connected to ground via a series connection of capacitor C30. The C-set interface of the SD / HD decoding chip U6 is connected to ground via a series connection of capacitor C34. The HD interface of the SD / HD decoding chip U6 is connected to the base of transistor Q3 via a series connection of resistor R51. The collector of transistor Q3 is connected to the junction of resistor R46 and capacitor C31 via a series connection of capacitor C33. The emitter of transistor Q3 is grounded. One end of capacitor C32 is connected between resistor R46 and capacitor C31. A 3.3V voltage is applied between the VDD pin of the SD / HD decoding chip U6 and capacitor C30.

[0047] Compared with the prior art, the present invention has at least the following beneficial effects:

[0048] 1. This utility model has multiple power supply methods. Users can power the device through DC power socket, USB interface, and PoE network circuit.

[0049] 2. This utility model has both MIDI timecode and SMPTE LTC timecode synchronization, and ArtTimecode and RTP-MIDI network timecode, which can transmit LTC timecode more flexibly.

[0050] 3. This utility model also has the function of converting LTC analog audio into I2S digital audio, and the converted I2S audio can be transmitted to a computer through a USB interface, so that the computer can obtain the LTC timecode through the USB interface. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the module connections of the entire utility model;

[0053] Figure 2 This is a circuit topology diagram of the control panel of this utility model;

[0054] Figure 3 This is a topology diagram of the MCU module and its connection circuit of this utility model;

[0055] Figure 4 This is a topology diagram of the network port circuit of this utility model;

[0056] Figure 5 This is a topology diagram of the PeE circuit of this utility model;

[0057] Figure 6 This is a topology diagram of the relevant circuits of the power module of this utility model;

[0058] Figure 7 This is a topology diagram of the LTC-ADC circuit in this utility model;

[0059] Figure 8 This is a topology diagram of the LTC input circuit in this utility model;

[0060] Figure 9 This is a topology diagram of the LTC output circuit in this utility model;

[0061] Figure 10 This is a topology diagram of the MIDI input circuit in this utility model;

[0062] Figure 11 This is a topology diagram of the MIDI output circuit in this utility model;

[0063] Figure 12 This is a topology diagram of the SD / HD input circuit in this utility model. Detailed Implementation

[0064] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0065] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0066] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0067] In existing technologies, timecode synchronization devices only have interfaces for MIDI timecode and SMPTE LTC timecode, and do not address the issues of ArtTimecode and RTP-MIDI timecode, thus limiting the transmission of SMPTE LTC timecode in computer devices.

[0068] To address the aforementioned issues, this utility model proposes a multifunctional timecode synchronization device, comprising an MCU module, a control panel connected to the MCU module, and a power supply module connected to the MCU module, as well as multiple interface modules and an interface circuit connecting the interface modules and the MCU module.

[0069] The interface module includes at least a MIDI IN interface and a MIDI OUT interface for transmitting MIDI timecode, an LTC IN interface and an LTC OUT interface for transmitting SMPTE LTC timecode, and an Ethernet port for transmitting RTPMIDI timecode and ArtTimecode timecode. The MCU module can transmit and synchronize the corresponding timecode information through the interface circuit connected to the MIDI IN interface, MIDI OUT interface, LTC IN interface, LTC OUT interface, and Ethernet port.

[0070] Please see Figure 1 The interface module of this utility model specifically includes an LTC IN port (i.e., the LTC IN interface mentioned above), an LTC OUT port (i.e., the LTC OUT interface mentioned above), a MIDI input port (i.e., the MIDI IN interface mentioned above), a MIDI output port (i.e., the MIDIOUT interface mentioned above), an Ethernet port, an SD / HD video port (i.e., the SD / HD video interface mentioned above), and a USB port (i.e., the USB interface mentioned above). The corresponding circuits connected to it include an LTC input circuit, an LTC output circuit, a MIDI input circuit, a MIDI output circuit, an Ethernet port circuit, an SD / HD input circuit, and a USB circuit.

[0071] As mentioned earlier, ArtTimecode is one of the timecodes used to synchronize stage equipment over a network, while RTP-MIDI timecode is one used to synchronize digital musical instruments and instrument software over a network. In other words, both of these timecodes can be obtained through network synchronization. Based on the Ethernet interface settings described above, this invention can effectively synchronize and obtain RTP MIDI timecode and ArtTimecode timecode from the network. At the same time, it also takes into account the MIDI timecode and SMPTE LTC timecode that this invention already possesses. Thus, it can achieve the functionality of synchronizing MIDI timecode and SMPTE LTC timecode, as well as providing network timecode for ArtTimecode and RTP-MIDI, allowing for more flexible transmission of LTC timecode.

[0072] Please see Figure 2 In this utility model, the control panel consists of two four-digit LED displays, an LED display circuit, a display screen interface, a motherboard interface, an encoder circuit, and a switch button.

[0073] The four-digit LED display is used to display time code information;

[0074] The display interface is used to connect to a display screen and to display the working status of the multi-functional timecode synchronization device;

[0075] The encoder circuit has a button function for configuring the operating parameters of the multi-functional time code synchronization device;

[0076] The motherboard interface is used to connect to the MCU module and to communicate with the MCU module.

[0077] Please see Figure 6 The power module in this utility model includes a DC power supply circuit, a power on / off circuit, a 5V negative voltage circuit, a 3.3V voltage regulator circuit, and a 5V isolation circuit.

[0078] The DC power supply circuit is connected between the DC power socket and the MCU module to convert the externally input 12V voltage to 5V voltage.

[0079] The power on / off circuit is connected to the power switch button on the control panel to perform the power on / off action;

[0080] The 5V negative voltage circuit is used to power the LTC output circuit;

[0081] The 3.3V voltage regulator circuit is used to regulate the 5V voltage to 3.3V.

[0082] A 5V isolation circuit is used to isolate digital power supplies from analog power supplies.

[0083] Furthermore, the interface circuit in this invention includes a network port circuit connected to the Ethernet port, and the network port circuit is also connected to a PoE circuit for supplying power to the Ethernet port. Please refer to [link to relevant documentation]. Figure 4 The network port circuit of this utility model includes: resistors R53, R54, R55, R56, R67, R68, and R69; capacitors C50, C53, C55, C56, C58, and C59; an Ethernet transformer H1102NL; and a network interface RJ45-LED.

[0084] One end of capacitor C53 is connected to a 3.3V power supply, and the other end is grounded. The first terminal of the Ethernet transformer H1102NL is connected to a 3.3V power supply after series connection with resistor R56. The second terminal of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The third terminal of the Ethernet transformer H1102NL is connected to a 3.3V power supply after series connection with resistor R55. The sixth terminal of the Ethernet transformer H1102NL is connected to a 3.3V power supply after series connection with resistor R54. The seventh terminal of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The eighth terminal of the Ethernet transformer H1102NL is connected to a 3.3V power supply after series connection with resistor R53. The ninth terminal of the Ethernet transformer H1102NL is connected to the RX pin of the RJ45-LED network interface. The Ethernet transformer... The tenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the RXCM terminal. The eleventh terminal of the Ethernet transformer H1102NL is connected to the RX+ pin of the RJ45-LED network interface. The fourteenth terminal of the Ethernet transformer H1102NL is connected to the TX- pin of the RJ45-LED network interface. The fifteenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the TXCM terminal. The sixteenth terminal of the Ethernet transformer H1102NL is connected to the TX+ pin of the RJ45-LED network interface. One end of capacitor C55 is connected between the tenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of capacitor C55 is grounded. One end of capacitor C56 is connected between the fifteenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of capacitor C56 is grounded.

[0085] The GND pin of the RJ45-LED network interface is grounded after being connected in series with resistor R69. The YLED+ and GLED+ pins of the RJ45-LED network interface are connected to a 3.3V power supply. The YLED- pin of the RJ45-LED network interface is connected to the ELED pin of the MCU module after being connected in series with resistor R68. The GLED- pin of the RJ45-LED network interface is connected to the ELINK pin of the MCU module after being connected in series with resistor R67. The multiple NC pins of the RJ45-LED network interface are connected to the PoE circuit as RJ45 and RJ78 terminals, respectively.

[0086] Please see Figure 5 The PoE circuit in this utility model includes: resistors R53, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R79, and R81; capacitors C42, C43, C44, C45, C46, ​​C47, C48, C49, C51, C52, C54, and C57; diodes D7, D8, and D9; Zener diode ZD1; inductor L7; transformer T2; rectifier bridge B1; rectifier bridge B2; and DC / DC controller U7.

[0087] The TXCM and RXCM terminals are connected to the first and third terminals of rectifier bridge B1, respectively. The RJ78 and RJ45 terminals are connected to the first and third terminals of rectifier bridge B2, respectively. The fourth terminals of rectifier bridge B1 and rectifier bridge B2 are connected in series with inductor L7 and connected to the second terminal of transformer T2. The second terminal of rectifier bridge B1 is connected to the positive terminal of Zener diode ZD1. The negative terminal of Zener diode ZD1 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. The second terminal of rectifier bridge B1 is connected between the first terminal of rectifier bridge B1 and the positive terminal of Zener diode ZD1.

[0088] The DET pin of DC / DC controller U7 is connected in series with resistor R59 and then between the fourth terminal of rectifier bridge B1 and inductor L7. The CLS pin of DC / DC controller U7 is connected in series with resistor R60 and then between the second terminal of rectifier bridge B1. The VSS pin of DC / DC controller U7 is connected between resistor R60 and the second terminal of rectifier bridge B1. The VCC pin of DC / DC controller U7 is connected to the power supply of the PoE circuit. The SW pin of DC / DC controller U7 is connected to the positive terminal of diode D9. The negative terminal of diode D9 is connected to one end of resistor R58 and one end of capacitor C46. The other end of resistor R58 and the other end of capacitor C46 are connected to the other end of capacitor C46. One end is connected between the inductor L7 and the second end of the transformer T2. The VDD pin of the DC / DC controller U7 is connected between the inductor L7 and the second end of the rectifier bridge B1. The NC pin of the DC / DC controller U7 is left unused. The GND pin of the DC / DC controller U7 is grounded. The CS pin of the DC / DC controller U7 is grounded after being connected in series with resistor R61. The FB pin of the DC / DC controller U7 is connected to the positive terminal of diode D8 after being connected in series with resistor R63 and resistor R62. The negative terminal of diode D8 is connected to the power supply of the PoE circuit. The COMP pin of the DC / DC controller U7 is grounded after being connected in series with resistor R66 and capacitor C57.

[0089] One end of capacitor C48 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. The other end of capacitor C48 is connected between the second terminal of rectifier bridge B1 and resistor R60 and then grounded. One end of capacitors C43 and C44 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. The other ends of capacitors C43 and C44 are grounded. One end of resistor R57 is connected to the power supply of the PoE circuit. The other end of resistor R57 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. One end of capacitor C45 is connected between inductor L7 and the second terminal of transformer T2. The other end of capacitor C45 is grounded. Resistor R65 is connected in parallel across resistor R63. One end of resistor R64 and capacitor C54 is connected between the FB pin of DC / DC controller U7 and resistor R63. The other ends of resistor R64 and capacitor C54 are grounded.

[0090] The first terminal of transformer T2 is connected between the positive terminal of diode D9 and the SW pin of DC / DC controller U7. The third terminal of transformer T2 is connected to the positive terminal of diode D7. The negative terminal of diode D7 is connected to the positive terminal of diode D6. The negative terminal of diode D6 outputs a 12V voltage. The fourth terminal of transformer T2 is grounded. One end of resistor R52 is connected between the third terminal of transformer T2 and the positive terminal of diode D7. The other end of resistor R52 is connected in series with capacitor C42 and then connected between the negative terminal of diode D7 and the positive terminal of diode D6. One end of capacitor C49 is connected between the negative terminal of diode D7 and the positive terminal of diode D6. The other end of capacitor C49 is grounded. One end of capacitor C47 is connected between the negative terminal of diode D7 and the positive terminal of diode D6. The other end of capacitor C47 is connected in series with capacitor C52 and then grounded. One end of resistor R79 is connected between the negative terminal of diode D7 and the positive terminal of diode D6. The other end of resistor R79 is connected in series with resistor R81 and then grounded.

[0091] Based on the above design, please refer to Figure 3 , Figure 4 ,and Figure 5 The network function of this utility model mainly consists of a network port circuit and a PoE circuit, and communicates with the MCU module through the network port circuit.

[0092] The network port circuit connects to external network devices via RJ45-LED, isolates and communicates network data via Ethernet transformer H1102NL, and communicates with the MCU module via TXOP pin, TXON pin, RXIP pin, and RXIN pin.

[0093] The PoE circuit draws power from the network port through the RXCM, TXCM, RJ45, and RJ78 terminals of the network port circuit, and converts it into a 12V voltage for use by other circuits.

[0094] Furthermore, such as Figure 3 As shown, this product can also enable communication between the USB and MCU modules via the USB circuit, and can also provide 5V power through the USB interface. The bidirectional diodes D3 and D4 form a USB electrostatic protection circuit.

[0095] Please see Figure 8 In this utility model, the interface circuit includes an LTC input circuit connected to the LTC IN interface;

[0096] The LTC input circuit includes: resistors R1, R2, R4, R6, R8, R10, R11, R12, R13, R14, R15, R16, R18, potentiometer R80, capacitors C1, C3, and C4, filters L1, L2, and L3, XLR connector J1, comparator U1A, and comparator U1B;

[0097] One end of resistor R4 is connected to a 5V voltage, and the other end of resistor R4 is connected in series with resistor R14 and then grounded. One end of resistor R6 is connected to a 5V voltage, and the other end of resistor R6 is connected in series with resistor R13 and then grounded. The non-inverting input of comparator U1A is connected between resistors R4 and R14. The inverting input of comparator U1A is connected in series with resistor R8, capacitor C1, and filter L1 and then connected to the third terminal of XLR connector J1. The output of comparator U1A is connected in series with resistor R10 and then connected to the non-inverting input of comparator U1B. The inverting input of comparator U1B is connected between resistors R6 and R13. The output of comparator U1B is connected in series with... Resistor R11 is connected to the LTCIN interface. One end of resistor R2 is connected between resistor R11 and the output of comparator U1B. The other end of resistor R2 is connected between resistor R10 and the non-inverting input of comparator U1B. The third end of potentiometer R80 is connected in series with resistor R1 and then between resistor R10 and the output of comparator U1A. The second end of potentiometer R80 is connected between resistor R8 and the inverting input of comparator U1A. One end of capacitor C4 is connected to the 5V power supply, and the other end of capacitor C4 is grounded. The ground terminal of comparator U1A is grounded. The power supply terminal of comparator U1A is connected between capacitor C4 and the 5V power supply.

[0098] One end of resistor R12 is connected between resistors R4 and R14. The other end of resistor R12 is connected in series with capacitor C3 and filter L2, and then connected to the second terminal of XLR connector J1. One end of resistor R15 is connected between capacitor C1 and filter L1, and the other end of resistor R15 is grounded. One end of resistor R16 is connected between capacitor C3 and filter L2, and the other end of resistor R16 is grounded. The first terminal of XLR connector J1 is connected in series with filter L3 and resistor R18, and then grounded. The fourth terminal of XLR connector J1 is grounded.

[0099] Please see Figure 9 In this utility model, the interface circuit includes an LTC output circuit connected to the LTC OUT interface;

[0100] The LTC output circuit includes: resistors R20, R22, R23, potentiometers R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, capacitors C6, C7, C8, C9, C11, C12, C16, filters L4, L5, L6, amplifiers U3A and U3B, and XLR connector J2.

[0101] The non-inverting input of amplifier U3A is connected in series with resistor R25 and capacitor C9, and then connected to the second terminal of potentiometer R24. The inverting input of amplifier U3A is connected in series with resistor R22 and then grounded. The output of amplifier U3A is connected in series with resistor R23, capacitor C8, and filter L4, and then connected to the second terminal of XLR connector J2. The non-inverting input of amplifier U3B is connected in series with resistor R31 and then grounded. The inverting input of amplifier U3B is connected in series with resistor R33 and then connected between capacitor C9 and resistor R25. The output of amplifier U3B is connected in series with resistor R32, capacitor C12, and filter L6, and then connected to the third terminal of XLR connector J1.

[0102] The third terminal of potentiometer R24 ​​is connected to the LTC OUT interface. The first terminal of potentiometer R24 ​​is connected to ground after being connected in series with resistor R28. One end of resistor R20 is connected between resistor R22 and the inverting input terminal of amplifier U3A, and the other end of resistor R20 is connected between resistor R23 and the output terminal of amplifier U3A. Capacitor C6 is connected in parallel across resistor R20. One end of capacitor C7 is connected to 5V, and the other end of capacitor C7 is grounded. One end of capacitor C11 is connected to -5V, and the other end of capacitor C11 is grounded. The two power supply terminals of amplifier U3A are connected between capacitor C7 and 5V, and between capacitor C11 and -5V, respectively. One end of resistor R27 is connected between resistor R25 and the non-inverting input terminal of amplifier U3A, and the other end of resistor R27 is connected to resistor R32. Between capacitor C12, one end of resistor R29 is connected between resistor R31 and the non-inverting input of amplifier U3B, and the other end of resistor R29 is connected between resistor R23 and capacitor C8. One end of resistor R34 is connected between resistor R33 and the inverting input of amplifier U3B, and the other end of resistor R34 is connected between resistor R32 and the output of amplifier U3B. Capacitor C16 is connected in parallel across resistor R34. One end of resistor R26 is connected between capacitor C8 and filter L4, and the other end of resistor R26 is grounded. One end of resistor R30 is connected between capacitor C12 and filter L6, and the other end of resistor R30 is grounded. The first terminal of XLR connector J1 is connected in series with filter L5 and then grounded, and the fourth terminal of XLR connector J1 is grounded.

[0103] Please see Figure 8 and Figure 9 In this invention, the LTC input circuit inputs the LTC audio signal through XLR port J1, and after processing by comparators U1A and U1B, it is input to the MCU module. The amplification factor of the audio input can be adjusted by potentiometer R80 to adapt to LTC audio input with different voltage amplitudes.

[0104] The LTC output circuit uses a ±5V power supply to power amplifiers U3A and U3B, which can achieve a higher audio voltage amplitude output and is suitable for applications with more LTC inputs. The LTC audio output amplitude can be adjusted by potentiometer R24.

[0105] For further details, please refer to section 1 and... Figure 7 The present invention also includes an LTC ADC circuit connected to the LTC input circuit. Based on the LTC ADC circuit, the present invention supports the conversion of the analog audio signal input by the LTC into an I2S digital audio signal and inputting it into the MCU module. The MCU module will transmit the I2S digital audio signal to the USB interface. The USB interface can be connected to an external computer device, so that the computer device can receive LTC timecode information through the interface.

[0106] Please see Figure 10 The interface circuit in this utility model includes a MIDI input circuit connected to the MIDI IN interface;

[0107] The MIDI input circuit includes: resistor R17, resistor R19, capacitor C5, diode D1, and optocoupler U2;

[0108] The first terminal of optocoupler U2 is connected to the fourth terminal of the MIDI IN interface via series resistor R19. The third terminal of optocoupler U2 is connected to the fifth terminal of the MIDI IN interface. The second terminal of the MIDI IN interface is grounded. The fourth terminal of optocoupler U2 is grounded. The fifth terminal of optocoupler U2 is connected to a 3.3V voltage via series resistor R17. The sixth terminal of optocoupler U2 is connected to a 3.3V voltage. One end of capacitor C5 is connected between resistor R17 and the 3.3V voltage, and the other end of capacitor C5 is grounded. The positive terminal of diode D1 is connected between the third terminal of optocoupler U2 and the fifth terminal of the MIDI IN interface. The negative terminal of diode D1 is connected between resistor R19 and the first terminal of optocoupler U2. The MRX pin of the MCU module is connected between resistor R17 and the fifth terminal of optocoupler U2.

[0109] Please see Figure 11 The interface circuit in this utility model includes a MIDI output circuit connected to the MIDIOUT interface;

[0110] The MIDI output circuit includes: resistors R3, R5, R7, and R9; capacitor C2; transistor Q1; and transistor Q2.

[0111] The base of transistor Q1 is connected to the MTX pin of the MCU module via a series resistor R9. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to a 5V voltage via a series resistor R3. The base of transistor Q2 is connected between resistor R3 and the collector of transistor Q1. The collector of transistor Q2 is connected to the fifth terminal of the MIDIOUT interface via a series resistor R5. The fourth terminal of the MIDIOUT interface is connected to a 5V voltage via a series resistor R7. The second terminal of the MIDIOUT interface is grounded. One end of capacitor C2 is connected between resistor R7 and the 5V voltage, and the other end of capacitor C2 is grounded.

[0112] The aforementioned MIDI input circuit and MIDI output circuit are collectively referred to as the MIDI isolation circuit. The MIDI input circuit uses a high-speed optocoupler for isolation, and the MIDI output circuit uses two transistors for isolation. Both the MIDI input circuit and the MIDI output circuit communicate with the MCU module.

[0113] Please see Figure 12In this utility model, the interface module also includes an SD / HD video interface, and the interface circuit also includes an SD / HD input circuit connected to the SD / HD video interface;

[0114] The SD / HD input circuit includes: resistor R46, resistor R51, capacitor C30, capacitor C31, capacitor C32, capacitor C33, capacitor C34, transistor Q3, and SD / HD decoding chip U6.

[0115] The C-Vin pin of the SD / HD decoding chip U6 is connected to the SD / HD video interface via a series connection of capacitor C31 and resistor R46. The GND pin of the SD / HD decoding chip U6 is grounded. The VDD interface of the SD / HD decoding chip U6 is connected to the ground via a series connection of capacitor C30. The C-set interface of the SD / HD decoding chip U6 is connected to the ground via a series connection of capacitor C34. The HD interface of the SD / HD decoding chip U6 is connected to the base of transistor Q3 via a series connection of resistor R51. The collector of transistor Q3 is connected to the base of transistor Q3 via a series connection of capacitor C33 and then between resistor R46 and capacitor C31. The emitter of transistor Q3 is grounded. One end of capacitor C32 is connected between resistor R46 and capacitor C31. A 3.3V voltage is applied between the VDD pin of the SD / HD decoding chip U6 and capacitor C30.

[0116] As can be seen, the above SD / HD input circuit mainly consists of an SDI interface and an SD / HD decoding chip ISL59885, which is used to input the decoded information into the MCU module.

[0117] Based on the above settings, this utility model can achieve the beneficial effects described above:

[0118] 1. This utility model has multiple power supply methods. Users can power the device through DC power socket, USB interface, and PoE network circuit.

[0119] 2. This utility model has both MIDI timecode and SMPTE LTC timecode synchronization, and ArtTimecode and RTP-MIDI network timecode, which can transmit LTC timecode more flexibly.

[0120] 3. This utility model also has the function of converting LTC analog audio into I2S digital audio, and the converted I2S audio can be transmitted to a computer through a USB interface, so that the computer can obtain the LTC timecode through the USB interface.

[0121] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional timecode synchronization device, comprising an MCU module, a control panel connected to the MCU module, and a power supply module connected to the MCU module, characterized in that, It also includes multiple interface modules, as well as interface circuitry connecting the interface modules and the MCU module; The interface module includes at least a MIDI IN interface and a MIDI OUT interface for transmitting MIDI timecode, an LTC IN interface and an LTC OUT interface for transmitting SMPTE LTC timecode, and an Ethernet port for transmitting RTP MIDI timecode and ArtTimecode timecode. The MCU module can transmit and synchronize the corresponding timecode information through the interface circuit connected to the MIDI IN interface, MIDI OUT interface, LTC IN interface, LTC OUT interface, and Ethernet port.

2. The multifunctional timecode synchronization device according to claim 1, characterized in that, The control panel consists of two four-digit LED displays, LED display circuitry, a display screen interface, a motherboard interface, an encoder circuit, and power switches. The four-digit LED display is used to display time code information; The display screen interface is used to connect to the display screen and to display the working status of the multi-functional timecode synchronization device. The encoder circuit has a button function for configuring the operating parameters of the multi-functional time code synchronization device; The motherboard interface is used to connect to the MCU module and to communicate with the MCU module.

3. The multifunctional timecode synchronization device according to claim 1, characterized in that, The power module includes a DC power supply circuit, a power on / off circuit, a 5V negative voltage circuit, a 3.3V voltage regulator circuit, and a 5V isolation circuit. The DC power supply circuit is connected between the DC power socket and the MCU module, converting the externally input 12V voltage into 5V voltage. The power on / off circuit is connected to the power switch button on the control panel and is used to perform the power on / off action; The 5V negative voltage circuit is used to power the LTC output circuit; The 3.3V voltage regulator circuit is used to regulate the 5V voltage to 3.3V. The 5V isolation circuit is used to isolate digital power and analog power.

4. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface circuit includes a network port circuit connected to the Ethernet port, and the network port circuit is also connected to a PoE circuit for supplying power to the Ethernet port. The network port circuit includes: resistors R53, R54, R55, R56, R67, R68, and R69; capacitors C50, C53, C55, C56, C58, and C59; an Ethernet transformer H1102NL; and a network interface RJ45-LED. One end of capacitor C53 is connected to a 3.3V power supply, and the other end of capacitor C53 is grounded. The first end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R56. The second end of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The third end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R55. The sixth end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R54. The seventh end of the Ethernet transformer H1102NL is connected between capacitor C53 and the 3.3V power supply. The eighth end of the Ethernet transformer H1102NL is connected to a 3.3V power supply after being connected in series with resistor R53. The ninth end of the Ethernet transformer H1102NL is connected to the RX pin of the RJ45-LED network interface. The Ethernet transformer... The tenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the RXCM terminal. The eleventh terminal of the Ethernet transformer H1102NL is connected to the RX+ pin of the RJ45-LED network interface. The fourteenth terminal of the Ethernet transformer H1102NL is connected to the TX- pin of the RJ45-LED network interface. The fifteenth terminal of the Ethernet transformer H1102NL is connected to the PoE circuit as the TXCM terminal. The sixteenth terminal of the Ethernet transformer H1102NL is connected to the TX+ pin of the RJ45-LED network interface. One end of the capacitor C55 is connected between the tenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of the capacitor C55 is grounded. One end of the capacitor C56 is connected between the fifteenth terminal of the Ethernet transformer H1102NL and the PoE circuit, and the other end of the capacitor C56 is grounded. The GND pin of the RJ45-LED network interface is grounded after being connected in series with resistor R69. The YLED+ and GLED+ pins of the RJ45-LED network interface are connected to a 3.3V power supply. The YLED- pin of the RJ45-LED network interface is connected to the ELED pin of the MCU module after being connected in series with resistor R68. The GLED- pin of the RJ45-LED network interface is connected to the ELINK pin of the MCU module after being connected in series with resistor R67. The multiple NC pins of the RJ45-LED network interface are respectively connected to the PoE circuit as RJ45 terminals and RJ78 terminals.

5. The multifunctional timecode synchronization device according to claim 4, characterized in that, The PoE circuit includes: resistors R53, R57, R58, R59, R60, R61, R62, R63, R64, R65, R66, R79, R81; capacitors C42, C43, C44, C45, C46, ​​C47, C48, C49, C51, C52, C54, C57; diodes D7, D8, and D9; Zener diode ZD1; inductor L7; transformer T2; rectifier bridge B1; rectifier bridge B2; and DC / DC controller U7. The TXCM terminal and the RXCM terminal are respectively connected to the first and third terminals of the rectifier bridge B1. The RJ78 terminal and the RJ45 terminal are respectively connected to the first and third terminals of the rectifier bridge B2. The fourth terminals of the rectifier bridge B1 and the rectifier bridge B2 are connected in series with the inductor L7 and connected to the second terminal of the transformer T2. The second terminal of the rectifier bridge B1 is connected to the positive terminal of the Zener diode ZD1. The negative terminal of the Zener diode ZD1 is connected between the inductor L7 and the fourth terminal of the rectifier bridge B1. The second terminal of the rectifier bridge B1 is connected between the first terminal of the rectifier bridge B1 and the positive terminal of the Zener diode ZD1. The DET pin of the DC / DC controller U7 is connected in series with resistor R59 and then between the fourth terminal of the rectifier bridge B1 and the inductor L7. The CLS pin of the DC / DC controller U7 is connected in series with resistor R60 and then between the second terminal of the rectifier bridge B1. The VSS pin of the DC / DC controller U7 is connected between resistor R60 and the second terminal of the rectifier bridge B1. The VCC pin of the DC / DC controller U7 is connected to the power supply of the PoE circuit. The SW pin of the DC / DC controller U7 is connected to the positive terminal of diode D9. The negative terminal of diode D9 is connected to one end of resistor R58 and one end of capacitor C46. The other end of resistor R58 and capacitor C46 are connected to... The other end of 6 is connected between the inductor L7 and the second end of the transformer T2. The VDD pin of the DC / DC controller U7 is connected between the inductor L7 and the second end of the rectifier bridge B1. The NC pin of the DC / DC controller U7 is unused. The GND pin of the DC / DC controller U7 is grounded. The CS pin of the DC / DC controller U7 is connected to ground after being connected in series with the resistor R61. The FB pin of the DC / DC controller U7 is connected to the positive terminal of the diode D8 after being connected in series with the resistor R63 and the resistor R62. The negative terminal of the diode D8 is connected to the power supply of the PoE circuit. The COMP pin of the DC / DC controller U7 is connected to ground after being connected in series with the resistor R66 and the capacitor C57. One end of capacitor C48 is connected between inductor L7 and the fourth terminal of rectifier bridge B1, and the other end of capacitor C48 is connected between the second terminal of rectifier bridge B1 and resistor R60 and then grounded. One end of capacitors C43 and C44 is connected between inductor L7 and the fourth terminal of rectifier bridge B1, and the other end of capacitors C43 and C44 is grounded. One end of resistor R57 is connected to the power supply of the PoE circuit, and the other end of resistor R57 is connected between inductor L7 and the fourth terminal of rectifier bridge B1. One end of capacitor C45 is connected between inductor L7 and the second terminal of transformer T2, and the other end of capacitor C45 is grounded. Resistor R65 is connected in parallel across resistor R63. One end of resistor R64 and capacitor C54 is connected between the FB pin of DC / DC controller U7 and resistor R63, and the other end of resistor R64 and capacitor C54 is grounded. The first terminal of transformer T2 is connected between the anode of diode D9 and the SW pin of DC / DC controller U7. The third terminal of transformer T2 is connected to the anode of diode D7, and the cathode of diode D7 is connected to the anode of diode D6. The cathode of diode D6 outputs a 12V voltage. The fourth terminal of transformer T2 is grounded. One end of resistor R52 is connected between the third terminal of transformer T2 and the anode of diode D7, and the other end of resistor R52 is connected in series with capacitor C42 and then connected to the diode. Between the negative terminal of diode D7 and the positive terminal of diode D6, one end of capacitor C49 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of capacitor C49 is grounded. One end of capacitor C47 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of capacitor C47 is connected to ground after being connected in series with capacitor C52. One end of resistor R79 is connected between the negative terminal of diode D7 and the positive terminal of diode D6, and the other end of resistor R79 is connected to ground after being connected in series with resistor R81.

6. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface circuit includes an LTC input circuit connected to the LTC IN interface; The LTC input circuit includes: resistors R1, R2, R4, R6, R8, R10, R11, R12, R13, R14, R15, R16, R18, potentiometer R80, capacitors C1, C3, and C4, filters L1, L2, and L3, XLR connector J1, comparator U1A, and comparator U1B; One end of resistor R4 is connected to a 5V voltage, and the other end of resistor R4 is connected in series with resistor R14 and then grounded. One end of resistor R6 is connected to a 5V voltage, and the other end of resistor R6 is connected in series with resistor R13 and then grounded. The non-inverting input of comparator U1A is connected between resistor R4 and resistor R14. The inverting input of comparator U1A is connected in series with resistor R8, capacitor C1, and filter L1 and then connected to the third terminal of XLR connector J1. The output of comparator U1A is connected in series with resistor R10 and then connected to the non-inverting input of comparator U1B. The inverting input of comparator U1B is connected between resistor R6 and resistor R13. The output of comparator U1B is connected in series with resistor R11 and then connected to the LTC. The IN interface has one end of resistor R2 connected between resistor R11 and the output of comparator U1B, and the other end of resistor R2 connected between resistor R10 and the non-inverting input of comparator U1B. The third end of potentiometer R80 is connected in series with resistor R1 and then connected between resistor R10 and the output of comparator U1A. The second end of potentiometer R80 is connected between resistor R8 and the inverting input of comparator U1A. One end of capacitor C4 is connected to a 5V power supply, and the other end of capacitor C4 is grounded. The ground terminal of comparator U1A is grounded, and the power supply terminal of comparator U1A is connected between capacitor C4 and the 5V power supply. One end of resistor R12 is connected between resistors R4 and R14. The other end of resistor R12 is connected in series with capacitor C3 and filter L2 and then connected to the second terminal of XLR connector J1. One end of resistor R15 is connected between capacitor C1 and filter L1 and the other end of resistor R15 is grounded. One end of resistor R16 is connected between capacitor C3 and filter L2 and the other end of resistor R16 is grounded. The first terminal of XLR connector J1 is connected in series with filter L3 and resistor R18 and then grounded. The fourth terminal of XLR connector J1 is grounded.

7. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface circuit includes an LTC output circuit connected to the LTC OUT interface; The LTC output circuit includes: resistors R20, R22, R23, potentiometer R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, capacitors C6, C7, C8, C9, C11, C12, C16, filters L4, L5, L6, amplifiers U3A and U3B, and a XLR connector J2. The non-inverting input of amplifier U3A is connected in series with resistor R25 and capacitor C9, and then connected to the second terminal of potentiometer R24. The inverting input of amplifier U3A is connected in series with resistor R22 and then grounded. The output of amplifier U3A is connected in series with resistor R23, capacitor C8, and filter L4, and then connected to the second terminal of XLR connector J2. The non-inverting input of amplifier U3B is connected in series with resistor R31 and then grounded. The inverting input of amplifier U3B is connected in series with resistor R33 and then connected between capacitor C9 and resistor R25. The output of amplifier U3B is connected in series with resistor R32, capacitor C12, and filter L6, and then connected to the third terminal of XLR connector J1. The third terminal of potentiometer R24 ​​is connected to the LTC OUT interface. The first terminal of potentiometer R24 ​​is connected in series with resistor R28 and then grounded. One end of resistor R20 is connected between resistor R22 and the inverting input terminal of amplifier U3A, and the other end of resistor R20 is connected between resistor R23 and the output terminal of amplifier U3A. Capacitor C6 is connected in parallel across resistor R20. One end of capacitor C7 is connected to 5V, and the other end is grounded. One end of capacitor C11 is connected to -5V, and the other end is grounded. The two power supply terminals of amplifier U3A are connected between capacitor C7 and 5V and between capacitor C11 and -5V, respectively. One end of resistor R27 is connected between resistor R25 and the non-inverting input terminal of amplifier U3A, and the other end of resistor R27 is connected between resistor R32 and the capacitor. Between C12, one end of resistor R29 is connected between resistor R31 and the non-inverting input terminal of amplifier U3B, and the other end of resistor R29 is connected between resistor R23 and capacitor C8. One end of resistor R34 is connected between resistor R33 and the inverting input terminal of amplifier U3B, and the other end of resistor R34 is connected between resistor R32 and the output terminal of amplifier U3B. Capacitor C16 is connected in parallel across resistor R34. One end of resistor R26 is connected between capacitor C8 and filter L4, and the other end of resistor R26 is grounded. One end of resistor R30 is connected between capacitor C12 and filter L6, and the other end of resistor R30 is grounded. The first terminal of XLR connector J1 is connected in series with filter L5 and then grounded, and the fourth terminal of XLR connector J1 is grounded.

8. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface circuit includes a MIDI input circuit connected to the MIDIIN interface; The MIDI input circuit includes: resistor R17, resistor R19, capacitor C5, diode D1, and optocoupler U2; The first terminal of the optocoupler U2 is connected in series with the resistor R19 and then connected to the fourth terminal of the MIDIIN interface. The third terminal of the optocoupler U2 is connected to the fifth terminal of the MIDIIN interface. The second terminal of the MIDIIN interface is grounded. The fourth terminal of the optocoupler U2 is grounded. The fifth terminal of the optocoupler U2 is connected in series with the resistor R17 and then connected to a 3.3V voltage. The sixth terminal of the optocoupler U2 is connected to a 3.3V voltage. One end of the capacitor C5 is connected between the resistor R17 and the 3.3V voltage, and the other end of the capacitor C5 is grounded. The positive terminal of the diode D1 is connected between the third terminal of the optocoupler U2 and the fifth terminal of the MIDIIN interface. The negative terminal of the diode D1 is connected between the resistor R19 and the first terminal of the optocoupler U2. The MRX pin of the MCU module is connected between the resistor R17 and the fifth terminal of the optocoupler U2.

9. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface circuit includes a MIDI output circuit connected to the MIDIOUT interface; The MIDI output circuit includes: resistors R3, R5, R7, and R9; capacitor C2; transistor Q1; and transistor Q2. The base of transistor Q1 is connected in series with resistor R9 and then connected to the MTX pin of the MCU module. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected in series with resistor R3 and then connected to a 5V voltage. The base of transistor Q2 is connected between resistor R3 and the collector of transistor Q1. The collector of transistor Q2 is connected in series with resistor R5 and then connected to the fifth terminal of the MIDIOUT interface. The fourth terminal of the MIDIOUT interface is connected in series with resistor R7 and then connected to a 5V voltage. The second terminal of the MIDIOUT interface is grounded. One end of capacitor C2 is connected between resistor R7 and the 5V voltage, and the other end of capacitor C2 is grounded.

10. The multifunctional timecode synchronization device according to claim 1, characterized in that, The interface module also includes an SD / HD video interface, and the interface circuit also includes an SD / HD input circuit connected to the SD / HD video interface; The SD / HD input circuit includes: resistor R46, resistor R51, capacitor C30, capacitor C31, capacitor C32, capacitor C33, capacitor C34, transistor Q3, and SD / HD decoding chip U6. The C-Vin pin of the SD / HD decoding chip U6 is connected to the SD / HD video interface via a series connection of capacitor C31 and resistor R46. The GND pin of the SD / HD decoding chip U6 is grounded. The VDD interface of the SD / HD decoding chip U6 is connected to ground via a series connection of capacitor C30. The C-set interface of the SD / HD decoding chip U6 is connected to ground via a series connection of capacitor C34. The HD interface of the SD / HD decoding chip U6 is connected to the base of transistor Q3 via a series connection of resistor R51. The collector of transistor Q3 is connected to the base of resistor Q3 via a series connection of capacitor C33 via a series connection of resistor R46 and capacitor C31. The emitter of transistor Q3 is grounded. One end of capacitor C32 is connected between resistor R46 and capacitor C31. A 3.3V voltage is applied between the VDD pin of the SD / HD decoding chip U6 and capacitor C30.

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