CN220173303U - Distributed node video splicing circuit and device - Google Patents

Abstract

The utility model relates to the technical field of distributed display, and discloses a distributed node video splicing circuit and a device, wherein the circuit comprises: the optical fiber splicing device comprises a node input circuit comprising a first interface and a second splicing interface unit, a node output circuit comprising a third interface and a fourth splicing interface unit, a selection circuit and an optical fiber interface; the optical fiber interface is connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit, and the selection circuit is connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit; the selection circuit is used for determining conduction information, the node input circuit is used for determining a first working state of the first interface and the second splicing interface unit based on the conduction information, the node output circuit is used for determining a second working state of the third interface and the fourth splicing interface unit based on the conduction information, and the optical fiber interface is used for realizing video splicing of input and output based on the first working state and the second working state. The video splicing method and the video splicing device improve video splicing efficiency.

Description

Distributed node video splicing circuit and device

Technical Field

The utility model relates to the technical field of distributed display, in particular to a distributed node video splicing circuit and device.

Background

With the development of display technology, video stitching technology is used more and more frequently in the display field, which also puts higher demands on the video stitching technology.

The video splicing technology in the prior art realizes splicing display of a plurality of videos through a plurality of splicing devices, has great defects, can solve the problem that video splicing can be realized only after the video splicing technology is connected with the used splicing devices through lines, namely, the video splicing technology can realize video splicing after the video splicing technology is connected with the used splicing devices through lines, and further has low video splicing efficiency.

Disclosure of Invention

The utility model mainly aims to provide a distributed node video splicing circuit and device, and aims to solve the technical problem of how to improve video splicing efficiency.

In order to achieve the above object, the present utility model provides a distributed node video splicing circuit, which includes a node input circuit, a node output circuit, a selection circuit and an optical fiber interface, wherein the node input circuit includes a first interface and a second splicing interface unit, and the node output circuit includes a third interface and a fourth splicing interface unit;

the optical fiber interface is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit, and the selection circuit is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit;

the selection circuit is used for determining conduction information, the node input circuit is used for determining a first working state of the first interface and the second splicing interface unit based on the conduction information, the node output circuit is used for determining a second working state of the third interface and the fourth splicing interface unit based on the conduction information, and the optical fiber interface is used for realizing video splicing of input and output based on the first working state and the second working state.

Optionally, the second splicing interface unit includes a first input interface, a second input interface, a third input interface, and a fourth input interface, where the first input interface, the second input interface, the third input interface, and the fourth input interface are connected to the selection circuit and the optical fiber interface, respectively.

Optionally, the fourth splicing interface unit includes a first output interface, a second output interface, a third output interface and a fourth output interface, where the first output interface, the second output interface, the third output interface and the fourth output interface are connected with the selection circuit and the optical fiber interface respectively.

Optionally, the first interface in the node input circuit includes a DP1.4 interface, the second spliced interface unit in the node input circuit includes a DP1.2 interface, the third interface in the node output circuit includes a DP1.4 interface, and the fourth spliced interface unit in the node output circuit includes a DP1.2 interface.

Optionally, the selection circuit includes output interface, input interface, output selection unit and input selection unit, output selection unit includes output button, output selector and output bus, output interface with output selector's first end is connected, output selector's control end with output button's first end is connected, output button's second end is connected with internal power line, output selector's second end with third interface connection, output selector's third end with output bus connects, output bus with fourth concatenation interface unit connects.

Optionally, the input selecting unit includes an input key, an input selector and an input bus, the input interface is connected with a first end of the input selector, a control end of the input selector is connected with a first end of the input key, a second end of the input key is connected with the internal power line, a second end of the input selector is connected with the first interface, a third end of the input selector is connected with the input bus, and the input bus is connected with the second splicing interface unit.

Optionally, the distributed node video stitching circuit further includes a power circuit, the power circuit includes a power interface and a power line, the power interface is connected with a first end of the power line, and a second end of the power line is connected with the selection circuit as an internal power line.

Optionally, the power supply circuit further includes a voltage reduction chip and a voltage stabilizing chip, an input end of the voltage reduction chip is connected with the power interface, an output end of the voltage reduction chip is connected with an input end of the voltage stabilizing chip, and an output end of the voltage stabilizing chip is connected with a first end of the power line.

In addition, the utility model also provides a distributed node video splicing device, which comprises the distributed node video splicing circuit.

Optionally, the distributed node video stitching device includes an external circuit board, the distributed node video stitching circuit is arranged on the external circuit board, and the node input circuit and the node output circuit in the distributed node video stitching circuit are symmetrically arranged on the external circuit board.

The utility model provides a distributed node video splicing circuit, which comprises a node input circuit, a node output circuit, a selection circuit and an optical fiber interface, wherein the node input circuit comprises a first interface and a second splicing interface unit, and the node output circuit comprises a third interface and a fourth splicing interface unit; the optical fiber interface is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit, and the selection circuit is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit; the selection circuit is used for determining conduction information, the node input circuit is used for determining a first working state of the first interface and the second splicing interface unit based on the conduction information, the node output circuit is used for determining a second working state of the third interface and the fourth splicing interface unit based on the conduction information, and the optical fiber interface is used for realizing video splicing of input and output based on the first working state and the second working state. The first interface unit is connected with the second interface unit through the first interface unit, the second interface unit is connected with the third interface unit through the first interface unit, the third interface unit is connected with the fourth interface unit through the first interface unit, and the fourth interface unit is connected with the first interface unit through the second interface unit. Therefore, the phenomenon that video splicing can be realized only after a plurality of splicing devices are connected with the used splicing devices through lines in the prior art is avoided, normal transmission and video splicing can be realized by the distributed node video splicing circuit in the same circuit, the functionality of the distributed node is improved, and video splicing is realized by the selection circuit in the same circuit, so that video splicing efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a distributed node video stitching circuit according to the present utility model;

FIG. 2 is a schematic diagram of an interface unit in a distributed node video splicing circuit according to the present utility model;

FIG. 3 is a frame connection diagram of a selection circuit in a distributed node video stitching circuit of the present utility model;

FIG. 4 is a frame connection diagram of a power circuit in a distributed node video splice circuit of the present utility model;

FIG. 5 is a schematic diagram of a frame of a distributed node video stitching device according to the present utility model;

fig. 6 is a schematic diagram of a distributed node video splicing device according to the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Selection circuit	20	Node input circuit
30	Node output circuit	40	Optical fiber interface
				21	First interface	22	Second spliced interface unit
31	Third interface	32	Fourth splice interface unit
				2A	First input interface	2B	Second input interface
2C	Third input interface	2D	Fourth input interface
				3A	First output interface	3B	Second output interface
3C	Third output interface	3D	Fourth output interface
				11	Input interface	12	Output interface
13	Input selection unit	14	Output selection unit
				1A	Input key	1B	Input selector
1C	Input bus	1D	Output key
				1E	Output selector	1F	Output ofBus line
50	Internal power cord	60	Power supply circuit
				61	Power interface	62	Blood pressure reducing chip
63	Voltage stabilizing chip	100	Distributed node video splicing device
				110	External circuit board	70	Power line

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For clarity and conciseness in the following description of the embodiments, a brief description of implementation of a distributed node video stitching method is first given:

the common splicing method is to connect a plurality of splicing devices so as to splice a plurality of input videos, on one hand, the common splicing method needs to connect a plurality of devices to splice, and on the other hand, when the common splicing method is switched to normal input, the interface spliced by the devices needs to be connected to the interface of the normal input. For example, when the splicing circuit is converted into a normal circuit, the transmission line of the video data needs to be disconnected from the splicing interface and then connected with the normal interface, so that the whole implementation time is greatly consumed, and a plurality of splicing interfaces and the normal interface are not integrated on one facility at the same time, so that the whole splicing implementation time is greatly prolonged. Especially for the distributed node system, if a plurality of circuits using video splicing are needed, the connection and switching between the distributed node system and the equipment occupy most of the arrangement time of the whole system, so that the efficiency of realizing video splicing of the whole system is not high.

The utility model discloses a distributed node video splicing circuit, which comprises a node input circuit, a node output circuit, a selection circuit and an optical fiber interface, wherein the node input circuit comprises a first interface and a second splicing interface unit, and the node output circuit comprises a third interface and a fourth splicing interface unit; the optical fiber interface is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit, and the selection circuit is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit; the selection circuit is used for determining conduction information, the node input circuit is used for determining a first working state of the first interface and the second splicing interface unit based on the conduction information, the node output circuit is used for determining a second working state of the third interface and the fourth splicing interface unit based on the conduction information, and the optical fiber interface is used for realizing video splicing of input and output based on the first working state and the second working state. The first interface unit is connected with the second interface unit through the first interface unit, the second interface unit is connected with the third interface unit through the first interface unit, the third interface unit is connected with the fourth interface unit through the first interface unit, and the fourth interface unit is connected with the first interface unit through the second interface unit. Therefore, the phenomenon that video splicing can be realized only after a plurality of splicing devices are connected with the used splicing devices through lines in the prior art is avoided, normal transmission and video splicing can be realized by the distributed node video splicing circuit in the same circuit, the functionality of the distributed node is improved, and video splicing is realized by the selection circuit in the same circuit, so that video splicing efficiency is improved.

The utility model provides a distributed node video splicing circuit, referring to the structural schematic diagram of the distributed node video splicing circuit of fig. 1, the distributed node video splicing circuit comprises a node input circuit 20, a node output circuit 30, a selection circuit 10 and an optical fiber interface 40, wherein the node input circuit 20 comprises a first interface 21 and a second splicing interface unit 22, and the node output circuit 30 comprises a third interface 31 and a fourth splicing interface unit 32;

the optical fiber interface 40 is connected to the first interface 21, the second splicing interface unit 22, the third interface 31 and the fourth splicing interface unit 32, and the selection circuit 10 is connected to the first interface 21, the second splicing interface unit 22, the third interface 31 and the fourth splicing interface unit 32;

the selection circuit 10 is configured to determine conduction information, the node input circuit 20 is configured to determine a first operation state of the first interface 21 and the second splicing interface unit 22 based on the conduction information, the node output circuit 30 is configured to determine a second operation state of the third interface 31 and the fourth splicing interface unit 32 based on the conduction information, and the optical fiber interface 40 is configured to implement video splicing of input and output based on the first operation state and the second operation state.

In this embodiment, through the connection manner among the node input circuit 20, the node output circuit 30, the selection circuit 10 and the optical fiber interface 40, the first interface 21 or the second splicing interface unit 22 in the node input circuit 20 can be further turned on through the selection circuit 10, and then data transmission is performed with the optical fiber interface 40, so as to achieve the effect of data input of the first interface 21 or the second splicing interface unit 22; and the third interface 31 or the fourth splicing interface unit 32 in the node output circuit 30 is conducted through the selection circuit 10, so that data transmission is performed with the optical fiber interface 40, and the effect of data output of the third interface 31 or the fourth splicing interface unit 32 is achieved. The on information indicates that the interface in the on node output circuit 30 is connected to an output device or the interface in the on node input circuit 20 is connected to an input device, and the control of the two is corresponding, except that the node output circuit 30 needs to be connected to the output device, for example, a display screen, and the node input circuit 20 needs to be connected to the input device, for example, a host. The first working state refers to a connection state of the first interface 21 or the second splicing interface unit 22 and the input device, and the second working state refers to a connection state of the third interface 31 or the fourth splicing interface unit 32 and the output device, so that input video splicing or integral normal input can be achieved through the first states of the optical fiber interface 40 and the node input circuit 20, or output video splicing or integral normal output can be achieved through the second states of the optical fiber interface 40 and the node output circuit 30. The normal integral interface first interface 21 and the third interface 31, the splicing interface second splicing interface unit 22 and the fourth splicing interface unit 32 are integrated in a circuit, so that the functionality of a distributed node can be improved, and the efficiency of video splicing can be improved without multiple times of pulling and pulling through the conduction information of the selection circuit 10.

Further, in still another embodiment of the distributed node video splicing circuit according to the present utility model, referring to fig. 2, fig. 2 is a schematic frame diagram of an interface unit in the distributed node video splicing circuit, the second splicing interface unit 22 includes a first input interface 2A, a second input interface 2B, a third input interface 2C and a fourth input interface 2D, and the first input interface 2A, the second input interface 2B, the third input interface 2C and the fourth input interface 2D are respectively connected to the selection circuit 10 and the optical fiber interface 40.

Specifically, the fourth splicing interface unit 32 includes a first output interface 3A, a second output interface 3B, a third output interface 3C, and a fourth output interface 3D, where the first output interface 3A, the second output interface 3B, the third output interface 3C, and the fourth output interface 3D are respectively connected to the selection circuit 10 and the optical fiber interface 40.

Specifically, the first interface 21 in the node input circuit 20 includes a DP1.4 interface, the second spliced interface unit 22 in the node input circuit 20 includes a DP1.2 interface, the third interface 31 in the node output circuit 30 includes a DP1.4 interface, and the fourth spliced interface unit 32 in the node output circuit 30 includes a DP1.2 interface.

In this embodiment, the second splice interface unit 22 may include four input interfaces, while the fourth splice interface unit 32 may also include four output interfaces. More or fewer input or output interfaces may be included, and are not limited in this regard. The first interface 21 and the third interface 31 may include DP1.4 interfaces (displayport 1.4 will support signal transmission with 8K resolution), the interfaces in the second and fourth splice interface units 22 and 32 include DP1.2 interfaces (displayport 1.2 will support signal transmission with 4K resolution), and the splice interfaces and the normal input/output interfaces are integrated into one distributed node video splice circuit, so that the functionality of the distributed node video splice circuit may be improved.

In the following description of the overall implementation, when the whole circuit is used as an input terminal, on the one hand, the selection circuit 10 can conduct the line of the first interface 21 in the node input circuit 20, close the line of the second splicing interface unit 22 (the conduction flow is described below), and the interface DP1.4 of the first interface 21 inputs an 8K signal to realize the overall normal input of the signal; on the other hand, the selection circuit 10 may close the line of the first interface 21 in the node input circuit 20 without pulling out the signal line or replacing the device, and turn on the line of the second splicing interface unit 22 (the conduction flow is described below), 4 DP1.2 in the second splicing interface unit 22 inputs 4 video signals (four windows may be arbitrarily roamed and spliced into a complete 8K), or may use more interfaces to implement more input splicing functions.

When the whole circuit is used as an output end, on the one hand, the selection circuit 10 can conduct the line of the third interface 31 in the node output circuit 30, close the line of the fourth splicing interface unit 32 (the conduction flow is described below), and the connection DP1.4 of the third interface 31 outputs 8K (realizes liquid crystal display); on the other hand, the selection circuit 10 may close the line of the third interface 31 in the node output circuit 30 without pulling out the signal line or replacing the device, and turn on the line of the fourth splicing interface unit 32 (the turn-on flow is described below), and 4 DP1.2 in the fourth splicing interface unit 32 outputs 4K video signals to be displayed on the 4K transmitting cards respectively, or may use more interfaces to implement more output splicing functions. Furthermore, by integrating the splicing interface, the normal interface and the selection circuit 10, the splicing and normal switching efficiency of the distributed node video splicing circuit can be improved while the functionality of the distributed node video splicing circuit is improved, and the splicing efficiency is also improved on the side face.

Further, in still another embodiment of the distributed node video splicing circuit according to the present utility model, referring to fig. 3, fig. 3 is a frame connection diagram of a selection circuit in the distributed node video splicing circuit, the selection circuit 10 includes an output interface 12, an input interface 11, an output selection unit 14 and an input selection unit 13, the output selection unit 14 includes an output key 1D, an output selector 1E and an output bus 1F, the output interface 12 is connected to a first end of the output selector 1E, a control end of the output selector 1E is connected to a first end of the output key 1D, a second end of the output key 1D is connected to an internal power line 50, a second end of the output selector 1E is connected to the third interface 31, a third end of the output selector 1E is connected to the output bus 1F, and the output bus 1F is connected to the fourth splicing interface unit 32.

Specifically, the input selecting unit 13 includes an input key 1A, an input selector 1B, and an input bus 1C, the input interface 11 is connected to a first end of the input selector 1B, a control end of the input selector 1B is connected to a first end of the input key 1A, a second end of the input key 1A is connected to the internal power line 50, a second end of the input selector 1B is connected to the first interface 21, a third end of the input selector 1B is connected to the input bus 1C, and the input bus 1C is connected to the second splicing interface unit 22.

In this embodiment, the selection circuit 10 includes two parts, namely an output interface 12, an input interface 11, an output selection unit 14 and an input selection unit 13, so as to realize selection of output and input, wherein the output interface 12 and the input interface 11 are respectively connected with an output device and an input device, and are connected through one interface, so that the use cost of a signal wire can be greatly saved. The requirement for a connected signal line is then a special signal line which can transmit an 8k signal or 4k signals. The operation principle of the output selecting unit 14 and the input selecting unit 13 is the same, and here, the output selecting unit 14 is described as the output selecting unit 14, the output selecting unit 14 includes an output key 1D, an output selector 1E, and an output bus 1F, and the output key 1D is connected to the internal power line 50. When the output key 1D is pressed, the internal power line 50 is connected to the control end of the output selector 1E, and when the control end of the output selector 1E is at a high level, the first end of the output selector 1E and the second end of the output selector 1E are turned on, the first end of the output selector 1E and the third end of the output selector 1E are disconnected, that is, the output interface 12 is connected with the third interface 31 and disconnected with the output bus 1F, and the effect that a single 8k signal is directly output when the distributed node video splicing device is used as the output end is achieved; when the output key 1D is not pressed, the internal power line 50 is not connected to the control end of the output selector 1E, and when the control end of the output selector 1E is at a low level, the first end of the output selector 1E and the second end of the output selector 1E are disconnected, the first end of the output selector 1E and the third end of the output selector 1E, that is, the output interface 12 is disconnected from the third interface 31, and is connected with the output bus 1F, so that the effect that 4k signals are directly output for splicing and outputting when the distributed node video splicing device is used as the output end is achieved. The effect of the output bus 1F is that one signal is divided into four paths of signals connected with four interfaces of the fourth splicing interface unit 32, and the line group requirement corresponding to the output bus 1F can be selected according to the actual interface number. By the selection control of the selection circuit 10, the intelligence of switching can be further improved, and the efficiency of video switching is also improved.

Further, in still another embodiment of the distributed node video mosaic circuit according to the present utility model, referring to fig. 4, fig. 4 is a frame connection diagram of a power supply circuit in the distributed node video mosaic circuit, the distributed node video mosaic circuit further includes a power supply circuit 60, the power supply circuit 60 includes a power supply interface 61 and a power supply line 70, the power supply interface 61 is connected to a first end of the power supply line 70, and a second end of the power supply line 70 is connected to the selection circuit 10 as an internal power supply line 70.

Specifically, the power circuit 60 further includes a voltage reduction chip 62 and a voltage stabilizing chip 63, an input end of the voltage reduction chip 62 is connected to the power interface 61, an output end of the voltage reduction chip 62 is connected to an input end of the voltage stabilizing chip 63, and an output end of the voltage stabilizing chip 63 is connected to a first end of the power line 70.

In this embodiment, the power circuit 60 is further disposed inside the distributed node video splicing circuit, and the power circuit is used for providing stable voltage for the normal operation of the whole node and the internal chip. The power supply is mainly realized by connecting the power interface 61 with the power line 70, the power interface 61 can be a USB interface, a plug interface or an interface input line, the power line 70 at least comprises all internal wiring, and the wiring is input to a connecting chip, a component or an instrument. Because the input voltage is a common ac large voltage, the input voltage needs to be reduced and stabilized, and the input voltage is sequentially connected through the power interface 61, the voltage reducing chip 62 and the voltage stabilizing chip 63, so that the voltage required inside the whole distributed node video splicing circuit can be obtained after the input voltage is processed, the voltage reducing chip 62 and the voltage stabilizing chip 63 can be used chips in a conventional dc power supply, such as voltage stabilizing chips 7812, 7805, 7905 and the like, the voltage reducing chips LM series, ac-dc voltage reducing chips and the like, and specific practical application is selected according to practical requirements, so that the working voltage can be provided for the distributed node video splicing circuit, and the normal operation of the distributed node video splicing circuit is ensured.

In addition, the utility model also provides a distributed node video stitching device 100, and the distributed node video stitching device 100 comprises the distributed node video stitching circuit.

Further, in an embodiment of the distributed node video stitching device of the present utility model, referring to fig. 5, fig. 5 is a schematic diagram of a frame of the distributed node video stitching device, the distributed node video stitching device 100 includes an external circuit board 110, the distributed node video stitching circuit is disposed on the external circuit board 110, and the node input circuit 20 and the node output circuit 30 in the distributed node video stitching circuit are symmetrically disposed on the external circuit board 110.

In this embodiment, the distributed node video splicing apparatus 100 may be an apparatus with an interface, where the node input circuit 20 and the node output circuit 30 may be symmetrically arranged on the external circuit board 110, and the switching efficiency of the whole apparatus may be further improved through the use of the selection circuit 10, so that the video splicing efficiency is also improved laterally. Referring to fig. 6, fig. 6 is a schematic diagram of a distributed node video splicing apparatus, where DC12IN is used as an input interface of 12V DC after being processed by the power circuit 60, a USB interface is used to connect a keyboard, a mouse or other external devices, a USB-PC is used to connect a host computer, OUTPUT represents a third contact DP1.4 IN the node OUTPUT circuit 30, four interfaces DP1.2 IN the fourth splicing interface unit 32, corresponding OUTPUT represents an interface IN the node input circuit 20, AUDIO represents a sound input interface, RELAY1-4, IO1-4 and IR1-4 represent external expansion connectors, and QSFP represents the optical fiber interface 40, the selection circuit 10 and the power circuit 60 are not shown. Through the design of the splicing interface and the normal interface and the design of the selection circuit, the functionality of the distributed node video splicing device 100 can be improved, the intelligence that the video splicing does not need to be pulled out for many times is improved, and the efficiency of video splicing is improved laterally.

In an embodiment, the distributed node video stitching device 100 includes an external circuit board 110 and a circuit board, the external circuit board 110 is provided with a node input circuit 20, a node output circuit 30 and an optical fiber interface 40 in the distributed node video stitching circuit, the node input circuit 20 and the node output circuit 30 are symmetrically arranged on the external circuit board 110, and the circuit board is provided with a selection circuit 10 in the distributed node video stitching circuit.

In an embodiment, the distributed node video stitching device 100 includes an external circuit board 110 and a circuit board, the external circuit board 110 is provided with a node input circuit 20 and a node output circuit 30 in the distributed node video stitching circuit, the node input circuit 20 and the node output circuit 30 are symmetrically arranged on the external circuit board 110, and the circuit board is provided with a selection circuit 10 and an optical fiber interface 40 in the distributed node video stitching circuit.

In an embodiment, the distributed node video splicing device 100 includes a circuit board, the optical fiber interface 40 in the distributed node video splicing circuit is connected to the circuit board through a wire, the node input circuit 20, the node output circuit 30 and the selection circuit 10 in the distributed node video splicing circuit are arranged on the circuit board, and the node input circuit 20 and the node output circuit 30 are symmetrically arranged on the circuit board.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (7)

1. The distributed node video splicing circuit is characterized by comprising a node input circuit, a node output circuit, a selection circuit and an optical fiber interface, wherein the node input circuit comprises a first interface and a second splicing interface unit, and the node output circuit comprises a third interface and a fourth splicing interface unit;

the optical fiber interface is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit, and the selection circuit is respectively connected with the first interface, the second splicing interface unit, the third interface and the fourth splicing interface unit; the first interface in the node input circuit comprises a DP1.4 interface, the second splicing interface unit in the node input circuit comprises a DP1.2 interface, the third interface in the node output circuit comprises a DP1.4 interface, and the fourth splicing interface unit in the node output circuit comprises a DP1.2 interface; the selection circuit comprises an output interface, an input interface, an output selection unit and an input selection unit, wherein the output selection unit comprises an output key, an output selector and an output bus, the output interface is connected with a first end of the output selector, a control end of the output selector is connected with the first end of the output key, a second end of the output key is connected with an internal power line, a second end of the output selector is connected with the third interface, a third end of the output selector is connected with the output bus, and the output bus is connected with the fourth splicing interface unit; the input selection unit comprises an input key, an input selector and an input bus, wherein the input interface is connected with a first end of the input selector, a control end of the input selector is connected with the first end of the input key, a second end of the input key is connected with the internal power line, a second end of the input selector is connected with the first interface, a third end of the input selector is connected with the input bus, and the input bus is connected with the second splicing interface unit; the input interface is connected with the input equipment, and the output interface is connected with the output equipment;

the selection circuit is used for determining conduction information, the node input circuit is used for determining a first working state of the first interface and the second splicing interface unit based on the conduction information, the node output circuit is used for determining a second working state of the third interface and the fourth splicing interface unit based on the conduction information, and the optical fiber interface is used for realizing video splicing of input and output based on the first working state and the second working state.

2. The distributed node video splicing circuit of claim 1 wherein the second splicing interface unit comprises a first input interface, a second input interface, a third input interface, and a fourth input interface, the first input interface, the second input interface, the third input interface, and the fourth input interface being connected to the selection circuit and the fiber optic interface, respectively.

3. The distributed node video splicing circuit of claim 2 wherein the fourth splicing interface unit comprises a first output interface, a second output interface, a third output interface, and a fourth output interface, the first output interface, the second output interface, the third output interface, and the fourth output interface being connected to the selection circuit and the fiber optic interface, respectively.

4. A distributed node video splicing circuit according to any of claims 1-3 wherein the distributed node video splicing circuit further comprises a power circuit comprising a power interface and a power line, the power interface being connected to a first end of the power line, a second end of the power line being connected as an internal power line to the selection circuit.

5. The distributed node video splicing circuit of claim 4 wherein the power circuit further comprises a buck chip and a voltage regulator chip, the buck chip having an input connected to the power interface, an output connected to the voltage regulator chip, and an output connected to the first end of the power line.

6. A distributed node video stitching device, characterized in that it comprises the distributed node video stitching circuit of any one of claims 1 to 5.

7. The distributed node video stitching device according to claim 6, wherein the distributed node video stitching device includes an external circuit board on which the distributed node video stitching circuit is disposed, and wherein node input circuits and node output circuits in the distributed node video stitching circuit are symmetrically disposed on the external circuit board.