CN219659780U

CN219659780U - Multipath video switching device

Info

Publication number: CN219659780U
Application number: CN202320432456.XU
Authority: CN
Inventors: 罗永军; 何明修
Original assignee: Kunshan Desaipusi Electronic Technology Co ltd
Current assignee: Kunshan Desaipusi Electronic Technology Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-09-08
Anticipated expiration: 2033-03-09

Abstract

The utility model discloses a multipath video switching device which comprises a plurality of input terminals, one output terminal, a display and a video processing module, wherein the input terminals are connected with video signals from different sources, the video processing module comprises a video switching module, a control module and a key module, the video switching module is respectively connected with the input terminals and the output terminal, the control module is connected with the video switching module, the key module is connected with the control module, and the control module controls the video switching module to select video signals corresponding to the input terminals according to the input signals of the key module and send the video signals to the output terminal for display.

Description

Multipath video switching device

Technical Field

The utility model relates to the field of video switching, in particular to a multipath video switching device.

Background

In recent years, video monitoring systems have been widely used in various aspects of social life such as industry, business, finance, traffic, public security, military, and residential communities, and video switches are playing an increasingly important role as the core of video monitoring systems. The switcher can select one path from the multiple paths of input video signals to display.

Video signals from different sources are displayed on the same output screen, and currently, common switching devices only support the input of four paths of different video signals. However, when the video input device is applied to scenes requiring more paths of video input (five paths and more), a single four-path video input device cannot be satisfied, and only a plurality of four-path video input devices can be used for cascading, so that the connection between a plurality of devices becomes complex, the operation is difficult, and the overall relative cost is high.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides a multi-channel video switching device, realizes synchronous input of multi-channel signals, switches corresponding signals according to requirements for display, and has simple integral connection and low cost.

In order to achieve the above purpose, the present utility model proposes the following technical scheme: the multi-channel video switching device comprises a plurality of input terminals, video signals from different sources, an output terminal, a connection display, a video processing module, a video switching module, a control module and a key module, wherein the video switching module is respectively connected with the plurality of input terminals and the output terminal, the control module is connected with the video switching module, the key module is connected with the control module, and the control module controls the video switching module to select the video signals corresponding to the input terminals according to the input signals of the key module and send the video signals to the output terminal for display;

the video switching module comprises a plurality of video switching chips, the video switching chips are provided with four input ports and one output port, the video switching chips are divided into primary video switching chips and secondary video switching chips, the four input ports of each primary video switching chip are all connected with four input terminals, the output port of each primary chip is connected with the input port of the secondary video switching chip, and the output port of the secondary chip is connected with the output terminal.

Preferably, the key module includes a plurality of keys, and the number of the keys is consistent with the number of the input terminals.

Preferably, the control module is connected with an infrared receiving head for receiving a remote control instruction of an external remote controller.

Compared with the prior art, the multi-path video switching device disclosed by the utility model has the advantages that a plurality of video switching chips are connected in a grading manner, multi-path input is realized, the application requirements of more video input scenes are met, the overall integration level is high, the wiring is simple, and the cost is low.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is an overall schematic of an embodiment of the present utility model;

FIG. 2 is a block schematic of an embodiment of the present utility model;

FIG. 3 is a schematic circuit diagram of a primary video switching chip A according to an embodiment of the present utility model;

FIG. 4 is a schematic circuit diagram of a primary video switching chip B according to an embodiment of the present utility model;

FIG. 5 is a schematic circuit diagram of a secondary video switching chip C according to an embodiment of the present utility model;

FIG. 6 is a schematic circuit diagram of a control module in an embodiment of the utility model;

fig. 7 is a schematic circuit diagram of a key module according to an embodiment of the present utility model.

Description of the embodiments

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

As shown in fig. 1, the multi-channel video switching device disclosed by the utility model comprises a plurality of input terminals, a video processing module and an output terminal, wherein the plurality of input terminals are used for connecting video signals from different sources, the output terminal is connected with a display for displaying the video signals, and the video processing module sends the video signals of the selected input terminals to the output terminal for displaying according to external control, so that the switching of multi-channel video input is realized.

Specifically, the input terminal and the output terminal are HDMI interfaces for transmitting high-definition video signals, the video processing module comprises a video switching module, a control module and a key module, wherein the video switching module is respectively connected with a plurality of input terminals and one output terminal, the control module is connected with the video switching module, and the key module is connected with the control module.

Specifically, the video switching module comprises a plurality of video switching chips, wherein the type of each video switching chip is MS1825, and comprises 4 independent HDMI audio/video input channels and 4 independent HDMI audio/video output channels.

Taking 9-channel input as an example in fig. 2 for details, four input channels of the first-stage video switching chip a are connected with the input terminals 1-4, four input channels of the first-stage video switching chip B are connected with the input terminals 5-8, output channels of the video switching chip a and the video switching chip B are connected with input channels of the second-stage video switching chip C, and as the second-stage video switching chip C has spare input channels, the input terminals 9 can be directly connected, the input channels of the second-stage video switching chip C are connected with the output terminals, 9-channel input is shown in fig. 2, if the number of channels needs more, one first-stage video switching chip can be increased again, so that the number of input channels can be increased again, and when the number of input channels exceeds 16, three-stage video switching chips can be increased for subsequent extension expansion, so that more-channel input can be realized, and for control of a plurality of video switching chips, the control module is respectively connected with each video switching chip, and control among different video switching chips can be realized by inputting different signals.

As shown in fig. 3 to 5, which are schematic circuit diagrams of the primary video switching chip, according to the diagrams, pins 1, 3, 4, 6, 7, 9, 10, 12, 15, 16 of the input terminals J2, J3, J4, J5 are respectively connected with pins corresponding to four input channels of the primary video switching chip a, pins 1, 3, 4, 6, 7, 9, 10, 12, 15, 16 of the input terminals J6, J8, J9 are respectively connected with pins corresponding to four input channels of the primary video switching chip B, and pins 89, 90, 92, 93, 95, 96, 98, 99, 118, 119, 120 of the output channels of the video switching chip a and the video switching chip B are respectively connected with pins corresponding to two input channels of the secondary video switching chip C, and the output channels of the secondary video switching chip C are connected with the output terminal J11.

As shown in fig. 6, the control module is a micro control unit, the pins 58 and 59 of the control module are connected with the pins 75 and 76 of the video switching chips a and B to control the video switching chips a and B, the pins 29 and 30 of the micro control unit are connected with the pins 75 and 76 of the video switching chip C to control the video switching chip C, and the pin 44 of the control module is connected with an infrared receiving head for receiving a remote control instruction of an external remote controller, so as to realize control channel selection of the remote controller.

As shown in fig. 7, the key module is a circuit of a key module, and the key module is composed of a plurality of keys, wherein the number of the keys is consistent with that of the input terminals, each key corresponds to one input channel, and the corresponding input channel is selected through the keys.

The multi-channel video switching device disclosed by the utility model realizes synchronous access of multi-channel video signal sources, and performs switching output according to requirements, so that the external wiring of the whole device is simple, and the cost is low.

While the foregoing has been disclosed in the specification and drawings, it will be apparent to those skilled in the art that various substitutions and modifications may be made without departing from the spirit of the utility model, and it is intended that the scope of the utility model be limited not by the specific embodiments disclosed, but by the appended claims.

Claims

1. A multi-channel video switching apparatus, comprising:

a plurality of input terminals connected to video signals of different sources;

an output terminal connected to the display;

the video processing module comprises a video switching module, a control module and a key module, wherein the video switching module is respectively connected with a plurality of input terminals and an output terminal, the control module is connected with the video switching module, the key module is connected with the control module, and the control module controls the video switching module to select the video signal corresponding to the input terminal according to the input signal of the key module and send the video signal to the output terminal for display;

2. The multi-channel video switching apparatus of claim 1 wherein: the key module comprises a plurality of keys, and the number of the keys is consistent with the number of the input terminals.

3. The multi-channel video switching apparatus of claim 1 wherein: the control module is connected with an infrared receiving head and is used for receiving a remote control instruction of an external remote controller.