Video and audio isolating and switching device
A switching device, video and audio technology, applied in the direction of TV, color TV, color TV parts, etc., can solve the problems of cumbersome work, inability to ensure physical isolation between signals, inconvenience of unified management, etc., to improve security and prevent transmission Leakage, the effect of preventing signal crosstalk
Pending Publication Date: 2021-10-22
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In many application environments, signal sources are often divided into internal signal sources and unreliable external signal sources. Due to the electrical connection inside the switching chip of the existing KVM equipment and video matrix, the physical isolation between signals cannot be guaranteed, so for safety needs At present, the internal signal source and the unreliable external signal source must establish independent video and audio input and output systems, and the equipment must not be shared. Before using one of the systems, the equipment of the other system must be manually turned off. The work is very cumbersome and not easy to unify. manage
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0036] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the present invention, and the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application. The implementation example of the overall functional structure of the isolation switching device is as follows: figure 1 As shown, the main components include:
[0037] (100) Control equipment, including the A control button and the B control button. When the A control button and the B control button are pressed, different level control signals are sent. The default group A switching control signal is low level, and the B group switching control signal is High level, when the dev...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a video and audio isolating and switching device. Video and audio signals from different networks are subjected to either-or output on the premise of complete physical isolation, and the function of switching and sharing display equipment is achieved. The isolating and switching device mainly comprises a control device, a control interface, an input interface, a switching unit, an input signal processing unit, an optical signal transmission unit, an output signal processing unit, an output interface and a power supply unit. According to the device, a control circuit and a signal circuit are completely physically isolated, no programming element is arranged in the device, an embedded control program is not needed, the safety problems that the program is tampered and the program is behind the door are avoided, and the function of preventing reverse signal transmission is achieved. The safety problem existing in the existing KVM equipment and video matrix is solved. The device is simple in structure and high in reliability, and has wide application prospects in the fields of video monitoring, conference systems and the like with confidentiality and safety requirements.
Description
technical field [0001] The invention relates to a video and audio isolation switching device, and the system mainly relates to technical fields such as automatic control, video and audio signal processing, and optical communication. , Background technique [0002] KVM equipment and video matrix are video switching equipment commonly used in video surveillance systems, server room management, and video conferencing systems. They can share multiple video signal sources with USB interface devices such as display devices, keyboards, and mice. In addition to video signals, some KVM devices and video matrices can also manage and switch multiple audio sources to meet the needs of multiple audio signal sources sharing speakers. Existing KVM equipment and video matrix generally use video and audio signal switching chips. The input video and audio signals are selected and switched inside the chip. The control signal interface includes data interfaces such as RS232 serial port and net...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/268H04N7/22
CPCH04N5/268H04N7/22
Inventor 刘毅
Owner CHINA UNIV OF MINING & TECH (BEIJING)