What is a character overlay?
The English abbreviation of VDM or OSD, also called character generator, is a device that adds character information such as text, graphics, symbols, etc. to video signals. Through the character overlay, the date, title, greeting, logo and other information can be displayed on the video screen in real time.
What is the principle of the character stacker?
The character overlay implements the overlay of characters and videos by processing video signals. It first captures the field synchronization information of the video signal, then generates the character information into a format that matches the video signal, and finally superimposes the character information on the video signal to form a new video signal.
What does the character overlay do?
The character stacker has the following main functions:
01、In the video surveillance system, camera position information, time and date information, alarm information, etc. can be superimposed on the video screen to facilitate management and playback.
02、In the production of TV programs, the program title, subtitles, LOGO, etc. can be superimposed on the video screen to enhance the program effect and brand image.
03、In the teaching demonstration, the teacher's name, course name, key reminders, etc. can be superimposed on the video screen to improve the teaching quality and efficiency.
04、In other fields, various text or graphic information can also be superimposed on the video screen according to the needs, such as temperature and humidity data, weighing data of the weighbridge, supermarket cashier data, etc.
What are the areas of application for character overlays?
Character overlays have a wide range of applications, mainly including the following aspects:
01、Security monitoring: such as bank monitoring, elevator monitoring, traffic monitoring, community monitoring, etc.
02、TV production and broadcasting: such as news programs, variety shows, sports programs, advertising programs, etc.
03、Teaching demonstration: such as distance education, online classroom, experiment demonstration, etc.
04、Data collection: such as temperature and humidity monitoring, weighbridge weighing, supermarket cash register, etc.
What are some practical use cases for character overlays?
Case 1: In the monitoring system of the shopping mall, the character overlay is used to display the location of the monitoring camera, equipment number and other information, so that managers can quickly find the video source.
Case 2: In the live program of the TV station, the character superimposer displays the program name, broadcast time, upcoming programs and other information in real time, so that the audience can understand the program arrangement conveniently.
Case 3: The character superimposer is used in the temperature and humidity monitoring system to superimpose time and date information on the data collected by the temperature and humidity sensor, and display it synchronously with the monitoring video screen, so that abnormal situations can be discovered and processed in time.
The character overlay is a magical electronic device, which allows us to see various useful text or graphic information on the video screen, making our life and work more convenient and efficient. Whether it is security monitoring, TV production and broadcasting, teaching demonstration or data collection, the character overlay can play its unique charm. This article gives you a detailed introduction to the principle, function and application fields, and actual use cases of the character overlay, hoping to inspire and help you. If you are interested in character overlays and want to know more about them, please follow us and we will provide you with more exciting content. Thank you for reading, see you next time!