Composite Video titling Generator
The VTG-01 circuit is primarily designed to overlay user-defined text onto a composite video signal, making it suitable for various applications such as home video titling and security footage annotation. The device operates independently, requiring only an IBM AT compatible keyboard for text input and modifications.
The circuit board dimensions are compact, measuring 120mm x 60mm x 30mm, with the PCB itself being 90mm x 48mm. Power is supplied through a 2.1mm DC socket, accepting a voltage range of 9-15V DC at a current rating of 300mA.
Input and output connections utilize standard 75-ohm RCA connectors, ensuring compatibility with typical video equipment. The device supports both PAL and NTSC formats, thus catering to different regional video standards. With an 8MHz video bandwidth, the VTG-01 can handle a clear and stable video signal, allowing for the display of text with a transparent background.
Text display capabilities include adjustable sizes, with four selectable horizontal and vertical sizes, although only one size can be displayed at a time on the screen. The text can be zoomed in the X and/or Y directions across four levels, providing flexibility in text presentation. The display can accommodate 11 rows of text, with each row capable of holding 27 characters, enabling substantial information to be presented effectively.
For enhanced visibility, the circuit features a selectable black text border to improve text clarity against various backgrounds. The on-screen cursor can be activated for easier text editing, and automatic brightness adjustment is implemented, ensuring the text remains legible by maintaining a consistent brightness level at 75% of the white level.
Overall, the VTG-01 is an efficient and versatile solution for integrating text into video signals, providing a user-friendly interface and a range of customizable features.The VTG-01 is designed to display user defined text over a composite video signal. This is useful in a multitude of different applications such as adding titles to home movies and adding custom text to security videos. Text can be displayed in different sizes almost anywhere on the screen. Text entry and editing is done by way of a standard IBM AT keyboard. Features : Lowest possible cost. Completely standalone, only an IBM AT keyboard, no computer required. Compact size 120mm x 60mm x 30mm (PCB only - 90mm x 48mm). Powered from a single 9-15V DC (300mA) power source (2.1mm DC socket). Connects to a standard IBM AT compatible keyboard (not XT compatible). Clear legible text with transparent background. Selectable black text border for a clearer text image.4 Selectable text sizes horizontal and vertical (only one text size per screen). Text can be zoomed in in the X and/or Y directions to four levels. Adjustable horizontal and vertical text window position. 11 rows x 27 character display. Selectable on-screen row cursor. Automatic text brightness adjustment, set to 75% white level. 75ohm RCA composite video input. 75ohm RCA composite video output (includes a DC offset). Colour or B/W compatible. 8MHz video bandwidth. Can be ordered in PAL or NTSC versions 🔗 External reference
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