Caption Insertion

Every video channel of Picolo U4 H.264 PCI-104 embeds a text caption insertion function.

Up to 5(*) lines of up to 47 characters can be engraved in the image. The same text is inserted on both the formatted and compressed streams.

(*)The number of caption text lines may be limited to 2 according to the driver's specification. For example, 5 lines is applicable with the version 2.0 of the Virtual File System driver.

The character set is the 7-bit ASCII character set. Non-printable characters are displayed as small rectangles. The font is not configurable. The character cell size is 16x26 pixels.

The text can be located at four pre-defined positions, or anywhere in the active area (custom position):

The caption foreground is white. The character background is semi-transparent: the excursion of the video luminance is limited upwards

You can control the caption insertion by using the Caption0, Caption1 element.

Picolo U4 H.264 PCI-104 can achieve 4 caption text updates per second for all inputs.