Rolling caption device (CN)

The utility model relates to a rolling caption device (CN) for video playback devices, which comprises a microprocessor, a character library memory, a display memory, peripherals and interfaces, video overlapping controller and an electronic switch, wherein, the character library memory and the display memory are attached on buses of the microprocessor; the peripherals and the interfaces are connected with input and output ports of the microprocessor; an output port of the display memory is connected with the input of video image signals and video overlapping controller; the output of the video overlapping controller, the video image signals and chroma signal levels are connected with the input of the electronic switch. The utility model has the advantages of cheap price and simple operation, and is capable realize caption rolling playback without special caption machines.