Device for managing snap shot in USB camera and method therefor

A device for managing a snap shot in a USB camera comprising:

• a camera for taking, and digitizing an image into an image data, and providing the image data through an end point exclusive for an image;
• an interface unit that receives the image data through the end point exclusive for an image and processes the image data;
• and
• a USB host that receives processed image data from the interface unit and displays the processed image data on a monitor in the USB host, or forwards the processed image data for a picture communication;
• wherein the interface unit comprises:
• a frame sync pattern generating unit for generating a frame sync pattern for indicating that the processed image data preceding the frame sync pattern is moving picture data, thereby indicating an end of a moving picture frame;
• a snap shot sync pattern generating unit for generating a snap shot sync pattern for indicating that the processed image data preceding the snap shot sync pattern is snap shot image data, thereby indicating an end of a snap shot frame;
• a snap shot determining unit for determining an on/off of a snap shot button on the camera;
• a sync pattern selecting unit for selecting as a sync pattern one of the outputs from the frame sync pattern generating unit and the snap shot sync pattern generating unit according to a signal from the snap shot determining unit;
• and
• a sync pattern inserting unit that inserts the sync pattern from the sync pattern selecting unit between frames of image data through an end point exclusive for an image, wherein the sync pattern indicates that the image data preceding the sync pattern is a moving picture frame or a snap shot frame, the data preceding the sync pattern is image data, and the data following the sync pattern is image data, thereby the sync pattern indicating the end of the moving picture frame or the end of the snap shot frame.