| 摘要 |
Device and method for managing a snap shot in a USB camera, the device including a camera for taking, and digitizing an image, and providing the image through an end point exclusive for an image, an interface unit for inserting either a frame sync pattern between frames of image data provided through an end point exclusive for an image or a snap shot sync pattern instead of the frame sync pattern in a snap shot mode, and a USB host for displaying an image data provided from the interface unit on a monitor in the USB host or forwarding for a picture communication, the method including the steps of (1) determining turning on/off of a snap shot button on the camera, (2) according to a result of the determination, either inserting a frame sync pattern between frames of image data and providing to the USB host, or inserting a snap shot sync pattern instead of the frame sync pattern and providing to the USB host, and (3) either displaying an image data having the frame sync pattern or the snap shot sync pattern inserted thereto on a monitor or transmitting the image data to other external USB host, whereby improving a USB performance since the end point exclusive for an image can be used for other purposes, and reducing a number of pins and simplifying a system of the driver in view of the position of the host, in a case when the end point exclusive for snap shot is not used for other purpose.
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