A method of transferring a deferred vertical synchronous signal and an image signal processor executing the method thereof are disclosed. Once the vertical synchronous signal for a kth frame is inputted from an encoding unit after a capture command is inputted, the method transmits a defer control command for a (k+1)th frame to an image sensor. Then, a return control command is transmitted to the image sensor if encoding of the kth frame is completed. With the present invention, complete encoding of image data becomes possible.