A digital image encoding method using a variable quantization parameter includes: acquiring vibration information about a camera from a sensor; determining a common region and a non-common region between a reference frame of the camera and a current frame of the camera caused by vibration based on determining, on the basis of the vibration information, that effective vibration has occurred; and applying a larger quantization parameter to encoding of the non-common region than the common region, wherein the effective vibration comprises vibration that satisfies a predetermined condition.