Patent ID: 8224123

Claim:
A method for transmitting and receiving an image signal by means of a transmitting device for transmitting the image signal and a receiving device for receiving the image signal, the method comprising: an image reduction step of reducing an image included in the image signal and generating an image signal including the reduced image by means of the transmitting device; a transmitting step of transmitting the image signal including the reduced image by means of the transmitting device; a receiving step of receiving the image signal transmitted by the transmitting device by means of the receiving device; and an image resolution increasing step of using an alias component and information on motion that are included in the received image signal to convert the received image signal into an image having high resolution by means of the receiving device, wherein: in the image reduction step, processing for reducing an image and applying low pass filtering using one or more low pass filters having cut-off frequencies is performed on the image signal to cut off one or more high frequency components in the direction of the motion that is included in the image signal; and the cut-off frequency of a low pass filter for the image signal in a direction other than the direction of the motion is lower than the cut-off frequency of a low pass filter for the image signal in the direction of the motion.