this is a matlap program for doing upsampling and down sampling for images and video by using (4:2:2) and (4:2:0)technique this is implemented by (mohamed dahi alkholy)(mohamed_dahi_alkholy@yahoo.com)-this is a matlap program for doing upsampling and down sampling for images and video by using (4:2:2)　and (4:2:0)technique this is implemented by (mohamed dahi alkholy)(mohamed_dahi_alkholy@yahoo.com)