- Down-sample the factors of resolution by 2 for each dimension. For example - ,Reduce the 640 x 480 resolution to 320 x 240 resolution.

- Code the smaller image with another JPEG mode.

- Decode the image and up the sample encoded image.

- Encode the difference between the decoded image and the original image.

- The above process can be repeated for multiple times.

- This process provides high quality images with low resolution display.