Patent ID: 8644632

Claim:
A method comprising: encoding a digital image into an encoded image that comprises a compressed code-stream for the digital image, the compressed code-stream being such that a higher-resolution compressed bitstream and a lower-resolution compressed bitstream can both be extracted from the compressed code-stream before decompressing the compressed code-stream, and the higher-resolution compressed bitstream can be decoded to produce a higher resolution decoding of the digital image, and the lower-resolution compressed bitstream can be decoded to produce a specific lower resolution decoding of the digital image; downscaling the digital image to produce a downscaled lower resolution image different from the specific lower resolution decoding of the digital image; determining a difference between the downscaled lower resolution image and the specific lower resolution decoding of the digital image; and encoding the difference to allow a reconstruction of the downscaled lower resolution image based on the specific lower resolution decoding of the digital image and the difference.