Patent ID: 6828967
Filing Date: 2004-12-07
Classification: G06T

Abstract:
A method of storing digital data comprising the steps of:(a) providing a media object at a given quality level; (b) providing a reversible function, the reversible function comprising a splitting function capable of iterative application, and an inverse splitting function capable of iterative application; (c) manipulating the media object, using the splitting function of the reversible function, into a first data part, from which a first quality version of the media object can be re-generated, the first data part being stored on a first storage medium which is accessible on-line, and a second data part, the second data part being re-combinable with the first data part using the inverse splitting function of the reversible function to enable a version of the media object to be regenerated which is of higher quality than the quality of the version of the media object which could be re-generated using only the first data part; (d) transferring the second data part to a second storage medium which is near on-line accessible and which is physically separate from the first storage medium; and (e) storing the reversible function on the second storage medium.