Abstract: A method of processing a plurality of digital data files including at least one group of medium data files for constituting a sequence of events or activities of a time interval for secure delivery of the digital data files, the method comprising the steps of: (a) processing a plurality of digital data files so as to generate a file identification value for each digital data file, wherein the file identification value of a digital data file is an one-way arithmetic value characteristic of the data content of the digital data file; (b) processing the file identification values to generate an authentication root value, the authentication root value being an one-way arithmetic value characteristic of the plurality of file identification values; (c) encrypting the root value; and (d) grouping the encrypted authentication root value and a selected plurality of digital data files with a set of authentication information for delivery, wherein the set of authentication information is derived from the file identificat

Abstract: A method and an apparatus for video stabilization is disclosed for detecting and eliminating unwanted camera motion from a sequence of video images. Motion vectors are first generated based on sample points using a block matching technique, from which a number of possible camera motions are estimated. Among the estimated camera motions, unwanted or undesirable camera motions are then detected and parameterized. A frame remapping process is then applied to relocate the pixels in the current frame, which acts in opposition to the dislocation of pixels due to unwanted camera motions in order to achieve video stabilization.