The invention relates to a method of video processing applied to N encoded video
input signals, for decoding and reducing by a factor N the format of said encoded
video input signals, and for generating a set of decoded video signals in the pixel
domain, each encoded video input signal comprising DCT blocs. The method according
to the invention is characterized in that it comprises a first and second inverse
DCT step, each inverse DCT step being applied simultaneously on a plurality of
DCT blocs of reduced size extracted from said N encoded video input signals. Thus
are generated N output blocs of reduced size defining one of said decoded video
signal of reduced format by a factor N.
This invention can advantageously be used for the composition of mosaic video
signals from a set of encoded signals.
