Patent ID: 11949915
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 23:
24. A data stream having encoded thereinto a sequence of pictures, the sequence of pictures being encoded into the data stream by the method for encoding a sequence of pictures into a data stream, wherein the method comprises encoding a picture of the sequence by:
subjecting a spatial representation of the picture to a spatial-to-spectral transformation so as to obtain a transform signal, the transform signal representing the picture in spectral components,
deriving a residual transform signal based on a buffered transform signal of a previous picture of the sequence and the transform signal, and
encoding the residual transform signal of the picture into the data stream,
wherein the buffered transform signal comprises a selection out of spectral components representing the previous picture, and
wherein the method comprises:
encoding the previous picture by:
subjecting a further spatial representation of the previous picture to the spatial-to-spectral transformation so as to obtain a further transform signal, the further transform signal representing the previous picture in spectral components,
deriving a further residual transform signal based on a further buffered transform signal of an even further previous picture of the sequence and the further transform signal, and
encoding the further residual transform signal into the data stream, and
deriving the buffered transform signal from the further residual transform signal.