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 21:
22. A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, the method for decoding a sequence of pictures from a data stream, wherein the method comprises decoding a picture of the sequence by:
deriving a residual transform signal of the picture from the data stream,
combining the residual transform signal with a buffered transform signal of a previous picture of the sequence so as to obtain a transform signal of the picture, the transform signal representing the picture in spectral components, and
subjecting the transform signal to a spectral-to-spatial transformation,
wherein the buffered transform signal comprises a selection out of spectral components representing the previous picture, and
wherein the method comprises:
decoding the previous picture by:
decoding a further residual transform signal of the previous picture from the data stream,
combining the further residual transform signal with a further buffered transform signal of an even further previous picture of the sequence so as to obtain a further transform signal, the further transform signal representing the previous picture in spectral components,
subjecting the further transform signal to a spectral-to-spatial transformation so as to obtain a spatial representation of the previous picture, and
deriving the buffered transform signal from the further transform signal.