US 11,736,731 B2
Encoding and decoding a sequence of pictures
Thomas Richter, Erlangen (DE); Wolfgang Heppner, Erlangen (DE); Joachim Keinert, Erlangen (DE); Siegfried Fößel, Erlangen (DE); Herbert Thoma, Erlangen (DE); Christian Scherl, Erlangen (DE); Christian Minuth, Erlangen (DE); Bilal Ahmed, Erlangen (DE); Nisha Bhaskar, Erlangen (DE); and Heiko Sparenberg, Erlangen (DE)
Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Munich (DE)
Filed on Jan. 14, 2022, as Appl. No. 17/576,064.
Prior Publication US 2023/0232048 A1, Jul. 20, 2023
Int. Cl. H04N 19/64 (2014.01); H04N 19/172 (2014.01); H04N 19/18 (2014.01); H04N 19/105 (2014.01)
CPC H04N 19/647 (2014.11) [H04N 19/105 (2014.11); H04N 19/172 (2014.11); H04N 19/18 (2014.11)] 32 Claims
OG exemplary drawing
 
1. An apparatus for decoding a sequence of pictures from a data stream, wherein the apparatus is configured for
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 approximation of a previous picture of the sequence so as to obtain a transform signal representing the picture, the transform signal comprising a plurality of transform coefficients, and
subjecting the transform signal to a spectral-to-spatial transformation, and
deriving the buffered transform signal approximation from a further transform signal representing the previous picture so that the buffered transform signal approximation comprises approximations of further transform coefficients of the further transform signal.