US 12,225,238 B2
Encoder, decoder, methods and computer programs for an improved lossless compression
Christian Helmrich, Berlin (DE); Benjamin Bross, Berlin (DE); Tung Hoang Nguyen, Berlin (DE); Heiko Schwarz, Berlin (DE); Detlev Marpe, Berlin (DE); and Thomas Wiegand, Berlin (DE)
Assigned to Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed by Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Munich (DE)
Filed on Feb. 14, 2024, as Appl. No. 18/441,783.
Application 18/441,783 is a continuation of application No. 17/568,486, filed on Jan. 4, 2022, granted, now 11,973,988.
Application 17/568,486 is a continuation of application No. PCT/EP2020/068672, filed on Jul. 2, 2020.
Claims priority of application No. 19184790 (EP), filed on Jul. 5, 2019.
Prior Publication US 2024/0187653 A1, Jun. 6, 2024
Int. Cl. H04N 19/70 (2014.01); H04N 19/117 (2014.01); H04N 19/12 (2014.01); H04N 19/124 (2014.01); H04N 19/13 (2014.01); H04N 19/172 (2014.01); H04N 19/61 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/117 (2014.11); H04N 19/12 (2014.11); H04N 19/124 (2014.11); H04N 19/13 (2014.11); H04N 19/172 (2014.11); H04N 19/61 (2014.11); H04N 19/176 (2014.11)] 16 Claims
OG exemplary drawing
 
1. An encoder for encoding a picture into a data stream, the encoder configured to:
signal a plurality of coding parameters in the data stream which relate to a predetermined portion of the picture and control a prediction residual transform mode and a quantization accuracy with respect to the predetermined portion;
check whether the plurality of coding parameters are indicative of a coding parameter setting corresponding to a lossless prediction residual coding; and
responsive to the plurality of coding parameters being indicative of the coding parameter setting corresponding to the lossless prediction residual coding, setting one or more predetermined coding options relating to one or more tools of the encoder for processing a prediction residual corrected predictive reconstruction with respect to the predetermined portion so that the one or more tools are disabled with respect to the predetermined portion.