MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202638096665 A) filed by Fraunhofer-Gesellschaft Zur Frderung Der Angewandten Forschung E. V. on August 10, 2026, for Coding Using Matrix Based Intra-Prediction And Secondary Transforms.
Inventors include Pfaff, Jonathan; Hinz, Tobias; Helle, Philipp; Merkle, Philipp; Stallenberger, Bjrn; Schfer, Michael; Bross, Benjamin; Winken, Martin; Siekmann, Mischa; Schwarz, Heiko Filed On; Marpe, Detlev; and Wiegand, Thomas.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: CODING USING MATRIX BASED INTRA-PREDICTION AND SECONDARY TRANSFORMS here are disclosed techniques for matrix-based predicting a block of a picture efficiently. An embodiment relates to an apparatus for decoding a predetermined block (18) of a picture using intra-prediction, configured to select (602), based on the data stream, a predetermined intra prediction mode (604) out of a plurality (600) of intra-prediction modes which comprises a first set (508) of intra- prediction modes comprising a DC intra prediction mode (506) and angular prediction modes (500), and a second set (520) of matrix-based intra-prediction modes (510) according to each of which a matrix-vector product (512) between a vector (514) derived from reference samples (17) in a neighbourhood of the predetermined block and a prediction matrix (516) associated with the respective matrix-based intra-prediction mode is used to obtain a prediction vector (518), on the basis of which samples of the predetermined block are predicted. The apparatus is configured to derive a prediction signal (606) for the predetermined block using the predetermined intra-prediction mode and select (608) a subset (610) of one or more secondary transforms out of a set (612) of secondary transforms in a manner dependent on the predetermined intra prediction mode so that the subset (610) is nonempty in case of the predetermined intra prediction mode being contained in the first set (508) of intra-prediction modes and the predetermined intra prediction mode being contained in the second set (520) of matrix-based intra-prediction modes (510). Additionally the apparatus is configured to derive (614), from the data stream, a transformed version (616) of a prediction residual for the predetermined block (18), which is related to a spatial domain version (618) of the prediction residual of the predetermined block via a transform (T) defined by a concatenation of a primary transform (Tp) and a predetermined secondary transform (Ts) out of the subset (610) of secondary transforms applied onto a subset (622) of coefficients (620) of the primary transform, in case of the predetermined intra prediction mode being contained in the first set (508) of intraprediction modes and in case of the predetermined intra-prediction mode being contained in the second set (520) of matrix-based intra-prediction modes (510). The apparatus is configured to reconstruct (624) the predetermined block using the prediction signal and the prediction residual for the predetermined block (18).
Disclaimer: Curated by HT Syndication.
