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Transform block coding

Título alternativo: Codage par transformation de blocs
Tipo: Patente
Titulares:
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V (100%)
Inventores:
Keinert, Joachim
Richter, Thomas
Thoma, Herbert
Scherl, Christian
de Frutos López, Manuel
Fössel, Siegfried
Heppner, Wolfgang
Wtjurin, Sergej
Solicitud
EP2016074730W
14-10-2016
Concesión
Familia
US10887610B2; US2019222853A1
Transform block coding is performed very efficiently in terms of computational complexity and compression ratio, by coding the magnitude bits of the transform coefficients distributed in a matrix, in which the magnitude bits of the spectral coefficients are arranged column-wise with the spectral coefficients of the transform block ordered along a row direction of the matrix. That is, magnitude bits within a certain column of the matrix belong to a certain spectral coefficient, while magnitude bits within a certain row of the matrix belong to a certain bit plane. In this configuration, the distribution of non-zero magnitude bits may be condensed towards one corner of the matrix, corresponding to, for instance, the least significant bit plane and corresponding to, by using a scan order among the transform coefficients which sorts the transform coefficients generally in a manner from lowest to highest frequency, the lowest frequency. Various low complexity variants are presented.
Materia: Electricidad
CIP: H04N19/13 (2006.01); H04N19/18 (2006.01); H04N19/184 (2006.01); H04N19/64 (2006.01); H04N19/645 (2006.01)
CPC: H04N19/129 (US); H04N19/156 (US); H04N19/176 (US); H04N19/463 (US); H04N19/18 (EP,US); H04N19/184 (EP,US); H04N19/645 (EP,US); H04N19/647 (EP,US)