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Encoder for encoding, and decoder for decoding, a 2-dimensional digital image representation into a data stream using further encoding of one or more remaining bits below the quantization factor

Título alternativo: Codierer für die codierung und decoder für die decodierung einer 2-dimensionalen digitalbilddarstellung in einen datenstrom unter verwendung von weiterer codierung von einem oder mehreren verbleibenden bits unter dem quantifizierungsfaktor
Título alternativo: Codeur de codage et décodeur de décodage d'une image numérique en 2 dimensions dans un flux de données utilisant un codage supplémentaire d'un ou plusieurs bits restants sous le facteur de quantification
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
E16193869A
14-10-2016
Concesión
Familia
WO2018041379A1; EP3291560A1
An encoder for at least partially encoding a 2-dimensional digital image representation into a compressed data stream is shown. The encoder comprises a rate control unit configured to determine a difference between a bit budget used for differentially encoding groups of coefficients representing spatial components of the digital image representation and a maximum available bit budget to determine a remaining bit budget. Furthermore, a processor may be configured to generate, by encoding, the compressed data stream comprising differentially encoded groups of coefficients representing spatial components of the digital image representation. The processor may encode the compressed data stream above (or greater than) a quantization factor used to compress the groups of coefficients and, further, to encode one or more remaining bit below (or less than) the quantization factor according to the remaining bit budget and to reduce the remaining bit budget respectively.
Materia: Electricidad
CIP: H04N19/124 (2006.01); H04N19/132 (2006.01); H04N19/146 (2006.01); H04N19/18 (2006.01); H04N19/184 (2006.01); H04N19/194 (2006.01); H04N19/463 (2006.01); H04N19/593 (2006.01); H04N19/645 (2006.01)
CPC: H04N19/124 (EP); H04N19/132 (EP); H04N19/146 (EP); H04N19/18 (EP); H04N19/184 (EP); H04N19/194 (EP); H04N19/463 (EP); H04N19/593 (EP); H04N19/645 (EP); H04N19/647 (EP)