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Decoder, encoder and methods for coding a sequence of portions of media from/into a data stream using an unary code

Tipo: Patente
Titulares:
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V (100%)
Inventores:
Keinert, Joachim
Ritcher, Thomas
Thoma, Herbert
Scherl, Christian
de Frutos López, Manuel
Fössel, Siegfried
Solicitud
US201715643799A
07-07-2017
Concesión
Embodiments of the invention concern coders, e.g. a decoder for decoding a sequence of portions of media from a data stream. The decoder is configured to decode, for a current portion, a signed integer variable from the data stream by use of a unary code comprising a series of codewords of increasing length which are sequentially assigned to possible values of the signed integer variable in a manner so that a first possible value having a first sign and a predetermined absolute value has assigned a first codeword of the unary code of a first length which differs from a second length of a second codeword of the unary code assigned to a second possible value having a second sign and the predetermined absolute value, or being zero with the predetermined absolute value being one, by exactly one. The decoder is further configured to derive a bit plane number predictor for the current portion, to derive a bit plane number indicating coded bit-planes by computing a sum of the bit plane number predictor and the signed integer variable, and to decode the current portion from the data stream by use of the bit plane number.
Materia: Electricidad
CIP: H04N19/103 (2006.01); H04N19/11 (2006.01); H04N19/13 (2006.01); H04N19/159 (2006.01); H04N19/184 (2006.01); H04N19/196 (2006.01)
CPC: H04N19/103 (US); H04N19/11 (US); H04N19/159 (US); H04N19/196 (US); H04N19/13 (EP,US); H04N19/184 (EP,US); H04N19/63 (EP,US)