公开(公告)号：EP2517200B1

公开(公告)日：2015-04-15

申请号：EP11700401.0

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.

公开(公告)号：EP2524372A1

公开(公告)日：2012-11-21

申请号：EP11700402.8

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.

公开(公告)号：EP2335242B1

公开(公告)日：2020-03-18

申请号：EP09752278.3

申请日：2009-10-06

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  GEIGER, Ralf ,  BORSUM, Arne ,  NAGEL, Frederik ,  ROBILLIARD, Julien ,  SUBBARAMAN, Vignesh ,  LECOMTE, Jérémie

IPC分类号： G10L19/00 ,  G10L19/02

公开(公告)号：EP2524372B1

公开(公告)日：2015-01-14

申请号：EP11700402.8

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.

公开(公告)号：EP2517200A1

公开(公告)日：2012-10-31

申请号：EP11700401.0

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.

公开(公告)号：EP4131258A1

公开(公告)日：2023-02-08

申请号：EP22196723.5

申请日：2011-07-20

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  HILDENBRAND, Matthias ,  WEIß, Oliver ,  TRITTHART, Arthur ,  WARMBOLD, Patrick

IPC分类号： G10L19/00 ,  G10L19/02

摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information comprises an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values, in order to obtain the decoded audio information. The arithmetic decoder is configured to select a mapping rule describing a mapping of a code value representing a spectral value, or a most significant bit-plane of a spectral value, in an encoded form, onto a symbol code representing a spectral value, or a most significant bit-plane of a spectral value, in a decoded form, in dependence on a context state described by a numeric current context value. The arithmetic decoder is configured to determine the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder is configured to evaluate a hash table, entries of which define both significant state values amongst the numeric context values and boundaries of intervals of numeric context values, in order to select the mapping rule, wherein the hash table ari_hash_m is defined as given in Figs. 22(1), 22(2), 22(3) and 22(4). The arithmetic decoder is configured to evaluate the hash table, to determine whether the numeric current context value is identical to a table context value described by an entry of the hash table or to determine an interval described by entries of the hash table within which the numeric current context value lies, and to derive a mapping rule index value describing a selected mapping rule in dependence on a result of the evaluation.

公开(公告)号：EP2491552B1

公开(公告)日：2014-12-31

申请号：EP10768018.3

申请日：2010-10-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  RETTELBACH, Nikolaus ,  MULTRUS, Markus ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian ,  WEISS, Oliver

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0208

摘要： An audio encoder uses similar principles.

公开(公告)号：EP2491554B1

公开(公告)日：2014-03-05

申请号：EP10773017.8

申请日：2010-10-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  SUBBARAMAN, Vignesh ,  RETTELBACH, Nikolaus ,  MULTRUS, Markus ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian ,  WEISS, Oliver

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0208

摘要： An audio encoder uses similar principles.

公开(公告)号：EP2524371B1

公开(公告)日：2016-12-07

申请号：EP11700132.1

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00 ,  G10L19/002 ,  G10L19/02

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.

公开(公告)号：EP2524371A1

公开(公告)日：2012-11-21

申请号：EP11700132.1

申请日：2011-01-11

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  RETTELBACH, Nikolaus ,  SUBBARAMAN, Vignesh ,  WEISS, Oliver ,  GAYER, Marc ,  WARMBOLD, Patrick ,  GRIEBEL, Christian

IPC分类号： G10L19/00

CPC分类号： G10L19/02 ,  G10L19/0017 ,  G10L19/002

摘要： An audio decoder includes an arithmetic decoder for providing a plurality of decoded spectral values on the basis of an arithmetically encoded representation of the spectral values, and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates a hash table, entries of which define both significant state values and boundaries of intervals of numeric context values, in order to select the mapping rule. A mapping rule index value is individually associated to a numeric context value being a significant state value.