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公开(公告)号：US20200381001A1
公开(公告)日：2020-12-03
申请号：US16996671
申请日：2020-08-18
发明人： Stefan DOEHLA , Guillaume FUCHS , Bernhard GRILL , Markus MULTRUS , Grzegorz PIETRZYK , Emmanuel RAVELLI , Markus SCHNELL
摘要： Audio decoder device for decoding a bitstream, the audio decoder device including: a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder includes a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder includes a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame; a memory device including one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of the memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding sampling rate being different from the sampling rate of the decoded audio frame, for one or more of the memories and to store the memory state for synthesizing of the one or more audio parameters for the decoded audio frame for one or more of the memories into the respective memory.
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公开(公告)号：US20170142412A1
公开(公告)日：2017-05-18
申请号：US15417232
申请日：2017-01-27
IPC分类号： H04N19/126 , H04N19/184 , H04N19/70 , H04N19/91 , H04N19/44
CPC分类号： H04N19/126 , G10L19/035 , H04N19/13 , H04N19/184 , H04N19/44 , H04N19/70 , H04N19/91
摘要： Embodiments of the present invention provide an encoder comprising a quantization stage, an entropy encoder, a residual quantization stage and a coded signal former. The quantization stage is configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values. The entropy encoder is configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values. The residual quantization stage is configured to quantize a residual signal caused by the quantization stage, wherein the residual quantization stage is configured to determine at least one quantized residual value in dependence on the dead zone of the quantization stage. The coded signal former is configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value.
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公开(公告)号：US20190313100A1
公开(公告)日：2019-10-10
申请号：US16448511
申请日：2019-06-21
IPC分类号： H04N19/126 , H04N19/91 , H04N19/70 , G10L19/035 , H04N19/184 , H04N19/13 , H04N19/44
摘要： Embodiments of the present invention provide an encoder including a quantization stage, an entropy encoder, a residual quantization stage and a coded signal former. The quantization stage is configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values. The entropy encoder is configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values. The residual quantization stage is configured to quantize a residual signal caused by the quantization stage, wherein the residual quantization stage is configured to determine at least one quantized residual value in dependence on the dead zone of the quantization stage. The coded signal former is configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value.
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公开(公告)号：US20240135943A1
公开(公告)日：2024-04-25
申请号：US18537655
申请日：2023-12-12
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/005 , G10L19/022 , G10L19/03 , G10L19/12 , G10L19/20
CPC分类号： G10L19/26 , G10L19/005 , G10L19/022 , G10L19/03 , G10L19/12 , G10L19/20 , G10L21/0364
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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公开(公告)号：US20220157328A1
公开(公告)日：2022-05-19
申请号：US17592423
申请日：2022-02-03
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/022 , G10L19/20 , G10L19/12
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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公开(公告)号：US20200344476A1
公开(公告)日：2020-10-29
申请号：US16923909
申请日：2020-07-08
IPC分类号： H04N19/126 , G10L19/035 , H04N19/13 , H04N19/184 , H04N19/44 , H04N19/70 , H04N19/91
摘要： Embodiments of the present invention provide an encoder including a quantization stage, an entropy encoder, a residual quantization stage and a coded signal former. The quantization stage is configured to quantize an input signal using a dead zone in order to obtain a plurality of quantized values. The entropy encoder is configured to encode the plurality of quantized values using an entropy encoding scheme in order to obtain a plurality of entropy encoded values. The residual quantization stage is configured to quantize a residual signal caused by the quantization stage, wherein the residual quantization stage is configured to determine at least one quantized residual value in dependence on the dead zone of the quantization stage. The coded signal former is configured to form a coded signal from the plurality of entropy encoded values and the at least one quantized residual value.
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公开(公告)号：US20170133028A1
公开(公告)日：2017-05-11
申请号：US15412920
申请日：2017-01-23
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/12 , G10L19/022 , G10L19/20
CPC分类号： G10L19/26 , G10L19/022 , G10L19/12 , G10L19/20 , G10L21/0364 , G11B27/038
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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公开(公告)号：US20230335147A1
公开(公告)日：2023-10-19
申请号：US18339915
申请日：2023-06-22
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/022 , G10L19/20 , G10L19/12
CPC分类号： G10L19/26 , G10L19/022 , G10L19/20 , G10L19/12 , G10L21/0364
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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公开(公告)号：US20230022258A1
公开(公告)日：2023-01-26
申请号：US17882363
申请日：2022-08-05
发明人： Stefan DOEHLA , Guillaume FUCHS , Bernhard GRILL , Markus MULTRUS , Grzegorz PIETRZYK , Emmanuel RAVELLI , Markus SCHNELL
摘要： Audio decoder device for decoding a bitstream, the audio decoder device including: a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder includes a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder includes a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame; a memory device including one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of the memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding sampling rate being different from the sampling rate of the decoded audio frame, for one or more of the memories and to store the memory state for synthesizing of the one or more audio parameters for the decoded audio frame for one or more of the memories into the respective memory.
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公开(公告)号：US20220148609A1
公开(公告)日：2022-05-12
申请号：US17580578
申请日：2022-01-20
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/022 , G10L19/20 , G10L19/12
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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