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公开(公告)号：EP4428858A3
公开(公告)日：2024-11-13
申请号：EP24191435.7
申请日：2013-04-12
申请人： NTT DOCOMO, INC.
发明人： KIKUIRI, Kei , YAMAGUCHI, Atsushi
IPC分类号： G10L19/00 , G10L19/02 , G10L19/24 , G10L21/038
摘要： An objective of the present invention is to correct a temporal envelope shape of a decoded signal with a small information volume and to reduce perceptible distortions. An audio decoding device which decodes a coded audio signal and outputs an audio signal comprises: a coded series analysis unit that analyzes a coded series which contains the coded audio signal; an audio decoding unit that receives from the coded series analysis unit the coded series which contains the coded audio signal and decodes same, obtaining an audio signal; a temporal envelope shape establishment unit that receives information from the coded series analysis unit and/or the audio decoding unit, and, on the basis of the information, establishes a temporal envelope shape of the decoded audio signal; and a temporal envelope correction unit that, on the basis of the temporal envelope shape which is established with the temporal envelope shape establishment unit, corrects the temporal envelope shape of the decoded audio signal and outputs same.
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公开(公告)号：EP4428858A2
公开(公告)日：2024-09-11
申请号：EP24191435.7
申请日：2013-04-12
申请人： NTT DOCOMO, INC.
发明人： KIKUIRI, Kei , YAMAGUCHI, Atsushi
IPC分类号： G10L19/24
CPC分类号： G10L21/038 , G10L19/24
摘要： An objective of the present invention is to correct a temporal envelope shape of a decoded signal with a small information volume and to reduce perceptible distortions. An audio decoding device which decodes a coded audio signal and outputs an audio signal comprises: a coded series analysis unit that analyzes a coded series which contains the coded audio signal; an audio decoding unit that receives from the coded series analysis unit the coded series which contains the coded audio signal and decodes same, obtaining an audio signal; a temporal envelope shape establishment unit that receives information from the coded series analysis unit and/or the audio decoding unit, and, on the basis of the information, establishes a temporal envelope shape of the decoded audio signal; and a temporal envelope correction unit that, on the basis of the temporal envelope shape which is established with the temporal envelope shape establishment unit, corrects the temporal envelope shape of the decoded audio signal and outputs same.
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公开(公告)号：EP3824464B1
公开(公告)日：2024-07-17
申请号：EP19837231.0
申请日：2019-07-18
IPC分类号： G10L19/24 , G10L19/20 , G10L19/22 , H04R1/40 , H04S7/00 , G10L21/0208 , G10L21/0216 , H04N21/4728 , H04N21/439 , H04N21/81 , H04N21/431 , G10L19/008 , H04N21/422
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公开(公告)号：EP4339946A3
公开(公告)日：2024-04-24
申请号：EP23208114.1
申请日：2014-04-03
发明人： LIU, Zexin , MIAO, Lei
IPC分类号： G10L19/08 , G10L19/24 , G10L21/038 , G10L19/06
CPC分类号： G10L19/06 , G10L19/08 , G10L21/038
摘要： A method and an apparatus for predicting a high frequency excitation signal are disclosed. The method includes: acquiring, according to a received low frequency bitstream, a set of spectral frequency parameters that are arranged in an order of frequencies, where the spectral frequency parameters include low frequency LSF parameters or low frequency ISF parameters; for the set of spectral frequency parameters, calculating a spectral frequency parameter difference (102) between every two spectral frequency parameters that have a same position interval in some or all of the spectral frequency parameters; acquiring a minimum spectral frequency parameter difference (103) from the calculated spectral frequency parameter differences; determining, according to a frequency bin that corresponds to the minimum spectral frequency parameter difference, a start frequency bin (104) for predicting a high frequency excitation signal from a low frequency; and predicting the high frequency excitation signal (105) from the low frequency according to the start frequency bin. By implementing this embodiment, a high frequency excitation signal can be better predicted, thereby improving performance of the high frequency excitation signal.
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公开(公告)号：EP4354433A2
公开(公告)日：2024-04-17
申请号：EP24160804.1
申请日：2020-05-05
IPC分类号： G10L19/24
CPC分类号： G10L19/22 , H04L1/0014 , H04W24/02 , H04L43/0835 , H04L43/16
摘要： A method of communication includes receiving configuration data at a first device from a configuration server, the configuration data indicating a first packet loss rate threshold associated with a first codec configuration. The method includes determining a packet loss rate at the first device, the packet loss rate associated with one or more first packets received at the first device via a network from a second device. The method includes, based on determining that a decoder of the first device has the first codec configuration and that the packet loss rate satisfies the first packet loss rate threshold, sending, to the second device, a request to change a codec configuration of the second device. The method also includes receiving a second packet at the first device via the network from the second device, the second packet encoded based on a second codec configuration.
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公开(公告)号：EP3523801B1
公开(公告)日：2024-04-10
申请号：EP17844590.4
申请日：2017-11-02
IPC分类号： G10L19/24 , H04S3/00 , G10L19/008 , G10L19/16
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公开(公告)号：EP4231293B1
公开(公告)日：2023-11-15
申请号：EP23180365.1
申请日：2009-12-11
IPC分类号： G10L21/038 , G10L19/24
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公开(公告)号：EP4231295A1
公开(公告)日：2023-08-23
申请号：EP23180369.3
申请日：2009-12-11
IPC分类号： G10L21/038 , G10L19/24
摘要： A bandwidth extension decoder (500), (600) for providing a bandwidth extended audio signal (532) based on an input audio signal (502) and a parameter signal (504), wherein the parameter signal (504) comprises an indication of an offset frequency and an indication of a power density parameter, comprises: a patch generator (510) configured to generate a bandwidth extension high-frequency signal (512) comprising a high-frequency band, wherein the high-frequency band of the bandwidth extension high-frequency signal (512) is generated based on a frequency shift of a frequency band of the input audio signal (502), wherein the frequency shift is based on the offset frequency, and wherein the patch generator (510) is configured to amplify or attenuate the high-frequency band of the bandwidth extension high-frequency signal (512) by a factor equal to the value of the power density parameter or equal to the reciprocal value of the power density parameter, respectively; a combiner (529) configured to combine the bandwidth extension high-frequency signal (512) and the input audio signal (502) to obtain the bandwidth extended audio signal (532); and an output interface (530) configured to provide the bandwidth extended audio signal (532) .
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公开(公告)号：EP3697083B1
公开(公告)日：2023-04-19
申请号：EP20167069.2
申请日：2010-08-13
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公开(公告)号：EP4086898A1
公开(公告)日：2022-11-09
申请号：EP22178627.0
申请日：2013-04-12
申请人： NTT DOCOMO, INC.
发明人： KIKUIRI, Kei , YAMAGUCHI, Atsushi
IPC分类号： G10L19/00 , G10L19/02 , G10L19/24 , G10L21/038
摘要： An objective of the present invention is to correct a temporal envelope shape of a decoded signal with a small information volume and to reduce perceptible distortions. An audio decoding device which decodes a coded audio signal and outputs an audio signal comprises: a coded series analysis unit that analyzes a coded series which contains the coded audio signal; an audio decoding unit that receives from the coded series analysis unit the coded series which contains the coded audio signal and decodes same, obtaining an audio signal; a temporal envelope shape establishment unit that receives information from the coded series analysis unit and/or the audio decoding unit, and, on the basis of the information, establishes a temporal envelope shape of the decoded audio signal; and a temporal envelope correction unit that, on the basis of the temporal envelope shape which is established with the temporal envelope shape establishment unit, corrects the temporal envelope shape of the decoded audio signal and outputs same.
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