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1. 发明申请

US20190019519A1 AUDIO ENCODING DEVICE, METHOD AND PROGRAM, AND AUDIO DECODING DEVICE, METHOD AND PROGRAM 审中-公开
公开(公告)号：US20190019519A1
公开(公告)日：2019-01-17
申请号：US16136978
申请日：2018-09-20
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri
IPC分类号： G10L19/005 , G10L19/025 , G10L25/21
摘要： An audio packet error concealment system includes an encoding unit for encoding an audio signal consisting of a plurality of frames, and an auxiliary information encoding unit for estimating and encoding auxiliary information about a temporal change of power of the audio signal. The auxiliary information is used in packet loss concealment in decoding of the audio signal. The auxiliary information about the temporal change of power may contain a parameter that functionally approximates a plurality of powers of subframes shorter than one frame, or may contain information about a vector obtained by vector quantization of a plurality of powers of subframes shorter than one frame.

2. 发明申请

US20220139411A1 AUDIO SIGNAL PROCESSING DEVICE, AUDIO SIGNAL PROCESSING METHOD, AND AUDIO SIGNAL PROCESSING PROGRAM 有权
公开(公告)号：US20220139411A1
公开(公告)日：2022-05-05
申请号：US17575321
申请日：2022-01-13
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/09 , H04L1/00 , G10L19/005 , G10L19/135 , G10L19/07 , G10L19/00
摘要： An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio.

3. 发明授权

US11270715B2 Audio signal discontinuity processing system 有权
公开(公告)号：US11270715B2
公开(公告)日：2022-03-08
申请号：US16844653
申请日：2020-04-09
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/09 , G10L19/005 , H04L1/00 , G10L19/135 , G10L19/07 , G10L19/00
摘要： An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio by changing, in a state buffer, a distance between elements of Immittance Spectral Pair/Immittance Spectral Frequency (ISF/LSF) parameters of a past frame.

4. 发明授权

US11195538B2 Audio coding device, audio coding method, audio coding program, audio decoding device, audio decoding method, and audio decoding program 有权
公开(公告)号：US11195538B2
公开(公告)日：2021-12-07
申请号：US16717837
申请日：2019-12-17
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/09 , G10L19/125 , G10L19/005
摘要： An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. An audio signal receiving device for decoding an audio code and outputting an audio signal includes: an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter upon detection of audio packet loss, and an audio synthesis unit that synthesizes decoded audio from the audio parameter.

5. 发明申请

US20200234723A1 AUDIO SIGNAL PROCESSING DEVICE, AUDIO SIGNAL PROCESSING METHOD, AND AUDIO SIGNAL PROCESSING PROGRAM 审中-公开
公开(公告)号：US20200234723A1
公开(公告)日：2020-07-23
申请号：US16844653
申请日：2020-04-09
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/09 , G10L19/005 , H04L1/00 , G10L19/135
摘要： An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio.

6. 发明授权

US10152982B2 Audio signal processing device, audio signal processing method, and audio signal processing program 有权
公开(公告)号：US10152982B2
公开(公告)日：2018-12-11
申请号：US15706474
申请日：2017-09-15
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/09 , H04L1/00 , G10L19/005 , G10L19/135 , G10L19/07 , G10L19/00
摘要： An audio signal processing device comprises a discontinuity detector configured to determine an occurrence of a discontinuity from a sudden increase of an amplitude of decoded audio obtained by decoding the first audio packet which is received correctly after an occurrence of a packet loss, and a discontinuity corrector for correcting the discontinuity of the decoded audio.

7. 发明授权

US09564143B2 Audio coding device, audio coding method, audio coding program, audio decoding device, audio decoding method, and audio decoding program 有权
标题翻译：音频编码装置，音频编码方法，音频编码程序，音频解码装置，音频解码方法和音频解码程序
公开(公告)号：US09564143B2
公开(公告)日：2017-02-07
申请号：US14712535
申请日：2015-05-14
申请人： NTT DOCOMO, INC
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/005 , G10L19/125 , G10L19/09
CPC分类号： G10L19/125 , G10L19/005 , G10L19/09
摘要： An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. An audio signal receiving device for decoding an audio code and outputting an audio signal includes: an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter upon detection of audio packet loss, and an audio synthesis unit that synthesizes decoded audio from the audio parameter.
摘要翻译：用于对音频信号进行编码的音频信号传输装置包括对音频信号进行编码的音频编码单元和从预览信号计算和编码侧信息的侧信息编码单元。一种音频信号接收装置，用于解码音频代码并输出音频信号，包括：音频代码缓冲器，其基于音频分组的接收状态来检测分组丢失;音频参数解码单元，当音频分组为正确地接收到当正确接收到音频分组时解码侧信息码的侧信息解码单元，累积通过解码侧信息码获得的侧信息的侧信息累积单元，输出音频参数的音频参数缺失处理单元在检测到音频分组丢失时，以及音频合成单元，其从音频参数合成解码的音频。

8. 发明授权

US11322163B2 Audio encoding device, method and program, and audio decoding device, method and program 有权
公开(公告)号：US11322163B2
公开(公告)日：2022-05-03
申请号：US16937366
申请日：2020-07-23
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri
IPC分类号： G10L19/00 , G10L19/005 , G10L25/21 , G10L19/025
摘要： An audio packet error concealment system includes an encoding unit for encoding an audio signal consisting of a plurality of frames, and an auxiliary information encoding unit for estimating and encoding auxiliary information about a temporal change of power of the audio signal. The auxiliary information is used in packet loss concealment in decoding of the audio signal. The auxiliary information about the temporal change of power may contain a parameter that functionally approximates a plurality of powers of subframes shorter than one frame, or may contain information about a vector obtained by vector quantization of a plurality of powers of subframes shorter than one frame.

9. 发明申请

US20220059108A1 AUDIO CODING DEVICE, AUDIO CODING METHOD, AUDIO CODING PROGRAM, AUDIO DECODING DEVICE, AUDIO DECODING METHOD, AND AUDIO DECODING PROGRAM 有权
公开(公告)号：US20220059108A1
公开(公告)日：2022-02-24
申请号：US17515929
申请日：2021-11-01
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/125 , G10L19/09 , G10L19/005
摘要： An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. An audio signal receiving device for decoding an audio code and outputting an audio signal includes: an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter upon detection of audio packet loss, and an audio synthesis unit that synthesizes decoded audio from the audio parameter.

10. 发明授权

US11211077B2 Audio coding device, audio coding method, audio coding program, audio decoding device, audio decoding method, and audio decoding program 有权
公开(公告)号：US11211077B2
公开(公告)日：2021-12-28
申请号：US16717806
申请日：2019-12-17
申请人： NTT DOCOMO, INC.
发明人： Kimitaka Tsutsumi , Kei Kikuiri , Atsushi Yamaguchi
IPC分类号： G10L19/125 , G10L19/09 , G10L19/005
摘要： An audio signal transmission device for encoding an audio signal includes an audio encoding unit that encodes an audio signal and a side information encoding unit that calculates and encodes side information from a look-ahead signal. An audio signal receiving device for decoding an audio code and outputting an audio signal includes: an audio code buffer that detects packet loss based on a received state of an audio packet, an audio parameter decoding unit that decodes an audio code when an audio packet is correctly received, a side information decoding unit that decodes a side information code when an audio packet is correctly received, a side information accumulation unit that accumulates side information obtained by decoding a side information code, an audio parameter missing processing unit that outputs an audio parameter upon detection of audio packet loss, and an audio synthesis unit that synthesizes decoded audio from the audio parameter.

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