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公开(公告)号：US11616954B2
公开(公告)日：2023-03-28
申请号：US17030466
申请日：2020-09-24
发明人： Ho-sang Sung , Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L19/032 , H04N19/124 , H04N19/196 , H04N19/40 , G10L19/16 , G10L19/24 , H03M13/05 , H03M13/15 , H03M13/31 , G10L19/035 , G10L19/038 , G10L19/02
摘要： A spectrum coding method includes quantizing spectral data of a current band based on a first quantization scheme, generating a lower bit of the current band using the spectral data and the quantized spectral data, quantizing a sequence of lower bits including the lower bit of the current band based on a second quantization scheme, and generating a bitstream based on a upper bit excluding N bits, where N is 1 or greater, from the quantized spectral data and the quantized sequence of lower bits.
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公开(公告)号：US11355129B2
公开(公告)日：2022-06-07
申请号：US17111893
申请日：2020-12-04
发明人： Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L19/00 , G10L19/032 , G10L21/00 , G10L19/035 , G10L19/02
摘要： A lossless encoding method is provided that includes determining a lossless encoding mode of a quantization coefficient as one of an infinite-range lossless encoding mode and a finite-range lossless encoding mode; encoding the quantization coefficient in the infinite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination; and encoding the quantization coefficient in the finite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination.
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公开(公告)号：US11004458B2
公开(公告)日：2021-05-11
申请号：US16593041
申请日：2019-10-04
摘要： Provided are a method and an apparatus for determining an encoding mode for improving the quality of a reconstructed audio signal. A method of determining an encoding mode includes determining one from among a plurality of encoding modes including a first encoding mode and a second encoding mode as an initial encoding mode in correspondence to characteristics of an audio signal, and if there is an error in the determination of the initial encoding mode, generating a modified encoding mode by modifying the initial encoding mode to a third encoding mode.
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公开(公告)号：US10194151B2
公开(公告)日：2019-01-29
申请号：US15500292
申请日：2015-07-28
发明人： Ho-sang Sung , Ki-hyun Choo , Eun-mi Oh
IPC分类号： H04N19/124 , H04N19/196 , H04N19/40 , G10L19/032 , G10L19/16 , H03M13/05 , H03M13/15 , H03M13/31 , G10L19/24 , G10L19/02
摘要： A spectrum coding method includes quantizing spectral data of a current band based on a first quantization scheme, generating a lower bit of the current band using the spectral data and the quantized spectral data, quantizing a sequence of lower bits including the lower bit of the current band based on a second quantization scheme, and generating a bitstream based on a upper bit excluding N bits, where N is 1 or greater, from the quantized spectral data and the quantized sequence of lower bits.
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公开(公告)号：US10115407B2
公开(公告)日：2018-10-30
申请号：US15333684
申请日：2016-10-25
发明人： Ki-hyun Choo , Lei Miao , Eun-mi Oh
IPC分类号： G10L19/14 , G10L19/06 , G10L19/02 , G10L21/038 , G10L19/04 , G10L19/07 , G10L25/12 , G10L25/90 , G10L19/16 , G10L25/21
摘要： Provided are a method and apparatus for encoding and decoding a high frequency signal by using a low frequency signal. The high frequency signal can be encoded by extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient, generating a signal by using the extracted coefficient and a low frequency signal, and encoding the high frequency signal by calculating a ratio between the high frequency signal and an energy value of the generated signal. Also, the high frequency signal can be decoded by decoding a coefficient, which is extracted by linear predicting a high frequency signal, and a low frequency signal, and generating a signal by using the decoded coefficient and the decoded low frequency signal, and adjusting the generated signal by decoding a ratio between the generated signal and an energy value of the high frequency signal.
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公开(公告)号：US09734837B2
公开(公告)日：2017-08-15
申请号：US13645834
申请日：2012-10-05
发明人： Eun-mi Oh , Ho-sang Sung , Ki-hyun Choo , Kang-eun Lee
IPC分类号： G10L19/24
CPC分类号： G10L19/24
摘要： A method, medium, and system scalably encoding/decoding audio/speech. The method includes splitting an input signal into a low frequency band signal that is lower than a predetermined frequency and a high frequency band signal that is higher than the predetermined frequency, scalably encoding the split low frequency band signal into a core layer and one or more extension layers and then decoding the encoded core layer and the encoded extension layers, generating an error signal by using the split low frequency band signal and a decoded signal of the encoded core layer and the encoded extension layers, and encoding the error signal and the high frequency band signal into a signal-to-noise ratio (SNR) enhancement layer and a bandwidth extension layer.
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公开(公告)号：US08856012B2
公开(公告)日：2014-10-07
申请号：US14170733
申请日：2014-02-03
发明人： Ho-sang Sung , Eun-mi Oh , Jung-hoe Kim , Ki-hyun Choo , Mi-young Kim
IPC分类号： G10L19/00 , G10L19/002 , G10L19/18
CPC分类号： G10L19/002 , G10L19/00 , G10L19/18
摘要： A method of encoding an audio signal, where signals including two or more channel signals are downmixed to a mono signal, the mono signal is divided into a low-frequency signal and a high-frequency signal, the low-frequency signal is encoded through algebraic code excited linear prediction (ACELP) or transform coded excitation (TCX), and the high-frequency signal is encoded using the low-frequency signal. A method of decoding of an audio signal, a low-frequency signal encoded through ACELP or TCX is decoded, a high-frequency signal is decoded using the low-frequency signal, the low-frequency signal and the high-frequency signal are combined to generate a mono signal, and the mono signal is upmixed by decoding spatial parameters regarding signals including two or more channel signals.
摘要翻译： 一种编码音频信号的方法，其中包括两个或更多个信道信号的信号被下混合到单声道信号，单声道信号被分成低频信号和高频信号，低频信号通过代数 代码激励线性预测（ACELP）或变换编码激励（TCX），并且使用低频信号对高频信号进行编码。 解码音频信号的方法，通过ACELP或TCX编码的低频信号进行解码，使用低频信号对低频信号进行解码，将低频信号和高频信号合成为 产生单声道信号，并且单声道信号通过解码关于包括两个或更多个声道信号的信号的空间参数来混合。
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公开(公告)号：US08645126B2
公开(公告)日：2014-02-04
申请号：US13850398
申请日：2013-03-26
发明人： Ho-sang Sung , Eun-mi Oh , Jung-hoe Kim , Ki-hyun Choo , Mi-young Kim
IPC分类号： G10L19/02
CPC分类号： G10L19/002 , G10L19/00 , G10L19/18
摘要： A method of encoding an audio signal, where signals including two or more channel signals are downmixed to a mono signal, the mono signal is divided into a low-frequency signal and a high-frequency signal, the low-frequency signal is encoded through algebraic code excited linear prediction (ACELP) or transform coded excitation (TCX), and the high-frequency signal is encoded using the low-frequency signal. A method of decoding of an audio signal, a low-frequency signal encoded through ACELP or TCX is decoded, a high-frequency signal is decoded using the low-frequency signal, the low-frequency signal and the high-frequency signal are combined to generate a mono signal, and the mono signal is upmixed by decoding spatial parameters regarding signals including two or more channel signals.
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公开(公告)号：US11676614B2
公开(公告)日：2023-06-13
申请号：US17030104
申请日：2020-09-23
发明人： Ki-hyun Choo , Eun-mi Oh , Seon-ho Hwang
IPC分类号： G10L19/12 , G10L21/038 , G10L19/18 , G10L19/012 , G10L19/16 , G10L19/08
CPC分类号： G10L19/12 , G10L19/012 , G10L19/167 , G10L19/18 , G10L21/038 , G10L19/08
摘要： Disclosed are a method and an apparatus for high frequency decoding for bandwidth extension. The method for high frequency decoding for bandwidth extension comprises the steps of: decoding an excitation class; transforming a decoded low frequency spectrum on the basis of the excitation class; and generating a high frequency excitation spectrum on the basis of the transformed low frequency spectrum. The method and apparatus for high frequency decoding for bandwidth extension according to an embodiment can transform a restored low frequency spectrum and generate a high frequency excitation spectrum, thereby improving the restored sound quality without an excessive increase in complexity.
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公开(公告)号：US11259304B2
公开(公告)日：2022-02-22
申请号：US16783637
申请日：2020-02-06
发明人： Kyung-hun Jung , Ho-sang Sung , Eun-mi Oh , Jong-hoon Jeong , Ki-hyun Choo
IPC分类号： H04W72/04 , H04W76/10 , H04W28/20 , H04W68/00 , H04L69/24 , H04W4/80 , H04M1/72412 , H04W88/04 , H04M1/60 , H04W88/18
摘要： Disclosed are a user terminal device and a control method therefor. The control method for a user terminal device comprises the steps of: determining state information of a satellite device connected with a user terminal device when a call request message is received from another terminal device; determining communication configuration information with the another terminal device on the basis of the state information of the satellite device, and transmitting a call response message including the communication configuration information to the another terminal device; and receiving audio data from the another terminal device according to a communication scheme corresponding to the communication configuration information. Therefore, in comparison with the prior art, the present invention can reduce a call negotiation time between user terminal devices, and thus reduce a call cost.
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