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31.发明授权Error concealment method and apparatus for audio signal and decoding method and apparatus for audio signal using the same 有权用于音频信号的错误隐藏方法和装置以及使用其的音频信号的解码方法和装置公开(公告)号：US09373331B2
公开(公告)日：2016-06-21
申请号：US13933247
申请日：2013-07-02
发明人： Eun-mi Oh , Ki-hyun Choo , Ho-sang Sung , Chang-yong Son , Jung-hoe Kim , Kang eun Lee
IPC分类号： G10L19/00 , G10L19/005 , H03M13/00
CPC分类号： G10L19/005 , G10L19/0212 , G10L19/022 , H03M13/00
摘要： An error concealment method and apparatus for an audio signal and a decoding method and apparatus for an audio signal using the error concealment method and apparatus. The error concealment method includes selecting one of an error concealment in a frequency domain and an error concealment in a time domain as an error concealment scheme for a current frame based on a predetermined criteria when an error occurs in the current frame, selecting one of a repetition scheme and an interpolation scheme in the frequency domain as the error concealment scheme for the current frame based on a predetermined criteria when the error concealment in the frequency domain is selected, and concealing the error of the current frame using the selected scheme.
摘要翻译： 一种用于音频信号的错误隐藏方法和装置，以及使用错误隐藏方法和装置的用于音频信号的解码方法和装置。 错误隐藏方法包括：当在当前帧中发生错误时，基于预定标准，选择频域中的错误隐藏和时域中的错误隐藏中的一个作为当前帧的错误隐藏方案，选择 重复方案和在频域中的内插方案作为当前帧的错误隐藏方案，当选择频域中的错误隐藏时，基于预定标准，并且使用所选择的方案来隐藏当前帧的错误。
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32.发明授权公开(公告)号：US08825476B2
公开(公告)日：2014-09-02
申请号：US13858688
申请日：2013-04-08
发明人： Ki-hyun Choo , Lei Miao , Eun-mi Oh
IPC分类号： G10L19/12
CPC分类号： G10L19/06 , G10L19/02 , G10L19/0208 , G10L19/04 , G10L19/07 , G10L19/167 , G10L21/038 , G10L25/12 , G10L25/21 , G10L25/90
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.
摘要翻译： 提供了一种通过使用低频信号对高频信号进行编码和解码的方法和装置。 高频信号可以通过线性预测高频信号提取系数进行编码，并对该系数进行编码，通过使用提取的系数和低频信号产生信号，并通过计算高频信号之间的比率来对高频信号进行编码 高频信号和产生的信号的能量值。 此外，可以通过对通过线性预测高频信号提取的系数和低频信号进行解码来解码高频信号，并且通过使用解码的系数和解码的低频信号来生成信号，并且调整 通过解码所生成的信号与高频信号的能量值之间的比率来产生信号。
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公开(公告)号：US20130110522A1
公开(公告)日：2013-05-02
申请号：US13657151
申请日：2012-10-22
发明人： Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L21/00
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：US20130030820A1
公开(公告)日：2013-01-31
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： G10L19/00
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.
摘要翻译： 一种方法，媒体和系统可扩展地编码/解码音频/语音。 该方法包括将输入信号分成低于预定频率的低频带信号和高于预定频率的高频带信号，将分割的低频带信号可扩展地编码为核心层和一个或多个 扩展层，然后对编码的核心层和编码的扩展层进行解码，通过使用分割的低频带信号和编码的核心层和经编码的扩展层的解码信号产生误差信号，并对误差信号和高 频带信号转换成信噪比（SNR）增强层和带宽扩展层。
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公开(公告)号：US11152015B2
公开(公告)日：2021-10-19
申请号：US16496935
申请日：2017-03-22
发明人： Ho-sang Sung , Jong-hoon Jeong , Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L21/0364 , G10K11/178 , G10L25/18 , G10L25/21
摘要： A voice signal processing method includes acquiring a near-end noise signal and a near-end voice signal by using at least one microphone, acquiring a far-end voice signal according to an incoming call, determining a noise control parameter and a voice signal change parameter based on at least one of information about the near-end voice signal, information about the near-end noise signal, or information about the far-end voice signal, generating an anti-phase signal of the near-end noise signal based on the noise control parameter, changing the far-end voice signal to improve articulation of the far-end voice signal based on information related to at least one of the voice signal change parameter, the near-end noise signal, or the anti-phase signal, and outputting the anti-phase signal and the changed far-end voice signal.
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公开(公告)号：US10909992B2
公开(公告)日：2021-02-02
申请号：US16887021
申请日：2020-05-29
发明人： Ki-hyun Choo
IPC分类号： G10L19/002 , G10L19/18 , G10L19/22 , G10L19/00
摘要： The lossless coding method includes selecting one of a first coding method and a second coding method, based on a range in which a quantization index of energy is represented, and coding the quantization index by using the selected coding method. The lossless decoding method includes determining a coding method of a differential quantization index of energy included in a bitstream and decoding the differential quantization index by using one of a first decoding method and a second decoding method based on a range in which a quantization index of energy is represented, in response to the determined coding method.
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公开(公告)号：US10811022B2
公开(公告)日：2020-10-20
申请号：US16657631
申请日：2019-10-18
发明人： Ki-hyun Choo , Eun-mi Oh , Ho-sang Sung
IPC分类号： G10L19/12 , G10L19/24 , G10L19/038 , G10L21/038 , G10L19/00
摘要： A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The decoding apparatus may include: a mode checking unit to check mode information of each of frames included in a bitstream; a first core decoding unit to perform code excited linear prediction (CELP) decoding on a CELP coded frame, when a core coding mode of a low-frequency signal indicates a CELP coding mode; a first extension decoding unit to generate a decoded signal of a high-frequency band by using at least one of a result of the performing the CELP decoding and an excitation signal of the low-frequency signal; a second core decoding unit to perform audio decoding on an audio coded frame, when the core coding mode indicates an audio coding mode; and a second extension decoding unit to generate a decoded signal of the high-frequency band by performing frequency-domain (FD) extension decoding.
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公开(公告)号：US10699720B2
公开(公告)日：2020-06-30
申请号：US16673237
申请日：2019-11-04
发明人： Ki-hyun Choo
IPC分类号： G10L19/22 , G10L19/002 , G10L19/18 , G10L19/00
摘要： The lossless coding method includes selecting one of a first coding method and a second coding method, based on a range in which a quantization index of energy is represented, and coding the quantization index by using the selected coding method. The lossless decoding method includes determining a coding method of a differential quantization index of energy included in a bitstream and decoding the differential quantization index by using one of a first decoding method and a second decoding method based on a range in which a quantization index of energy is represented, in response to the determined coding method.
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公开(公告)号：US10652397B2
公开(公告)日：2020-05-12
申请号：US16339982
申请日：2016-10-07
发明人： Kyung-hun Jung , Ho-sang Sung , Eun-mi Oh , Jong-hoon Jeong , Ki-hyun Choo , Byeong-hoon Kwak
摘要： Provided are a terminal device and method of performing a call function transmitting ambient audio with high sensitivity.A terminal device performing a call function with at least one external device via a network may include a receiver configured to receive at least one of an audio transmission signal and a video transmission signal to be transmitted to the external device; a processor configured to analyze at least one of the audio transmission signal and the video transmission signal, select one of a speech mode and an audio mode, based on a result of the analysis, and compress the audio transmission signal, based on the selected mode; a communicator configured to transmit the compressed audio transmission signal to the external device, and receive an audio reception signal from the external device; and an output unit configured to output the audio reception signal.
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公开(公告)号：US20200051579A1
公开(公告)日：2020-02-13
申请号：US16657631
申请日：2019-10-18
发明人： Ki-hyun Choo , Eun-mi Oh , Ho-sang Sung
IPC分类号： G10L19/12 , G10L19/24 , G10L19/038 , G10L21/038
摘要： A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The coding apparatus may classify a coding mode of a low-frequency signal of an input signal based on characteristics of the low-frequency signal of an input signal, perform code excited linear prediction coding or audio coding on the LPC excitation signal of the low-frequency signal of an input signal, and perform time-domain (TD) extension coding or frequency-domain (FD) extension coding on a high-frequency signal of an input signal. When the FD extension coding is performed, the coding apparatus may generate a base excitation signal for a high band using an input spectrum, obtain an energy control factor of a sub-band in a frame using the base excitation signal and the input spectrum, generate an energy signal based on the input spectrum and the energy control factor, for the sub-band in the frame, and quantize the energy signal.
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