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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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公开(公告)号:US10957340B2
公开(公告)日:2021-03-23
申请号:US16492911
申请日:2017-03-10
发明人: Ho-sang Sung , Eun-mi Oh , Holly Francois
摘要: A voice signal processing method according to an embodiment of the present disclosure for overcoming the problem includes: acquiring a real-time near-end noise signal; acquiring a far-end voice signal according to an incoming call; measuring subjective speech quality and perceptual-objective speech quality of test signals generated based on a reference signal and the real-time near-end noise signal; selecting at least one speech quality enhancement method based on the subjective speech quality and the perceptual-objective speech quality, and determining parameters that are to be applied to the selected at least one speech quality enhancement method; and enhancing speech quality of the far-end voice signal by using the selected at least one speech quality enhancement method, based on the determined parameters, wherein the test signals are generated by mixing the acquired real-time near-end noise signal with the reference signal whose speech quality is enhanced by applying a combination of parameter values to speech quality enhancement methods.
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公开(公告)号:US10827175B2
公开(公告)日:2020-11-03
申请号:US16259341
申请日:2019-01-28
发明人: Ho-sang Sung , Ki-hyun Choo , Eun-mi Oh
IPC分类号: G10L19/16 , H04N19/124 , H04N19/196 , H04N19/40 , G10L19/032 , 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:US10803877B2
公开(公告)日:2020-10-13
申请号:US15757547
申请日:2016-09-05
发明人: Ho-sang Sung , Holly Francois , Ki-hyun Choo , Eun-mi Oh , Kyung-hun Jung , Yaodu Wei
IPC分类号: G10L21/00 , G10L19/028 , G10L19/22 , G10L21/0208 , G10L21/02 , G10L19/26 , G10L21/038 , G10L19/00 , H04M3/22
摘要: Provided are a signal processing method and apparatus for enhancing sound quality. The signal processing method performed by a signal transmitting apparatus includes determining, based on a plurality of parameters, a valid bandwidth so as to encode an input signal; performing pre-processing on the input signal, based on the valid bandwidth; and encoding the pre-processed input signal, based on the valid bandwidth, and the signal processing method performed by a signal receiving apparatus includes decoding a bitstream or a packet received via a transmission channel; determining a valid bandwidth, based on a plurality of parameters used in the decoding; and performing post-processing on a decoded signal, based on the valid bandwidth.
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公开(公告)号:US10388293B2
公开(公告)日:2019-08-20
申请号:US15022406
申请日:2014-09-16
发明人: Ho-sang Sung
IPC分类号: G10L19/00 , G10L19/02 , G10L19/035
摘要: A spectrum encoding method includes selecting an important spectral component in band units for a normalized spectrum and encoding information of the selected important spectral component for a band, based on a number, a position, a magnitude and a sign thereof. A spectrum decoding method includes obtaining from a bitstream, information about an important spectral component for a band of an encoded spectrum and decoding the obtained information of the important spectral component, based on a number, a position, a magnitude and a sign of the important spectral component.
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公开(公告)号:US10283125B2
公开(公告)日:2019-05-07
申请号:US15617469
申请日:2017-06-08
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 , G10L19/02 , G10L19/022
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.
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7.
公开(公告)号:US10249308B2
公开(公告)日:2019-04-02
申请号:US16126369
申请日:2018-09-10
发明人: Ho-sang Sung , Eun-mi Oh
摘要: A weighting function determination method includes obtaining a line spectral frequency (LSF) coefficient or an immitance spectral frequency (ISF) coefficient from a linear predictive coding (LPC) coefficient of an input signal and determining a weighting function by combining a first weighting function based on spectral analysis information and a second weighting function based on position information of the LSF coefficient or the ISF coefficient.
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8.
公开(公告)号:US10074375B2
公开(公告)日:2018-09-11
申请号:US15112006
申请日:2015-01-15
发明人: Ho-sang Sung , Eun-mi Oh
CPC分类号: G10L19/032 , G10L19/06 , G10L19/07 , G10L19/12 , G10L25/15 , G10L2019/0016
摘要: A weighting function determination method includes obtaining a line spectral frequency (LSF) coefficient or an immitance spectral frequency (ISF) coefficient from a linear predictive coding (LPC) coefficient of an input signal and determining a weighting function by combining a first weighting function based on spectral analysis information and a second weighting function based on position information of the LSF coefficient or the ISF coefficient.
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9.
公开(公告)号:US20180122386A1
公开(公告)日:2018-05-03
申请号:US15858308
申请日:2017-12-29
发明人: Ho-sang Sung , Ki-hyun CHOO , Jung-hoe KIM , Eun-mi OH , Chang-yong SON , Kang-eun LEE
IPC分类号: G10L19/00 , G10L19/022 , G10L19/005
CPC分类号: G10L19/0017 , G10L19/005 , G10L19/022
摘要: Provided are a frame error concealment method and apparatus and an error concealment scheme construction method and apparatus. The frame error concealment method includes generating a new signal by synthesizing a plurality of previous signals that are similar to a signal of an error frame and reconstructing the signal of the error frame using the generated signal.
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公开(公告)号:US09842595B2
公开(公告)日:2017-12-12
申请号:US15376055
申请日:2016-12-12
发明人: Ho-sang Sung , Nam-suk Lee
IPC分类号: G10L19/00 , G10L19/005 , G10L19/02 , G10L19/22
CPC分类号: G10L19/005 , G10L19/0204 , G10L19/22
摘要: Disclosed are a frame error concealment method and apparatus and an audio decoding method and apparatus. The frame error concealment (FEC) method includes: selecting an FEC mode based on at least one of a state of at least one frame and a phase matching flag, with regard to a time domain signal generated after time-frequency inverse transform processing; and performing corresponding time domain error concealment processing on the current frame based on the selected FEC mode, wherein the current frame is an error frame or the current frame is a normal frame when the previous frame is an error frame.
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