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公开(公告)号：US20240055009A1
公开(公告)日：2024-02-15
申请号：US18349680
申请日：2023-07-10
Inventor： Byeongho CHO , Seung Kwon BEACK , Jongmo SUNG , Tae Jin LEE , Woo-taek LIM , Inseon JANG
IPC: G10L19/032
CPC classification number: G10L19/032
Abstract: Provided are an apparatus for encoding an audio signal and a method of an operation thereof. An audio signal encoding method includes obtaining quantized linear prediction (LP) coefficients by performing a linear predictive coding (LPC) analysis and quantization on an input audio signal, generating a reference signal by applying discrete Fourier transform (DFT) to the input audio signal, obtaining LP residual coefficients from the reference signal, scaling magnitudes of the LP residual coefficients using the quantized LP coefficients and the reference signal, and quantizing phases of the LP residual coefficients and the scaled magnitudes of the LP residual coefficients.
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22.发明公开公开(公告)号：US20230230604A1
公开(公告)日：2023-07-20
申请号：US18099119
申请日：2023-01-19
Applicant: Electronics and Telecommunications Research Institute , Gwangju Institute of Science and Technology
Inventor： Inseon JANG , Tae Jin LEE , Seung Kwon BEACK , Jongmo SUNG , Woo-taek LIM , Byeongho CHO , Jongwon SHIN , Soojoong HWANG , Eunkyun LEE , Youngwon CHOI , Sangwook HAN
CPC classification number: G10L19/0204 , G10L25/30
Abstract: A method of encoding an audio signal and an encoder and a method of decoding an audio signal and a decoder are provided. The method of encoding an audio signal includes outputting a decoded signal by using a bitstream that encodes an audio signal, separating the decoded signal into a low-band signal and a high-band signal by using a sound source separator, upsampling the low-band signal, upsampling the high-band signal, and restoring the audio signal by synthesizing the upsampled low-band signal with the upsampled high-band signal, wherein the bitstream is generated by encoding a superimposed signal in which a signal in a high frequency band of the audio signal is superimposed on a low frequency band of the audio signal.
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公开(公告)号：US20220358940A1
公开(公告)日：2022-11-10
申请号：US17527351
申请日：2021-11-16
Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , Gwangju Institute of Science and Technology
Inventor： Woo-taek LIM , Seung Kwon BEACK , Jongmo SUNG , Tae Jin LEE , Inseon JANG , Jong Won SHIN , Soojoong HWANG , Youngju CHEON , Sangwook HAN
Abstract: Disclosed are methods of encoding and decoding an audio signal using side information, and an encoder and a decoder for performing the methods. The method of encoding an audio signal using side information includes identifying an input signal, the input signal being an original audio signal, extracting side information from the input signal using a learning model trained to extract side information from a feature vector of the input signal, encoding the input signal, and generating a bitstream by combining the encoded input signal and the side information.
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24.发明申请公开(公告)号：US20210398547A1
公开(公告)日：2021-12-23
申请号：US17331416
申请日：2021-05-26
Inventor： Seung Kwon BEACK , Jongmo SUNG , Mi Suk LEE , Tae Jin LEE , Woo-taek LIM , Inseon JANG
IPC: G10L19/035 , G10L19/022 , G10L19/06 , G10L19/16
Abstract: An audio signal encoding method performed by an encoder includes identifying an audio signal of a time domain in units of a block, generating a combined block by combining i) a current original block of the audio signal and ii) a previous original block chronologically adjacent to the current original block, extracting a first residual signal of a frequency domain from the combined block using linear predictive coding of a time domain, overlapping chronologically adjacent first residual signals among first residual signals converted into a time domain, and quantizing a second residual signal of a time domain extracted from the overlapped first residual signal by converting the second residual signal of the time domain into a frequency domain using linear predictive coding of a frequency domain.
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25.发明申请公开(公告)号：US20210390967A1
公开(公告)日：2021-12-16
申请号：US17242828
申请日：2021-04-28
Inventor： Seung Kwon Beack , Jongmo SUNG , Mi Suk LEE , Tae Jin LEE , Woo-taek LIM , Inseon JANG , Jin Soo CHOI
IPC: G10L19/032 , G10L19/08
Abstract: Disclosed is a method of encoding and decoding an audio signal using linear predictive coding (LPC) and an encoder and a decoder that perform the method. The method of encoding an audio signal to be performed by the encoder includes identifying a time-domain audio signal block-wise, quantizing a linear prediction coefficient obtained from a block of the audio signal through the LPC, generating an envelope based on the quantized linear prediction coefficient, extracting a residual signal based on the envelope and a result of converting the block into a frequency domain, grouping the residual signal by each sub-band and determining a scale factor for quantizing the grouped residual signal, quantizing the residual signal using the scale factor, and converting the quantized residual signal and the quantized linear prediction coefficient into a bitstream and transmitting the bitstream to a decoder.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20210174815A1
公开(公告)日：2021-06-10
申请号：US17112480
申请日：2020-12-04
Inventor： Seung Kwon BEACK , Jooyoung LEE , Jongmo SUNG , Mi Suk LEE , Tae Jin LEE , Woo-taek LIM , Seunghyun CHO , Jin Soo CHOI
IPC: G10L19/038 , G10L25/30 , G10L19/028 , G10L19/24 , G06N3/02
Abstract: Disclosed are a quantizing method for a latent vector and a computing device for performing the quantization method. A quantizing method of a latent vector includes performing information shaping on the latent vector resulting from reduction in a dimension of an input signal using a target neural network; clamping a residual signal of the latent vector derived based on the information shaping; performing resealing on the clamped residual signal; and performing quantization on the resealed residual signal.
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27.发明申请公开(公告)号：US20210166706A1
公开(公告)日：2021-06-03
申请号：US17105835
申请日：2020-11-27
Inventor： Woo-taek LIM , Seung Kwon BEACK , Jongmo SUNG , Mi Suk LEE , Tae Jin LEE
IPC: G10L19/16 , G10L19/038 , G10L25/30 , G06N3/08
Abstract: Disclosed is an apparatus and method for encoding/decoding an audio signal using information of a previous frame. An audio signal encoding method includes: generating a current latent vector by reducing dimension of a current frame of an audio signal; generating a concatenation vector by concatenating a previous latent vector generated by reducing dimension of a previous frame of the audio signal with the current latent vector; and encoding and quantizing the concatenation vector.
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公开(公告)号：US20210074306A1
公开(公告)日：2021-03-11
申请号：US17017413
申请日：2020-09-10
Inventor： Jongmo SUNG , Seung Kwon BEACK , Mi Suk LEE , Tae Jin LEE , Woo-taek LIM , Jin Soo CHOI
IPC: G10L19/032 , H03M7/30 , G06N3/08 , G06N5/04
Abstract: Provided are an audio encoding method, an audio decoding method, an audio encoding apparatus, and an audio decoding apparatus using dynamic model parameters. The audio encoding method using dynamic model parameters may use dynamic model parameters corresponding to each of the levels of the encoding network when reducing the dimension of an audio signal in the encoding network. In addition, the audio decoding method using the dynamic model parameter may use a dynamic model parameter corresponding to each of the levels of the decoding network when extending the dimension of an audio signal in an encoding network.
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29.发明申请公开(公告)号：US20200302949A1
公开(公告)日：2020-09-24
申请号：US16562110
申请日：2019-09-05
Inventor： Young Ho JEONG , Sang Won SUH , Tae Jin LEE , Woo-taek LIM , Hui Yong KIM
Abstract: Provided is a sound event recognition method that may improve a sound event recognition performance using a correlation between difference sound signal feature parameters based on a neural network, in detail, that may extract a sound signal feature parameter from a sound signal including a sound event, and recognize the sound event included in the sound signal by applying a convolutional neural network (CNN) trained using the sound signal feature parameter.
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公开(公告)号：US20200302917A1
公开(公告)日：2020-09-24
申请号：US16657605
申请日：2019-10-18
Applicant: Electronics and Telecommunications Research Institute , GANGNEUNG-WONJU NATIONAL UNIVERSITY INDUSTRY ACADEMY COOPERATION GROUP
Inventor： Young Ho JEONG , Sang Won SUH , Woo-taek LIM , SUNG WOOK PARK , HYEON GI MOON , YOUNG CHEOL PARK , SHIN HYUK JEON
Abstract: A data augmentation method includes extracting one or more basis vectors and coefficient vectors corresponding to sound source data classified in advance into a target class by applying non-negative matrix factorization (NMF) to the sound source data, generating a new basis vector using the extracted basis vectors, and generating new sound source data using the generated new basis vector and the extracted coefficient vectors.
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