Patents by Inventor Inseon Jang

Inseon Jang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240087577
    Abstract: Disclosed is an apparatus and method for audio encoding/decoding that is robust against coding distortion in a transition section. An audio encoding method includes outputting a frequency domain signal by time-to-frequency (T/F) transform of an input signal, outputting a frequency domain residual signal in which a frequency axis envelope is removed from the frequency domain signal by applying frequency domain noise shaping (FDNS) encoding to the frequency domain signal, outputting a time domain residual signal in which a time axis envelope is removed by performing linear prediction coefficient (LPC) analysis based on the frequency domain residual signal, and quantizing and transmitting the time domain residual signal.
    Type: Application
    Filed: July 2, 2021
    Publication date: March 14, 2024
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung Kwon BEACK, Jongmo SUNG, Mi Suk LEE, Tae Jin LEE, Woo-taek LIM, Inseon JANG
  • Publication number: 20240055009
    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.
    Type: Application
    Filed: July 10, 2023
    Publication date: February 15, 2024
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Byeongho CHO, Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Woo-taek LIM, Inseon JANG
  • Publication number: 20240013796
    Abstract: A method of encoding a speech signal includes predicting a feature vector of each of a plurality of frames included in the speech signal based on a ground-truth feature vector of a previous frame of each of the plurality of frames, calculating a residual signal corresponding to each of the plurality of frames based on a ground-truth feature vector of each of the plurality of frames and a predicted feature vector of each of the plurality of frames, and generating a bitstring corresponding to each of the plurality of frames by quantizing the residual signal.
    Type: Application
    Filed: September 26, 2023
    Publication date: January 11, 2024
    Applicants: Electronics and Telecommunications Research Institute, The Trustees of Indiana University
    Inventors: Woo-taek LIM, Seung Kwon BEACK, Inseon JANG, Jongmo SUNG, Tae Jin LEE, Byeongho CHO, Minje KIM, Haici YANG
  • Patent number: 11862183
    Abstract: An audio signal encoding and decoding method using a neural network model, a method of training the neural network model, and an encoder and decoder performing the methods are disclosed. The encoding method includes computing the first feature information of an input signal using a recurrent encoding model, computing an output signal from the first feature information using a recurrent decoding model, calculating a residual signal by subtracting the output signal from the input signal, computing the second feature information of the residual signal using a nonrecurrent encoding model, and converting the first feature information and the second feature information to a bitstream.
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: January 2, 2024
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jongmo Sung, Seung Kwon Beack, Mi Suk Lee, Tae Jin Lee, Woo-taek Lim, Inseon Jang
  • Patent number: 11823688
    Abstract: Disclosed are a method of encoding and decoding an audio signal and an encoder and a decoder performing the method. The method of encoding an audio signal includes identifying an input signal, and generating a bitstring of each encoding layer by applying, to the input signal, an encoding model including a plurality of successive encoding layers that encodes the input signal, in which a current encoding layer among the encoding layers is trained to generate a bitstring of the current encoding layer by encoding an encoded signal which is a signal encoded in a previous encoding layer and quantizing an encoded signal which is a signal encoded in the current encoding layer.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: November 21, 2023
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, The Trustees of Indiana University
    Inventors: Woo-taek Lim, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Inseon Jang, Minje Kim
  • Patent number: 11804230
    Abstract: An audio encoding/decoding apparatus and method using vector quantized residual error features are disclosed. An audio signal encoding method includes outputting a bitstream of a main codec by encoding an original signal, decoding the bitstream of the main codec, determining a residual error feature vector from a feature vector of a decoded signal and a feature vector of the original signal, and outputting a bitstream of additional information by encoding the residual error feature vector.
    Type: Grant
    Filed: April 1, 2022
    Date of Patent: October 31, 2023
    Assignees: Electronics and Telecommunications Research Institute, Gwangju Institute of Science and Technology
    Inventors: Inseon Jang, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Woo-taek Lim, Jongwon Shin, Youngju Cheon, Sangwook Han, Soojoong Hwang
  • Publication number: 20230335145
    Abstract: A signal compression method and apparatus and a signal restoration method and apparatus are provided. The signal compression method includes outputting an input signal, obtained by processing an audio signal, which is input, based on a human auditory perception characteristic, using an auditory perception model, extracting a feature vector from the input signal using a feature extraction module, and outputting a code obtained by compressing the feature vector using a trained signal compression model.
    Type: Application
    Filed: March 7, 2023
    Publication date: October 19, 2023
    Applicants: Electronics and Telecommunications Research Institute, Kyungpook National University Industry-Academic Cooperation Foundation
    Inventors: Woo-taek LIM, Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Inseon JANG, Min Han KIM, Seung Hyeon SHIN, Dae Ho LEE, Seok Jin LEE
  • Patent number: 11783844
    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.
    Type: Grant
    Filed: November 16, 2021
    Date of Patent: October 10, 2023
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Woo-taek Lim, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Inseon Jang, Jong Won Shin, Soojoong Hwang, Youngju Cheon, Sangwook Han
  • Publication number: 20230317089
    Abstract: An encoding method, a decoding method, an encoder for performing the encoding method, and a decoder for performing the decoding method are provided. The encoding method includes outputting LP coefficients bitstream and a residual signal by performing an LP analysis on an input signal, outputting a first latent signal obtained by encoding a periodic component of the residual signal, a second latent signal obtained by encoding a non-periodic component of the residual signal, and a weight vector for each of the first latent signal and the second latent signal, using a first neural network module, and outputting a first bitstream obtained by quantizing the first latent signal, a second bitstream obtained by quantizing the second latent signal, and a weight bitstream obtained by quantizing the weight vector, using a quantization module.
    Type: Application
    Filed: January 31, 2023
    Publication date: October 5, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jongmo SUNG, Seung Kwon BEACK, Tae Jin LEE, Woo-taek LIM, Inseon JANG, Byeongho CHO
  • Publication number: 20230298599
    Abstract: An encoding method and an encoding device using a complex signal and a decoding method and a decoding device using a complex signal are provided. The encoding method includes converting a first channel signal and a second channel signal constituting an audio signal corresponding to a stereo signal from a real domain to a complex domain, determining one of a sum operation, a difference operation, and a bypass operation to be performed on the second channel signal converted to the complex domain, determining a complex spatial cue according to the determined operation, converting a residual signal for the second channel signal to a real domain using the complex spatial cue, converting the first channel signal to a real domain, encoding the first channel signal converted to the real domain, and encoding the residual signal for the second channel signal converted to the real domain.
    Type: Application
    Filed: June 12, 2023
    Publication date: September 21, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Woo-taek LIM, Inseon JANG, Byeongho CHO
  • Publication number: 20230274141
    Abstract: Provided is a method and apparatus for designing and testing an audio codec using quantization based on white noise modeling. A neural network-based audio encoder design method includes generating a quantized latent vector and a reconstructed signal corresponding to an input signal by using a white noise modeling-based quantization process, computing a total loss for training a neural network-based audio codec, based on the input signal, the reconstruction signal, and the quantized latent vector, training the neural network-based audio codec by using the total loss, and validating the trained neural network-based audio codec to select the best neural network-based audio codec.
    Type: Application
    Filed: February 8, 2023
    Publication date: August 31, 2023
    Inventors: Jongmo SUNG, Seung Kwon BEACK, Tae Jin LEE, Woo-taek LIM, Inseon JANG, Byeongho CHO, Young Cheol PARK, Joon BYUN, Seungmin SHIN
  • Publication number: 20230245666
    Abstract: Provided are an encoding method, an encoding device, a decoding method, and a decoding device using a scalar quantization and a vector quantization. The encoding method includes converting an input signal of a time domain into a frequency domain, generating a first residual signal from an input signal of a frequency domain by using a scale factor, performing a scalar quantization of the first residual signal, generating a second residual signal from the scalar-quantized first residual signal, performing a lossless encoding of the scalar-quantized first residual signal, performing a vector quantization of the second residual signal, and transmitting a bitstream including the lossless-encoded first residual signal and the vector-quantized second residual signal.
    Type: Application
    Filed: January 27, 2023
    Publication date: August 3, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Woo-taek LIM, Inseon JANG, Byeongho CHO
  • Publication number: 20230230604
    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.
    Type: Application
    Filed: January 19, 2023
    Publication date: July 20, 2023
    Applicants: Electronics and Telecommunications Research Institute, Gwangju Institute of Science and Technology
    Inventors: 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
  • Patent number: 11694703
    Abstract: An audio signal encoding and decoding method using a learning model, a training method of the learning model, and an encoder and decoder that perform the method, are disclosed. The audio signal decoding method may include extracting a first residual signal and a first linear prediction coefficient by decoding a bitstream received from an encoder, generating a first audio signal from the first residual signal using the first linear prediction coefficient, generating a second linear prediction coefficients and a second residual signal from the first audio signal, obtaining a third linear prediction coefficient by inputting the second linear prediction coefficient into a trained learning model, and generating a second audio signal from the second residual signal using the third linear prediction coefficient.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: July 4, 2023
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Woo-taek Lim, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Inseon Jang
  • Patent number: 11664037
    Abstract: Methods of encoding and decoding a speech signal using a neural network model that recognizes sound sources, and encoding and decoding apparatuses for performing the methods are provided. A method of encoding a speech signal includes identifying an input signal for a plurality of sound sources; generating a latent signal by encoding the input signal; obtaining a plurality of sound source signals by separating the latent signal for each of the plurality of sound sources; determining a number of bits used for quantization of each of the plurality of sound source signals according to a type of each of the plurality of sound sources; quantizing each of the plurality of sound source signals based on the determined number of bits; and generating a bitstream by combining the plurality of quantized sound source signals.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: May 30, 2023
    Assignees: Electronics and Telecommunications Research Institute, The Trustees of Indiana University
    Inventors: Woo-taek Lim, Seung Kwon Beack, Jongmo Sung, Mi Suk Lee, Tae Jin Lee, Inseon Jang, Minje Kim, Haici Yang
  • Patent number: 11651778
    Abstract: Disclosed are methods of encoding and decoding an audio signal, and an encoder and a decoder for performing the methods. The method of encoding an audio signal includes identifying an input signal corresponding to a low frequency band of the audio signal, windowing the input signal, generating a first latent vector by inputting the windowed input signal to a first encoding model, transforming the windowed input signal into a frequency domain, generating a second latent vector by inputting the transformed input signal to a second encoding model, generating a final latent vector by combining the first latent vector and the second latent vector, and generating a bitstream corresponding to the final latent vector.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: May 16, 2023
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Woo-taek Lim, Seung Kwon Beack, Jongmo Sung, Tae Jin Lee, Inseon Jang, Jong-Won Seok, Yunsu Kim
  • Publication number: 20230048402
    Abstract: Provided is an encoding method according to various example embodiments and an encoder performing the method. The encoding method includes outputting a linear prediction(LP) coefficients bitstream and a residual signal by performing a linear prediction analysis on an input signal, outputting a first latent signal obtained by encoding a periodic component of the residual signal, using a first neural network module, outputting a first bitstream obtained by quantizing the first latent signal, using a quantization module, outputting a second latent signal obtained by encoding an aperiodic component of the residual signal, using the first neural network module, and outputting a second bitstream obtained by quantizing the second latent signal, using the quantization module, wherein the aperiodic component of the residual signal is calculated based on a periodic component of the residual signal decoded from the quantized first latent signal output by de-quantizing the first bitstream.
    Type: Application
    Filed: August 9, 2022
    Publication date: February 16, 2023
    Inventors: Jongmo SUNG, Seung Kwon BEACK, Tae Jin LEE, Woo-taek KIM, Inseon JANG
  • Patent number: 11580999
    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.
    Type: Grant
    Filed: May 26, 2021
    Date of Patent: February 14, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung Kwon Beack, Jongmo Sung, Mi Suk Lee, Tae Jin Lee, Woo-taek Lim, Inseon Jang
  • Publication number: 20230039546
    Abstract: An audio encoding/decoding apparatus and method using vector quantized residual error features are disclosed. An audio signal encoding method includes outputting a bitstream of a main codec by encoding an original signal, decoding the bitstream of the main codec, determining a residual error feature vector from a feature vector of a decoded signal and a feature vector of the original signal, and outputting a bitstream of additional information by encoding the residual error feature vector.
    Type: Application
    Filed: April 1, 2022
    Publication date: February 9, 2023
    Inventors: Inseon JANG, Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Woo-taek LIM, Jongwon SHIN, Youngju CHEON, Sangwook HAN, Soojoong HWANG
  • Publication number: 20230038394
    Abstract: Disclosed are a method of encoding and decoding an audio signal and an encoder and a decoder performing the method. The method of encoding an audio signal includes identifying an input signal, and generating a bitstring of each encoding layer by applying, to the input signal, an encoding model including a plurality of successive encoding layers that encodes the input signal, in which a current encoding layer among the encoding layers is trained to generate a bitstring of the current encoding layer by encoding an encoded signal which is a signal encoded in a previous encoding layer and quantizing an encoded signal which is a signal encoded in the current encoding layer.
    Type: Application
    Filed: July 30, 2021
    Publication date: February 9, 2023
    Inventors: Woo-taek LIM, Seung Kwon BEACK, Jongmo SUNG, Tae Jin LEE, Inseon JANG, Minje KIM