公开(公告)号：US20220020385A1

公开(公告)日：2022-01-20

申请号：US17377157

申请日：2021-07-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Kwon Beack ,  Jongmo Sung ,  Mi Suk Lee ,  Tae Jin Lee ,  Woo-taek Lim ,  Inseon Jang ,  Jin Soo Choi

IPC: G10L19/06 ,  G10L19/032

Abstract: An audio signal encoding method performed by an encoder includes identifying a time-domain audio signal in a unit of blocks, quantizing a linear prediction coefficient extracted from a combined block in which a current original block of the audio signal and a previous original block chronologically adjacent to the current original block using frequency-domain linear predictive coding (LPC), generating a temporal envelope by dequantizing the quantized linear prediction coefficient, extracting a residual signal from the combined block based on the temporal envelope, quantizing the residual signal by one of time-domain quantization and frequency-domain quantization, and transforming the quantized residual signal and the quantized linear prediction coefficient into a bitstream.

公开(公告)号：US20210005208A1

公开(公告)日：2021-01-07

申请号：US16686859

申请日：2019-11-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Kwon Beack ,  Jongmo Sung ,  Mi Suk Lee ,  Tae Jin Lee ,  Hui Yong Kim

IPC: G10L19/02 ,  G10L19/032 ,  G06N3/08 ,  G06N3/04

Abstract: Disclosed is a method of processing a residual signal for audio coding and an audio coding apparatus. The method learns a feature map of a reference signal through a residual signal learning engine including a convolutional layer and a neural network and performs learning based on a result obtained by mapping a node of an output layer of the neural network and a quantization level of index of the residual signal.

公开(公告)号：US11823688B2

公开(公告)日：2023-11-21

申请号：US17390753

申请日：2021-07-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  The Trustees of Indiana University

Inventor： Woo-taek Lim ,  Seung Kwon Beack ,  Jongmo Sung ,  Tae Jin Lee ,  Inseon Jang ,  Minje Kim

IPC: G10L19/008 ,  G06N3/04 ,  G10L19/032 ,  G10L19/24

CPC classification number: G10L19/008 ,  G06N3/04 ,  G10L19/032

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.

公开(公告)号：US11783844B2

公开(公告)日：2023-10-10

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

IPC: G10L17/02 ,  G10L21/00 ,  G10L19/00 ,  G10L19/02 ,  G10L25/30 ,  G10L25/21 ,  G06N3/045

CPC classification number: G10L19/02 ,  G06N3/045 ,  G10L25/21 ,  G10L25/30

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.

公开(公告)号：US11581000B2

公开(公告)日：2023-02-14

申请号：US17105835

申请日：2020-11-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Woo-Taek Lim ,  Seung Kwon Beack ,  Jongmo Sung ,  Mi Suk Lee ,  Tae Jin Lee

IPC: G10L19/00 ,  G10L25/30 ,  G10L19/16 ,  G06N3/08 ,  G10L19/038

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.

公开(公告)号：US11580999B2

公开(公告)日：2023-02-14

申请号：US17331416

申请日：2021-05-26

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Kwon Beack ,  Jongmo Sung ,  Mi Suk Lee ,  Tae Jin Lee ,  Woo-taek Lim ,  Inseon Jang

IPC: G10L19/022 ,  G10L19/06 ,  G10L19/16 ,  G10L19/035

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.

公开(公告)号：US11276413B2

公开(公告)日：2022-03-15

申请号：US16543095

申请日：2019-08-16

Applicant: Electronics and Telecommunications Research Institute ,  THE TRUSTEES OF INDIANA UNIVERSITY

Inventor： Mi Suk Lee ,  Jongmo Sung ,  Minje Kim ,  Kai Zhen

IPC: G10L15/00 ,  G10L19/16

Abstract: Disclosed are an audio signal encoding method and audio signal decoding method, and an encoder and decoder performing the same. The audio signal encoding method includes applying an audio signal to a training model including N autoencoders provided in a cascade structure, encoding an output result derived through the training model, and generating a bitstream with respect to the audio signal based on the encoded output result.