Electronics and Telecommunications Research Institute

The Korea Development Bank

Yonsei University

Etri

Jong Mo Sung

Tae Jin Lee

Seung Kwon Beack

Jeong Il Seo

Dae Young Jang

Jin Woong Kim

Kyeong Ok Kang

Yong Ju Lee

Keun Woo Choi

Tae Jin Park

Jin Soo Choi

Jae Hyoun Yoo

In Seon Jang

Byeong Ho Cho

Soo In Lee

Ji Hyun Lee

Byung Sun Lee

Mi Suk Lee

Hong Goo Kang

Yun Jeong Song

Hyoung Soo Lim

Hyun Joo Bae

Eung Don Lee

Chan Woo Lee

Kyu Tae Yang

Woo Taek Lim

Bong Ho Lee

Jeong Ii Seo

Hyung Seob Lim

Seung Kwon Baeck

A method for encoding an input signal using N flow blocks (N is a natural number greater than or equal to 2) and (N−1) split block(s), which is performed by a processor, may comprise: transmitting, by a k-th flow block (k is a natural number greater than or equal to 1 and less than or equal to N−1) among the N flow blocks, a k-th transformation signal obtained by transforming a received signal into a latent representation to a k-th split block among the (N−1) split block(s); splitting, by the k-th split block, the k-th transformation signal by a predetermined ratio, into a first split signal and a second split signal; transmitting, by the k-th split block, the first split signal to a (k+1)-th flow block; and quantizing a signal transformed by an N-th flow block and the second split signals using a quantization block.

Method for encoding and decoding audio signal using normalizing flow, and training method thereof

A method, executed by a processor for compressing an audio signal in multiple layers, may comprise: (a) restoring, in a highest layer, an input audio signal as a first signal; (b) restoring, in at least one intermediate layer, a signal obtained by subtracting an upsampled signal, which is obtained by upsampling the audio signal restored in the highest layer or an immediately previous intermediate layer, from the input audio signal as a second signal; and (c) restoring, in a lowest layer, a signal obtained by subtracting an upsampled signal, which is obtained by upsampling the audio signal restored in an intermediate layer immediately before the lowest layer, from the input audio signal as a third signal, wherein the first signal, the second signal, and the third signal are combined to output a final restoration audio signal.

Audio signal compression method and apparatus using deep neural network-based multilayer structure and training method thereof

Disclosed is a binaural rendering method and apparatus for decoding a multichannel audio signal. The binaural rendering method may include: extracting an early reflection component and a late reverberation component from a binaural filter; generating a stereo audio signal by performing binaural rendering of a multichannel audio signal base on the early reflection component; and applying the late reverberation component to the generated stereo audio signal.

Binaural rendering method and apparatus for decoding multi channel audio

An encoding method for a multi-channel audio signal, an encoding apparatus for performing the encoding method, and a decoding method for a multi-channel audio signal and a decoding apparatus for performing the decoding method are disclosed. A method and apparatus of bypassing an MPEG Surround (MPS) standard operation and using an arbitrary tree when a number of audio signals of N channels exceeds a channel number defined in an MPS standard, is disclosed.

Encoding method and encoder for multi-channel audio signal, and decoding method and decoder for multi-channel audio signal

An audio encoding apparatus and method that encodes hybrid contents including an object sound, a background sound, and metadata, and an audio decoding apparatus and method that decodes the encoded hybrid contents are provided. The audio encoding apparatus may include a mixing unit to generate an intermediate channel signal by mixing a background sound and an object sound, a matrix information encoding unit to encode matrix information used for the mixing, an audio encoding unit to encode the intermediate channel signal, and a metadata encoding unit to encode metadata including control information of the object sound.

Audio encoding apparatus and method, audio decoding apparatus and method, and audio reproducing apparatus

An encoder and an encoding method for a multi-channel signal, and a decoder and a decoding method for a multi-channel signal are disclosed. A multi-channel signal may be efficiently processed by consecutive downmixing or upmixing.

Encoder and encoding method for multi-channel signal, and decoder and decoding method for multi-channel signal

An audio encoding apparatus to encode an audio signal using lossless coding or lossy coding and an audio decoding apparatus to decode an encoded audio signal are disclosed. An audio encoding apparatus according to an exemplary embodiment may include an input signal type determination unit to determine a type of an input signal based on characteristics of the input signal, a residual signal generation unit to generate a residual signal based on an output signal from the input signal type determination unit, and a coding unit to perform lossless coding or lossy coding using the residual signal.

Audio encoding apparatus and method, and audio decoding apparatus and method

Disclosed are a multi-channel audio signal processing method and a multi-channel audio signal processing apparatus. The multi-channel audio signal processing method may generate N channel output signals from N/2 channel downmix signals based on an N-N/2-N structure.

Multichannel audio signal processing method and device

Provided are an encoding method of a multichannel signal, an encoding apparatus to perform the encoding method, a multichannel signal processing method, and a decoding apparatus to perform the decoding method. The decoding method may include identifying an N/2-channel downmix signal derived from an N-channel input signal; and generating an N-channel output signal from the identified N/2-channel downmix signal using a plurality of one-to-two (OTT) boxes. If a low frequency effect (LFE) channel is absent in the output signal, the number of OTT boxes may be equal to N/2 where N/2 denotes the number of channels of the downmix signal.

Multichannel signal processing method, and multichannel signal processing apparatus for performing the method

Method for encoding multi-channel audio signal and encoding device for performing encoding method, and method for decoding multi-channel audio signal and decoding device for performing decoding method

Growing community of inventors

Daejeon, South Korea

Jong Mo Sung