公开(公告)号：US20210118451A1

公开(公告)日：2021-04-22

申请号：US17138106

申请日：2020-12-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Eun-mi OH

IPC: G10L19/002 ,  G10L19/02 ,  G10L21/038

Abstract: A high-band encoding/decoding method and device for bandwidth extension are provided. A high-band encoding method comprising the steps of: generating sub band-specific bit allocation information on the basis of a low-band envelope; determining, on the basis of the sub band-specific bit allocation information, the sub band requiring an envelope update in a high band; and generating, for the determined sub band, refinement data relating to the envelope update. A high-band decoding method comprising the steps of: generating sub band-specific bit allocation information on the basis of a low-band envelope; determining, on the basis of the sub band-specific bit allocation information, the sub band requiring an envelope update in a high band; and decoding, for the determined sub band, refinement data relating to the envelope update, thereby updating the envelope.

公开(公告)号：US20210090581A1

公开(公告)日：2021-03-25

申请号：US17111893

申请日：2020-12-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Eun-mi OH

IPC: G10L19/00 ,  G10L19/032 ,  G10L21/00

Abstract: A lossless encoding method is provided that includes determining a lossless encoding mode of a quantization coefficient as one of an infinite-range lossless encoding mode and a finite-range lossless encoding mode; encoding the quantization coefficient in the infinite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination; and encoding the quantization coefficient in the finite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination.

公开(公告)号：US20190156850A1

公开(公告)日：2019-05-23

申请号：US16314287

申请日：2017-03-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Holly FRANCOIS ,  Ki-hyun CHOO

IPC: G10L21/0216 ,  G10L21/0364 ,  G10L25/84

Abstract: There is provided a noise suppressor 2 comprising a receiver 4 operable to receive an input audio signal 14 and to produce from the input audio signal 14 a first signal 16 and a second signal 18, the input audio signal 14 comprising desired audio and transmission end noise. The noise suppressor 2 further comprises a first processor 6 operable to perform a first process on the first signal 16, the first process comprising noise suppression to remove at least a portion of the transmission end noise from the first signal 16 before outputting the first signal 16 to a first audio channel 10. The noise suppressor further comprises a second processor 8 operable to perform a second process on the second signal 18, the second process comprising outputting the second signal 18 to a second audio channel 12. The first process comprises more aggressive noise suppression than the second process.

公开(公告)号：US20190115037A1

公开(公告)日：2019-04-18

申请号：US16215079

申请日：2018-12-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Eun-mi OH ,  Ho-sang SUNG

IPC: G10L19/12 ,  G10L19/24 ,  G10L21/038 ,  G10L19/038

Abstract: A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The coding apparatus may down-sample an input signal, perform core coding on the down-sampled input signal, perform frequency transformation on the input signal, and perform bandwidth extension coding by using a base signal of the input signal in a frequency domain.

公开(公告)号：US20180068674A1

公开(公告)日：2018-03-08

申请号：US15810636

申请日：2017-11-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Eun-mi OH ,  Ho-sang SUNG ,  Jung-hoe KIM ,  Mi-young KIM

IPC: G10L21/038 ,  G10L19/028 ,  G10L19/02

CPC classification number: G10L21/038 ,  G10L19/0204 ,  G10L19/028

Abstract: A method and apparatus to encoding or decoding an audio signal is provided. In the method and apparatus, a noise-floor level to use in encoding or decoding a high frequency signal is updated according to the degree of a voiced or unvoiced sound included in the signal.

公开(公告)号：US20140257822A9

公开(公告)日：2014-09-11

申请号：US13686015

申请日：2012-11-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chang-yong SON ,  Eun-mi OH ,  Ki-hyun CHOO ,  Jung-hoe KIM

IPC: G10L21/00

CPC classification number: G10L21/038 ,  G10L19/0204 ,  G10L19/08 ,  G10L21/00

Abstract: Provided are a method and apparatus for encoding and decoding an audio signal. According to the present application, a signal of a high frequency band above a preset frequency band is adaptively encoded or decoded in the time domain or in the frequency domain by using a signal of a low frequency band below the preset frequency band. As such, the sound quality of a high frequency signal is not deteriorate even when an audio signal is encoded or decoded by using a small number of bits and thus coding efficiency may be maximized.

Abstract translation: 提供了一种用于对音频信号进行编码和解码的方法和装置。 根据本申请，通过使用低于预设频带的低频信号，在时域或频域中自适应地编码或解码高于预置频带的高频带的信号。 因此，即使当通过使用少量位来对音频信号进行编码或解码时，高频信号的声音质量也不会恶化，从而可以使编码效率最大化。

公开(公告)号：US20140188465A1

公开(公告)日：2014-07-03

申请号：US14079090

申请日：2013-11-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Anton Victorovich POROV ,  Konstantin Sergeevich OSIPOV ,  Nam-suk LEE

IPC: G10L19/12

CPC classification number: G10L19/12 ,  G10L19/00 ,  G10L19/20 ,  G10L19/22

Abstract: Provided are a method and an apparatus for determining an encoding mode for improving the quality of a reconstructed audio signal. A method of determining an encoding mode includes determining one from among a plurality of encoding modes including a first encoding mode and a second encoding mode as an initial encoding mode in correspondence to characteristics of an audio signal, and if there is an error in the determination of the initial encoding mode, generating a modified encoding mode by modifying the initial encoding mode to a third encoding mode.

Abstract translation: 提供了一种用于确定用于提高重构音频信号的质量的编码模式的方法和装置。 确定编码模式的方法包括：根据音频信号的特性，将包括第一编码模式和第二编码模式的多个编码模式之一确定为初始编码模式，并且如果在所述确定中存在错误 的初始编码模式，通过将初始编码模式修改为第三编码模式来生成修改的编码模式。

公开(公告)号：US20200294514A1

公开(公告)日：2020-09-17

申请号：US16887021

申请日：2020-05-29

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO

IPC: G10L19/00 ,  G10L19/002 ,  G10L19/18 ,  G10L19/22

Abstract: The lossless coding method includes selecting one of a first coding method and a second coding method, based on a range in which a quantization index of energy is represented, and coding the quantization index by using the selected coding method. The lossless decoding method includes determining a coding method of a differential quantization index of energy included in a bitstream and decoding the differential quantization index by using one of a first decoding method and a second decoding method based on a range in which a quantization index of energy is represented, in response to the determined coding method.

公开(公告)号：US20190385627A1

公开(公告)日：2019-12-19

申请号：US16538427

申请日：2019-08-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun CHOO ,  Eun-mi OH ,  Seon-ho HWANG

IPC: G10L19/12 ,  G10L21/038 ,  G10L19/18 ,  G10L19/012 ,  G10L19/16

Abstract: Disclosed are a method and an apparatus for high frequency decoding for bandwidth extension. The method for high frequency decoding for bandwidth extension comprises the steps of: decoding an excitation class; transforming a decoded low frequency spectrum on the basis of the excitation class; and generating a high frequency excitation spectrum on the basis of the transformed low frequency spectrum. The method and apparatus for high frequency decoding for bandwidth extension according to an embodiment can transform a restored low frequency spectrum and generate a high frequency excitation spectrum, thereby improving the restored sound quality without an excessive increase in complexity.

公开(公告)号：US20190027156A1

公开(公告)日：2019-01-24

申请号：US15757547

申请日：2016-09-05

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ho-sang SUNG ,  Holly FRANCOIS ,  Ki-hyun CHOO ,  Eun-mi OH ,  Kyung-hun JUNG ,  Yaodu WEI

IPC: G10L19/028 ,  G10L21/0208

CPC classification number: G10L19/028 ,  G10L19/22 ,  G10L19/265 ,  G10L21/0208 ,  G10L21/038 ,  G10L2019/0013 ,  H04M3/2236

Abstract: 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.