公开(公告)号：US20190355367A1

公开(公告)日：2019-11-21

申请号：US16526430

申请日：2019-07-30

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：US10468046B2

公开(公告)日：2019-11-05

申请号：US16039110

申请日：2018-07-18

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun Choo ,  Anton Victorovich Porov ,  Konstantin Sergeevich Osipov ,  Nam-suk Lee

IPC: G10L19/12 ,  G10L19/22 ,  G10L19/00 ,  G10L19/20

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.

公开(公告)号：US10468035B2

公开(公告)日：2019-11-05

申请号：US15129184

申请日：2015-03-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun Choo ,  Eun-mi Oh

IPC: G10L19/00 ,  G10L21/00 ,  G10L21/04 ,  G10L19/002 ,  G10L19/02 ,  G10L21/038

Abstract: Disclosed are a high-band encoding/decoding method and device for bandwidth extension. 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：US10424304B2

公开(公告)日：2019-09-24

申请号：US14687008

申请日：2015-04-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun Choo ,  Eun-mi Oh

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/032 ,  G10L19/035 ,  G10L19/02

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：US10325604B2

公开(公告)日：2019-06-18

申请号：US15858308

申请日：2017-12-29

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ho-sang Sung ,  Ki-hyun Choo ,  Jung-hoe Kim ,  Eun-mi Oh ,  Chang-yong Son ,  Kang-eun Lee

IPC: G10L19/00 ,  G10L19/005 ,  G10L19/022

Abstract: Provided are a frame error concealment method and apparatus and an error concealment scheme construction method and apparatus. The frame error concealment method includes generating a new signal by synthesizing a plurality of previous signals that are similar to a signal of an error frame and reconstructing the signal of the error frame using the generated signal.

公开(公告)号：US20190158833A1

公开(公告)日：2019-05-23

申请号：US16259341

申请日：2019-01-28

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ho-sang Sung ,  Ki-hyun Choo ,  Eun-mi Oh

IPC: H04N19/124 ,  G10L19/24 ,  H04N19/196 ,  G10L19/032 ,  H03M13/31 ,  H03M13/15 ,  H04N19/40 ,  G10L19/16 ,  H03M13/05

CPC classification number: H04N19/124 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/035 ,  G10L19/038 ,  G10L19/167 ,  G10L19/24 ,  H03M13/05 ,  H03M13/156 ,  H03M13/31 ,  H04N19/196 ,  H04N19/40

Abstract: A spectrum coding method includes quantizing spectral data of a current band based on a first quantization scheme, generating a lower bit of the current band using the spectral data and the quantized spectral data, quantizing a sequence of lower bits including the lower bit of the current band based on a second quantization scheme, and generating a bitstream based on a upper bit excluding N bits, where N is 1 or greater, from the quantized spectral data and the quantized sequence of lower bits.

公开(公告)号：US10090004B2

公开(公告)日：2018-10-02

申请号：US15121257

申请日：2015-02-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun Choo ,  Anton Viktorovich Porov ,  Konstantin Sergeevich Osipov

IPC: G10L11/06 ,  G10L25/81 ,  G10L19/20 ,  G10L19/005 ,  G10L19/02 ,  G10L19/022 ,  G10L19/125

Abstract: The present invention relates to an audio encoding and, more particularly, to a signal classifying method and device, and an audio encoding method and device using the same, which can reduce a delay caused by an encoding mode switching while improving the quality of reconstructed sound. The signal classifying method may comprise the operations of: classifying a current frame into one of a speech signal and a music signal; determining, on the basis of a characteristic parameter obtained from multiple frames, whether a result of the classifying of the current frame includes an error; and correcting the result of the classifying of the current frame in accordance with a result of the determination. By correcting an initial classification result of an audio signal on the basis of a correction parameter, the present invention can determine an optimum coding mode for the characteristic of an audio signal and can prevent frequent coding mode switching between frames.

公开(公告)号：US10037766B2

公开(公告)日：2018-07-31

申请号：US15676209

申请日：2017-08-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ki-hyun Choo

IPC: G10L19/02 ,  G10L21/038 ,  G10L19/032 ,  G10L19/12

CPC classification number: G10L21/038 ,  G10L19/032 ,  G10L19/12

Abstract: An apparatus for generating a bandwidth extended signal includes an anti-sparseness processing unit to perform anti-sparseness processing on a low-frequency spectrum; and a frequency domain high-frequency extension decoding unit to perform high-frequency extension encoding in the frequency domain on the low-frequency spectrum on which the anti-sparseness processing is performed.

公开(公告)号：US20180075857A1

公开(公告)日：2018-03-15

申请号：US15822392

申请日：2017-11-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Ho-sang Sung ,  Jie Zhan ,  Ki-hyun Choo

IPC: G10L19/20 ,  G10L19/18 ,  G10L19/22

CPC classification number: G10L19/20 ,  G10L19/18 ,  G10L19/22 ,  G10L25/78 ,  G10L25/81 ,  G10L25/90

Abstract: Provided is a method and apparatus for determining a signal coding mode. The signal coding mode may be determined or changed according to whether a current frame corresponds to a silence period and by using a history of speech or music presence possibilities.

公开(公告)号：US09858934B2

公开(公告)日：2018-01-02

申请号：US15450672

申请日：2017-03-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Anton Porov ,  Konstantin Osipov ,  Ki-hyun Choo

IPC: G06F17/28 ,  G10L19/00 ,  G10L19/02 ,  G10L19/008 ,  G10L19/002 ,  G10L19/032 ,  G10L19/16

CPC classification number: G10L19/0017 ,  G10L19/002 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/167

Abstract: Provided is an audio encoding method. The audio encoding method includes: acquiring envelopes based on a predetermined sub-band for an audio spectrum; quantizing the envelopes based on the predetermined sub-band; and obtaining a difference value between quantized envelopes for adjacent sub-bands and lossless encoding a difference value of a current sub-band by using a difference value of a previous sub-band as a context. Accordingly, the number of bits required to encode envelope information of an audio spectrum may be reduced in a limited bit range, thereby increasing the number of bits required to encode an actual spectral component.