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    Method and apparatus for encoding and decoding audio/speech signal
    16.
    发明授权
    Method and apparatus for encoding and decoding audio/speech signal 有权
    用于对音频/语音信号进行编码和解码的方法和装置

    公开(公告)号：US09418666B2

    公开(公告)日：2016-08-16

    申请号：US14132224

    申请日：2013-12-18

    Applicant: SAMSUNG Electronics Co., Ltd.

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

    IPC: G10L19/00 ,  G10L19/025

    CPC classification number: G10L19/00 ,  G10L19/025

    Abstract: Provided is a method of encoding an audio/speech signal, the method including determining a variable length of a frame, that is, a processing unit of an input signal in accordance with a position of an attack in the input signal; transforming each frame of the input signal to a frequency domain and dividing the frame into a plurality of sub frequency bands; and, if a signal of a sub frequency band is determined to be encoded in the frequency domain, encoding the signal of the sub frequency band in the frequency domain, and if the signal of the sub frequency band is determined to be encoded in a time domain, inverse transforming the signal of the sub frequency band to the time domain and encoding the inverse transformed signal in the time domain. According to the present invention, the audio/speech signal may be efficiently encoded by controlling time resolution and frequency resolution.

    Abstract translation: 提供了一种对音频/语音信号进行编码的方法，该方法包括根据输入信号中的攻击位置来确定帧的可变长度，即输入信号的处理单元; 将所述输入信号的每个帧变换为频域并将所述帧划分为多个子频带; 并且如果确定在频域中编码子频带的信号，则对频域中的子频带的信号进行编码，并且如果确定子频带的信号被编码在一个时间 域，将子频带的信号逆变换到时域，并对时域中的逆变换信号进行编码。 根据本发明，可以通过控制时间分辨率和频率分辨率来有效地编码音频/语音信号。

    High-band encoding method and device, and high-band decoding method and device
    18.
    发明授权
    High-band encoding method and device, and high-band decoding method and device 有权

    公开(公告)号：US11688406B2

    公开(公告)日：2023-06-27

    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 ,  G10L21/038 ,  G10L19/02

    CPC classification number: G10L19/002 ,  G10L19/02 ,  G10L19/0204 ,  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.

    Method and apparatus for high frequency decoding for bandwidth extension
    19.
    发明授权
    Method and apparatus for high frequency decoding for bandwidth extension 有权

    公开(公告)号：US10803878B2

    公开(公告)日：2020-10-13

    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 ,  G10L19/08

    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.

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