公开(公告)号：US08010352B2

公开(公告)日：2011-08-30

申请号：US11766331

申请日：2007-06-21

Applicant: Chang-yong Son ,  Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

Inventor： Chang-yong Son ,  Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC: G10L19/12

CPC classification number: G10L21/038

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：US20100324912A1

公开(公告)日：2010-12-23

申请号：US12801632

申请日：2010-06-17

Applicant: Ki Hyun Choo ,  Jung-Hoe Kim ,  Eun Mi Oh

Inventor： Ki Hyun Choo ,  Jung-Hoe Kim ,  Eun Mi Oh

IPC: G10L19/00

CPC classification number: G10L19/20 ,  G10L19/0017 ,  H03M7/4006 ,  H03M7/4012 ,  H03M7/4018

Abstract: Disclosed are a context-based arithmetic encoding apparatus and method and a context-based arithmetic decoding apparatus and method. The context-based arithmetic decoding apparatus may determine a context of a current N-tuple to be decoded, determine a Most Significant Bit (MSB) context corresponding to an MSB symbol of the current N-tuple, and determine a probability model using the context of the N-tuple and the MSB context. Subsequently, the context-based arithmetic decoding apparatus may perform a decoding on an MSB based on the determined probability model, and perform a decoding on a Least Significant Bit (LSB) based on a bit depth of the LSB derived from a process of decoding on an escape code.

Abstract translation: 公开了一种基于上下文的算术编码装置和方法以及基于上下文的算术解码装置和方法。 基于上下文的算术解码装置可以确定要解码的当前N元组的上下文，确定与当前N元组的MSB符号相对应的最高有效位（MSB）上下文，并使用上下文确定概率模型 的N元组和MSB上下文。 随后，基于上下文的算术解码装置可以基于所确定的概率模型对MSB执行解码，并且基于从解码处理导出的LSB的位深度对最低有效位（LSB）执行解码 一个转义码。

公开(公告)号：US20100145688A1

公开(公告)日：2010-06-10

申请号：US12591949

申请日：2009-12-04

Applicant: Ho Sang Sung ,  Ki Hyun Choo ,  Jung Hoe Kim ,  Eun Mi Oh

Inventor： Ho Sang Sung ,  Ki Hyun Choo ,  Jung Hoe Kim ,  Eun Mi Oh

IPC: G10L19/04 ,  G10L11/06 ,  G10L21/00 ,  G10L19/12

CPC classification number: G10L19/12 ,  G10L19/20 ,  G10L25/93

Abstract: An apparatus and a method to encode and decode a speech signal using an encoding mode are provided. An encoding apparatus may select an encoding mode of a frame included in an input speech signal, and encode a frame having an unvoiced mode for an unvoiced speech as the selected encoding mode.

Abstract translation: 提供了一种使用编码模式对语音信号进行编码和解码的装置和方法。 编码装置可以选择包括在输入语音信号中的帧的编码模式，并且将具有用于无声语音的无声模式的帧编码为所选择的编码模式。

公开(公告)号：US20100014679A1

公开(公告)日：2010-01-21

申请号：US12458450

申请日：2009-07-13

Applicant: Jung-hoe Kim ,  Ki-hyun Choo ,  Kirill Yurkov ,  Boris Kudryashov

Inventor： Jung-hoe Kim ,  Ki-hyun Choo ,  Kirill Yurkov ,  Boris Kudryashov

IPC: H04R5/00

CPC classification number: G10L19/008 ,  G10L19/0212 ,  G10L19/04 ,  G10L25/12

Abstract: Provided are a multi-channel encoding and decoding method and apparatus capable of encoding and decoding residual signal by removing redundant information between a plurality of channels without a downmixed signal. In the method and apparatus, a reference signal which is to be used for encoding from a plurality of channel signals, the phase differences between the respective channel signals and the reference signal, gains which are the ratios of the amplitudes of the respective channel signals to the amplitude of the reference signal, and residual signals which correspond to differences between predicted signals and the actual channel signals, are encoded or decoded. The predicted signals are obtained by applying the phase differences and gains to the reference signal.

Abstract translation: 提供了一种多通道编码和解码方法和装置，其能够通过在多个通道之间移除冗余信息来编码和解码残余信号而不需要下混合信号。 在该方法和装置中，将用于从多个信道信号进行编码的参考信号，各个信道信号和参考信号之间的相位差，作为各个信道信号的振幅比的增益 参考信号的幅度和对应于预测信号与实际信道信号之间的差的残差信号被编码或解码。 通过将相位差和增益应用于参考信号来获得预测信号。

公开(公告)号：US20090110201A1

公开(公告)日：2009-04-30

申请号：US12107117

申请日：2008-04-22

Applicant: Jung-hoe KIM ,  Eun-mi Oh ,  Konstantly Osipov ,  Ki-hyun Choo

Inventor： Jung-hoe KIM ,  Eun-mi Oh ,  Konstantly Osipov ,  Ki-hyun Choo

IPC: H04H20/47

CPC classification number: H04H40/36 ,  G10L19/008 ,  H04H20/47 ,  H04H20/88

Abstract: A multi-channel signal decoding method is provided. A down-mixed signal representative of a multi-channel signal is decoded, and parameters representing characteristic relations between channels of the multi-channel signal are decoded. An additional parameter is estimated by using the decoded parameters, and the decoded down-mixed signal is up-mixed by using the decoded parameters and the estimated parameter so as to decode the multi-channel signal.

Abstract translation: 提供了一种多通道信号解码方法。 解码表示多声道信号的下混信号，并对表示多声道信号的声道之间的特征关系的参数进行解码。 通过使用解码参数来估计附加参数，并且通过使用解码参数和估计参数对解码的下混合信号进行混合，以解码多声道信号。

公开(公告)号：US20080253276A1

公开(公告)日：2008-10-16

申请号：US11935631

申请日：2007-11-06

Applicant: Kang-eun LEE ,  Ki-hyun Choo ,  Jung-hoe Kim ,  Eun-mi Oh

Inventor： Kang-eun LEE ,  Ki-hyun Choo ,  Jung-hoe Kim ,  Eun-mi Oh

IPC: H04J11/00

CPC classification number: H04N21/4341 ,  H04N21/233 ,  H04N21/236 ,  H04N21/2368 ,  H04N21/434 ,  H04N21/439

Abstract: Provided is a method and apparatus for multiplexing bitstreams that are coded to have different frame lengths using asynchronous time alignment, in which, based on the length of each frame of a bitstream selected as a reference bitstream from among bitstreams coded to have different frame lengths by a plurality of coders, the remaining bitstreams except for the reference bitstream are divided and multiplexed.

Abstract translation: 提供了一种用于复用使用异步时间对准被编码为具有不同帧长度的比特流的方法和装置，其中，基于从被编码为具有不同帧长度的比特流中选择作为参考比特流的比特流的每个帧的长度， 多个编码器，除了参考比特流之外的剩余比特流被分割和多路复用。

公开(公告)号：US20080183465A1

公开(公告)日：2008-07-31

申请号：US11911775

申请日：2006-11-15

Applicant: Chang-Yong Son ,  Eun-Mi Oh ,  Ho-Sang Sung ,  Kang-Eun Lee ,  Ki-Hyun Choo ,  Jung-Hoe Kim

Inventor： Chang-Yong Son ,  Eun-Mi Oh ,  Ho-Sang Sung ,  Kang-Eun Lee ,  Ki-Hyun Choo ,  Jung-Hoe Kim

IPC: G10L19/04

CPC classification number: G10L19/07 ,  G10L2019/0005

Abstract: A method and apparatus to convert a linear predictive coding (LPC) coefficient into a coefficient having order characteristics, such as a line spectrum frequency (LSF), and to vector quantize the coefficient having the order characteristics when a speech signal is encoded. The method and apparatus split the vector of the coefficient having the order characteristics into a plurality of subvectors, select a codebook in which an available bit is variably allocated to each subvector according to distribution of elements of each subvector, and quantize each subvector according to the selected codebook. The method and apparatus use normalized codebooks.

Abstract translation: 将线性预测编码（LPC）系数转换成具有诸如线谱频率（LSF）等阶特征的系数的方法和装置，并且在语音信号被编码时向矢量量化具有阶特征的系数。 该方法和装置将具有有序特征的系数的向量分解为多个子向量，根据每个子向量的元素的分布，选择可用比特被可变地分配给每个子向量的码本，并且根据 所选码本。 该方法和装置使用归一化码本。

公开(公告)号：US20080120095A1

公开(公告)日：2008-05-22

申请号：US11941249

申请日：2007-11-16

Applicant: Eun-mi OH ,  Chang-youg Son ,  Ki-hyun Choo ,  Jung-hoe Kim

Inventor： Eun-mi OH ,  Chang-youg Son ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC: G10L19/00

CPC classification number: G10L19/20 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/032

Abstract: A method and apparatus to encode and/or decode a speech signal and/or an audio signal. The apparatus includes a first domain transforming unit, a frequency domain encoding unit, and a multiplexing unit to encode the speech signal and/or an audio signal. The apparatus includes a demultiplexing unit, a frequency domain decoding unit, and a second domain inverse transformation unit to decode the speech signal and/or the audio signal. The method and apparatus are capable of effectively encoding or decoding all of a speech signal, an audio signal, and a mixed signal of a speech signal and an audio signal, and improving the quality of sound by using a small number of bits.

Abstract translation: 一种用于对语音信号和/或音频信号进行编码和/或解码的方法和装置。 该装置包括第一域变换单元，频域编码单元和用于对语音信号和/或音频信号进行编码的复用单元。 该装置包括解复用单元，频域解码单元和用于解码语音信号和/或音频信号的第二域逆变换单元。 该方法和装置能够有效地编码或解码语音信号，音频信号和语音信号和音频信号的混合信号，并且通过使用少量的比特来提高声音的质量。

公开(公告)号：US20070271480A1

公开(公告)日：2007-11-22

申请号：US11749249

申请日：2007-05-16

Applicant: Eun-mi OH ,  Ho-sang Sung ,  Chang-yong Son ,  Ki-hyun Choo ,  Jung-hoe Kim

Inventor： Eun-mi OH ,  Ho-sang Sung ,  Chang-yong Son ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC: G06F11/00

CPC classification number: G10L19/005

Abstract: A method and apparatus to decode audio data constructed with a plurality of layers. An error concealment method of process a decoded bitstream selects one of a frequency domain and a time domain in order to conceal the errors, detects a position where the errors exist in a frame when the error concealment method in the frequency domain is selected, and conceals the errors only in a segment after the detected position.

Abstract translation: 一种解码由多层构成的音频数据的方法和装置。 处理解码比特流的错误隐藏方法选择频域和时域中的一个以隐藏错误，当选择频域中的错误隐藏方法时，检测在帧中存在错误的位置，并且隐藏 检测到位置之后的错误。

公开(公告)号：US10152983B2

公开(公告)日：2018-12-11

申请号：US13977906

申请日：2011-12-28

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

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

IPC: G10L19/18 ,  G10L19/12 ,  G10L19/24 ,  G10L19/038 ,  G10L21/038 ,  G10L19/00

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.