公开(公告)号：US20110313778A1

公开(公告)日：2011-12-22

申请号：US13220193

申请日：2011-08-29

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

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

IPC分类号： G10L21/00

CPC分类号： G10L21/038

摘要： 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.

摘要翻译： 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：US20080172223A1

公开(公告)日：2008-07-17

申请号：US11976763

申请日：2007-10-26

申请人： Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

发明人： Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC分类号： G10L19/02

CPC分类号： G10L21/038 ,  G10L19/0212 ,  G10L19/12 ,  G10L19/20

摘要： Provided are a method, apparatus, and medium for encoding/decoding a high frequency band signal by using a low frequency band signal corresponding to an audio signal or a speech signal. Accordingly, since the high frequency band signal is encoded and decoded by using the low frequency band signal, encoding and decoding can be carried out with a small data size while avoiding deterioration of sound quality.

摘要翻译： 提供了一种通过使用与音频信号或语音信号对应的低频带信号来对高频带信号进行编码/解码的方法，装置和媒体。 因此，由于通过使用低频带信号对高频带信号进行编码和解码，所以可以以小的数据大小进行编码和解码，同时避免音质的恶化。

公开(公告)号：US20080126096A1

公开(公告)日：2008-05-29

申请号：US11930752

申请日：2007-10-31

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L19/022 ,  H03M13/00

摘要： An error concealment method and apparatus for an audio signal and a decoding method and apparatus for an audio signal using the error concealment method and apparatus. The error concealment method includes selecting one of an error concealment in a frequency domain and an error concealment in a time domain as an error concealment scheme for a current frame based on a predetermined criteria when an error occurs in the current frame, selecting one of a repetition scheme and an interpolation scheme in the frequency domain as the error concealment scheme for the current frame based on a predetermined criteria when the error concealment in the frequency domain is selected, and concealing the error of the current frame using the selected scheme.

摘要翻译： 一种用于音频信号的错误隐藏方法和装置，以及使用错误隐藏方法和装置的用于音频信号的解码方法和装置。 错误隐藏方法包括：当在当前帧中发生错误时，基于预定标准，选择频域中的错误隐藏和时域中的错误隐藏中的一个作为当前帧的错误隐藏方案，选择 重复方案和在频域中的内插方案作为当前帧的错误隐藏方案，当选择频域中的错误隐藏时，基于预定标准，并且使用所选择的方案来隐藏当前帧的错误。

公开(公告)号：US20080077412A1

公开(公告)日：2008-03-27

申请号：US11902650

申请日：2007-09-24

申请人： Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

发明人： Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/008

摘要： A method, medium, and system encoding and/or decoding an audio signal by extracting stereo parameters from an input signal, encoding the stereo parameters, and performing down-mixing on the input signal to a down-mixed signal, splitting the down-mixed signal into a low band signal and a high band signal, determining whether to encode the low band signal in a time domain or a frequency domain, if the low band signal is determined to be encoded in the time domain, encoding the low band signal in the time domain, if the low band signal is determined to be encoded in the frequency domain, generating an encoded bitplane by converting the low band signal from the time domain to the frequency domain by using a first conversion method and performing quantization and context-dependent encoding on the low band signal converted to the frequency domain by using the first conversion method, converting each of the low band signal and the high band signal from the time domain to the frequency domain or a time/frequency domain by using a second conversion method, generating and encoding bandwidth extension information that represents a characteristic of the high band signal converted by the second conversion method by using the low band signal converted by the second conversion method, and outputting the encoded stereo parameters, the encoded bitplane, and the encoded bandwidth extension information a result of encoding the input signal. Accordingly, high frequency components and stereo components may be efficiently encoded and decoded at a potential restricted bit rate, thereby improving the quality of an audio signal.

摘要翻译： 通过从输入信号中提取立体声参数，对立体声参数进行编码，并对输入信号进行降混以降低混合信号的方法，媒体和/或对音频信号进行编码和/或解码，将下混合 信号转换成低频带信号和高频带信号，如果确定在时域中对低频带信号进行编码，则确定是否在时域或频域编码低频带信号，对低频带信号进行编码 时域，如果低频带信号被确定为在频域中被编码，则通过使用第一转换方法将低频信号从时域转换到频域，并且执行量化和上下文相关性来产生编码的位平面 通过使用第一转换方法对被转换到频域的低频带信号进行编码，将低频带信号和高频带信号从时域转换成频域 或时间/频域，通过使用通过第二转换方法转换的低频带信号，生成和编码表示通过第二转换方法转换的高频带信号的特性的带宽扩展信息，并输出 编码的立体声参数，编码的位平面和编码的带宽扩展信息是对输入信号进行编码的结果。 因此，可以以潜在的限制比特率对高频分量和立体声分量进行有效地编码和解码，从而提高音频信号的质量。

公开(公告)号：US20070299656A1

公开(公告)日：2007-12-27

申请号：US11766331

申请日：2007-06-21

申请人： Chang-yong SON ,  Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

发明人： Chang-yong SON ,  Eun-mi Oh ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC分类号： G10L19/14 ,  G10L21/00

CPC分类号： G10L21/038

摘要： 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.

摘要翻译： 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：US08798172B2

公开(公告)日：2014-08-05

申请号：US11749249

申请日：2007-05-16

申请人： Eun-mi Oh ,  Ho-sang Sung ,  Chang-yong Son ,  Ki-hyun Choo ,  Jung-hoe Kim

发明人： Eun-mi Oh ,  Ho-sang Sung ,  Chang-yong Son ,  Ki-hyun Choo ,  Jung-hoe Kim

IPC分类号： H04N7/12 ,  G06F11/00

CPC分类号： G10L19/005

摘要： 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.

摘要翻译： 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：US08630863B2

公开(公告)日：2014-01-14

申请号：US11872116

申请日：2007-10-15

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

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

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/00 ,  G10L19/025

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08254584B2

公开(公告)日：2012-08-28

申请号：US12107117

申请日：2008-04-22

申请人： Jung-hoe Kim ,  Eun-mi Oh ,  Konstantly Osipov ,  Ki-hyun Choo

发明人： Jung-hoe Kim ,  Eun-mi Oh ,  Konstantly Osipov ,  Ki-hyun Choo

IPC分类号： H04H20/47

CPC分类号： H04H40/36 ,  G10L19/008 ,  H04H20/47 ,  H04H20/88

摘要： 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.

摘要翻译： 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：US08134910B2

公开(公告)日：2012-03-13

申请号：US11935631

申请日：2007-11-06

申请人： Kang-eun Lee ,  Ki-hyun Choo ,  Jung-hoe Kim ,  Eun-mi Oh

发明人： Kang-eun Lee ,  Ki-hyun Choo ,  Jung-hoe Kim ,  Eun-mi Oh

IPC分类号： H04J11/00

CPC分类号： H04N21/4341 ,  H04N21/233 ,  H04N21/236 ,  H04N21/2368 ,  H04N21/434 ,  H04N21/439

摘要： 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.

摘要翻译： 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：US08010348B2

公开(公告)日：2011-08-30

申请号：US11774664

申请日：2007-07-09

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

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

IPC分类号： G10L19/02 ,  G10L19/04 ,  G10L19/08

CPC分类号： G10L19/18 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/09 ,  G10L19/20 ,  G10L25/18

摘要： An adaptive encoding method includes splitting an input signal into a low-frequency band signal and a high-frequency band signal; performing forward adaptive linear prediction on the low-frequency band signal and thus filtering the low-frequency band signal; selectively performing backward adaptive linear prediction or long-term prediction on the filtered low-frequency band signal according to the analysis result of the low-frequency band signal; transforming the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, into a signal in a frequency domain and quantizing the signal; and encoding the high-frequency band signal using the low-frequency band signal, on which backward adaptive linear prediction or long-term prediction has been performed, or the quantized signal. Therefore, compression efficiency of both speech and music signals can be enhanced, and a robust compression method can be provided for various audio contents at a low bit rate.

摘要翻译： 一种自适应编码方法，包括将输入信号分成低频带信号和高频带信号; 对低频带信号执行前向自适应线性预测，从而对低频带信号进行滤波; 根据低频带信号的分析结果，对经滤波的低频带信号选择性地执行反向自适应线性预测或长期预测; 将已经进行了反向自适应线性预测或长期预测的低频带信号变换为频域中的信号并量化信号; 并且使用已经执行了反向自适应线性预测或长期预测的低频带信号或量化信号对高频带信号进行编码。 因此，可以提高语音和音乐信号的压缩效率，并且可以以低比特率为各种音频内容提供鲁棒的压缩方法。