公开(公告)号：US08990075B2

公开(公告)日：2015-03-24

申请号：US13544543

申请日：2012-07-09

申请人： Eun-mi Oh ,  Ki-Hyun Choo ,  Jung-hoo Kim

发明人： Eun-mi Oh ,  Ki-Hyun Choo ,  Jung-hoo Kim

IPC分类号： G10L19/04 ,  G10L21/038 ,  G10L19/20 ,  G10L19/02 ,  G10L19/12

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：US08976970B2

公开(公告)日：2015-03-10

申请号：US13232696

申请日：2011-09-14

申请人： Mi Young Kim ,  Ki Hyun Choo ,  Eun Mi Oh ,  Boris Kudryashov ,  Kirill Yurkov

发明人： Mi Young Kim ,  Ki Hyun Choo ,  Eun Mi Oh ,  Boris Kudryashov ,  Kirill Yurkov

IPC分类号： H04R5/00 ,  G10L19/008 ,  H04S3/00 ,  G10L21/038

CPC分类号： H04S3/008 ,  G10L19/008 ,  G10L21/038 ,  H04S2400/03 ,  H04S2420/03 ,  H04S2420/07

摘要： A method and apparatus of effectively encoding and decoding a high-frequency signal of a multi-channel audio are provided. A multi-channel audio decoding apparatus may down-mix a multi-channel audio input signal, expand a number of channels of the down-mixed signal, select at least one of the expanded channel signal, extract a parameter indicating a characteristic relation between the selected signal and the multi-channel audio input signal, and encode the down-mixed signal and the extracted parameter.

摘要翻译： 提供了一种有效地对多声道音频的高频信号进行编码和解码的方法和装置。 多声道音频解码装置可以对多声道音频输入信号进行降混，扩大下混合信号的频道数，选择扩展频道信号中的至少一个，提取表示 选择信号和多声道音频输入信号，并对下混合信号和提取的参数进行编码。

公开(公告)号：US20140156284A1

公开(公告)日：2014-06-05

申请号：US14123359

申请日：2012-06-01

申请人： Anton Porov ,  Konstantin Osipov ,  Ki-hyun Choo

发明人： Anton Porov ,  Konstantin Osipov ,  Ki-hyun Choo

IPC分类号： G10L19/008

CPC分类号： G10L19/0017 ,  G10L19/002 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/167

摘要： 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.

摘要翻译： 提供了一种音频编码方法。 音频编码方法包括：基于用于音频频谱的预定子带获取信封; 基于预定的子带量化信封; 并且通过使用前一子带的差值作为上下文，获得相邻子带的量化包络之间的差值，并对当前子带的差值进行无损编码。 因此，编码音频频谱的包络信息所需的比特数可以在有限的比特范围内减少，由此增加编码实际频谱分量所需的比特数。

公开(公告)号：US08712782B2

公开(公告)日：2014-04-29

申请号：US11939074

申请日：2007-11-13

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

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

IPC分类号： G10L21/00 ,  G10L19/22 ,  G10L19/00 ,  G10L19/005 ,  G10L19/02 ,  G10L19/18

摘要： A method and apparatus to determine an encoding mode of an audio signal, and a method and apparatus to encode an audio signal according to the encoding mode. In the encoding mode determination method, a mode determination threshold for the current frame that is subject to encoding mode determination is adaptively adjusted according to a long-term feature of the audio signal for a frame (the current frame) that is subject to encoding mode determination, thereby improving the hit rate of encoding mode determination and signal classification, suppressing frequent oscillation of an encoding mode in frame units, improving noise tolerance, and improving smoothness of a reconstructed audio signal.

公开(公告)号：US08625811B2

公开(公告)日：2014-01-07

申请号：US13366455

申请日：2012-02-06

申请人： Ki-hyun Choo ,  Eun-mi Oh ,  Jung-hoe Kim ,  Boris Kudryashov ,  Sergey Petrov

发明人： Ki-hyun Choo ,  Eun-mi Oh ,  Jung-hoe Kim ,  Boris Kudryashov ,  Sergey Petrov

IPC分类号： H04R5/00

CPC分类号： G10L19/008 ,  H04H20/88 ,  H04H20/89 ,  H04S3/00 ,  H04S2420/03

摘要： Provided are a method and apparatus for encoding and decoding a stereo signal or a multi-channel signal. According to the method and apparatus, a stereo signal or a multi-channel signal can be encoded and/or decoded by generating parameters based on a mono signal.

摘要翻译： 提供了一种用于对立体声信号或多声道信号进行编码和解码的方法和装置。 根据该方法和装置，可以通过基于单声道信号产生参数来对立体声信号或多声道信号进行编码和/或解码。

公开(公告)号：US08340962B2

公开(公告)日：2012-12-25

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： G10L19/12

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：US08219393B2

公开(公告)日：2012-07-10

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： G10L21/00

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：US20120170595A1

公开(公告)日：2012-07-05

申请号：US13417419

申请日：2012-03-12

申请人： Kang-eun LEE ,  Ki-hyun Choo ,  Jung-hoo Kim ,  Eun-mi Oh

发明人： Kang-eun LEE ,  Ki-hyun Choo ,  Jung-hoo Kim ,  Eun-mi Oh

IPC分类号： H04J3/22

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：US20120116757A1

公开(公告)日：2012-05-10

申请号：US13354749

申请日：2012-01-20

申请人： Ki-hyun CHOO ,  Lei Miao ,  Eun-mi Oh

发明人： Ki-hyun CHOO ,  Lei Miao ,  Eun-mi Oh

IPC分类号： G10L19/00

CPC分类号： G10L19/06 ,  G10L19/02 ,  G10L19/0208 ,  G10L19/04 ,  G10L19/07 ,  G10L19/167 ,  G10L21/038 ,  G10L25/12 ,  G10L25/21 ,  G10L25/90

摘要： Provided are a method and apparatus for encoding and decoding a high frequency signal by using a low frequency signal. The high frequency signal can be encoded by extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient, generating a signal by using the extracted coefficient and a low frequency signal, and encoding the high frequency signal by calculating a ratio between the high frequency signal and an energy value of the generated signal. Also, the high frequency signal can be decoded by decoding a coefficient, which is extracted by linear predicting a high frequency signal, and a low frequency signal, and generating a signal by using the decoded coefficient and the decoded low frequency signal, and adjusting the generated signal by decoding a ratio between the generated signal and an energy value of the high frequency signal.

摘要翻译： 提供了一种通过使用低频信号对高频信号进行编码和解码的方法和装置。 高频信号可以通过线性预测高频信号提取系数进行编码，并对该系数进行编码，通过使用提取的系数和低频信号产生信号，并通过计算高频信号之间的比率来对高频信号进行编码 高频信号和产生的信号的能量值。 此外，可以通过对通过线性预测高频信号提取的系数和低频信号进行解码来解码高频信号，并且通过使用解码的系数和解码的低频信号来生成信号，并且调整 通过解码所生成的信号与高频信号的能量值之间的比率来产生信号。

公开(公告)号：US20120010891A1

公开(公告)日：2012-01-12

申请号：US13126947

申请日：2009-10-28

申请人： Jung Hoe Kim ,  Eunmi Oh ,  Mi Young Kim ,  Ki Hyun Choo

发明人： Jung Hoe Kim ,  Eunmi Oh ,  Mi Young Kim ,  Ki Hyun Choo

IPC分类号： G10L19/00

CPC分类号： G10L19/008

摘要： An apparatus and method for encoding/decoding a multi-channel signal may be provided. The apparatus of encoding a multi-channel signal may insert information about whether to encode a phase parameter indicating phase information of a plurality of channels, included in the multi-channel signal, in a bitstream of the multi-channel signal. The apparatus of decoding a multi-channel signal may determine whether to up-mix a mono signal using the phase parameter based on the information about whether to encode.