公开(公告)号：US20090228284A1

公开(公告)日：2009-09-10

申请号：US12397505

申请日：2009-03-04

Applicant: Han-gil MOON ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

Inventor： Han-gil MOON ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

IPC: G10L19/00

CPC classification number: G10L19/035

Abstract: A method and apparatus for encoding a multi-channel audio signal is provided. The method includes the operations of selecting a first variable length code table (VLC) that is to be used to encode the multi-channel audio signal in a given frequency band, from among a plurality of VLC tables, and encoding the multi-channel audio signal by using the first VLC table. Thus, the multi-channel audio signal can be encoded by using VLC tables that differ according to frequency bands.

Abstract translation: 提供了一种用于对多声道音频信号进行编码的方法和装置。 该方法包括从多个VLC表中选择要用于对给定频带中的多声道音频信号进行编码的第一可变长度码表（VLC）和对多声道音频进行编码的操作 信号通过使用第一个VLC表。 因此，可以通过使用根据频带而不同的VLC表来编码多声道音频信号。

公开(公告)号：US20090198489A1

公开(公告)日：2009-08-06

申请号：US12363937

申请日：2009-02-02

Applicant: Nam-suk LEE ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Han-gil Moon

Inventor： Nam-suk LEE ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Han-gil Moon

IPC: G10L19/00

CPC classification number: G10L19/093

Abstract: Provided are a method and apparatus for encoding the frequency of a continuation sinusoidal signal and a method and apparatus for decoding the same. In the encoding method, a continuation sinusoidal signal successive to a sinusoidal signal in a previous section is extracted from a current section; a frequency of the continuation sinusoidal signal at the boundary between the current and previous sections is changed to a first frequency, based on representative frequencies of the continuation sinusoidal signal and at least one sinusoidal signal that belongs to a section adjacent to the current section and is successive to the continuation sinusoidal signal; and the first frequency is encoded.

Abstract translation: 提供一种用于对连续正弦信号的频率进行编码的方法和装置，以及用于对其进行解码的方法和装置。 在编码方法中，从当前部分提取与前一部分中的正弦信号连续的连续正弦信号; 基于连续正弦信号的代表频率和属于与当前部分相邻的部分的至少一个正弦信号，在当前部分和前一部分之间的边界处的连续正弦信号的频率被改变为第一频率，并且是 连续的正弦信号; 并且第一频率被编码。

公开(公告)号：US20090048826A1

公开(公告)日：2009-02-19

申请号：US12131446

申请日：2008-06-02

Applicant: Nam-suk LEE ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Han-gil MOON

Inventor： Nam-suk LEE ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Han-gil MOON

IPC: G10L19/00

CPC classification number: G10L19/093

Abstract: Provided are an encoding method and apparatus for efficiently encoding a sinusoidal signal whose magnitude is less than a masking value according to a psychoacoustic model, a decoding method and apparatus for decoding an encoded sinusoidal signal, and a computer-readable recording medium having recorded thereon a program for executing the encoding method/the decoding method. By using a particular code indicating that the magnitude of a first sinusoidal signal is less than a masking value according to a psychoacoustic model to encode the first sinusoidal signal, difference coding for a third sinusoidal signal of a next frame, which is connected to the first sinusoidal signal, is performed using a sinusoidal signal or sinusoidal signals selected according to a method to use the particular code, and a decoding apparatus obtains a sum with a transmitted difference using the selected sinusoidal signal(s).

Abstract translation: 提供了一种编码方法和装置，用于根据心理声学模型有效地编码其幅度小于掩蔽值的正弦信号，用于对编码的正弦信号进行解码的解码方法和装置，以及在其上记录有编码的正弦信号的计算机可读记录介质 用于执行编码方法/解码方法的程序。 通过使用指示第一正弦信号的幅度小于根据心理声学模型编码第一正弦信号的屏蔽值的特定码，对于连接到第一正弦信号的下一帧的第三正弦信号的差编码 使用根据使用特定码的方法选择的正弦信号或正弦信号来执行正弦信号，并且解码装置使用所选择的正弦信号来获得具有发送差的和。

公开(公告)号：US20080189119A1

公开(公告)日：2008-08-07

申请号：US12026733

申请日：2008-02-06

Applicant: Jae-one OH ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

Inventor： Jae-one OH ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

IPC: G10L19/00

CPC classification number: G10L19/26 ,  G10L19/0204 ,  G10L21/0364 ,  H03G5/005

Abstract: A method of implementing an equalizer in an audio signal decoder and an apparatus therefor are provided. According to the method and apparatus, a signal output from an audio signal decoder is not processed by an equalizer, but the values of frequency components are adjusted according to a user's input before subband sample data is transformed into a frequency domain signal in an audio signal decoder, thereby implementing an equalizer in a codec. In this way, the complexity of implementing an apparatus for reproducing an audio signal can be reduced and delay of an equalizer can be reduced.

Abstract translation: 提供了一种在音频信号解码器及其装置中实现均衡器的方法。 根据该方法和装置，由音频信号解码器输出的信号不由均衡器处理，但是在将子带采样数据变换成音频信号中的频域信号之前，根据用户的输入来调整频率分量的值 解码器，从而在编解码器中实现均衡器。 以这种方式，可以减少实现用于再现音频信号的装置的复杂性，并且可以减小均衡器的延迟。

公开(公告)号：US20080189118A1

公开(公告)日：2008-08-07

申请号：US12024381

申请日：2008-02-01

Applicant: Geon-hyoung LEE ,  Jae-one Oh ,  Chul-woo Lee ,  Jong-hoon Jeong ,  Nam-suk Lee

Inventor： Geon-hyoung LEE ,  Jae-one Oh ,  Chul-woo Lee ,  Jong-hoon Jeong ,  Nam-suk Lee

IPC: G10L19/00

CPC classification number: G10L19/0212 ,  G10L19/022

Abstract: An audio encoding and decoding apparatus and a method thereof, capable of improving compression efficiency, by using coefficients that are stable over a period of time and in a range of frequency bands, are provided. The audio encoding method divides an input audio signal into frames having lengths different from each other; obtaining at least one magnitude in relation to each of the frames having different lengths; and encoding the magnitude. The audio decoding method separates at least one encoded magnitude in relation to each of frames having different lengths, based on the frame length; decoding each of the separated encoded magnitudes; and restoring an audio signal by using the decoded magnitude.

Abstract translation: 提供一种能够通过使用在一段时间内和频带范围内稳定的系数来提高压缩效率的音频编码和解码装置及其方法。 音频编码方法将输入音频信号分成具有彼此不同长度的帧; 相对于具有不同长度的每个帧获得至少一个幅度; 并编码大小。 音频解码方法基于帧长度分离与每个具有不同长度的帧相关联的编码幅度; 解码每个分离的编码幅度; 并通过使用解码的幅度恢复音频信号。

公开(公告)号：US20080162149A1

公开(公告)日：2008-07-03

申请号：US11954286

申请日：2007-12-12

Applicant: Geon-hyoung LEE ,  Jae-one OH ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

Inventor： Geon-hyoung LEE ,  Jae-one OH ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE

IPC: G10L21/04

CPC classification number: G10L19/093 ,  G10L19/0212

Abstract: Provided are audio encoding and decoding apparatuses capable of recovering a high-quality audio signal at a low bit rate. The audio encoding method includes: detecting at least one sinusoidal wave from an input audio signal; calculating components of additional basis vectors based on residual audio signals and the additional basis vectors of the sinusoidal wave; determining transmission of components of the additional basis vectors; and at least one of (a) encoding frequencies and (b) phases and amplitudes of the sinusoidal waves when the transmission of the components of the additional basis vectors are determined, wherein the residual audio signals are obtained by excluding the detected sinusoidal waves from the input audio signal.

Abstract translation: 提供能够以低比特率恢复高质量音频信号的音频编码和解码装置。 该音频编码方法包括：从输入音频信号中检测至少一个正弦波; 基于剩余音频信号和正弦波的附加基矢量来计算附加基矢量的分量; 确定附加基本向量的分量的传输; 并且当确定附加基矢量的分量的传输时，（a）编码频率和（b）正弦波的相位和振幅中的至少一个，其中残留音频信号是通过将检测到的正弦波从 输入音频信号。

公开(公告)号：US20090198501A1

公开(公告)日：2009-08-06

申请号：US12361940

申请日：2009-01-29

Applicant: Jong-hoon JEONG ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Nam-suk LEE ,  Han-gil MOON

Inventor： Jong-hoon JEONG ,  Geon-hyoung LEE ,  Chul-woo LEE ,  Nam-suk LEE ,  Han-gil MOON

IPC: G10L21/00

CPC classification number: G10L19/025 ,  G10L19/04

Abstract: Provided are a method and apparatus for encoding or decoding an audio signal by adaptively interpolating a linear predictive coding (LPC) coefficient. In the method and apparatus of encoding or decoding an audio signal, LPC coefficient interpolation is selectively performed depending on whether a transient section is present in a current frame, thereby preventing noise from occurring when interpolating LPC coefficients in the transient section.

Abstract translation: 提供了一种通过自适应地内插线性预测编码（LPC）系数来对音频信号进行编码或解码的方法和装置。 在对音频信号进行编码或解码的方法和装置中，根据在当前帧中是否存在瞬态部分来选择性地执行LPC系数内插，从而防止在对瞬态部分内插LPC系数时产生噪声。

公开(公告)号：US20080235034A1

公开(公告)日：2008-09-25

申请号：US12022581

申请日：2008-01-30

Applicant: Nam-suk LEE ,  Geon-hyoung LEE ,  Jae-one OH ,  Chul-woo LEE ,  Jong-hoon JEONG

Inventor： Nam-suk LEE ,  Geon-hyoung LEE ,  Jae-one OH ,  Chul-woo LEE ,  Jong-hoon JEONG

IPC: G10L19/00

CPC classification number: G10L19/093

Abstract: Provided are a method and apparatus for encoding an audio signal to efficiently encode a harmonic envelope and a method and apparatus for decoding an audio signal to decode the harmonic envelope. The method of encoding an audio signal includes performing harmonic analysis with respect to an input signal to determine harmonic parameters with respect to harmonic signals; regarding amplitudes of the harmonic signals included in the harmonic parameters as signals in the time domain so as to perform time-frequency transformation; and encoding the time-frequency transformed values. When expressing a harmonic envelope, the amplitudes of the harmonic signals are regarded as signals in the time domain so as to perform a time-frequency transformation and only a part from among the transformed values is selected to be encoded. Therefore, sound quality is not affected and coding efficiency greatly improves.

Abstract translation: 提供了一种用于对音频信号进行编码以有效地编码谐波包络的方法和装置，以及用于对音频信号进行解码以解码谐波包络的方法和装置。 对音频信号进行编码的方法包括对输入信号执行谐波分析以确定相对于谐波信号的谐波参数; 将包括在谐波参数中的谐波信号的幅度作为时域中的信号进行时频转换; 并对时间 - 频率变换的值进行编码。 当表示谐波包络时，谐波信号的幅度被认为是时域中的信号，以便执行时间 - 频率变换，并且仅选择变换值中的一部分进行编码。 因此，音质不受影响，编码效率大大提高。

公开(公告)号：US20090192792A1

公开(公告)日：2009-07-30

申请号：US12361999

申请日：2009-01-29

Applicant: Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE ,  Han-gil MOON

Inventor： Geon-hyoung LEE ,  Chul-woo LEE ,  Jong-hoon JEONG ,  Nam-suk LEE ,  Han-gil MOON

IPC: G10L19/00

CPC classification number: G10L19/083

Abstract: Provided are methods and apparatuses for more efficiently encoding and decoding a high frequency band signal which is from an audio signal and which is greater than a predetermined threshold frequency. The method and apparatus for encoding the audio signal encodes a linear prediction coding (LPC) coefficient and gain information of a residual signal, which are generated by performing LPC analysis, thereby encoding a high frequency signal so as to have enhanced sound quality, while using less bits.

Abstract translation: 提供了用于更有效地编码和解码来自音频信号并且大于预定阈值频率的高频带信号的方法和装置。 用于对音频信号进行编码的方法和装置对通过执行LPC分析而产生的残差信号的线性预测编码（LPC）系数和增益信息进行编码，从而对高频信号进行编码以便具有增强的声音质量，同时使用 少位

公开(公告)号：US20090192789A1

公开(公告)日：2009-07-30

申请号：US12362060

申请日：2009-01-29

Applicant: Geon-hyoung LEE ,  Chul-woo Lee ,  Jong-hoon Jeong ,  Nam-suk Lee ,  Han-gil Moon

Inventor： Geon-hyoung LEE ,  Chul-woo Lee ,  Jong-hoon Jeong ,  Nam-suk Lee ,  Han-gil Moon

IPC: G10L11/04 ,  G10L19/04

CPC classification number: G10L19/0204 ,  G10L19/093

Abstract: Provided are a method and apparatus for effectively encoding/decoding remaining difference signals excluding sinusoidal components, from input audio signals. In the method and apparatus for encoding audio signals, sinusoidal analysis is performed on low frequency signals of less than a predetermined critical frequency in order to extract sinusoidal signals and then, an encoding operation is performed on the remaining difference signals excluding the sinusoidal signals, from input audio signals, by using linear prediction coding (LPC) analysis.

Abstract translation: 提供了一种用于从输入音频信号有效地编码/解码除了正弦分量的剩余差分信号的方法和装置。 在用于编码音频信号的方法和装置中，对小于预定临界频率的低频信号执行正弦分析，以便提取正弦信号，然后对不包括正弦信号的剩余差信号执行编码操作， 输入音频信号，通过使用线性预测编码（LPC）分析。