公开(公告)号：US20130156206A1

公开(公告)日：2013-06-20

申请号：US13505443

申请日：2011-09-06

申请人： Minoru Tsuji ,  Toru Chinen

发明人： Minoru Tsuji ,  Toru Chinen

IPC分类号： H03G1/00

CPC分类号： H03G1/0005 ,  H03G1/00 ,  H03G7/002 ,  H03G7/007 ,  H04R2430/01

摘要： The present invention relates to a signal processing apparatus and method, a program, and a data recording medium configured such that the playback level of an audio signal can be easily and effectively enhanced without requiring prior analysis.An analyzer 21 generates mapping control information in the form of the root mean square of samples in a given segment of a supplied audio signal. A mapping processor 22 takes a nonlinear function determined by the mapping control information taken as a mapping function, and conducts amplitude conversion on a supplied audio signal using the mapping function. In this way, by conducting amplitude conversion of an audio signal using a nonlinear function that changes according to the characteristics in respective segments of an audio signal, the playback level of an audio signal can be easily and effectively enhanced without requiring prior analysis. The present invention may be applied to portable playback apparatus.

公开(公告)号：US20130028427A1

公开(公告)日：2013-01-31

申请号：US13639325

申请日：2011-04-11

申请人： Yuki Yamamoto ,  Toru Chinen ,  Hiroyuki Honma ,  Yuhki Mitsufuji

发明人： Yuki Yamamoto ,  Toru Chinen ,  Hiroyuki Honma ,  Yuhki Mitsufuji

IPC分类号： H04R5/00

CPC分类号： G10L21/0388 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/167 ,  G10L21/038

摘要： The present invention relates to a signal processing apparatus and a signal processing method, an encoder and an encoding method, a decoder and a decoding method, and a program capable of reproducing music signal having a better sound quality by expansion of frequency band.An encoder sets an interval including 16 frames as interval section to be processed, outputs high band encoded data for obtaining the high band component of an input signal and low band encoded data obtained by encoding the low band signal of the input signal for each section to be processed. In this case, for each frame, a coefficient used in estimation of the high band component is selected and the section to be processed is divided into continuous frame segments including continuous frames from which the coefficient with the same section to be processed is selected. In addition, high band encoded data is produced which includes data including information indicating a length of each continuous frame segment, information indicating the number of continuous frame segments included in the section to be processed and a coefficient index indicating the coefficient selected in each continuous frame segment. The present invention is applicable to the encoder.

摘要翻译： 本发明涉及一种信号处理装置和信号处理方法，编码器和编码方法，解码器和解码方法，以及能够通过扩展频带来再现具有更好音质的音乐信号的程序。 编码器将包括16帧的间隔设置为要处理的间隔部分，输出用于获得输入信号的高频带分量的高频带编码数据和通过将每个部分的输入信号的低频带信号编码而获得的低频带编码数据 被处理。 在这种情况下，对于每个帧，选择在高频分量的估计中使用的系数，并且将要处理的部分划分成包括连续帧的连续帧段，从中选择具有相同部分的系数的连续帧。 此外，产生高频带编码数据，其包括包括指示每个连续帧段的长度的信息的数据，指示包括在待处理区段中的连续帧段的数量的信息和指示在每个连续帧中选择的系数的系数索引 分割。 本发明可应用于编码器。

公开(公告)号：US08340213B2

公开(公告)日：2012-12-25

申请号：US13399103

申请日：2012-02-17

申请人： Toru Chinen ,  Hiroyuki Honma

发明人： Toru Chinen ,  Hiroyuki Honma

IPC分类号： H04L27/00

CPC分类号： H04L27/00 ,  G10L19/0204

摘要： An encoding apparatus that divides an input time series signal into a plurality of sub-bands and encodes a low frequency sub-band signal to generate encoded data of the low frequency sub-band signal. Concurrently, it compares the frequency amplitude peak of the new high frequency sub-band signal generated from the low frequency sub-band signal and the original high frequency sub-band signal and generates frequency amplitude peak information of the high frequency sub-band signal. It compares the gain of the new high frequency sub-band signal generated by using the low frequency sub-band signal and the original high frequency sub-band signal and generates gain information of the high frequency sub-band signal. Subsequently, the signal encoding apparatus multiplexes the encoded data of the low frequency sub-band signal, the frequency amplitude peak information of the high frequency sub-band signal and the gain information of the high frequency sub-band signal and outputs compressed data.

摘要翻译： 一种编码装置，其将输入的时间序列信号分割为多个子带，并对低频子带信号进行编码，以生成低频子带信号的编码数据。 同时，比较从低频子带信号和原始高频子带信号产生的新的高频子带信号的频率幅度峰值，并生成高频子带信号的频率幅度峰值信息。 它比较通过使用低频子带信号和原始高频子带信号产生的新的高频子带信号的增益，并产生高频子带信号的增益信息。 随后，信号编码装置将低频子带信号的编码数据，高频子带信号的频率振幅峰值信息和高频子带信号的增益信息进行复用，并输出压缩数据。

公开(公告)号：US08126162B2

公开(公告)日：2012-02-28

申请号：US11752868

申请日：2007-05-23

申请人： Chunmao Zhang ,  Toru Chinen

发明人： Chunmao Zhang ,  Toru Chinen

IPC分类号： H04B15/00

CPC分类号： G10L21/04 ,  G10L19/005 ,  G10L25/90 ,  H04R3/04

摘要： An audio signal interpolation apparatus is configured to perform interpolation processing on the basis of audio signals preceding and/or following a predetermined segment on a time axis so as to obtain an audio signal corresponding to the predetermined segment. The audio signal interpolation apparatus includes a waveform formation unit configured to form a waveform for the predetermined segment on the basis of time-domain samples of the preceding and/or the following audio signals and a power control unit configured to control power of the waveform for the predetermined segment formed by the waveform formation unit using a non-linear model selected on the basis of the preceding audio signal when the power of the preceding audio signal is larger than that of the following audio signal, or the following audio signal when the power of the preceding audio signal is smaller than that of the following audio signal.

摘要翻译： 音频信号插值装置被配置为基于在时间轴上的预定段之前和/或之后的音频信号执行内插处理，以便获得对应于预定段的音频信号。 音频信号插入装置包括：波形形成单元，被配置为基于先前和/或后续音频信号的时域采样形成用于预定段的波形;以及功率控制单元，被配置为控制波形的功率 当前一音频信号的功率大于下一个音频信号的功率时，由波形形成单元使用基于先前音频信号选择的非线性模型形成的预定分段，或当下一个音频信号 的音频信号小于以下音频信号。

公开(公告)号：US20080056511A1

公开(公告)日：2008-03-06

申请号：US11752868

申请日：2007-05-23

申请人： Chunmao Zhang ,  Toru Chinen

发明人： Chunmao Zhang ,  Toru Chinen

IPC分类号： H04B15/00

CPC分类号： G10L21/04 ,  G10L19/005 ,  G10L25/90 ,  H04R3/04

摘要： An audio signal interpolation apparatus is configured to perform interpolation processing on the basis of audio signals preceding and/or following a predetermined segment on a time axis so as to obtain an audio signal corresponding to the predetermined segment. The audio signal interpolation apparatus includes a waveform formation unit configured to form a waveform for the predetermined segment on the basis of time-domain samples of the preceding and/or the following audio signals and a power control unit configured to control power of the waveform for the predetermined segment formed by the waveform formation unit using a non-linear model selected on the basis of the preceding audio signal when the power of the preceding audio signal is larger than that of the following audio signal, or the following audio signal when the power of the preceding audio signal is smaller than that of the following audio signal.

摘要翻译： 音频信号插值装置被配置为基于在时间轴上的预定段之前和/或之后的音频信号执行内插处理，以便获得对应于预定段的音频信号。 音频信号插入装置包括：波形形成单元，被配置为基于先前和/或后续音频信号的时域采样形成用于预定段的波形;以及功率控制单元，被配置为控制波形的功率 当前一音频信号的功率大于下一个音频信号的功率时，由波形形成单元使用基于先前音频信号选择的非线性模型形成的预定分段，或当下一个音频信号 的音频信号小于以下音频信号。

公开(公告)号：US09406306B2

公开(公告)日：2016-08-02

申请号：US13498234

申请日：2011-07-27

申请人： Yuki Yamamoto ,  Toru Chinen ,  Mitsuyuki Hatanaka

发明人： Yuki Yamamoto ,  Toru Chinen ,  Mitsuyuki Hatanaka

IPC分类号： G10L19/02 ,  G10L21/038

CPC分类号： G10L19/02 ,  G10L19/26 ,  G10L21/038

摘要： A method, system, and computer program product for processing an encoded audio signal is described. In one exemplary embodiment, the system receives an encoded low-frequency range signal and encoded energy information used to frequency shift the encoded low-frequency range signal. The low-frequency range signal is decoded and an energy depression of the decoded signal is smoothed. The smoothed low-frequency range signal is frequency shifted to generate a high-frequency range signal. The low-frequency range signal and high-frequency range signal are then combined and outputted.

摘要翻译： 描述了用于处理编码音频信号的方法，系统和计算机程序产品。 在一个示例性实施例中，系统接收编码的低频范围信号和用于对编码的低频范围信号进行频移的编码能量信息。 低频范围信号被解码，解码信号的能量下降被平滑化。 平滑的低频范围信号被频移以产生高频范围信号。 然后组合并输出低频范围信号和高频范围信号。

公开(公告)号：US09390717B2

公开(公告)日：2016-07-12

申请号：US14237933

申请日：2012-08-14

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/22 ,  G10L21/038

CPC分类号： G10L19/008 ,  G10L19/0208 ,  G10L19/22 ,  G10L21/038

摘要： The present technology relates to an encoding device and method, a decoding device and method, and a program that enable audio of a high audio quality to be obtained with a smaller code amount.The encoding device multiplexes low frequency encoding data obtained by encoding a low frequency component of an input signal and high frequency encoding data obtained by encoding data including an estimation coefficient to acquire a high frequency component of the input signal by estimation and outputs multiplexed data. When the input signal is encoded, a calculation unit calculates pseudo high frequency subband power to be an estimation value of power of the high frequency component from an estimation coefficient selected in a frame immediately before a frame of a processing target and the high frequency component of the input signal. In addition, a determination unit determines whether reuse of the estimation coefficient of the immediately previous frame is enabled in the frame of the processing target, on the basis of a comparison result of the calculated pseudo high frequency subband power and actual high frequency component power. The present invention can be applied to the encoding device.

摘要翻译： 本技术涉及编码装置和方法，解码装置和方法以及以较小代码量获得高音频质量的音频的程序。 编码装置对通过对输入信号的低频分量进行编码而获得的低频编码数据和通过对包含估计系数进行编码的数据而获得的高频编码数据进行复用，从而通过推定获取输入信号的高频分量，并输出复用数据。 当输入信号被编码时，计算单元将伪高频子带功率从紧邻处理目标的帧之前的帧中选择的估计系数和高频分量的高频分量计算为高频分量的功率估计值 输入信号。 此外，确定单元基于所计算的伪高频子带功率和实际高频分量功率的比较结果，确定在处理对象的帧中是否启用了紧前一帧的估计系数的再利用。 本发明可以应用于编码装置。

公开(公告)号：US09177563B2

公开(公告)日：2015-11-03

申请号：US13877192

申请日：2011-10-05

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/008 ,  G10L19/02 ,  G10L21/0388 ,  G10L25/18 ,  G10L25/21

CPC分类号： G10L21/0388 ,  G10L19/008 ,  G10L19/0208 ,  G10L25/18 ,  G10L25/21

摘要： The present invention relates to an encoding device and method, and a decoding device and method, and a program which enable music signals to be played with higher sound quality by expanding a frequency band.A band pass filter divides an input signal into multiple subband signals, a feature amount calculating circuit calculates feature amount using at least any one of the divided multiple subband signals and the input signal, a high-frequency subband power estimating circuit calculates an estimated value of high-frequency subband power based on the calculated feature amount, and a high-frequency signal generating circuit generates a high-frequency signal component based on the multiple subband signals divided by the band pass filter and the estimated value of the high-frequency subband power calculated by the high-frequency subband power estimating circuit. A frequency band expanding device expands the frequency band of the input signal using the high-frequency signal component generated by the high-frequency signal generating circuit. The present invention may be applied to a frequency band expanding device, encoding device, decoding device, and so forth, for example.

摘要翻译： 本发明涉及一种编码装置和方法，以及解码装置和方法以及通过扩展频带使音乐信号以更高音质播放的程序。 带通滤波器将输入信号划分成多个子带信号，特征量计算电路使用划分的多个子带信号和输入信号中的至少一个来计算特征量，高频子带功率估计电路计算估计值 基于计算出的特征量的高频子带功率，高频信号生成电路基于由带通滤波器分割的多个子带信号和高频子带功率的估计值，生成高频信号成分 由高频子带功率估计电路计算出。 频带扩展装置使用由高频信号发生电路产生的高频信号分量来扩展输入信号的频带。 例如，本发明可以应用于频带扩展装置，编码装置，解码装置等。

公开(公告)号：US20140172433A2

公开(公告)日：2014-06-19

申请号：US14006148

申请日：2012-03-23

申请人： Hiroyuki Honma ,  Toru Chinen ,  Yuki Yamamoto ,  Mitsuyuki Hatanaka

发明人： Hiroyuki Honma ,  Toru Chinen ,  Yuki Yamamoto ,  Mitsuyuki Hatanaka

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/24

摘要： This technology relates to an encoding device, an encoding method, and a program capable of improving audio quality and more efficiently encoding audio. A first high-frequency encoding circuit encodes a high-frequency range based on a low-frequency subband signal and a high-frequency subband signal and obtains a high-frequency code amount. A low-frequency encoding circuit encodes a low-frequency signal with a code amount determined by the high-frequency code amount and a low-frequency decoding circuit decodes the encoded low-frequency signal. A subband dividing circuit divides a decoded low-frequency signal obtained by decoding into decoded low-frequency subband signals of a plurality of subbands and a second high-frequency encoding circuit generates a high-frequency code string such that a code amount of the high-frequency code string for obtaining a high-frequency component is not larger than the high-frequency code amount based on the decoded low-frequency subband signals and the high-frequency subband signals. The present invention is applicable to the encoding device.

摘要翻译： 该技术涉及能够改善音频质量并且更有效地编码音频的编码装置，编码方法和程序。 第一高频编码电路基于低频子带信号和高频子带信号对高频范围进行编码，并获得高频码量。 低频编码电路以由高频码量确定的码量对低频信号进行编码，低频解码电路解码编码的低频信号。 子带分割电路将通过解码获得的解码低频信号划分为多个子带的解码低频子带信号，第二高频编码电路生成高频编码串， 基于解码的低频子带信号和高频子带信号，用于获得高频分量的频率码串不大于高频编码量。 本发明可应用于编码装置。

公开(公告)号：US20130030818A1

公开(公告)日：2013-01-31

申请号：US13639338

申请日：2011-04-11

申请人： Yuki Yamamoto ,  Toru Chinen ,  Hiroyuki Honma ,  Yuhki Mitsufuji

发明人： Yuki Yamamoto ,  Toru Chinen ,  Hiroyuki Honma ,  Yuhki Mitsufuji

IPC分类号： G10L21/00

CPC分类号： G10L21/0205 ,  G10L19/0204 ,  G10L19/167 ,  G10L21/0388 ,  G10L25/18

摘要： The present invention relates to a signal processing apparatus and a signal processing method, an encoder and an encoding method, a decoder and a decoding method, and a program capable of reproducing music signal having a better sound quality by expansion of frequency band.A high band decoding circuit decodes high band encoded data outputs a coefficient table having coefficients for the respective high band sub-bands, which are specified by a coefficient index obtained as a result of decoding. A decoding high band sub-band power calculation circuit calculates decoded high band sub-band powers for the respective high band sub-bands based on low band signals and the coefficient table, and a decoded high band signal production unit produces decoded high band signals from these decoded high band sub-band powers. At this time, an extension and reduction unit newly produces or deletes coefficients of the coefficient table for the respective sub-bands to correspond to the number of sub-bands of the calculated decoded high band sub-band powers, thereby to extend or reduce the coefficient table. The present invention can be applied to a decoder.