公开(公告)号：US09208795B2

公开(公告)日：2015-12-08

申请号：US13499559

申请日：2010-09-29

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： H04J1/00 ,  G10L21/038 ,  G10L19/02

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

摘要： The present invention relates to a frequency band extending device and method, an encoding device and method, a decoding device and method, and a program, whereby music signals can be played with higher sound quality due to the extension of frequency bands.A bandpass filter 13 divides an input signal into multiple sub-band signals, a feature amount calculating circuit 14 calculates feature amount using at least one of the multiple divided sub-band signals and the input signal, a high frequency sub-band power estimating circuit 15 calculates an estimated value of a high frequency sub-band power based on the calculated feature amount, a high frequency signal generating circuit 16 generates a high frequency signal component based on the multiple sub-band signals divided by the bandpass filter 13, and the estimated value of the high frequency sub-band power calculated by the high frequency sub-band power estimating circuit 15. A frequency band extending device 10 extends the frequency band of the input signal using a high frequency signal component. The present invention may be applied to a frequency band extending device, for example.

摘要翻译： 本发明涉及一种频带扩展装置及方法，编码装置和方法，解码装置和方法以及程序，由此可以由于频带的扩展而以更高的音质播放音乐信号。 带通滤波器13将输入信号分割为多个子带信号，特征量计算电路14使用多个分频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 基于计算出的特征量计算高频子带功率的估计值，高频信号生成电路16基于由带通滤波器13分割的多个子带信号生成高频信号分量， 由高频子带功率估计电路15计算的高频子带功率的估计值。频带扩展装置10使用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。

公开(公告)号：US20140205101A1

公开(公告)日：2014-07-24

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

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：US20130202118A1

公开(公告)日：2013-08-08

申请号：US13640500

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： G10L19/008

CPC分类号： G10L19/008 ,  G10L19/0204 ,  G10L19/167 ,  G10L21/0388

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 sampling frequency conversion unit converts a sampling frequency of an input signal, and a sub-band division circuit divides the input signal after the sampling conversion into sub-band signals of sub-bands having the number corresponding to the sampling frequency.A pseudo high band sub-band power calculation circuit calculates pseudo high band sub-band powers based on low band signals of the input signal and coefficient tables having coefficients for the respective high band sub-bands. A pseudo high band sub-band power difference calculation circuit compares high band sub-band powers and the pseudo high band sub-band powers to each other and selects a coefficient table from plural coefficient tables. In addition, a coefficient index which specifies the coefficient table is encoded and set as high band encoded data. The present invention can be applied to an 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。 采样频率转换单元转换输入信号的采样频率，子带分割电路将采样转换后的输入信号分成具有对应于采样频率的数字的子带的子带信号。 伪高带子带功率计算电路基于输入信号的低频带信号和具有各高频子带的系数的系数表来计算伪高频子带功率。 伪高带子带功率差计算电路将高频带子带功率和伪高频带子频带功率进行比较，并从多个系数表中选择系数表。 此外，指定系数表的系数索引被编码并设置为高频带编码数据。 本发明可以应用于编码器。

公开(公告)号：US20120243526A1

公开(公告)日：2012-09-27

申请号：US13499559

申请日：2010-09-29

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： H04W4/00

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

摘要： The present invention relates to a frequency band extending device and method, an encoding device and method, a decoding device and method, and a program, whereby music signals can be played with higher sound quality due to the extension of frequency bands.A bandpass filter 13 divides an input signal into multiple sub-band signals, a feature amount calculating circuit 14 calculates feature amount using at least one of the multiple divided sub-band signals and the input signal, a high frequency sub-band power estimating circuit 15 calculates an estimated value of a high frequency sub-band power based on the calculated feature amount, a high frequency signal generating circuit 16 generates a high frequency signal component based on the multiple sub-band signals divided by the bandpass filter 13, and the estimated value of the high frequency sub-band power calculated by the high frequency sub-band power estimating circuit 15. A frequency band extending device 10 extends the frequency band of the input signal using a high frequency signal component. The present invention may be applied to a frequency band extending device, for example.

摘要翻译： 本发明涉及一种频带扩展装置及方法，编码装置和方法，解码装置和方法以及程序，由此可以由于频带的扩展而以更高的音质播放音乐信号。 带通滤波器13将输入信号分割为多个子带信号，特征量计算电路14使用多个分频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 基于计算出的特征量计算高频子带功率的估计值，高频信号生成电路16基于由带通滤波器13分割的多个子带信号生成高频信号分量， 由高频子带功率估计电路15计算的高频子带功率的估计值。频带扩展装置10使用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。

公开(公告)号：US09842603B2

公开(公告)日：2017-12-12

申请号：US14236350

申请日：2012-08-14

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/00 ,  G10L19/26 ,  G10L19/022 ,  G10L21/038 ,  G10L25/21 ,  G10L19/02

CPC分类号： G10L19/265 ,  G10L19/0204 ,  G10L19/022 ,  G10L21/038 ,  G10L25/21

摘要： The present technology relates to an encoding device and an encoding method, a decoding device and a decoding method, and a program, configured to obtain a high quality audio with less encoding amount. A number-of-sections determining feature amount calculating circuit calculates a number-of-sections determining feature amount for determining the number of divisions to divide a process target section into continuous frame sections each including a frame for which the same estimation coefficient is selected, based on sub-band signals of a plurality of sub-bands constituting an input signal. A quasi-high frequency sub-band power difference calculating circuit determines the number of continuous frame sections in the process target section based on the number-of-sections determining feature amount, selects an estimation coefficient for obtaining a high frequency component of the input signal by estimation for each continuous frame section, and generates data including a coefficient index for obtaining the estimation coefficient. A high frequency encoding circuit encodes the obtained data, and generates high frequency encoded data. The present technology can be applied to an encoding device.

公开(公告)号：US09361900B2

公开(公告)日：2016-06-07

申请号：US14237990

申请日：2012-08-14

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/00 ,  G10L21/00 ,  G10L19/26 ,  G10L21/038

CPC分类号： G10L19/265 ,  G10L21/038

摘要： The present technology relates to an encoding device and method, a decoding device and method, and a program, which enable improvement of audio quality.A QMF sub-band power calculation unit calculates power of a QMF sub-band signal of a high frequency QMF sub-band among a plurality of the QMF sub-bands constituting an input signal. A high frequency sub-band power calculation unit carries out an operation to weight more a QMF sub-band power having larger power as for a sub-band including a number of the high frequency QMF sub-bands to calculate high frequency sub-band power of the sub-band. The multiplexing circuit multiplexes high frequency encoded data and low frequency encoded data for outputting. The high frequency encoded data is selected based on the high frequency sub-band power and obtained by encoding information used for obtaining a high frequency component of the input signal by estimating, and the low frequency encoded data is obtained by encoding low frequency components of the input signal. The present technology can be applied to encoding devices.

摘要翻译： 本技术涉及能够提高音频质量的编码装置和方法，解码装置和方法以及程序。 QMF子带功率计算单元计算构成输入信号的多个QMF子带中的高频QMF子带的QMF子带信号的功率。 高频子带功率计算单元执行对包含多个高频QMF子带的子带的功率较大的QMF子带功率进行加权的运算，以计算高频子带功率 的子带。 复用电路复用高频编码数据和低频编码数据进行输出。 基于高频子带功率选择高频编码数据，并通过估计来获得输入信号的高频分量的编码信息，低频编码数据是通过编码低频编码数据 输入信号。 本技术可以应用于编码设备。

公开(公告)号：US20140200900A1

公开(公告)日：2014-07-17

申请号：US14237990

申请日：2012-08-14

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/26

CPC分类号： G10L19/265 ,  G10L21/038

摘要： The present technology relates to an encoding device and method, a decoding device and method, and a program, which enable improvement of audio quality.A QMF sub-band power calculation unit calculates power of a QMF sub-band signal of a high frequency QMF sub-band among a plurality of the QMF sub-bands constituting an input signal. A high frequency sub-band power calculation unit carries out an operation to weight more a QMF sub-band power having larger power as for a sub-band including a number of the high frequency QMF sub-bands to calculate high frequency sub-band power of the sub-band. The multiplexing circuit multiplexes high frequency encoded data and low frequency encoded data for outputting. The high frequency encoded data is selected based on the high frequency sub-band power and obtained by encoding information used for obtaining a high frequency component of the input signal by estimating, and the low frequency encoded data is obtained by encoding low frequency components of the input signal. The present technology can be applied to encoding devices.

摘要翻译： 本技术涉及能够提高音频质量的编码装置和方法，解码装置和方法以及程序。 QMF子带功率计算单元计算构成输入信号的多个QMF子带中的高频QMF子带的QMF子带信号的功率。 高频子带功率计算单元执行对包含多个高频QMF子带的子带的功率较大的QMF子带功率进行加权的运算，以计算高频子带功率 的子带。 复用电路复用高频编码数据和低频编码数据进行输出。 基于高频子带功率选择高频编码数据，并通过估计来获得输入信号的高频分量的编码信息，低频编码数据是通过编码低频编码数据 输入信号。 本技术可以应用于编码设备。

公开(公告)号：US20140200899A1

公开(公告)日：2014-07-17

申请号：US14236350

申请日：2012-08-14

申请人： Yuki Yamamoto ,  Toru Chinen

发明人： Yuki Yamamoto ,  Toru Chinen

IPC分类号： G10L19/26

CPC分类号： G10L19/265 ,  G10L19/0204 ,  G10L19/022 ,  G10L21/038 ,  G10L25/21

摘要： The present technology relates to an encoding device and an encoding method, a decoding device and a decoding method, and a program, configured to obtain a high quality audio with less encoding amount. A number-of-sections determining feature amount calculating circuit calculates a number-of-sections determining feature amount for determining the number of divisions to divide a process target section into continuous frame sections each including a frame for which the same estimation coefficient is selected, based on sub-band signals of a plurality of sub-bands constituting an input signal. A quasi-high frequency sub-band power difference calculating circuit determines the number of continuous frame sections in the process target section based on the number-of-sections determining feature amount, selects an estimation coefficient for obtaining a high frequency component of the input signal by estimation for each continuous frame section, and generates data including a coefficient index for obtaining the estimation coefficient. A high frequency encoding circuit encodes the obtained data, and generates high frequency encoded data. The present technology can be applied to an encoding device.

摘要翻译： 本技术涉及编码装置和编码方法，解码装置和解码方法以及程序，被配置为获得具有较少编码量的高质量音频。 多个部分确定特征量计算电路计算用于确定划分次数的部分数量确定特征量，以将处理目标部分划分成连续帧部分，每个连续帧部分包括选择相同估计系数的帧， 基于构成输入信号的多个子带的子带信号。 准高频子带功率差计算电路基于片数确定特征量确定处理目标部分中的连续帧部分的数量，选择用于获得输入信号的高频分量的估计系数 通过对每个连续帧部分的估计，并且生成包括用于获得估计系数的系数索引的数据。 高频编码电路对获得的数据进行编码，并生成高频编码数据。 本技术可以应用于编码装置。

公开(公告)号：US08825495B2

公开(公告)日：2014-09-02

申请号：US13057219

申请日：2010-06-03

申请人： Minoru Tsuji ,  Toru Chinen

发明人： Minoru Tsuji ,  Toru Chinen

IPC分类号： G10L19/00

CPC分类号： G10L19/022 ,  G10L19/008 ,  G10L19/0212

摘要： The amount of computation in an acoustic signal decoding apparatus for a signal transform process from a frequency domain to a time domain is reduced while realizing the generation of appropriate output acoustic signals.An output control unit 340 receives, from a code string separating unit 310, pieces of window information including a window shape showing the type window function related to a windowing process of input channels, and, if all the pieces of window information are the same, switches the connections of output switching units 351 to 355 to a frequency domain mixing unit 510. The frequency domain mixing unit 510 mixes frequency domain signals of five channels supplied from a decoding/dequantizing unit 320 on the basis of downmix information that causes the number of output channels to be smaller than the number of input channels. IMDC/windowing processing units 521 and 522 transform frequency domain signals of two channels output from the frequency domain mixing unit 510 into time domain signals, thereby outputting the signals as acoustic signals of two channels.

摘要翻译： 用于从频域到时域的信号变换处理的声信号解码装置中的计算量减少，同时实现适当的输出声信号的产生。 输出控制单元340从代码串分离单元310接收包括显示与输入通道的加窗处理相关的类型窗函数的窗口形状的窗口信息，并且如果所有窗口信息相同， 将输出切换单元351至355的连接切换到频域混合单元510.频域混合单元510根据下混信息混合从解码/去量化单元320提供的五个信道的频域信号， 输出通道小于输入通道的数量。 IMDC /开窗处理单元521和522将从频域混合单元510输出的两个声道的频域信号转换为时域信号，从而将该信号作为两声道的声信号输出。

公开(公告)号：US08364474B2

公开(公告)日：2013-01-29

申请号：US13010981

申请日：2011-01-21

申请人： Hiroyuki Honma ,  Toru Chinen

发明人： Hiroyuki Honma ,  Toru Chinen

IPC分类号： G10L21/00

CPC分类号： H04B1/667 ,  G10L19/02

摘要： A signal encoding device for encoding an input time-series signal includes: partitioning means; low-frequency encoding means; high-frequency gain information generating means; low-frequency reference value information generating means; high-frequency gain difference information generating means; high-frequency gain difference information encoding means; and multiplexing means.

摘要翻译： 用于编码输入时间序列信号的信号编码装置包括：分割装置; 低频编码手段; 高频增益信息发生装置; 低频参考值信息产生装置; 高频增益差信息发生装置; 高频增益差信息编码装置; 和多路复用装置。