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1. 发明申请

US20070160236A1 Audio signal encoding device, audio signal decoding device, and method and program thereof 审中-公开
标题翻译：音频信号编码装置，音频信号解码装置及其方法和程序
公开(公告)号：US20070160236A1
公开(公告)日：2007-07-12
申请号：US10589818
申请日：2005-07-01
申请人： Kazuhiro Iida , Mineo Tsushima , Yoshiaki Takagi , Naoya Tanaka
发明人： Kazuhiro Iida , Mineo Tsushima , Yoshiaki Takagi , Naoya Tanaka
IPC分类号： H04B1/00 , H04B1/20
CPC分类号： H04S3/00
摘要： An audio signal encoding device includes a downmix signal encoding unit 203 and an auxiliary information generation unit 204. The downmix signal encoding unit 203 generates a downmix signal acquired by adding input signals each other using a predetermined method, encodes the downmix signal, and outputs downmix signal information 206. The auxiliary information generation unit 204 generates auxiliary information 205 using the downmix signal and the downmix signal information 206 generated by the downmix signal encoding unit 203. The auxiliary information generation unit 204 efficiently quantizes the auxiliary information 205 using human's characteristics of a perceptual direction of a sound source, a perceptual broadening, and a perceptual distance.
摘要翻译：音频信号编码装置包括下混信号编码单元203和辅助信息生成单元204。下混信号编码单元203通过使用预定方法相加输入信号而产生下混信号，对下混信号进行编码，并输出下混合信号信息206。辅助信息生成单元204使用由混合信号编码单元203生成的下混信号和下混信号信息206来生成辅助信息205。辅助信息生成单元204使用人的声源的感知方向，感知加宽度和感知距离的特性来有效地量化辅助信息205。

2. 发明授权

US08046217B2 Geometric calculation of absolute phases for parametric stereo decoding 有权
标题翻译：用于参数立体声解码的绝对相位的几何计算
公开(公告)号：US08046217B2
公开(公告)日：2011-10-25
申请号：US11660094
申请日：2005-08-02
申请人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
发明人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
IPC分类号： G10L19/14 , G10L19/00 , G10L19/02
CPC分类号： G10L19/008 , H04S3/00
摘要： An audio decoder which reproduces original signals from a bit stream including (i) a downmix signal of the original signals, and (ii) supplementary information indicating a gain ratio D and phase difference θ between the original signals. The audio decoder includes: a decoding unit extracting the downmix signal; a transformation unit transforming the extracted downmix signal into a frequency domain signal; a phase rotator determination unit determining two phase rotators having, as the phase rotation angles, angles α and β respectively obtained by dividing a contained angle by a diagonal of a parallelogram; a separation unit separating the frequency domain signal into two separation signals respectively indicating angles α and β as phase differences between the signals and the decoded downmix signal; and an inverse transformation unit inversely transforming the respective two separation signals into time domain signals so as to reproduce the two audio signals.
摘要翻译：一种从比特流再现原始信号的音频解码器，包括（i）原始信号的下混信号，以及（ii）指示增益比D和相位差的补充信息; 之间的原始信号。音频解码器包括：提取下混合信号的解码单元; 变换单元，将提取的下混合信号变换为频域信号; 相位旋转器确定单元确定具有角度α和＆lt; bgr的相位旋转角度的两个相位旋转器; 分别通过将包含的角度除以平行四边形的对角线而获得; 分离单元，将频域信号分离成分别表示角度α和＆lt; bgr的两个分离信号; 作为信号与解码缩混信号之间的相位差; 以及逆变换单元，将相应的两个分离信号逆变换为时域信号，以再现两个音频信号。

3. 发明申请

US20080059203A1 Audio Encoding Device, Decoding Device, Method, and Program 有权
标题翻译：音频编码装置，解码装置，方法和程序
公开(公告)号：US20080059203A1
公开(公告)日：2008-03-06
申请号：US11597558
申请日：2005-09-13
申请人： Mineo Tsushima , Yoshiaki Takagi , Kojiro Ono , Naoya Tanaka , Shuji Miyasaka
发明人： Mineo Tsushima , Yoshiaki Takagi , Kojiro Ono , Naoya Tanaka , Shuji Miyasaka
IPC分类号： G10L19/00
CPC分类号： G10L19/0208 , G10L19/008
摘要： Provided are an audio encoding device and an audio decoding device, by which optimal trade-off between code rates and sound quality can be flexibly adjusted. A variable frequency segmentation encoding unit (110) has: difference degree calculation units (101, 102, and 103) for calculating a difference degree between the first and second input signals, depending on a segmentation method A, B, or C for segmenting a frequency band into sub-bands; a selection unit (104) for selecting one of the segmentation methods; and a difference degree and segmentation information encoding unit (105) for encoding the selected method and the difference degree for each sub-band by the method. A variable frequency segment decoding unit (210) has: a segmentation information decoding unit 202 for decoding the segmentation information to learn the segmentation method; a switching unit (203) for outputting a difference degree code to one of difference degree decoding units corresponding to the segmentation method; and difference degree decoding units (204, 205, and 206), for decoding the difference degree code to the difference degree for each sub-band.
摘要翻译：提供了一种音频编码装置和音频解码装置，可以灵活地调整码率和声音质量之间的最佳权衡。可变频率分割编码单元（110）具有：用于计算第一和第二输入信号之间的差值的差分计算单元（101,102和103），这取决于分段方法A，B或C，用于分割频带变成子带; 选择单元（104），用于选择所述分割方法之一; 以及用于通过该方法对所选择的方法和每个子带的差分度进行编码的差分度和分割信息编码单元（105）。可变频段解码单元（210）具有：分割信息解码单元202，对分割信息进行解码以学习分割方法; 切换单元，用于将差分度码输出到与分割方法对应的差分度解码单元之一; 和差分度解码单元（204,205和206），用于将差分度码解码为每个子带的差分度。

4. 发明申请

US20070255572A1 Audio Decoder, Method and Program 有权
标题翻译：音频解码器，方法和程序
公开(公告)号：US20070255572A1
公开(公告)日：2007-11-01
申请号：US11660094
申请日：2005-08-02
申请人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
发明人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S3/00
摘要： An audio decoder which reproduces original signals from a bit stream including a downmix signal of the original signals and supplementary information indicating the gain ratio D and the phase difference θ between the original signals. The audio decoder which reproduces the original signals includes: a decoding unit (100) which extracts the downmix signal from the bitstream; a transformation unit (101) which transforms the extracted downmix signal into a frequency domain signal; a phase rotator determination unit (102) which determines two phase rotators having, as the phase rotation angles, angles α and β respectively obtained by dividing a contained angle by a diagonal of a parallelogram where the length ratio of two adjacent sides equals to the gain ratio D and the contained angle equals to the phase difference θ, a separation unit (103) which separates the frequency domain signal into two separation signals respectively indicating angles α and β as phase differences between the signals and the decoded downmix signal, and an inverse transformation unit (104) which inversely transforms the respective two separation signals into time domain signals so as to reproduce the two audio signals.
摘要翻译：一种音频解码器，其从包括原始信号的下混信号的比特流中再现原始信号，以及指示增益比D和原始信号之间的相位差θ的补充信息。再现原始信号的音频解码器包括：解码单元（100），其从比特流中提取降混信号; 变换单元，其将所提取的下混信号变换为频域信号; 相位旋转器确定单元（102），其确定两个相位旋转器，其具有作为相位旋转角度的角度α和β，分别通过将包含的角度除以两个相邻边的长度比等于增益的平行四边形的对角线获得比率D和包含的角度等于相位差θ，分离单元（103）将频域信号分离成分别表示角度α和β的两个分离信号，作为信号和解码的下混信号之间的相位差，以及反相变换单元（104），其将相应的两个分离信号逆变换为时域信号，以便再现两个音频信号。

5. 发明授权

US07848931B2 Audio encoder 有权
标题翻译：音频编码器
公开(公告)号：US07848931B2
公开(公告)日：2010-12-07
申请号：US11659949
申请日：2005-08-18
申请人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
发明人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
IPC分类号： G10L19/00
CPC分类号： G11B27/022 , G10L19/008 , G11B20/00007
摘要： An audio encoder, which is capable of encoding multiple-channel signals so that only a downmixed signal is decoded and of further generating specific auxiliary information necessary for dividing the downmixed signal, is provided.An audio encoder (10), which compresses and encodes audio signals of N-channels (N>1), includes a downmixed signal encoding unit (11) which encodes the downmixed signal obtained by downmixing the audio signals, and an auxiliary information generation unit (12a) which generates auxiliary information necessary for decoding the downmixed signal encoded by the downmixed signal encoding unit (11) into N-channel audio signals. The auxiliary information generation unit (12a) includes transformation units (121) and (122) which transform audio signals respectively into frequency domain signals, a detection unit (123) which detects phase difference information and gain ratio information each indicates a degree of difference between frequency domain signals, and a quantization unit (125) which quantizes, for each frequency band, the phase difference information and gain ratio information detected by the detection unit (123) using the quantization precision setting table (124). The quantization precision setting table (124) functions as a division unit which divides a frequency band of a frequency domain signal into plural sub-bands.
摘要翻译：一种音频编码器，其能够对多声道信号进行编码，使得只下降混合信号被解码，并且进一步产生分割下混合信号所需的特定辅助信息。对N声道（N> 1）的音频信号进行压缩编码的音频编码器（10）包括下混合信号编码单元（11），其对通过降低音频信号而获得的下混合信号进行编码，以及辅助信息生成单元（12a），其生成将由下混合信号编码单元（11）编码的下混合信号解码为N声道音频信号所需的辅助信息。辅助信息生成单元（12a）包括将音频信号分别变换为频域信号的变换单元（121）和（122），检测单元（123），检测相位差信息和增益比信息，每个都表示频域信号，以及量化单元（125），其对于每个频带，使用量化精度设定表（124）对由检测单元（123）检测的相位差信息和增益比信息进行量化。量化精度设定表（124）作为将频域信号的频带划分为多个子带的分割单位起作用。

6. 发明授权

US07860721B2 Audio encoding device, decoding device, and method capable of flexibly adjusting the optimal trade-off between a code rate and sound quality 有权
标题翻译：音频编码装置，解码装置和方法，其能够灵活地调整码率和声音质量之间的最佳权衡
公开(公告)号：US07860721B2
公开(公告)日：2010-12-28
申请号：US11597558
申请日：2005-09-13
申请人： Mineo Tsushima , Yoshiaki Takagi , Kojiro Ono , Naoya Tanaka , Shuji Miyasaka
发明人： Mineo Tsushima , Yoshiaki Takagi , Kojiro Ono , Naoya Tanaka , Shuji Miyasaka
IPC分类号： G10L19/00
CPC分类号： G10L19/0208 , G10L19/008
摘要： Provided are an audio encoding device and an audio decoding device, by which optimal trade-off between code rates and sound quality can be flexibly adjusted. A variable frequency segmentation encoding unit includes: difference degree calculation units for calculating a difference degree between first and second input signals depending on a segmentation method for segmenting a frequency band into sub-bands; a selection unit for selecting one of the segmentation methods; and a difference degree and segmentation information encoding unit for encoding the selected method and the difference degree for each sub-band. A variable frequency segment decoding unit includes: a segmentation information decoding unit for decoding the segmentation information to learn the segmentation method; a switching unit for outputting a difference degree code corresponding to the segmentation method; and difference degree decoding units for decoding the difference degree code to the difference degree for each sub-band.
摘要翻译：提供了一种音频编码装置和音频解码装置，可以灵活地调整码率和声音质量之间的最佳权衡。可变频率分割编码单元包括：差分度计算单元，用于根据用于将频带分割为子带的分割方法计算第一和第二输入信号之间的差值; 选择单元，用于选择所述分割方法之一; 以及差分度和分割信息编码单元，用于对所选择的方法和每个子带的差分度进行编码。可变频段解码单元包括：分割信息解码单元，用于对分割信息进行解码以学习分割方法; 切换单元，用于输出与分割方法对应的差分度码; 以及差分度解码单元，用于将差分度码解码为每个子带的差分度。

7. 发明申请

US20070271095A1 Audio Encoder 有权
标题翻译：音频编码器
公开(公告)号：US20070271095A1
公开(公告)日：2007-11-22
申请号：US11659949
申请日：2005-08-18
申请人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
发明人： Shuji Miyasaka , Yoshiaki Takagi , Naoya Tanaka , Mineo Tsushima
IPC分类号： G10L19/00 , G10L19/02 , H03M7/30
CPC分类号： G11B27/022 , G10L19/008 , G11B20/00007
摘要： An audio encoder, which is capable of encoding multiple-channel signals so that only a downmixed signal is decoded and of further generating specific auxiliary information necessary for dividing the downmixed signal, is provided. An audio encoder (10), which compresses and encodes audio signals of N-channels (N>1), includes a downmixed signal encoding unit (11) which encodes the downmixed signal obtained by downmixing the audio signals, and an auxiliary information generation unit (12a) which generates auxiliary information necessary for decoding the downmixed signal encoded by the downmixed signal encoding unit (11) into N-channel audio signals. The auxiliary information generation unit (12a) includes transformation units (121) and (122) which transform audio signals respectively into frequency domain signals, a detection unit (123) which detects phase difference information and gain ratio information each indicates a degree of difference between frequency domain signals, and a quantization unit (125) which quantizes, for each frequency band, the phase difference information and gain ratio information detected by the detection unit (123) using the quantization precision setting table (124). The quantization precision setting table (124) functions as a division unit which divides a frequency band of a frequency domain signal into plural sub-bands.
摘要翻译：一种音频编码器，其能够对多声道信号进行编码，使得只下降混合信号被解码，并且进一步产生分割下混合信号所需的特定辅助信息。对N声道（N> 1）的音频信号进行压缩编码的音频编码器（10）包括下混合信号编码单元（11），其对通过降低音频信号而获得的下混合信号进行编码，以及辅助信息生成单元（12a），其产生将由下混合信号编码单元（11）编码的下混合信号解码成N声道音频信号所需的辅助信息。辅助信息生成单元（12a）包括将音频信号分别变换为频域信号的变换单元（121）和（122），检测单元（123），其检测相位差信息，增益比信息各自表示差异度和量化单元（125），其对于每个频带，使用量化精度设定表（124）对由检测单元（123）检测的相位差信息和增益比信息进行量化。量化精度设定表（124）作为将频域信号的频带划分为多个子带的分割单位起作用。

8. 发明授权

US08108222B2 Encoding device and decoding device 有权
标题翻译：编码设备和解码设备
公开(公告)号：US08108222B2
公开(公告)日：2012-01-31
申请号：US12836900
申请日：2010-07-15
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L21/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译：一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。

9. 发明授权

US07783496B2 Encoding device and decoding device 有权
标题翻译：编码设备和解码设备
公开(公告)号：US07783496B2
公开(公告)日：2010-08-24
申请号：US12370203
申请日：2009-02-12
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L21/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译：一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。

10. 发明授权

US07509254B2 Encoding device and decoding device 有权
标题翻译：编码设备和解码设备
公开(公告)号：US07509254B2
公开(公告)日：2009-03-24
申请号：US11508915
申请日：2006-08-24
申请人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
发明人： Mineo Tsushima , Takeshi Norimatsu , Kosuke Nishio , Naoya Tanaka
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/0208 , G10L19/0212
摘要： An encoding device (200) includes an MDCT unit (202) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit (204) that generates extension data which specifies a higher frequency spectrum at a higher frequency than the lower frequency spectrum, and an encoded data stream generating unit (205) that encodes to output the lower frequency spectrum obtained by the MDCT unit (202) and the extension data obtained by the BWE encoding unit (204). The BWE encoding unit (204) generates as the extension data (i) a first parameter which specifies a lower subband which is to be copied as the higher frequency spectrum from among a plurality of the lower subbands which form the lower frequency spectrum obtained by the MDCT unit (202) and (ii) a second parameter which specifies a gain of the lower subband after being copied.
摘要翻译：一种编码装置（200）包括：将时域中的输入信号变换成包括较低频谱的频谱的MDCT单元（202），生成扩展数据的BWE编码单元（204），其生成指定较高频谱的扩展数据频率高于较低频谱的编码数据流生成单元（205），其编码为输出由MDCT单元（202）获得的较低频谱和由BWE编码单元（204）获得的扩展数据。 BWE编码单元（204）生成作为扩展数据（i）的第一参数，该第一参数指定要从多个下个子带中复制的较低子带作为较高频谱，其形成由 MDCT单元（202）和（ii）指定复制后下一个子带的增益的第二参数。

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