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    • 4. 发明授权
    • Musical piece recommendation system and method
    • 音乐推荐系统及方法
    • US08370277B2
    • 2013-02-05
    • US12671255
    • 2008-07-31
    • Masataka GotoKazuyoshi YoshiiHiroshi Okuno
    • Masataka GotoKazuyoshi YoshiiHiroshi Okuno
    • G06F15/18
    • G06F17/30766G06Q30/02G10H1/0008G10H2210/031G10H2240/081G10H2240/105G10H2240/131
    • A musical piece recommendation system that allows instantaneous registration of a new user and a new musical piece without retraining in a basic training section. A first incremental training section monitors a rating history storage section, and each time a change is made to a rating history or a new user is added, performs updating of or addition of the topic selection probability for the user for which the change is made to the rating history or for the new user such that the likelihood determined by a basic training section is kept maximized. A second incremental training section monitors an acoustic feature storage section, and each time a new musical piece is added to perform addition to acoustic features, adds the musical piece selection probability related to the added musical piece such that the likelihood determined by the basic training section is kept maximized.
    • 一种音乐作品推荐系统,允许新用户和新音乐作品的瞬时注册,而不需要在基本训练部分重新训练。 第一增量训练部分监视评级历史存储部分,并且每当对评级历史进行改变或添加新用户时,对进行了改变的用户进行主题选择概率的更新或添加 评级历史或新用户使得由基本训练部确定的可能性被保持最大化。 第二增量训练部分监视声学特征存储部分,并且每当添加新的音乐作品以对声学特征进行加法时,增加与所添加的乐曲相关的乐曲选择概率,使得由基本训练部分确定的可能性 被保持最大化。
    • 6. 发明申请
    • MUSIC AUDIO SIGNAL GENERATING SYSTEM
    • 音乐音频信号发生系统
    • US20120046771A1
    • 2012-02-23
    • US13201757
    • 2010-02-16
    • Takehiro AbeNaoki YasuraokaKatsutoshi ItoyamaHiroshi Okuno
    • Takehiro AbeNaoki YasuraokaKatsutoshi ItoyamaHiroshi Okuno
    • G06F17/00
    • G10H1/16G10H2210/066G10H2250/615G10L25/90G10L2021/0135
    • A system for timbral change, capable of changing timbres included in an existing music audio signal to arbitrary timbres. Replaced harmonic peak parameters are created by replacing a plurality of harmonic peaks included in harmonic peak parameters, which are stored in a separated audio signal analyzing and storing section 3 and indicate relative amplitudes of n-th order harmonic components of each tone generated by a musical instrument of a first kind, with harmonic peaks included in harmonic peak parameters, which are stored in a replacement parameter storing section 6 and indicate relative amplitudes of n-th order harmonic components of each tone generated by a musical instrument of a second kind and corresponding to each tone generated by the musical instrument of the first kind. A synthesized separated audio signal generating section 7 generates a synthesized separated audio signal for each tone using parameters other than the harmonic peak parameters and the replaced harmonic peak parameters.
    • 一种用于音乐变化的系统,能够将现有音乐音频信号中包含的音色改变为任意音色。 通过替换存储在分离的音频信号分析和存储部分3中的谐波峰值参数中包括的多个谐波峰值并且指示由音乐产生的每个音调的n次谐波分量的相对幅度来创建替换的谐波峰值参数 包含在谐波峰值参数中的谐波峰值的仪器,其存储在替换参数存储部分6中,并且指示由第二类乐器产生的每个音调的n次谐波分量的相对振幅,并且对应于 对于由第一种乐器产生的每个音调。 合成分离音频信号生成部分7使用除了谐波峰值参数和替换的谐波峰值参数之外的参数,为每个音调产生合成的分离音频信号。
    • 8. 发明申请
    • SOUND SOURCE SEPARATION SYSTEM, SOUND SOURCE SEPARATION METHOD, AND COMPUTER PROGRAM FOR SOUND SOURCE SEPARATION
    • 声源分离系统,声源分离方法和用于声源分离的计算机程序
    • US20100131086A1
    • 2010-05-27
    • US12595542
    • 2008-04-14
    • Katsutoshi ItoyamaHiroshi OkunoMasataka Goto
    • Katsutoshi ItoyamaHiroshi OkunoMasataka Goto
    • G06F17/10G09B15/02G06F17/00G06G7/62
    • G10H3/125G10H1/0008G10H2210/056G10H2210/066G10H2210/086G10H2210/301G10H2240/056G10H2250/031
    • An audio signal produced by playing a plurality of musical instruments is separated into sound sources according to respective instrument sounds. Each time a separation process is performed, the updated model parameter estimation/storage section 114 estimates parameters respectively contained in updated model parameters such that updated power spectrograms gradually change from a state close to initial power spectrograms to a state close to a plurality of power spectrograms most recently stored in a power spectrogram separation/storage section. Respective sections including the power spectrogram separation/storage section 112 and an updated distribution function computation/storage section 118 repeatedly perform process operations until the updated power spectrograms change from the state close to the initial power spectrograms to the state close to the plurality of power spectrograms most recently stored in the power spectrogram separation/storage section 112. The final updated power spectrograms are close to the power spectrograms of single tones of one musical instrument contained in the input audio signal formed to contain harmonic and inharmonic models.
    • 通过播放多个乐器产生的音频信号根据相应的乐器声音被分离成声源。 每当执行分离处理时,更新的模型参数估计/存储部114估计更新的模型参数中包含的参数,使得更新的功率谱图从接近初始功率谱图的状态逐渐变化到接近多个功率谱图的状态 最近存储在功率谱图分离/存储部分中。 包括功率谱图分离/存储部分112和更新的分布函数计算/存储部分118的各个部分重复执行处理操作,直到更新的功率谱图从接近初始功率谱图的状态改变到接近多个功率谱图的状态 最近存储在功率谱图分离/存储部分112中。最终更新的功率谱图接近包含在形成为包含谐波和非谐波模型的输入音频信号中的一个乐器的单个音调的功率谱图。
    • 10. 发明申请
    • SOUND-SOURCE SEPARATION SYSTEM
    • 声源分离系统
    • US20090043588A1
    • 2009-02-12
    • US12187684
    • 2008-08-07
    • Ryu TakedaKazuhiro NakadaiHiroshi TsujinoHiroshi Okuno
    • Ryu TakedaKazuhiro NakadaiHiroshi TsujinoHiroshi Okuno
    • G10L21/00
    • G10L21/0272
    • A system capable of reducing the influence of sound reverberation or reflection to improve sound-source separation accuracy. An original signal X(ω,f) is separated from an observed signal Y(ω,f) according to a first model and a second model to extract an unknown signal E(ω,f). According to the first model, the original signal X(ω,f) of the current frame f is represented as a combined signal of known signals S(ω,f−m+1) (m=1 to M) that span a certain number M of current and previous frames. This enables extraction of the unknown signal E(ω,f) without changing the window length while reducing the influence of reverberation or reflection of the known signal S(ω,f) on the observed signal Y(ω,f).
    • 一种能够减少声音混响或反射影响以提高声源分离精度的系统。 根据第一模型和第二模型将原始信号X(ω,f)与观察信号Y(ω,f)分离以提取未知信号E(ω,f)。 根据第一模型,当前帧f的原始信号X(ω,f)被表示为已知信号S(ω,f-m + 1)(m = 1到M)的组合信号, 当前帧和前一帧的M个。 这可以在不改变窗口长度的情况下提取未知信号E(ω,f),同时减少已知信号S(ω,f)的混响或反射对观测信号Y(ω,f)的影响。