公开(公告)号：US09613635B2

公开(公告)日：2017-04-04

申请号：US14411094

申请日：2013-06-26

申请人： Yamaha Corporation

发明人： Norihiro Uemura ,  Eiji Murata

IPC分类号： G10L21/04 ,  G10H7/00 ,  G10H1/22 ,  G10H7/02 ,  G10L21/01 ,  G11B20/10 ,  G11B27/00 ,  G10H1/40 ,  G10H1/00

CPC分类号： G10L21/04 ,  G10H1/00 ,  G10H1/0066 ,  G10H1/22 ,  G10H1/40 ,  G10H7/006 ,  G10H7/02 ,  G10H2210/385 ,  G10H2230/041 ,  G10H2250/541 ,  G10H2250/621 ,  G10H2250/635 ,  G10H2250/645 ,  G10L21/01 ,  G11B20/10527 ,  G11B27/005

摘要： In order to play waveform data back at a variable performance tempo by using waveform data which complies with a desired reference tempo, the present invention performs a timeline-expansion/contraction control on the waveform data to be played back, according to the relationship between the performance tempo and the reference tempo. The present invention also determines whether to limit the playback of the waveform data according to the relationship between the performance tempo and the reference tempo. In the case that playback is to be limited, the present invention stops playback of the waveform data, or reduces the resolution of playback processing and continues playback of the waveform data. The present invention stops playback of the waveform data when, for example, the relationship between the performance tempo and the reference tempo is a relationship in which the waveform data would be played back at a performance tempo which would cause a processing delay or a deterioration of sound quality. As a result, it is possible to preemptively prevent a system freeze and solve problems such as the generation of music which has a slower tempo than the desired performance tempo, or the generation of music which includes the intermittent cutting out of sound due to noise, or a significant reduction to sound quality.

公开(公告)号：US20080148924A1

公开(公告)日：2008-06-26

申请号：US11953215

申请日：2007-12-10

申请人： Chi-Ying Tsui ,  Bertram Shi ,  Chi Wai Yung

发明人： Chi-Ying Tsui ,  Bertram Shi ,  Chi Wai Yung

IPC分类号： G10H1/22

CPC分类号： G10H3/125 ,  G09B15/023 ,  G10H1/0008 ,  G10H2210/066 ,  G10H2210/076 ,  G10H2240/111 ,  G10H2240/141 ,  G10H2240/251 ,  G10H2240/305 ,  G10H2250/031 ,  G10H2250/135 ,  G10H2250/645

摘要： A music retrieval system which take an input melody as the query. In one embodiment, changes or differences in the distribution of energy across the frequency spectrum over time are used to find breakpoints in the input melody in order to separate it into distinct notes. In another embodiment the breakpoints are identified based on changes in pitch over time. A confidence level is preferably associated with each breakpoint and/or note extracted from the input melody. The confidence level is based on one or more of: changes in pitch, absolute values of a spectral energy distribution indicator, relative values of the spectral energy distribution indicator, and the energy level of the input melody. The process of matching the input melody with songs in the music database is based on minimizing a cost computation that takes into account errors in the insertion and deletion of notes, and penalizes these errors in accordance with the confidence levels of the breakpoints and/or notes.

摘要翻译： 作为查询输入旋律的音乐检索系统。 在一个实施例中，使用随时间推移的频谱上的能量分布的变化或差异来找到输入旋律中的断点，以便将其分离成不同的音符。 在另一个实施例中，基于随时间变化的音调来识别断点。 置信水平优选地与从输入旋律提取的每个断点和/或音符相关联。 置信水平基于以下中的一个或多个：音调的变化，频谱能量分布指示器的绝对值，频谱能量分布指示器的相对值和输入旋律的能量水平。 将音乐数据库中的输入曲调与歌曲相匹配的过程基于最小化考虑到插入和删除音符中的错误的成本计算，并根据断点和/或音符的置信水平惩罚这些错误 。

公开(公告)号：US4618851A

公开(公告)日：1986-10-21

申请号：US643065

申请日：1984-08-22

申请人： Tokumi Watanabe

发明人： Tokumi Watanabe

IPC分类号： H03B28/00 ,  G01H7/00 ,  G10G3/04 ,  G10H7/00 ,  G10H7/02 ,  G11C7/02 ,  H03M1/00 ,  G10H1/02 ,  G10H3/03 ,  H03M1/70

CPC分类号： G10H7/02 ,  G10G3/04 ,  H03M1/1047 ,  G10H2250/645

摘要： An apparatus for reproducing signals which are pre-stored in a memory, comprises a memory pre-stored with signals made up of a level and gain change codes, a detecting circuit for detecting the gain change code from a signal read out from the memory, and a converting circuit supplied with the signal read out from the memory, for producing a reproduced signal having a waveform which is essentially the same as the original analog signal waveform. The level code is an original analog signal which is amplified, sampled, and digitally coded. The original analog signal has a level smaller than threshold values in a small level region. The gain change code has predetermined values and replaces the level code at least for a certain period from a predetermined time in the small level region. The converting circuit is variably controlled of a gain thereof after receiving an output detection signal of the detecting circuit so as to attenuate the level of the signal read out from the memory to an extent complementary to the amplification performed at the time when the signal is pre-stored in the memory, and subjects the signal read out from the memory to a digital-to-analog conversion regardless of whether the detection signal is received.

摘要翻译： 一种用于再现预先存储在存储器中的信号的装置，包括一个预存储有由一个电平和增益改变码组成的信号的存储器，一个检测电路，用于从存储器读出的信号中检测增益改变码， 以及转换电路，其被提供有从存储器读出的信号，用于产生具有与原始模拟信号波形基本相同的波形的再现信号。 电平代码是原始模拟信号，被放大，采样和数字编码。 原始模拟信号的电平小于小电平区域中的阈值。 增益改变码具有预定值，并且从小级别区域中的预定时间至少在一段时间内替换电平代码。 在接收到检测电路的输出检测信号之后，转换电路可变地控制其增益，以便将从存储器读出的信号的电平衰减到在信号预先时执行的放大的补充程度 存储在存储器中，并且将从存储器读出的信号进行数模转换，而不管接收到检测信号。

公开(公告)号：US07919706B2

公开(公告)日：2011-04-05

申请号：US11953215

申请日：2007-12-10

申请人： Chi-ying Tsui ,  Bertram Shi ,  Chi Wai Yung

发明人： Chi-ying Tsui ,  Bertram Shi ,  Chi Wai Yung

IPC分类号： G06F7/00 ,  G06F17/00 ,  G10H1/22

CPC分类号： G10H3/125 ,  G09B15/023 ,  G10H1/0008 ,  G10H2210/066 ,  G10H2210/076 ,  G10H2240/111 ,  G10H2240/141 ,  G10H2240/251 ,  G10H2240/305 ,  G10H2250/031 ,  G10H2250/135 ,  G10H2250/645

摘要： A music retrieval system which take an input melody as the query. In one embodiment, changes or differences in the distribution of energy across the frequency spectrum over time are used to find breakpoints in the input melody in order to separate it into distinct notes. In another embodiment the breakpoints are identified based on changes in pitch over time. A confidence level is preferably associated with each breakpoint and/or note extracted from the input melody. The confidence level is based on one or more of: changes in pitch, absolute values of a spectral energy distribution indicator, relative values of the spectral energy distribution indicator, and the energy level of the input melody. The process of matching the input melody with songs in the music database is based on minimizing a cost computation that takes into account errors in the insertion and deletion of notes, and penalizes these errors in accordance with the confidence levels of the breakpoints and/or notes.

摘要翻译： 作为查询输入旋律的音乐检索系统。 在一个实施例中，使用随时间推移的频谱上的能量分布的变化或差异来找到输入旋律中的断点，以便将其分离成不同的音符。 在另一个实施例中，基于随时间变化的音调来识别断点。 置信水平优选地与从输入旋律提取的每个断点和/或音符相关联。 置信水平基于以下中的一个或多个：音调的变化，频谱能量分布指示器的绝对值，频谱能量分布指示器的相对值和输入旋律的能量水平。 将音乐数据库中的输入曲调与歌曲相匹配的过程基于最小化考虑到插入和删除音符中的错误的成本计算，并根据断点和/或音符的置信水平惩罚这些错误 。

公开(公告)号：US07518056B2

公开(公告)日：2009-04-14

申请号：US10553010

申请日：2004-02-23

申请人： Thomas Lechner

发明人： Thomas Lechner

IPC分类号： G10H7/00 ,  G10H1/46 ,  H03G3/20 ,  H03G11/04

CPC分类号： G10H1/0066 ,  G10H2230/021 ,  G10H2240/251 ,  G10H2250/645

摘要： A method for adapting a score stored in a MIDI file for being reproduced on a mobile terminal to the transfer function of an electroacoustic reproduction circuitry includes test rendering of the score to obtain sampled data prior to a reproduction of the score on the mobile terminal. From these sampled data, one or more values and or combination of values for a desired electroacoustic reproduction on the mobile terminals are identified, and, based on these identified values, one or more parameters suited for adapting the score with respect to the desired or optimised reproduction on the mobile terminal are determined.

摘要翻译： 用于使存储在MIDI文件中的用于在移动终端上再现的乐谱适应于电声再现电路的传送功能的方法包括在移动终端上再现分数之前获得采样数据的分数的测试呈现。 从这些采样数据中，识别在移动终端上所需电声再现的一个或多个值和/或值的组合，并且基于这些识别的值，一个或多个参数适于相对于期望的或优化的 确定移动终端上的再现。

公开(公告)号：US4701872A

公开(公告)日：1987-10-20

申请号：US676840

申请日：1984-11-30

申请人： Masatsugu Kitamura ,  Kikuji Wagatsuma ,  Tokumi Watanabe ,  Naoki Yamashita ,  Hiroshi Yoshida

发明人： Masatsugu Kitamura ,  Kikuji Wagatsuma ,  Tokumi Watanabe ,  Naoki Yamashita ,  Hiroshi Yoshida

IPC分类号： G10H7/02 ,  G11B20/10 ,  G06F1/02 ,  G10H1/00 ,  G10H1/02

CPC分类号： G10H7/02 ,  G10H2250/645

摘要： In an apparatus for generating an aperiodic waveform having a gradually decaying envelope, a sequence of digital samples representing the magnitude of the waveform at sample points is stored in a memory. The stored digital samples are grouped into at least first and second continuous portions, the second portion including that portion of the sequence in which none of the digital samples has a magnitude exceeding 1/n the magnitude of the largest of the digital samples, where n is an integer greater than unity, each of the digital samples of the second portion being scaled by a factor of n. The memory further stores a code indicating the beginning of the second portion. An address counter develops an address signal for sequentially addressing the stored digital samples and code from the memory in response to clock pulses. When the stored code is addressed, an additional clock pulse is supplied from a code detector to the address counter. Each of the addressed digital samples of the first and second portions is scaled and converted to a signal having a magnitude corresponding to the magnitude of the associated digital sample of the sequence.

摘要翻译： 在用于产生具有逐渐衰减的包络的非周期波形的装置中，将表示采样点处的波形的幅度的数字样本序列存储在存储器中。 存储的数字样本被分组为至少第一和第二连续部分，第二部分包括其中没有一个数字样本具有超过数字样本中最大的数字的幅度的1 / n的序列的那部分，其中n 是大于1的整数，第二部分的每个数字样本被缩放n的因子。 存储器还存储指示第二部分的开始的代码。 地址计数器产生地址信号，用于响应于时钟脉冲从存储器顺序寻址存储的数字样本和代码。 当存储的代码被寻址时，从代码检测器向地址计数器提供附加的时钟脉冲。 第一部分和第二部分的寻址数字样本中的每一个被缩放并转换成具有对应于序列的相关联的数字样本的大小的幅度的信号。

公开(公告)号：US08779267B2

公开(公告)日：2014-07-15

申请号：US13734284

申请日：2013-01-04

申请人： Yamaha Corporation

发明人： Takahiro Adachi

IPC分类号： G10H7/00

CPC分类号： G10H7/02 ,  G10H1/46 ,  G10H2220/096 ,  G10H2250/541 ,  G10H2250/641 ,  G10H2250/645

摘要： A musical performance apparatus has a waveform memory WM in which sample values indicative of waveforms of a plurality of tones are stored so that the sampling periods correspond to addresses. The musical performance apparatus also has a tone generation circuit 15 which can repeatedly reproduce a section of the tone. A loop top address and loop end address corresponding to the top and end of the section of the first tone, respectively, are designated. When a reading address for reading the sample values of the first tone has reached a certain address, the tone generation circuit 15 changes the designated loop top address and the loop end address to addresses corresponding to the top and end of the section of the second tone so that the reproduction of the section of the second tone will start at a position which is situated in the section of the second tone and corresponds to the certain address.

摘要翻译： 音乐演奏装置具有波形存储器WM，其中存储指示多个音调的波形的采样值，使得采样周期对应于地址。 音乐演奏装置还具有可重复再现一部分音调的乐音产生电路15。 指定分别对应于第一音调的部分的顶部和末端的循环顶部地址和循环结束地址。 当用于读取第一音调的采样值的读取地址已经达到某个地址时，音调产生电路15将指定的回路顶部地址和循环结束地址改变为对应于第二音调的部分的顶部和末端的地址 使得第二音调的部分的再现将从位于第二音调的部分中的位置开始，并且对应于该特定地址。

公开(公告)号：US20070107586A1

公开(公告)日：2007-05-17

申请号：US10581796

申请日：2005-01-14

申请人： Ho Yan Yip

发明人： Ho Yan Yip

IPC分类号： G10H1/02 ,  G10H7/00

CPC分类号： G10H7/105 ,  G10H2250/235 ,  G10H2250/441 ,  G10H2250/471 ,  G10H2250/645

摘要： A method of sound synthesizing in which characteristics of a plurality of harmonics of a sampled sound are first absorbed into a wave-table so that a sound can be synthesized from a reduced number of harmonic envelops for efficient processing while preserving fidelity. This method is particularly good for synthesizing the sound of a string instrument.

摘要翻译： 一种声音合成方法，其中采样声音的多个谐波的特性首先被吸收到波形表中，使得可以从减少数量的谐波包络合成声音，以便有效地处理，同时保持保真度。 这种方法对于合成弦乐器的声音特别好。

公开(公告)号：US20060272487A1

公开(公告)日：2006-12-07

申请号：US10553010

申请日：2004-02-23

申请人： Thomas Lechner

发明人： Thomas Lechner

IPC分类号： G10H7/00

CPC分类号： G10H1/0066 ,  G10H2230/021 ,  G10H2240/251 ,  G10H2250/645

摘要： A method for adapting a score stored in a MIDI file for being reproduced on a mobile terminal to the transfer function of an electroacoustic reproduction circuitry includes test rendering of the score to obtain sampled data prior to a reproduction of the score on the mobile terminal. From these sampled data, one or more values and or combination of values for a desired electroacoustic reproduction on the mobile terminals are identified, and, based on these identified values, one or more parameters suited for adapting the score with respect to the desired or optimised reproduction on the mobile terminal are determined.

摘要翻译： 用于使存储在MIDI文件中的用于在移动终端上再现的乐谱适应于电声再现电路的传送功能的方法包括在移动终端上再现分数之前获得采样数据的分数的测试呈现。 从这些采样数据中，识别在移动终端上所需电声再现的一个或多个值和/或值的组合，并且基于这些识别的值，一个或多个参数适于相对于期望的或优化的 确定移动终端上的再现。

公开(公告)号：US20040211309A1

公开(公告)日：2004-10-28

申请号：US10833148

申请日：2004-04-28

申请人： MediaTek Inc.

发明人： Yu-Cheng Hsieh

IPC分类号： G11C005/00 ,  G10H007/00

CPC分类号： G10H1/46 ,  G10H2250/645 ,  H03G3/3089

摘要： A waveform adjusting system for a music file suitable in hand held devices is described. A music file includes a plurality of tones, and the waveform adjusting system includes a maximum magnitude estimating module and an adjusting module. The waveform adjusting system is capable of analyzing the whole music file, superposing the magnitudes of all the tones, and calculating a scale factor according to the maximum superposed magnitude and a predetermined level. The adjusting module multiplies the magnitude of each tone by the scale factor K, thus the volume of the music is kept to a suitable level without suffering from too small volume problem or signal distortion due to too large volume.

摘要翻译： 描述适用于手持设备的音乐文件的波形调整系统。 音乐文件包括多个音调，并且波形调整系统包括最大幅度估计模块和调整模块。 波形调整系统能够分析整个音乐文件，叠加所有音调的幅度，并根据最大叠加幅度和预定电平计算缩放因子。 调节模块将每个音调的幅度乘以比例因子K，因此音乐的音量保持在合适的水平，而不会因体积过大而造成太小的音量问题或信号失真。