-
公开(公告)号：US6073746A
公开(公告)日：2000-06-13
申请号：US666948
申请日：1996-06-20
申请人： Akio Oshiro , Koji Niimi , Tomomi Nakamura , Ryousuke Sakamaki , Masanori Oishi
发明人： Akio Oshiro , Koji Niimi , Tomomi Nakamura , Ryousuke Sakamaki , Masanori Oishi
CPC分类号： H02K15/00 , B23Q7/06 , B23Q7/08 , H02K7/1166
摘要： An assembled part for being placed on a conveyor frame having a pair of guides along a direction of conveyance, being located between an upstream delivery member and a downstream positioning member and being conveyed and guided through the movement of them as one body, which includes a main body, a pair of guided portions facing the guides, a delivered portion facing the delivery member, a positioned portion facing the positioning member.
摘要翻译： 一种组装部件，用于放置在具有沿着输送方向的一对引导件的输送机框架上，位于上游输送构件和下游定位构件之间，并且通过它们作为一个主体的运动被输送和引导，其包括 主体，面向引导件的一对引导部分，面向传送部件的传送部分，面向定位部件的定位部分。
-
2.发明授权Digital to analog conversion apparatus and method with cross-fading between new and old data 失效数字到模拟转换装置和新旧数据之间具有交叉衰落的方法公开(公告)号：US06362764B1
公开(公告)日：2002-03-26
申请号：US09619960
申请日：2000-07-20
申请人： Koji Niimi , Ryuuji Wakatsuki , Kiyoto Kuroiwa
发明人： Koji Niimi , Ryuuji Wakatsuki , Kiyoto Kuroiwa
IPC分类号： H03M106
CPC分类号： H03M1/70
摘要： Most appropriate data of a plurality of level-converted digital data obtained by level conversion of the same input digital data by different conversion factors is selected based on a signal quality of each level-converted digital data. The other level-converted digital data is attenuated to or below a predetermined noise level. Switching between previously selected data and newly selected data is effected by cross-fading. The level-converted digital data are D/A converted to respective analog signals. Level conversion of the analog signals are carried out again based on respective corresponding ones of the conversion factors to restore a level of the input digital data, and all the level-converted analog signals are then added together. When an amplitude level of the input digital data exceeds a predetermined value, the cross-fading is started between the previously selected data and the newly selected data which are delayed by the predetermined amount of delay, and when during the cross-fading a larger rate of change in the amplitude level of the input digital data than a predetermined value is detected, the cross-fading is carried out at a rate larger than a predetermined rate in dependence on the rate of change in the amplitude level. In another form, the cross-fading is started at a first rate when the amplitude level exceeds a first predetermined value, and when during the cross-fading the amplitude level exceeds a second predetermined value larger than the first one, the cross-fading is carried out at a second rate larger than the first rate.
摘要翻译： 基于每个电平转换的数字数据的信号质量来选择通过不同的转换因子对相同的输入数字数据进行电平转换而获得的多个电平转换数字数据的最合适的数据。 其他电平转换的数字数据被衰减到或低于预定的噪声电平。 先前选择的数据与新选择的数据之间的切换是通过交叉衰落来实现的。 电平转换的数字数据被D / A转换为相应的模拟信号。 基于相应的相应转换因子再次执行模拟信号的电平转换，以恢复输入数字数据的电平，然后将所有电平转换的模拟信号相加在一起。 当输入数字数据的幅度电平超过预定值时，在先前选择的数据和延迟了预定延迟量的新选择的数据之间开始交叉衰落，并且当在褪色期间较大的速率 检测到输入数字数据的振幅电平的变化超过预定值，则以相对于振幅电平的变化率的速率大于预定速率的速度进行交叉衰落。 在另一种形式中，当幅度电平超过第一预定值时，以第一速率开始交叉衰落，并且当在交叉衰落期间，幅度电平超过大于第一预定值的第二预定值时，交叉衰落为 以比第一速率大的第二速率进行。
-
公开(公告)号：US4246823A
公开(公告)日：1981-01-27
申请号：US955523
申请日：1978-10-30
申请人： Masatada Wachi , Mitsumi Katoh , Koji Niimi
发明人： Masatada Wachi , Mitsumi Katoh , Koji Niimi
CPC分类号： G10H7/10 , G10H7/08 , G10H2250/205 , G10H2250/621 , G10H2250/631
摘要： In a wave shape generator of the memory reading type, a waveshape memory stores sample values of a wave each value being represented by an integral address. A coefficient memory stores coefficients for nth order interpolation. Unknown intermediate sample values not stored in the wave shape memory represented by non-integral addresses and are approximated by multiplication of stored sample values of the waveshape and corresponding coefficient values on the basis of nth order interpolation. Use of the interpolation method assures smoothness of the wave shape with respect to time and thereby minimizes quantization noise while permitting use of relatively small memories.
摘要翻译： 在存储器读取类型的波形发生器中，波形存储器存储波形的每个值的采样值由积分地址表示。 系数存储器存储用于n次插值的系数。 未存储在由非积分地址表示的波形存储器中的未知中间采样值，并且通过基于n次插值的波形和对应系数值的存储采样值的乘法来近似。 使用内插方法确保波形相对于时间的平滑度，从而使量化噪声最小化，同时允许使用相对较小的存储器。
-
公开(公告)号：US4587620A
公开(公告)日：1986-05-06
申请号：US373437
申请日：1982-04-30
申请人： Koji Niimi , Takayasu Kondo
发明人： Koji Niimi , Takayasu Kondo
CPC分类号： G10L21/0208 , H03H21/00 , H04B14/046
摘要： A noise elimination device employs a concept of the linear prediction method. According to the invention, a linear prediction coefficient of a digitized, continuous input signal (an original signal) is calculated, a linear predicted value is computed from this linear prediction coefficient, difference (a prediction error) between the linear predicted value and the input signal is computed whereas a threshold value is set in accordance with the momentarily changing input signal, the judgement that a noise has occurred is made when the predicted value has exceeded the threshold value and thereupon a substitution signal is produced on the basis of an input signal existing in the vicinity of the time point at which the noise has occurred, and the section in which the noise has occurred is substituted by this substitution signal thereby to eliminate the noise. By virtue of employing the linear prediction method, the necessity for including an error detection code as a part of data has been obviated, the device is made applicable to elimination of a noise contained in an original signal, possibility of making an erroneous judgement has been reduced even with respect to signals having little correlation between themselves by varying the threshold value in accordance with the input signal, and a sufficient noise suppression effect is expected against a burst error or a relatively long noise by producing a substitution signal resembling an input signal on the basis of the input signal containing no noise in the vicinity of the noise section.
摘要翻译： 噪声消除装置采用线性预测方法的概念。 根据本发明，计算数字化的连续输入信号（原始信号）的线性预测系数，根据该线性预测系数计算线性预测值，线性预测值与输入之间的差（预测误差） 信号被计算，而根据瞬时变化的输入信号设置阈值，当预测值已经超过阈值并且随后基于输入信号产生替代信号时，发生噪声已经发生的判断 存在于已经发生噪声的时间点附近，并且已经发生噪声的部分被该替代信号代替，从而消除噪声。 通过采用线性预测方法，已经消除了将错误检测码作为数据的一部分包括在内的必要性，该装置适用于消除原始信号中包含的噪声，可能发生错误判断 通过根据输入信号改变阈值，相对于其自身之间几乎没有相关性的信号减小，并且通过产生类似于输入信号的替代信号来预测针对突发错误或相对长的噪声的足够的噪声抑制效果 在噪声部分附近不包含噪声的输入信号的基础。
-
公开(公告)号：USRE30834E
公开(公告)日：1981-12-29
申请号：US154767
申请日：1980-05-30
申请人： Koji Niimi , Mitsumi Kato
发明人： Koji Niimi , Mitsumi Kato
摘要： The musical instrument is of a waveform memory device read out type and comprises a frequency information generator for generating a plurality of sets of frequency informations each set consisting of a subplurality of frequency informations and corresponding to each of the tone pitches of the depressed keys in a keyboard, a selector for selecting one, at a time and one after another, of the subplurality of frequency informations generated by the frequency information generator for each one key depressed, an accumulator for repeatedly accumulating the frequency information selected by the selector to produce an increasing accumulated value, a waveform memory device for storing the amplitude values at successive sampling points in one period of a sine wave utilized to form a desired musical waveform, a comparator for comparing the accumulated value with a preset value and controlling the selecting operation of the selector during the operation of the accumulator. The increasing accumulated value is used to address the waveform memory device to read out therefrom amplitude samples to form a desired musical tone wave form. The output of the waveform memory means is imparted with a volume envelope generated by an envelope waveform generator and then produced as a performance tone by a sound system.
-
公开(公告)号：US4133241A
公开(公告)日：1979-01-09
申请号：US689867
申请日：1976-05-25
申请人： Koji Niimi , Michiaki Kumaoka , Takashi Yamada
发明人： Koji Niimi , Michiaki Kumaoka , Takashi Yamada
CPC分类号： G10H7/12 , G10H2230/185 , G10H2230/195
摘要： Musical tone signals are produced in an electronic musical instrument by calculating the amplitudes at successive sample points of a complex waveshape and by delivering these calculated amplitudes one after another in time sequence. A recursive algorithm is implemented to calculate each amplitude, using one or more sets of parameters and also the calculated amplitudes for a plurality of the preceding sample points. This musical instrument can produce a variety of musical sounds which realistically simulate those of the various existing natural musical instruments including percussion instruments, simply by suitably determining the parameters.
摘要翻译： 在电子乐器中通过计算复波形的连续采样点处的振幅，并按时间顺序递送这些计算的振幅，产生乐音信号。 使用递归算法来计算每个振幅，使用一组或多组参数以及多个先前采样点的计算幅度。 该乐器可以简单地通过适当地确定参数来产生各种音乐声音，其实际上模拟了包括打击乐器在内的各种现有的自然乐器的音乐声音。
-
公开(公告)号：US07925008B2
公开(公告)日：2011-04-12
申请号：US11825301
申请日：2007-07-05
申请人： Toru Hirai , Mikio Tohyama , Hiraku Okumura , Yoshikazu Honji , Hiroshi Iriyama , Koji Niimi
发明人： Toru Hirai , Mikio Tohyama , Hiraku Okumura , Yoshikazu Honji , Hiroshi Iriyama , Koji Niimi
IPC分类号： H04M9/08
摘要： Stereo sound signals are reproduced directly from loudspeakers (SP(L), SP(R)). By using a sum signal and a difference signal of the stereo sound signals as a reference signal, and according to a cross spectrum calculation of the reference signal with a microphone-collected sound signal, calculation is performed to obtain transfer functions of four sound transfer systems between the loudspeakers (SP(L), SP(R)) and microphones (MC(L), MC(R)). The transfer functions obtained are subjected to inverse Fourier transform to obtain impulse responses, which are set in filter means (40-1 to 40-4) to create echo cancel signals and perform echo canceling. This solves the problem of an indefinite coefficient in the echo cancel technique of a multi-channel sound signal.
-
8.发明授权Multi-channel echo cancel method, multi-channel sound transfer method, stereo echo canceller, stereo sound transfer apparatus and transfer function calculation apparatus 有权多声道回声消除法，多声道声音传输法，立体声回波消除器，立体声传输装置及传递函数计算装置公开(公告)号：US07403609B2
公开(公告)日：2008-07-22
申请号：US10705794
申请日：2003-11-07
申请人： Toru Hirai , Mikio Tohyama , Hiraku Okumura , Yoshikazu Honji , Hiroshi Iriyama , Koji Niimi
发明人： Toru Hirai , Mikio Tohyama , Hiraku Okumura , Yoshikazu Honji , Hiroshi Iriyama , Koji Niimi
IPC分类号： H04M9/08
摘要： Stereo sound signals are reproduced directly from loudspeakers (SP(L), SP(R)). By using a sum signal and a difference signal of the stereo sound signals as a reference signal, and according to a cross spectrum calculation of the reference signal with a microphone-collected sound signal, calculation is performed to obtain transfer functions of four sound transfer systems between the loudspeakers (SP(L), SP(R)) and microphones (MC(L), MC(R)). The transfer functions obtained are subjected to inverse Fourier transform to obtain impulse responses, which are set in filter means (40-1 to 40-4) to create echo cancel signals and perform echo canceling. This solves the problem of an indefinite coefficient in the echo cancel technique of a multi-channel sound signal.
摘要翻译： 立体声信号直接从扬声器（SP（L），SP（R））再现。 通过使用立体声信号的和信号和差分信号作为参考信号，并且根据具有麦克风收集的声音信号的参考信号的交叉频谱计算，执行计算以获得四个声音传送系统的传递函数 扬声器（SP（L），SP（R））和麦克风（MC（L），MC（R））之间。 所获得的传递函数进行傅里叶逆变换以获得脉冲响应，其被设置在滤波器装置（40-1至40-4）中以产生回波消除信号并执行回波消除。 这解决了多声道声音信号的回波消除技术中不确定系数的问题。
-
公开(公告)号：USRE31004E
公开(公告)日：1982-08-03
申请号：US230348
申请日：1981-01-30
申请人： Koji Niimi
发明人： Koji Niimi
CPC分类号： G10H7/006
摘要： A CPU of a computer, or preferably a so-called microprocessor controls the tone waveshape generation. A tone generator unit, an instrument keyboard unit, a tone quality control unit are connected to a common data bus to which the CPU and the associated memories are also connected. Thus, the tone generator unit may be considered as a terminal unit of a computer system. Hence, the freedom in selecting the algorithm for generating a waveshape and the freedom in selecting and changing the parameters related to the waveshape generation are substantially increased. And therefore a gradually changing waveshape is very easily generated in one embodiment of this invention.
-
公开(公告)号：US4223582A
公开(公告)日：1980-09-23
申请号：US953440
申请日：1978-10-23
申请人： Mitsumi Kato , Koji Niimi
发明人： Mitsumi Kato , Koji Niimi
CPC分类号： G10H7/06
摘要： In an electronic musical instrument wherein a frequency information related to the tone pitch of a depressed key is repeatedly accumulated and the progressing accumulated value is used to designate the addresses of a waveform memory device storing the waveform of a desired musical tone, the frequency information is varied with time instantaneously so as to vary the speed of addressing the waveform memory and thereby to vary the waveform read out from the waveform memory device, thus changing the color of the produced musical tone.
摘要翻译： 在电子乐器中，与被按压的琴键相关的频率信息被重复累加，并且使用累加值来指定存储所需乐音的波形的波形存储装置的地址，频率信息是 随时间随时间变化，从而改变寻址波形存储器的速度，从而改变从波形存储器件读出的波形，从而改变所产生的乐音的颜色。
-
-
-
-
-
-
-
-
-
搜索结果
26 条记录 (耗时 0.036 秒)
