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公开(公告)号：US5068661A
公开(公告)日：1991-11-26
申请号：US244047
申请日：1988-09-13
申请人： Tetsuhiko Kaneaki , Kozo Nuriya , Yasunori Tani
发明人： Tetsuhiko Kaneaki , Kozo Nuriya , Yasunori Tani
CPC分类号： H03M3/418
摘要： A noise shaping quantization D/A converter in which an input digital signal is supplied to a single-integration sigma delta modulation circuit having quantization levels which include zero level, with a quantization error signal from the single-integration circuit being supplied to a double-integration noise shaping quantization circuit having quantization levels which also include zero level, and an output signal from the double-integration circuit being differentiated and summed with the single-integration circuit output to obtain a bit-compressed digital signal for D/A conversion. Offset of the analog output signal during a zero hold status of the input digital signal is eliminated, and increased efficiency of supply voltage utilization is attained, together with increased S/N ratio.
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公开(公告)号：US4536853A
公开(公告)日：1985-08-20
申请号：US434709
申请日：1982-10-15
CPC分类号： G06F1/0356 , G06F2101/04
摘要： A multiple wave generator for an electronic musical instrument which has a wave data memory storing plural data samples of a wave shape, a wave address register storing wave address data partially designating sampled data in the wave data memory, a difference address register storing difference address data which specifies incremental address amount, a wave address calculator adding the wave address data to the difference address data and writing into the wave address register, the summed address data being separated into wave memory address data and partial address data, and a wave calculator. The wave memory address data, which are part of the wave address data, are applied to the wave data memory for reading out one data sample, and the one data sample and the partial address data are applied to the wave calculator for calculating interpolated wave sample data corresponding to the wave memory address and the partial address.
摘要翻译： 一种用于电子乐器的多波发生器，其具有存储多个波形数据样本的波形数据存储器，存储波形数据存储器中部分指定采样数据的波形地址数据的波形地址寄存器，存储差分地址数据的差分地址寄存器 其指定增量地址量，波形地址计算器将波形地址数据添加到差分地址数据并写入波形地址寄存器，将合并的地址数据分成波形存储器地址数据和部分地址数据，以及波形计算器。 作为波形地址数据的一部分的波形存储器地址数据被应用于波形数据存储器，用于读出一个数据样本，并且将一个数据样本和部分地址数据应用于用于计算内插波样本的波形计算器 数据对应于波形存储器地址和部分地址。
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公开(公告)号：US5210709A
公开(公告)日：1993-05-11
申请号：US875176
申请日：1992-04-28
申请人： Yasunori Tani , Tetsuhiko Kaneaki , Akira Sobajima
发明人： Yasunori Tani , Tetsuhiko Kaneaki , Akira Sobajima
IPC分类号： H03H17/02
CPC分类号： H03H17/0219
摘要： An offset reducer includes an adder for adding an input signal and an offset cancel signal to reduce an offset component of the input signal. A converter serves to measure a difference between a sum of past periods during which an output signal of the adder was positive and a sum of past periods during which the output signal of the adder was negative. The converter outputs an offset detection signal of a given value which depends on a sign of the measured difference when an absolute value of the measured difference exceeds a given difference. The converter initializes the measured difference to a given initial difference when the offset detection signal is outputted. An integrator serves to accumulate the offset detection signal outputted from the converter. The integrator generates the offset cancel signal in accordance with a result of the accumulating the offset detection signal. The output signal of the adder constitutes an offset-free signal corresponding to the input signal.
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公开(公告)号：US5006851A
公开(公告)日：1991-04-09
申请号：US380355
申请日：1989-07-17
申请人： Tetsuhiko Kaneaki , Mikio Oda , Kozo Nuriya , Yasunori Tani
发明人： Tetsuhiko Kaneaki , Mikio Oda , Kozo Nuriya , Yasunori Tani
IPC分类号： H03M1/18
CPC分类号： H03M1/188
摘要： A first analog input signal is converted into a plurality of second analog signals having different levels respectively. The second analog signals are inputted into respective analog-to-digital converters. Values of output signals from the respective converters are adjusted in accordance with the values of the output signals from the respective converters to convert the output signals from the respective converters into respective adjusted signals. One of the adjusted signals is selected in accordance with the values of the output signals from the respective converters. The selected signal is produced as a system output signal.
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公开(公告)号：US4380184A
公开(公告)日：1983-04-19
申请号：US254152
申请日：1981-04-14
摘要： An electronic musical instrument has a generator assigner for supplying note data and octave data by key stroke entry, a top octave synthesizer for generating 12 of the highest pitch signals for each note, a circuit for selecting one highest pitch signal from the 12 highest pitch signals according to note data, a binary counter for dividing one highest pitch signal to produce several pitch signals, and circuits for selecting one pitch signal out of several pitch signals obtained by the binary counter. The circuits are further controlled by both octave data and note data to generate octave series tone signals and non-octave series tone signals such as quint series tone signals.
摘要翻译： 电子乐器具有用于通过按键笔划输入提供音符数据和倍频程数据的发生器分配器，用于为每个音符产生12个最高音调信号的最高倍频程合成器，用于从12个最高音调信号中选择一个最高音调信号的电路 根据音符数据，用于分割一个最高音调信号以产生若干音调信号的二进制计数器，以及用于从通过二进制计数器获得的多个音调信号中选择一个音调信号的电路。 这些电路由八度数据和音符数据进一步控制，以产生八度音阶信号和非八倍音系列音调信号，例如五音系列音调信号。
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公开(公告)号：US07802311B2
公开(公告)日：2010-09-21
申请号：US10541997
申请日：2004-01-14
申请人： Kenji Muraki , Tetsuhiko Kaneaki
发明人： Kenji Muraki , Tetsuhiko Kaneaki
IPC分类号： G06F21/24
CPC分类号： G06F21/10 , G11B20/00086 , G11B20/00884 , H04N5/913 , H04N2005/91335
摘要： A recording apparatus which executes copy control utilizing copy control information which is indicative of plural types of copy control includes an electronic watermark detection device, which detects a predetermined copy control information portion of the copy control information out of a content over which an electronic watermark expressing the copy control information is superimposed, and a recording device which records a content in accordance with a detection result obtained by the electronic watermark detection device.
摘要翻译： 利用表示多种复制控制的复制控制信息执行复制控制的记录装置包括：电子水印检测装置，其从表达的电子水印的内容检测复制控制信息的预定复制控制信息部分， 叠加复制控制信息，以及根据由电子水印检测装置获得的检测结果记录内容的记录装置。
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公开(公告)号：US20060146604A1
公开(公告)日：2006-07-06
申请号：US10541997
申请日：2004-01-14
申请人： Kenji Muraki , Tetsuhiko Kaneaki
发明人： Kenji Muraki , Tetsuhiko Kaneaki
IPC分类号： G11C16/04
CPC分类号： G06F21/10 , G11B20/00086 , G11B20/00884 , H04N5/913 , H04N2005/91335
摘要： A recording apparatus which executes copy control utilizing copy control information which is indicative of plural types of copy control includes an electronic watermark detection device, which detects a predetermined copy control information portion of the copy control information out of a content over which an electronic watermark expressing the copy control information is superimposed, and a recording device which records a content in accordance with a detection result obtained by the electronic watermark detection device.
摘要翻译： 利用表示多种复制控制的复制控制信息执行复制控制的记录装置包括：电子水印检测装置，其从表达的电子水印的内容检测复制控制信息的预定复制控制信息部分， 叠加复制控制信息，以及根据由电子水印检测装置获得的检测结果记录内容的记录装置。
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公开(公告)号：US5539403A
公开(公告)日：1996-07-23
申请号：US185876
申请日：1994-06-06
CPC分类号： H03M1/0663 , H03M1/682 , H03M1/74 , H03M3/464 , H03M3/502 , H03M7/3022
摘要： It purposes to provide a D/A conversion apparatus of a high accuracy oversampling method by noise shaping which is not needed a high frequency clock or accurate working, and a high accuracy A/D conversion apparatus having a configuration to which said D/A conversion technology is applied. It has configuration outputting the digital signal by dividing to plural 1-bit D/A converters, and by using said D/A converters so as to circulate, correlation of the signal and the output value of a specified 1-bit D/A converter is canceled, and noise or distortion due to a relative error of the 1-bit D/A converter is reduced.
摘要翻译： PCT No.PCT / JP93 / 00717 Sec。 371日期1994年1月6日 102（e）日期1994年1月6日PCT提交1993年5月28日PCT公布。 公开号WO93 / 25006 日期为1993年12月9日为了提供高精度过采样方法的D / A转换装置，其不需要高频时钟或精确工作的噪声整形，以及具有以下结构的高精度A / D转换装置： 表示应用D / A转换技术。 它具有通过分配多个1位D / A转换器来输出数字信号的配置，并且通过使用所述D / A转换器来循环信号与指定的1位D / A转换器的输出值的相关性 被消除，并且由于1位D / A转换器的相对误差引起的噪声或失真减少。
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公开(公告)号：US5124703A
公开(公告)日：1992-06-23
申请号：US680668
申请日：1991-04-05
CPC分类号： H03M7/3022 , H03M7/3042
摘要： In a digital signal noise shaping requantization circuit formed of a first delta-sigma quantizer (main loop) for executing noise shaping of an input digital signal and a second delta-sigma quantizer (sub-loop) which receives as input signal the quantization error of a local quantizer in the first delta-sigma quantizer, and whose output signal is differentiated and added to the output signal from the first delta-sigma quantizer, the second delta-sigma quantizer includes a feedback circuit for operating on a quantization error of a local quantizer therein, with a predetermined transfer function. The output signal from the feedback circuit, in addition to being fed back to the input of the second delta-sigma quantizer, is also applied to control the operation of the first delta-sigma quantizer such as to modify the value of quantization error of the local quantizer of the first delta-sigma quantizer, for thereby ensuring stable and effective operation of the second delta-sigma quantizer even when the input digital signal attains a high amplitude.
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公开(公告)号：US4709611A
公开(公告)日：1987-12-01
申请号：US841110
申请日：1986-03-18
CPC分类号： G10H7/04 , G10H1/0575 , G10H2250/545
摘要： An electronic musical instrument includes a first waveform memory for storing a waveform corresponding to an attack portion of a musical tone and one period of a steady waveform produced after the attack, a second waveform memory for storing one period of a waveform different from the contents of the first waveform memory, a waveform reader which reads out the first and second waveform from the first and second waveform memory, respectively, and an envelope generator which generates two separate envelope signals. The first waveform including the attack portion of the musical tone and the periodic second waveform are multiplied by the separate envelope signals, respectively, and then the products of the multiplication are added together. The sum of the products is provided as an output. Thus, the electronic musical instrument is capable of precisely simulating the attack portions of musical tones of a natural musical instrument and generating musical tone signals having a steady part vividly simulating the musical tones of the natural musical instrument.
摘要翻译： 电子乐器包括：第一波形存储器，用于存储对应于音调的攻击部分的波形和在攻击之后产生的稳定波形的一个周期的波形;第二波形存储器，用于存储与内容不同的波形的一个周期 第一波形存储器，分别从第一和第二波形存储器读出第一和第二波形的波形读取器以及产生两个分离的包络信号的包络发生器。 包括音调的攻击部分和周期性第二波形的第一波形分别乘以分离的包络信号，然后将乘法的乘积相加。 产品的总和作为输出提供。 因此，电子乐器能够精确地模拟自然乐器的乐音的攻击部分，并且生成具有生动地模拟自然乐器的乐音的稳定部分的乐音信号。
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