公开(公告)号：US4916449A

公开(公告)日：1990-04-10

申请号：US118261

申请日：1987-11-09

申请人： Mitsumasa Kubo ,  Tetsuro Araki

发明人： Mitsumasa Kubo ,  Tetsuro Araki

IPC分类号： H03M1/06 ,  H03M1/66

CPC分类号： H03M1/0641 ,  H03M1/66

摘要： A method and apparatus well suited for the conversion of a digitized audio signal into analog form with as wide a dynamic range as possible. A digital dither signal is added to a digital audio or like data signal to provide a digital data/dither signal. This digital data/dither signal and the digital dither signal are both converted into an analog data/dither signal and an analog dither signal respectively, and the analog dither signal is subtracted from the analog data/dither signal to obtain an analog data signal equivalent to the digital data signal. The level of the incoming digital data signal may be so high that when the digital dither signal is added thereto, the total level of the data/dither signal may exceed the capacity of the digital to analog converter in use. In that case the digital dither signal is either gated off or reduced in level, with the result that the digital to analog converter inputs either the data signal only or the data/dither signal having a total level not exceeding its capacity.

摘要翻译： 一种非常适合将数字化音频信号转换成模拟形式并具有尽可能宽的动态范围的方法和装置。 将数字抖动信号添加到数字音频或类似数据信号以提供数字数据/抖动信号。 该数字数据/抖动信号和数字抖动信号分别转换为模拟数据/抖动信号和模拟抖动信号，并从模拟数据/抖动信号中减去模拟抖动信号，以获得等效于 数字数据信号。 输入数字数据信号的电平可能会很高，当加上数字抖动信号时，数据/抖动信号的总电平可能超过使用中的数模转换器的容量。 在这种情况下，数字抖动信号被选通或降低电平，结果是数模转换器仅输入数据信号或数据/抖动信号的总电平不超过其容量。

公开(公告)号：US4751496A

公开(公告)日：1988-06-14

申请号：US881389

申请日：1986-07-02

申请人： Tetsuro Araki ,  Mitsumasa Kubo

发明人： Tetsuro Araki ,  Mitsumasa Kubo

IPC分类号： H03M1/20 ,  H03M1/00

CPC分类号： H03M1/0854 ,  H03M1/0639

摘要： A method and apparatus well suited for digitizing an audio signal with as wide a dynamic range as possible. An analog dither signal is added to an analog audio or like data signal to provide an analog data/dither signal. This analog data/dither signal and the analog dither signal are both converted into a digital data/dither signal and a digital dither signal respectively, and the digital dither signal is subsequently subtracted from the digital data/dither signal to obtain a digital data signal equivalent to the analog data signal. The magnitude of the incoming analog data signal may be so high that when the analog dither signal is added thereto, the magnitude of the resulting data/dither signal may exceed the capacity of the analog to digital converter in use. In that case the analog dither signal is either gated off or reduced in magnitude, with the result that the analog to digital converter inputs either the data signal only or the data/dither signal having a magnitude not exceeding its capacity.

摘要翻译： 一种非常适合于尽可能广泛的动态范围对音频信号进行数字化的方法和装置。 将模拟抖动信号添加到模拟音频或类似数据信号以提供模拟数据/抖动信号。 该模拟数据/抖动信号和模拟抖动信号分别被转换为数字数据/抖动信号和数字抖动信号，并且数字抖动信号随后从数字数据/抖动信号中减去以获得等效的数字数据信号 到模拟数据信号。 输入的模拟数据信号的大小可能非常高，以致当将模拟抖动信号加到其上时，所得到的数据/抖动信号的幅度可能会超过使用中的模数转换器的容量。 在这种情况下，模拟抖动信号被门控或幅度减小，结果是模数转换器仅输入数据信号或数据/抖动信号的幅度不超过其容量。

公开(公告)号：US4845498A

公开(公告)日：1989-07-04

申请号：US232562

申请日：1988-08-12

申请人： Mitsumasa Kubo ,  Tetsuro Araki

发明人： Mitsumasa Kubo ,  Tetsuro Araki

IPC分类号： H03M1/06 ,  H03M1/66

CPC分类号： H03M1/0641 ,  H03M1/66

摘要： A method and apparatus well suited for the conversion of a digitized audio signal into analog form with as wide a dynamic range as possible. A digital dither signal is added to a digital audio or like data signal to provide a digital data/dither signal. This digital data/dither signal and the digital dither signal are both converted into an analog data/dither signal and an analog dither signal respectively, and the analog dither signal is subtracted from the analog data/dither signal to obtain an analog data signal equivalent to the digital data signal. The level of the incoming digital data signal may be so high that when the digital dither signal is added thereto, the total level of the data/dither signal may exceed the capacity of the digital to analog converter in use. In that case the digital dither signal is either gated off or reduced in level, with the result that the digital to analog converter inputs either the data signal only or the data/dither signal having a total level not exceeding its capacity.

摘要翻译： 一种非常适合将数字化音频信号转换成模拟形式并具有尽可能宽的动态范围的方法和装置。 将数字抖动信号添加到数字音频或类似数据信号以提供数字数据/抖动信号。 该数字数据/抖动信号和数字抖动信号分别转换为模拟数据/抖动信号和模拟抖动信号，并从模拟数据/抖动信号中减去模拟抖动信号，以获得等效于 数字数据信号。 输入数字数据信号的电平可能会很高，当加上数字抖动信号时，数据/抖动信号的总电平可能超过使用中的数模转换器的容量。 在这种情况下，数字抖动信号被选通或降低电平，结果是数模转换器仅输入数据信号或数据/抖动信号的总电平不超过其容量。

公开(公告)号：US4110670A

公开(公告)日：1978-08-29

申请号：US798343

申请日：1977-05-19

申请人： Tetsuro Araki ,  Hideaki Hayashi

发明人： Tetsuro Araki ,  Hideaki Hayashi

IPC分类号： H02P3/18 ,  B60T13/74 ,  G11B15/22 ,  G11B15/50 ,  G11B19/22 ,  H02K7/102 ,  H02K7/106 ,  H02P3/24 ,  D01H7/22

CPC分类号： H02K7/1023 ,  G11B15/22 ,  G11B15/50 ,  G11B19/22 ,  H02K7/106 ,  H02P3/24 ,  Y10T477/87

摘要： A brake apparatus is disclosed in which a rotary shaft coupled to a load to be rotated is rotatably supported by a plain bearing and a biasing device is located near the shaft to bias or move the shaft to the biasing device to applying braking force to the rotating load by the friction between the shaft and its bearing so as to stop the rotation of shaft and hence load.

摘要翻译： 公开了一种制动装置，其中联接到待旋转的负载的旋转轴由滑动轴承可旋转地支撑，并且偏置装置位于轴附近，以将轴偏置或移动到偏置装置，以将旋转的制动力施加到旋转 通过轴与其轴承之间的摩擦来承受负载，以便阻止轴的旋转并因此阻止负载。

公开(公告)号：US4686509A

公开(公告)日：1987-08-11

申请号：US810975

申请日：1985-12-19

申请人： Tetsuro Araki ,  Hiroyuki Onda

发明人： Tetsuro Araki ,  Hiroyuki Onda

IPC分类号： H03M1/20 ,  H03M1/00 ,  H03M1/66

CPC分类号： H03M1/0641

摘要： A digital data signal such as a digitized audio signal is time division multiplexed with a digital dither signal to provide a multiplex signal compound of the digital dither signal and a digital data/dither signal, the latter being an addition of the digital data and dither signals. Then the multiplex signal is converted from digital to analog form by one and the same digital to analog converter. The subsequent removal of the analog dither signal from the analog data/dither signal provides an analog data signal as a replica of the digital data signal. The use of the same converter for the conversion of both dither signal and data/dither signal from digital to analog form makes possible the maximum possible removal of the dither from the analog data/dither signal.

摘要翻译： 诸如数字化音频信号的数字数据信号与数字抖动信号进行时分复用，以提供数字抖动信号和数字数据/抖动信号的多路复用信号混合，后者是数字数据和抖动信号的相加 。 然后，多路复用信号由数字模拟转换为同一个数模转换器。 随后从模拟数据/抖动信号中去除模拟抖动信号提供模拟数据信号作为数字数据信号的副本。 使用相同的转换器将抖动信号和数据/抖动信号从数字模式转换为模拟形式使得可以从模拟数据/抖动信号中最大程度地去除抖动。

公开(公告)号：US5442608A

公开(公告)日：1995-08-15

申请号：US206900

申请日：1994-03-04

申请人： Yoshiaki Umeda ,  Teruo Furukawa ,  Masaharu Ogawa ,  Kazuhiko Nakane ,  Akira Mashimo ,  Tetsuro Araki ,  Hiroyuki Onda ,  Yoshiaki Sakai ,  Hiroshi Tsuyuguchi ,  Katsuya Enami

发明人： Yoshiaki Umeda ,  Teruo Furukawa ,  Masaharu Ogawa ,  Kazuhiko Nakane ,  Akira Mashimo ,  Tetsuro Araki ,  Hiroyuki Onda ,  Yoshiaki Sakai ,  Hiroshi Tsuyuguchi ,  Katsuya Enami

IPC分类号： G11B19/00 ,  G11B7/0037 ,  G11B11/105 ,  G11B19/16 ,  G11B7/00

CPC分类号： G11B19/00 ,  G11B11/10595 ,  G11B7/0037

摘要： A disk apparatus comprising a controller receiving commands from a command input device and controlling an entire operation of the disk apparatus. The rotating control function is coupled to the controller for controlling the first motor. The pickupmotor control function is coupled to the controller for controlling the second motor. The pickup control function is coupled to the controller for controlling a focusing operation and a tracking operation of the pickup. And the signal processing function is coupled to the controller for processing a recording signal to be recorded on the disk-shaped recording medium and a reproduced signal read out therefrom. The controller is comprised function-stop function for determining whether or not any command is received from the command input device during a predetermined period of time in a state. The disk apparatus is maintained in a predetermined mode and for stopping predetermined function among the rotating control function, the pickup motor control function, the pickup control function, and the signal processing function when it is determined that no command is received from the command input device during the predetermined period.

摘要翻译： 一种盘装置，包括控制器，从命令输入装置接收命令并控制盘装置的整个操作。 旋转控制功能耦合到控制器以控制第一电动机。 拾取电机控制功能耦合到控制器以控制第二电动机。 拾取控制功能耦合到控制器，用于控制拾取器的聚焦操作和跟踪操作。 并且信号处理功能被耦合到控制器，用于处理要记录在盘形记录介质上的记录信号和从其读出的再现信号。 控制器包括功能停止功能，用于在一个状态下的预定时间段内确定是否从命令输入设备接收到任何命令。 当确定没有从命令输入装置接收到命令时，盘装置被保持在预定模式并用于在旋转控制功能，拾取马达控制功能，拾取控制功能和信号处理功能之间停止预定功能 在预定期间。

公开(公告)号：US4700173A

公开(公告)日：1987-10-13

申请号：US810973

申请日：1985-12-19

申请人： Tetsuro Araki ,  Hiroyuki Onda

发明人： Tetsuro Araki ,  Hiroyuki Onda

IPC分类号： H03M1/08 ,  H03M1/00 ,  H03M1/20

CPC分类号： H03M1/0641

摘要： For the distortionless conversion of an audio or like data signal from analog to digital form as by pulse code modulation, the input data signal is time division multiplexed with an analog dither (white noise) signal to provide a multiplex signal composed of the analog dither signal and an analog data/dither signal, the latter being an addition of the analog data and dither signals. Then the multiplex signal is converted from analog to digital form by one and the same analog to digital converter. The subsequent removal of the digital dither component from the digital data/dither signal provides a digital data signal as a replica of the input analog data signal. The use of the same converter for the conversion of both dither signal and data/dither signal from analog to digital form makes possible the maximum possible removal of the dither from the digital data/dither signal.

摘要翻译： 为了通过脉码调制将音频或类似数据信号从模拟到数字形式进行无失真转换，输入数据信号与模拟抖动（白噪声）信号进行时分复用，以提供由模拟抖动信号 以及模拟数据/抖动信号，后者是模拟数据和抖动信号的相加。 然后，多路复用信号由模数转换为数模转换器。 随后从数字数据/抖动信号中去除数字抖动分量提供数字数据信号作为输入模拟数据信号的副本。 使用相同的转换器将抖动信号和数据/抖动信号从模拟信号转换为数字形式使得可能从数字数据/抖动信号中最大程度地去除抖动。

公开(公告)号：US4644324A

公开(公告)日：1987-02-17

申请号：US810974

申请日：1985-12-19

申请人： Tetsuro Araki ,  Hiroyuki Onda

发明人： Tetsuro Araki ,  Hiroyuki Onda

IPC分类号： H03M1/20 ,  H03M1/00 ,  H03M1/04 ,  H03M1/66

CPC分类号： H03M1/201

摘要： A system for converting an audio or like data signal from digital to analog form, with the addition of dither (white noise) to the digital input, with or without the subsequent removal of the dither from the analog output, for the reduction of quantization noise. Included is a network of n adders, equal in number to the n bits of the coded data signal, for adding in bit parallel form the digital data signal and the digital dither signal. Generated by an analog dither generator, the dither signal is transformed by an analog to digital converter into an m bit coded digital output, m being less than n, prior to delivery to the adder network. Some, preferably all, of the m bits of the digital dither signal are each added to, for example, two different ones of the n bits of the digital data signal so that, for instance, an eight bits analog to digital converter can be used for the provision of a digital dither signal to be added to a 16 bits digital audio signal. The adder network is connected to a digital to analog converter for converting the bit parallel addition of the data and dither signals into analog form.

摘要翻译： 一种用于将音频或类似数据信号从数字形式转换成模拟形式的系统，在数字输入端添加抖动（白噪声），伴随或不用随后从模拟输出中去除抖动，以减少量化噪声 。 包括与编码数据信号的n位数相等的n个加法器的网络，用于以数字数据信号和数字抖动信号的位并行形式相加。 由模拟抖动发生器产生的抖动信号由模拟数字转换器转换成m位编码的数字输出，m小于n，然后传送到加法器网络。 数字抖动信号的m位中的一些，优选地，全部每一个都被添加到例如数字数据信号的n位中的两个不同的位，使得例如可以使用8位模数转换器 用于提供要添加到16位数字音频信号的数字抖动信号。 加法器网络连接到数模转换器，用于将数据和抖动信号的位并行加法转换为模拟形式。