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    • 1. 发明授权
    • Photo-detector amplifier circuit for optical disk device
    • 用于光盘设备的光电检测放大器电路
    • US07263046B2
    • 2007-08-28
    • US11523017
    • 2006-09-19
    • Takanori OkudaTakashi Yokoyama
    • Takanori OkudaTakashi Yokoyama
    • G11B7/00H01L31/00
    • G11B7/005G11B7/0045G11B7/13
    • A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.
    • 提供了第一级放大器21和第二级放大器22和23的两级放大器。 通过切换反馈电容器Cf 1 w和反馈电阻器Rf 1 w的并联电路以及反馈电容器Cf 1 r的并联电路和反馈电阻器Rf的并联电路,在第一级放大器21中切换写入模式和再现模式 1 r。 第二级放大器23设置有并联连接的反馈电阻器Rf 22和Rf 23。 只有在再现高反射盘时,反馈电阻Rf 23才被开关晶体管QSW连接在反馈回路中。 这使得能够针对写入,低反射盘再现和高反射盘再现中的每一个适当地设置放大器增益。 结果,对于低反射盘可以获得期望的再现特性,同时以大的激光功率容纳高速写入。
    • 3. 发明授权
    • Photo-detector amplifier circuit for optical disk device
    • 用于光盘设备的光电检测放大器电路
    • US07133346B2
    • 2006-11-07
    • US10294573
    • 2002-11-15
    • Takanori OkudaTakashi Yokoyama
    • Takanori OkudaTakashi Yokoyama
    • G11B7/00H01L31/00
    • G11B7/005G11B7/0045G11B7/13
    • A two-stage amplifier of a first-stage amplifier 21 and second-stage amplifiers 22 and 23 is provided. A writing mode and reproducing modes are switched in the first-stage amplifier 21 by switching a parallel circuit of a feedback capacitor Cf1w and a feedback resistor Rf1w and a parallel circuit of a feedback capacitor Cf1r and a feedback resistor Rf1r. The second-stage amplifier 23 is provided with feedback resistors Rf22 and Rf23 that are connected to each other in parallel. The feedback resistor Rf23 is connected in the feedback loop by a switch transistor QSW only when reproducing a high-reflective disk. This enables an amplifier gain to be suitably set for each of writing, low-reflective disk reproducing, and high-reflective disk reproducing. As a result, desirable reproducing characteristics can be obtained for the low-reflective disk while accommodating high-speed writing with a large laser power.
    • 提供了第一级放大器21和第二级放大器22和23的两级放大器。 通过切换反馈电容器Cf 1 w和反馈电阻器Rf 1 w的并联电路以及反馈电容器Cf 1 r的并联电路和反馈电阻器Rf的并联电路,在第一级放大器21中切换写入模式和再现模式 1 r。 第二级放大器23设置有并联连接的反馈电阻器Rf 22和Rf 23。 只有在再现高反射盘时,反馈电阻Rf 23才被开关晶体管QSW连接在反馈回路中。 这使得能够针对写入,低反射盘再现和高反射盘再现中的每一个适当地设置放大器增益。 结果,对于低反射盘可以获得期望的再现特性,同时以大的激光功率容纳高速写入。
    • 8. 发明申请
    • AUDIO RESUME PLAYBACK DEVICE AND AUDIO RESUME PLAYBACK METHOD
    • 音频恢复播放设备和音频恢复播放方法
    • US20110022400A1
    • 2011-01-27
    • US12847701
    • 2010-07-30
    • Yukihiko KIMURATakashi YokoyamaTetsuya Oooka
    • Yukihiko KIMURATakashi YokoyamaTetsuya Oooka
    • G10L19/00G06F17/00
    • G10L19/167
    • An audio playback device includes an interruption-information storage memory which holds frame information at the time of an interruption of playback, a compressed-stream control section which calculates a start position of reading the compressed stream from a recording medium, and reads the compressed stream accordingly, a compressed-stream decode section which decodes the compressed audio stream and transmits decoding information on the frame to the compressed-stream control section as additional resume information, and an output control section which outputs a decoding result. When playback is restarted after an interruption, playback can be restarted without any section not played back in terms of time and without any frequency range not played back, by calculating the start position of reading the compressed stream based on both the additional resume information and the frame information at the time of the interruption, and by reading the compressed stream accordingly.
    • 音频播放装置包括:中断信息存储存储器,其在重放中断时保存帧信息;压缩流控制部分,其计算从记录介质读取压缩流的开始位置,并读取压缩流 因此,压缩流解码部分对压缩音频流进行解码,并将该帧上的解码信息作为附加恢复信息发送到压缩流控制部分,以及输出控制部分,其输出解码结果。 当在中断之后重新开始播放时,可以重新开始播放,而不会在时间上没有播放的部分,而没有任何频率范围不被重放,通过计算基于附加的恢复信息和 在中断时的帧信息,以及相应地读取压缩流。
    • 9. 发明授权
    • Switching center for mobile handover
    • 交换中心用于移动切换
    • US07729699B2
    • 2010-06-01
    • US10846719
    • 2004-05-13
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • Tsutomu KusakiKenichi SakamotoMasaru MurakamiTakashi Yokoyama
    • H04W36/00
    • H04W36/18H04W36/02H04W36/26H04W36/30
    • In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communication, frames are received to be identified by a mobile switching center. The frames contain the same data received from both base stations covering the cell range at asynchronous timing different from each other. A selection is made of header information with the lowest error rate from the header information of these frames. The frames are connected at instructed timing. Also, the frames to be transmitted to a plurality of base stations are duplicated, and then transmission timing is specified from these header information. These duplicated frames are transmitted at the specified transmission timing, so that the non-instantaneous interrupt handover is carried out.
    • 在具有ATM处理传输路径的移动通信系统中,可以实现非瞬时中断切换。 在包括ATM处理的传输路径的移动通信网络中,当移动站在通信期间在小区之间移动时,帧被接收以被移动交换中心识别。 这些帧包含从两个基站接收到的相同数据,这两个基站在异步定时不同的情况下覆盖小区范围。 从这些帧的标题信息中选择具有最低错误率的报头信息。 帧在指定的时间连接。 此外,要发送到多个基站的帧被复制,然后从这些头信息指定发送定时。 这些复制帧在指定的发送定时被发送,从而执行非瞬时中断切换。