专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06999394B2 Optical disc playback apparatus 失效
标题翻译：光盘播放装置
公开(公告)号：US06999394B2
公开(公告)日：2006-02-14
申请号：US10196381
申请日：2002-07-17
申请人： Kouichi Urita , Youichi Ogura , Shinichiro Sato
发明人： Kouichi Urita , Youichi Ogura , Shinichiro Sato
IPC分类号： G11B7/00
CPC分类号： G11B20/10425 , G11B7/005 , G11B7/00718 , G11B20/10009 , G11B20/10046 , G11B20/18
摘要： An optical disc playback apparatus that performs appropriate waveform equalization according to a difference in characteristics of reproduced signals between land parts and groove parts in an optical disc to which high-density recording is performed using a land/groove recording method. The optical disc playback apparatus includes a reproduction device, an A/D conversion circuit for sampling a reproduced signal to be converted into a multi-bit digital signal, a filter for subjecting the multi-bit digital signal to digital equalization, a filter coefficient learning device for adaptively controlling filter coefficients for the filter corresponding to the land part and the groove part to minimize an equalization error, and a switch signal generation device for generating a signal for switching between land and groove, thereby changing the filter coefficient adaptively to the land or the groove.
摘要翻译：一种光盘播放装置，其根据在使用陆/沟记录方法进行高密度记录的光盘中的陆部和凹槽部分之间的再现信号的特性差异执行适当的波形均衡。光盘播放装置包括再现装置，用于对要转换成多位数字信号的再现信号进行采样的A / D转换电路，用于对多位数字信号进行数字均衡的滤波器，滤波器系数学习用于自适应地控制对应于岸台部分和槽部分的滤波器的滤波器系数以最小化均衡误差的装置，以及用于产生用于在陆地和凹槽之间切换的信号的开关信号产生装置，从而自适应地改变滤波器系数或凹槽。

2. 发明授权

US07274645B2 Reproduction signal processing apparatus and optical disc player including the same 失效
标题翻译：再现信号处理装置和包括其的光盘播放器
公开(公告)号：US07274645B2
公开(公告)日：2007-09-25
申请号：US10862361
申请日：2004-06-08
申请人： Kouichi Urita
发明人： Kouichi Urita
IPC分类号： G11B7/00
CPC分类号： G11B20/10046 , G11B7/005 , G11B20/10009 , G11B20/10425 , G11B20/1403
摘要： A reproduction signal processing apparatus includes: a reproduction unit, an A/D converter for sampling a reproduction signal to obtain a multi-bit digital signal, a phase-locked loop controller for outputting a reproduction clock that is in phase with clock components included in the reproduction signal from an oscillator, a frequency divider for frequency-dividing the reproduction clock, an operation clock switching unit for selecting an operation clock, a filter for performing digital equalization, a filter coefficient learning unit for adaptively controlling the filter coefficients to minimize an equalization error, and an equalization error correcting unit for performing correction so as not to output an abnormal equalization error, thereby performing the adaptive equalization control with stability not only in the channel rate mode but also in the half rate mode that is introduced to suppress the power consumption.
摘要翻译：再现信号处理装置包括：再现单元，用于对再现信号进行取样以获得多位数字信号的A / D转换器;锁相环控制器，用于输出与包含在其中的时钟分量同相的再现时钟来自振荡器的再现信号，用于分频再现时钟的分频器，用于选择操作时钟的操作时钟切换单元，用于执行数字均衡的滤波器，滤波器系数学习单元，用于自适应地控制滤波器系数以最小化均衡误差和均衡误差校正单元，用于执行校正，以便不输出异常均衡误差，从而不仅在信道速率模式下而且在引入的抑制率的半速率模式中也执行自适应均衡控制能量消耗。

3. 发明申请

US20050002306A1 Reproduction signal processing apparatus and optical disc player including the same 失效
标题翻译：再现信号处理装置和包括其的光盘播放器
公开(公告)号：US20050002306A1
公开(公告)日：2005-01-06
申请号：US10862361
申请日：2004-06-08
申请人： Kouichi Urita
发明人： Kouichi Urita
IPC分类号： G11B7/005 , G11B20/10 , G11B20/14 , G11B5/09
CPC分类号： G11B20/10046 , G11B7/005 , G11B20/10009 , G11B20/10425 , G11B20/1403
摘要： A reproduction signal processing apparatus includes: a reproduction means, an A/D converter for sampling a reproduction signal to obtain a multi-bit digital signal, a phase-locked loop control means for outputting a reproduction clock that is in phase with clock components included in the reproduction signal from an oscillator, a frequency divider for frequency-dividing the reproduction clock, an operation clock switching means for selecting an operation clock, a filter for performing digital equalization, a filter coefficient learning means for adaptively controlling the filter coefficients to minimize an equalization error, and an equalization error correcting means for performing correction so as not to output an abnormal equalization error, thereby performing the adaptive equalization control with stability not only in the channel rate mode but also in the half rate mode that is introduced to suppress the power consumption.
摘要翻译：再现信号处理装置包括：再现装置，用于对再现信号进行取样以获得多位数字信号的A / D转换器;锁相环控制装置，用于输出与包括的时钟分量同相的再现时钟来自振荡器的再现信号，用于分频再现时钟的分频器，用于选择操作时钟的操作时钟切换装置，用于执行数字均衡的滤波器，滤波器系数学习装置，用于自适应地控制滤波器系数以最小化均衡误差和均衡误差校正装置，用于执行校正，以便不输出异常均衡误差，从而不仅在信道速率模式下而且在引入抑制的半速率模式中也执行自适应均衡控制功耗。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式