公开(公告)号：US6031802A

公开(公告)日：2000-02-29

申请号：US5511

申请日：1998-01-12

申请人： Chong Yeop Park ,  Chang Woo Nam ,  Jong Jun Lee

发明人： Chong Yeop Park ,  Chang Woo Nam ,  Jong Jun Lee

IPC分类号： G11B7/0037 ,  G11B7/085 ,  G11B19/12 ,  G11B3/90

CPC分类号： G11B19/12 ,  G11B7/0037 ,  G11B7/08505

摘要： An improved data writing density judging apparatus and method for a disc capable of judging a writing density of a disc by detecting an amount of cross talk or detecting a tracking error signal. Cross talk is detected when a disc track is scanned by a beam. A tracking error signal is detected when a pick-up member jumps a certain track while the pick-up member moves across a disc track. The improved apparatus and method computes a ratio between a minimum value and a maximum value of an envelope signal based on the detected amount of cross talk a writing density can be determined. The improved apparatus and method also converts a tracking error signal which is a high frequency analog signal into a digital signal that is used to compute a time required for a pick-up member to jump a certain track. Based on the computed time which is compared with a reference value, a writing density of a disk can also be determined.

摘要翻译： 一种用于盘的改进的数据写入密度判断装置和方法，其能够通过检测串扰量或检测跟踪误差信号来判断盘的写入密度。 当光束被光束扫描时，检测到交谈。 当拾取构件在拾取构件移动穿过盘轨道时跳过某个轨道时，检测到跟踪误差信号。 改进的装置和方法基于检测到的串扰量可以确定包络信号的最小值和最大值之间的比率来确定书写密度。 改进的装置和方法还将作为高频模拟信号的跟踪误差信号转换为数字信号，该数字信号用于计算拾取构件跳跃某个轨道所需的时间。 基于与参考值进行比较的计算时间，也可以确定盘的写入密度。

公开(公告)号：US5774438A

公开(公告)日：1998-06-30

申请号：US550652

申请日：1995-10-31

申请人： Chong Yeop Park ,  Chang Woo Nam ,  Jong Jun Lee

发明人： Chong Yeop Park ,  Chang Woo Nam ,  Jong Jun Lee

IPC分类号： G11B7/0037 ,  G11B7/085 ,  G11B19/12 ,  G11B3/90

CPC分类号： G11B19/12 ,  G11B7/0037 ,  G11B7/08505

摘要： An improved data writing density judging apparatus and method for a disc capable of judging a writing density of a disc by detecting an amount of cross talk or detecting a tracking error signal. Cross talk is detected when a disc track is scanned by a beam. A tracking error signal is detected when a pick-up member jumps a certain track while the pick-up member moves across a disc track. The improved apparatus and method computes a ratio between a minimum value and a maximum value of an envelope signal based on the detected amount of cross talk a writing density can be determined. The improved apparatus and method also converts a tracking error signal which is a high frequency analog signal into a digital signal that is used to compute a time required for a pick-up member to jump a certain track. Based on the computed time which is compared with a reference value, a writing density of a disk can also be determined.

摘要翻译： 一种用于盘的改进的数据写入密度判断装置和方法，其能够通过检测串扰量或检测跟踪误差信号来判断盘的写入密度。 当光束被光束扫描时，检测到交谈。 当拾取构件在拾取构件移动穿过盘轨道时跳过某个轨道时，检测到跟踪误差信号。 改进的装置和方法基于检测到的串扰量可以确定包络信号的最小值和最大值之间的比率来确定书写密度。 改进的装置和方法还将作为高频模拟信号的跟踪误差信号转换为数字信号，该数字信号用于计算拾取构件跳跃某个轨道所需的时间。 基于与参考值进行比较的计算时间，也可以确定盘的写入密度。