公开(公告)号：EP0700043A3

公开(公告)日：1997-10-15

申请号：EP95113604.3

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10009

摘要： A playback signal is supplied to a delay amplifier and a noise comparator. The delayed playback signal is supplied to a comparator, which compares the delayed playback signal with the playback signal and provides a first comparison signal to a pulse adjustment circuit. The noise comparator compares the playback signal with threshold signals and provides a second comparison signal to the pulse adjustment circuit. The pulse adjustment circuit generates the peak detection signal at each point when the signal level of the first comparison is inverted, and determines the peak detection signal to be invalid when the signal level of the playback signal falls within the range between the threshold signals. A read signal is generated based on the valid peak detection signal.

公开(公告)号：EP0767458A3

公开(公告)日：1998-03-18

申请号：EP96307067.7

申请日：1996-09-27

申请人： AIWA CO., LTD.

发明人： Millerd, Andrew B., Jr. ,  Watanabe, Hiroyuki

IPC分类号： G11B15/52

CPC分类号： G11B15/52

摘要： A method and apparatus for detecting and matching the recorded speed of a previously recorded tape. An algorithm changes the commanded speed to a servo system to a speed that is centered between the speed at which the sector header was written and the sector data was written. In particular, the measured synchronization portion of the sector header is initially integrated with respect to time. The measured synchronization portion of the sector data is then integrated with respect to time. An optimum speed is computed based on the difference in the speeds at which they were recorded. The commanded speed to the servo system is then changed as a result of the previous step.

公开(公告)号：EP0700044A3

公开(公告)日：1997-10-15

申请号：EP95113605.0

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10212 ,  G11B20/1423

摘要： A playback signal played back from a magnetic storage medium is supplied to a pulse width correction block, which converts it into a signal having a predetermined time interval. The signal is transmitted through a first group of shift registers, from which outputs are further transmitted via a correction block through a second group of shift registers. The parallel data outputted from the first group of the shift registers are supplied to a detection block. The detection block provides a signal to a correction block when detecting a signal pattern which causes a peak shift. Within the correction block, the signal is replaced by a signal for which the time interval is corrected in order to correct the peak shift. The corrected signal is supplied to a separator so that a playback digital signal is generated.

摘要翻译： 一种回放信号唇同步的从磁存储介质被提供给一个脉冲宽度修正块，将其转换成具有预定的时间间隔的信号。 的信号通过第一组的移位寄存器的反式mitted，从该输出端通过一第二组的移位寄存器通过校正块进一步反式mitted。 从第一组的移位寄存器的输出的并行数据被提供给一个检测块。 检测块将信号提供给一个校正块当检测引起的峰位移的信号图案。 内的校正块，该信号由其中的时间间隔，以便校正所述峰值偏移校正的信号代替。 校正后的信号被提供到分离器也是如此产生的再现的数字信号。 $$

公开(公告)号：EP0700045A2

公开(公告)日：1996-03-06

申请号：EP95113606.8

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/14

CPC分类号： G11B27/3027 ,  G11B20/1403 ,  H03L7/085 ,  H03L7/181 ,  H04L7/042

摘要： A pulse interval time measurement block receives a synchronizing signal, and a reference clock signal, which reference clock signal is provided from a resistance value control oscillator, and counts the pulse time interval in the synchronizing signal in accordance with the reference clock signal. The count data is latched and supplied to a converter, which generates a resistance value based on the count data. The frequency of the reference clock signal is set to be equal to that of the synchronizing signal multiplied by the predetermined number, based on the resistance value. The latched data is stored until it is updated by the data of the next synchronizing signal. Even when the synchronizing signal is supplied over a short period of time or its cycle is changed, the pulse interval is automatically measured, and it is possible for the frequency of the reference clock signal to be set to be equal to that of the synchronizing signal multiplied by the predetermined number.

公开(公告)号：EP0700043A2

公开(公告)日：1996-03-06

申请号：EP95113604.3

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10009

摘要： A playback signal is supplied to a delay amplifier and a noise comparator. The delayed playback signal is supplied to a comparator, which compares the delayed playback signal with the playback signal and provides a first comparison signal to a pulse adjustment circuit. The noise comparator compares the playback signal with threshold signals and provides a second comparison signal to the pulse adjustment circuit. The pulse adjustment circuit generates the peak detection signal at each point when the signal level of the first comparison is inverted, and determines the peak detection signal to be invalid when the signal level of the playback signal falls within the range between the threshold signals. A read signal is generated based on the valid peak detection signal.

摘要翻译： 回放信号被提供给延迟放大器和噪声比较器。 延迟播放信号被提供给比较器，比较延迟播放信号与重放信号，并向脉冲调节电路提供第一比较信号。 噪声比较器将重放信号与阈值信号进行比较，并向脉冲调整电路提供第二比较信号。 当第一比较的信号电平反相时，脉冲调整电路在每个点产生峰值检测信号，并且当重放信号的信号电平落在阈值信号之间的范围内时，确定峰值检测信号无效。 基于有效峰值检测信号生成读取信号。 $$

公开(公告)号：EP0700045A3

公开(公告)日：1997-10-15

申请号：EP95113606.8

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/14

CPC分类号： G11B27/3027 ,  G11B20/1403 ,  H03L7/085 ,  H03L7/181 ,  H04L7/042

摘要： A pulse interval time measurement block receives a synchronizing signal, and a reference clock signal, which reference clock signal is provided from a resistance value control oscillator, and counts the pulse time interval in the synchronizing signal in accordance with the reference clock signal. The count data is latched and supplied to a converter, which generates a resistance value based on the count data. The frequency of the reference clock signal is set to be equal to that of the synchronizing signal multiplied by the predetermined number, based on the resistance value. The latched data is stored until it is updated by the data of the next synchronizing signal. Even when the synchronizing signal is supplied over a short period of time or its cycle is changed, the pulse interval is automatically measured, and it is possible for the frequency of the reference clock signal to be set to be equal to that of the synchronizing signal multiplied by the predetermined number.

摘要翻译： 脉冲间隔时间测量块接收同步信号和从电阻值控制振荡器提供参考时钟信号的参考时钟信号，并根据参考时钟信号对同步信号中的脉冲时间间隔进行计数。 计数数据被锁存并提供给转换器，该转换器基于计数数据产生电阻值。 基于电阻值将参考时钟信号的频率设置为等于同步信号的频率乘以预定数。 存储的数据被存储，直到它被下一个同步信号的数据更新。 即使当短时间内提供同步信号或其周期被改变时，脉冲间隔被自动测量，并且参考时钟信号的频率可以被设置为等于同步信号的频率 乘以预定数量。 $$

公开(公告)号：EP0767458A2

公开(公告)日：1997-04-09

申请号：EP96307067.7

申请日：1996-09-27

申请人： AIWA CO., LTD.

发明人： Millerd, Andrew B., Jr. ,  Watanabe, Hiroyuki

IPC分类号： G11B15/52

CPC分类号： G11B15/52

摘要： A method and apparatus for detecting and matching the recorded speed of a previously recorded tape. An algorithm changes the commanded speed to a servo system to a speed that is centered between the speed at which the sector header was written and the sector data was written. In particular, the measured synchronization portion of the sector header is initially integrated with respect to time. The measured synchronization portion of the sector data is then integrated with respect to time. An optimum speed is computed based on the difference in the speeds at which they were recorded. The commanded speed to the servo system is then changed as a result of the previous step.

摘要翻译： 一种用于检测和匹配先前记录的磁带的记录速度的方法和装置。 算法改变指令转速伺服系统的速度也被以预先写入扇区头和扇区数据写什么速度之间居中。 特别地，所述区段标题的测量同步部分最初是相对于时间积分。 扇区数据的测量的同步部分，然后相对于时间积分。 最佳速度是基于在哪个theywere记录的速度差计算的。 然后命令的速度伺服系统被改变为前一步骤的结果。

公开(公告)号：EP0700044A2

公开(公告)日：1996-03-06

申请号：EP95113605.0

申请日：1995-08-30

申请人： AIWA CO., LTD.

发明人： Watanabe, Hiroyuki ,  Takarada, Satoshi

IPC分类号： G11B20/10 ,  G11B20/14

CPC分类号： G11B20/10212 ,  G11B20/1423

摘要： A playback signal played back from a magnetic storage medium is supplied to a pulse width correction block, which converts it into a signal having a predetermined time interval. The signal is transmitted through a first group of shift registers, from which outputs are further transmitted via a correction block through a second group of shift registers. The parallel data outputted from the first group of the shift registers are supplied to a detection block. The detection block provides a signal to a correction block when detecting a signal pattern which causes a peak shift. Within the correction block, the signal is replaced by a signal for which the time interval is corrected in order to correct the peak shift. The corrected signal is supplied to a separator so that a playback digital signal is generated.