公开(公告)号：JPS63100617A

公开(公告)日：1988-05-02

申请号：JP24614386

申请日：1986-10-16

Applicant: SONY CORP

Inventor： OMORI TAKASHI ,  FUJIIE KAZUHIKO

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/007 ,  G11B7/24

Abstract: PURPOSE:To omit a PLL oscillator for extracting a signal by forming an unevenness pattern at the length of three times or above of one period of the channel clock of the signal recorded at a signal recording area succeeding to the unevenness pattern. CONSTITUTION:A magnetic disk 1, for example, is an optical magnetic disk and rotated and driven at a constant linear velocity. On the disk 1, an emboss area 3 composed of an unevenness pattern and a signal recording area 4 are provided at an equal pitch alternately. At the area 3, the unevenness pattern due to three types 3T, 6T and 9T of the rectangular wave signals is recorded. The signal corresponding to the area 3 detected by a photodetector 12 is sent to a length detecting circuit 18 to detect the length of the unevenness pattern through a comparator 16 and the detecting output is sent to a sub-code processing circuit. Since the unevenness pattern is formed by the length of three times or above of one period T of the channel clock, 3T, 6T and 9T can be detected without a detecting error and a PLL oscillator for extracting the signal of the area 3 can be omitted.

公开(公告)号：JPS6172484A

公开(公告)日：1986-04-14

申请号：JP19451384

申请日：1984-09-17

Applicant: Sony Corp

Inventor： ODAKA KENTARO ,  SATAKE TOMOJI ,  SUGIKI HIROSHI ,  YAMADA MAKOTO ,  MIYAMORI SHINJI ,  OMORI TAKASHI

IPC: G11B15/467 ,  H04N5/783

Abstract: PURPOSE: To attain highly accurate tracking control by offsetting for the predetermined quantity from a normal reproduction mode to execute a tracking control in a specific reproduction mode, then giving correctly a predetermined quantity of offset.
CONSTITUTION: In a normal reproduction mode, by detected outputs of pilot signals PB
1 ∼PB
4 from neighboring both tracks 5A
1 , 5A
2 neighboring to a track 5B
1 scanning in plural recording areas, a tracking control is executed. In a specific reproduction time, by a synthetic output of detecting outputs of pilot signals PB
1 , PB
3 from both neighboring tracks 5A
1 , 5A
2 neighboring to a scanning track 5B
1 in one recording area AT
1 , and detecting outputs of pilot signals PB
2 , PB
4 and PA
2 from a track neighboring to a scanning track 5B
1 in the other recording area AT
2 and a scanning track, a tracking control is executed by offsetting by a predetermined quantity from the normal reproduction mode time. Thereby, even if there are bendings of tracks or uneveness in sensitivity of a tape or ahead, a predetermined quantity of offsetting can be given.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了通过从正常再现模式偏移预定量来获得高度精确的跟踪控制，以在特定再现模式中执行跟踪控制，然后正确地给出预定量的偏移量。 构成：在正常再现模式中，通过从在多个记录区域中扫描的轨道5B1相邻的相邻两个轨道5A1,5A2的导频信号PB1-PB4的检测输出执行跟踪控制。 在特定的再现时间，通过合成输出，检测来自与一个记录区域AT1中的扫描轨道5B1相邻的两个相邻轨道5A1,5A2的导频信号PB1，PB3的输出，并且检测从导频信号PB2，PB4和PA2的输出 与其他记录区域AT2中的扫描轨道5B1相邻的轨道和扫描轨道，通过从正常再现模式时间偏移预定量来执行跟踪控制。 因此，即使磁带弯曲或磁带或磁带前端的灵敏度不均匀，也可以给出预定量的偏移量。

公开(公告)号：JPS6150241A

公开(公告)日：1986-03-12

申请号：JP17258684

申请日：1984-08-20

Applicant: Sony Corp

Inventor： ODAKA KENTARO ,  SUGIKI HIROSHI ,  OMURA YOSHIMOTO ,  OMORI TAKASHI ,  YAMADA MAKOTO

IPC: G11B15/467

Abstract: PURPOSE: To attain tracking control with excellent rotary head accuracy and to simplify the circuit constitution of variable speed reproduction by applying the tracking control at a prescribed potential when a positioning signal is not detected at a prescribed section and an error of a PCM signal is larger than a specified amount.
CONSTITUTION: When a sampling pulse SP
2 from a sampling pulse generating circuit 44 is measured by a measuring circuit 51 and a positioning signal is detected at a prescribed section with a normal detection number, a switch circuit 25 is thrown to the position of a contact (a), and the tracking control signal from a sample-and-hold cirlcuit 24 is led at an output terminal 26. That is, the normal tracking control is attained. When the positioning signal is not detected at a prescribed section and the quantity of error of the PCM signal measured by a measuring circuit 58 is larger than the maximum value of correctable error quantity, the switch circuit 25 is thrown to the position of a contact (b), a signal from a terminal 61 having a prescribed potential VCC is fed to a capstan servo system from the output terminal 26 to attain normal tracking.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了获得良好的旋转头精度的跟踪控制，并且通过在规定的部分未检测到定位信号并且PCM信号的误差较大时通过将跟踪控制应用于规定的电位来简化变速再现的电路结构 超过指定的金额。 构成：当通过测量电路51测量来自采样脉冲发生电路44的采样脉冲SP2，并且在具有正常检测数的规定部分检测定位信号时，将开关电路25投入到触点的位置 a），并且来自采样保持电路24的跟踪控制信号在输出端子26被引导。也就是说，获得了正常跟踪控制。 当在规定的部分没有检测到定位信号，并且由测量电路58测量的PCM信号的误差量大于可修正误差量的最大值时，将切换电路25抛到接触位置 b），来自具有规定电位VCC的端子61的信号从输出端子26馈送到主导轴伺服系统，以实现正常跟踪。

公开(公告)号：JPS6142768A

公开(公告)日：1986-03-01

申请号：JP16465384

申请日：1984-08-06

Applicant: Sony Corp

Inventor： ODAKA KENTARO ,  SUGIKI HIROSHI ,  OMURA YOSHIMOTO ,  OMORI TAKASHI ,  YAMADA MAKOTO

IPC: G11B5/588 ,  G11B5/592 ,  G11B15/467

CPC classification number: G11B5/5921

Abstract: PURPOSE: To attain interchangeability mutually between different devices by recording a positioning signal having a different frequency at adjacent tracks and different recording length between tracks to the same frequency and detecting a pilot signal based on the beginning of the positioning signal at reproduction.
CONSTITUTION: Signals S
2 , S
1 are fed to a delay circuit 21 and a frequency divider 21' corresponding to a pulse PG from a pulse generator 17 representing the turning phase of rotary heads 1A, 1B at recording and a tracking pilot signal P, positioning signals S and T and an erasure signal E
0 are outputted via an OR circuit 14. An output of the circuit 14 is fed to the heads 1A, 1B and recorded at a recording area different from that of the digital signal in the lengthwise direction of each track of a magnetic tape 2. A pilot signal is fed to an envelope detection circuit 29 via BPF 28, 34, 35 at reproduction and positioning signals S
10 , S
10 are extracted. The output of the circuit 29 is processed based on the start of the signals S
10 , S
11 to control the amount of movement of the tape so as to provide the interchangeability mutually between different devices.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过在相邻轨道上记录具有不同频率的定位信号和将轨道之间的不同记录长度记录到相同频率，通过再现时基于定位信号的开始来检测导频信号，来实现不同设备之间相互的互换。 构成：信号S2，S1被馈送到延迟电路21和对应于脉冲发生器17的脉冲PG的分频器21'，脉冲发生器17表示旋转磁头1A，1B在记录时的转动相位和跟踪导频信号P，定位信号 S和T以及擦除信号E0经由OR电路14输出。电路14的输出被馈送到头1A，1B并记录在与每个轨道的长度方向上的数字信号的记录区不同的记录区 在再现时，经由BPF 28,34,35将导频信号馈送到包络检测电路29，并提取定位信号S10，S10。 基于信号S10，S11的开始来处理电路29的输出，以控制带的移动量，从而在不同的装置之间提供互换性。

公开(公告)号：JPS6126956A

公开(公告)日：1986-02-06

申请号：JP14741284

申请日：1984-07-16

Applicant: Sony Corp

Inventor： YAMADA MAKOTO ,  SUGIKI HIROSHI ,  OMORI TAKASHI

IPC: G11B20/10 ,  G11B15/467

Abstract: PURPOSE: To reduce the misdetection of tracking error signals by leading out a genuine positioning signal in case the positioning signals exists within a fixed section in the number equal to a prescribed number of waves and producing a sampling pulse according to the initiation of said positioning signal.
CONSTITUTION: The pilot signal reproduced out of a magnetic tape 2 is supplied to the BPF20 and 29 via a switch circuit 19. The erasion signal SE extracted out of the BPF29 is supplied via a waveform shaping circuit 30 to a deciding circuit 60 that decides a genuine positioning signal according to a fact whether or not the signals S
22 exist within a fixed period in the number equal to the number of prescribed pulses. Then the outputs of the circuit 60, a rise detecting circuit 31 and a mode setting circuit 32 are supplied to a pulse selector 63 respectively. The selector 36 controls a pulse generating circuit 43 and a sampling pulse generating circuit 44. Thus it is possible to avoid the misdetection of the tracking control signals delivered from a terminal 26 even in case a false signal emerges at the output side of the circuit 30 owing to an artificial signal contained in a PCM signal.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了减少跟踪误差信号的错误检测，当定位信号存在于等于规定波数的固定区间内时，通过引出正确的定位信号，并根据所述定位信号的启动产生采样脉冲 。 构成：从磁带2再现的导频信号通过开关电路19提供给BPF20和29.从BPF29提取的擦除信号SE经由波形整形电路30提供给决定电路60 根据事实信号S22是否存在于等于规定脉冲数的数量的固定周期内的真正定位信号。 然后，电路60的输出，上升检测电路31和模式设定电路32分别提供给脉冲选择器63。 选择器36控制脉冲发生电路43和采样脉冲发生电路44.因此，即使在电路30的输出侧出现假信号的情况下，也可以避免从端子26发送的跟踪控制信号的错误检测 由于包含在PCM信号中的人造信号。

公开(公告)号：JPS6124058A

公开(公告)日：1986-02-01

申请号：JP14407084

申请日：1984-07-11

Applicant: Sony Corp

Inventor： OMORI TAKASHI ,  ODAKA KENTARO

IPC: H04N5/08 ,  G11B15/467 ,  G11B20/10 ,  H04N5/92 ,  H04N5/93

CPC classification number: G11B20/10

Abstract: PURPOSE:To detect surely a synchronizing signal by integrating an output of a rotary head, comparing this integration output with a reference value and obtaining a digital signal of a prescribed level. CONSTITUTION:A signal fed to a switch circuit 19 from amplifiers 18A, 18B is integrated by an equalizer 60, the integrated signal is fed to a comparator 61, where the signal is compared with a reference value and converted into a digital signal. The comparator 61 acts like generating an output signal of a prescribed level to the output side independently of the inputted signal level. A signal SE of a prescribed level is obtained always at the output side of a band pass filter 29 through which an output of the comparator 61 is passed. The signal SE is fed to a waveform shaping circuit 30, compared with the reference value, a signal S22, that is, a synchronizing signal is obtained. Thus, the setting of the reference potential at the waveform shaping circuit 30 is very easy.

Abstract translation: 目的：通过对旋转头的输出进行积分来确定同步信号，将该积分输出与参考值进行比较，并获得规定水平的数字信号。 构成：从放大器18A，18B馈送到开关电路19的信号由均衡器60积分，积分信号被馈送到比较器61，比较器61将信号与参考值进行比较并转换为数字信号。 比较器61的作用就是与输入信号电平无关地向输出侧产生规定电平的输出信号。 总是在比较器61的输出通过的带通滤波器29的输出侧获得规定电平的信号SE。 信号SE被馈送到波形整形电路30，与参考值相比，获得信号S22，即同步信号。 因此，波形整形电路30的基准电位的设定非常容易。