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1.发明公开
公开(公告)号：EP0300581A3
公开(公告)日：1989-04-12
申请号：EP88201565.4
申请日：1985-01-14
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/005 , G11B20/1426 , G11B20/1879 , G11B27/36
摘要： Provided is a read signal offset during write verify which prevents the false detection of amorphous pips from an optical disk recorder. Amorphous pips are the signals caused by the drop in reflection from an optical disk after the laser has caused the surface material to change from its crystalline state to an amorphous state, but not to a hole. When a hole is not formed in the material, the amorphous material later recrystallizes, the drop in reflection no longer occurs and information is lost.
摘要翻译： 用于对固定块编码数据进行差分解码的装置，包括：其中记录有多个符号的数据的介质，每个符号具有正常媒体状态的预定数量的符号位置，并且还具有只有至少一个预定位置的子集 第二媒体状态的一个位置; 用于从所述介质读取数据并产生对应于所述媒体状态的读取信号的装置; 用于对符号内的符号位置进行计数的符号计数器（46），包括用于在达到符号的最后符号位置的计数之后初始化符号计数器的装置（122,124）; 至少两个采样和保持单元（114）响应于所读取的信号; 响应于符号计数器（46）的定时电路（44），用于在符号的第一预定符号位置处触发采样和保持单元（114）中的第一个并且响应于所述符号计数器（46）触发第二个 所述采样和保持单元（114）具有第二预定符号位置，所述第二符号位置在具有在一个位置处的所述第二状态的介质的符号位置的所述至少一个子集内; 比较器（116），用于将所述第一和第二采样和保持单元信号值彼此进行比较，并用于确定和指示两者中的哪一个较大; 响应于符号计数器（46）和比较器（116）的装置（118），用于保持包含在具有较大值的采样和保持单元（114）中的读取信号，并用于触发下一个采样和保持单元 子集内的符号位置，其可以具有所述第二状态的媒体，并且用于在可能具有所述第二状态的媒体的子集内的每个后续符号位置的出现时重复所述保留和所述触发具有最低值的采样和保持信元 ; 以及用于从比较器的状态确定具有所述第二状态的介质的子集位置的位置的装置（120）。
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公开(公告)号：EP0091200B1
公开(公告)日：1988-06-29
申请号：EP83301170.3
申请日：1983-03-04
IPC分类号： G06F1/04
CPC分类号： G11B20/1403 , H03L7/085 , H04L7/033
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公开(公告)号：EP0266841A1
公开(公告)日：1988-05-11
申请号：EP87202112.6
申请日：1987-11-04
IPC分类号： G11B7/135
CPC分类号： G11B7/1353
摘要： An optical data recording device for focusing a laser beam (52) on a recording medium (60) for storing and reading out information therefrom. The device is characterized by using a high efficiency holographic grating (30) as a polarization beam splitter. In a forward collimated light path the holographic grating diffracts a light beam from a laser (54) on an objective lens. The beam is reflected from the surface towards the recording medium (60) and transmitted through the grating onto a light detector (64). The grating (30) further provides for correcting a typical elliptical light beam shape from the laser (54) to a circular beam shape as well as for correcting the astigmatism typically found in the wave fronts emitting from a laser diode.
摘要翻译： 一种用于将激光束（52）聚焦在用于存储和读出信息的记录介质（60）上的光学数据记录装置。 该器件的特征在于使用高效全息光栅（30）作为偏振分束器。 在正向准直光路中，全息光栅衍射来自物镜上的激光（54）的光束。 光束从表面朝向记录介质（60）反射，并通过光栅传输到光检测器（64）上。 光栅（30）进一步提供用于校正从激光器（54）到圆形波束形状的典型的椭圆形光束形状，以及用于校正通常在从激光二极管发射的波前发现的像散。
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公开(公告)号：EP0147090A3
公开(公告)日：1987-10-07
申请号：EP84308400
申请日：1984-12-04
CPC分类号： G11B20/1426 , G11B7/013
摘要： A high density code comprises holes made in an optical medium to represent one state and the absence of a hole represents the complementary state and having a null in the frequency spectrum upon recording or reading whereby the optical medium may include a pre-recorded clock signal for assisting in the writing and reading of the data. The high density code comprises a symbol having nine positions equally spaced within the symbol for encoding eight binary bits of data; a constraint that exactly two holes and only two holes appear within each symbol, a constraint that for each hole appearing in an even position, there appears a hole at an odd position, a constraint that the ninth position never has a hole, and a constraint that at least two positions appear between adjacent holes or between adjacent holes and groups of holes or between adjacent groups of holes.
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公开(公告)号：EP0147041A2
公开(公告)日：1985-07-03
申请号：EP84307709.0
申请日：1984-11-08
发明人： Fritze, Keith Robert
CPC分类号： H03M13/151
摘要： A Reed-Solomon error correcting apparatus is programmable to perform several distinct error correction functions, namely, encoding, error detection, syndrome generation, burst error trapping, and Chien searching. The apparatus essentially comprises a set of two t registers (30) where t is the number of errors to be corrected, a set of two t exclusive-OR gates (32), a set oftwottop multiplexers (34), a set of two t bottom multiplexers (36), a first set of two t Galois Field multipliers (S 0 -S 19 ), a second set of two Galois Field multipliers (G 0 -G 19 ), a feedback multiplexer (42), a lead exclusive-OR gate (40), an AND gate (46), t-1 ordered Chien exclusive-OR gates (52) and a controller (12).
摘要翻译： Reed-Solomon误差校正装置可编程以执行几种不同的纠错功能，即编码，错误检测，校正子产生，突发错误捕获和Chien搜索。 该设备基本上包括一组两个t寄存器（30），其中t是要校正的错误的数量，一组两个t异或门（32），一组两个顶部多路复用器（34），一组 的两个t底部多路复用器（36），第一组两个伽罗瓦域乘法器（S0-S19），第二组两个伽罗瓦域乘法器（G0-G19），反馈多路复用器（42），引导异或 门（40），与门（46），t-1有序Chien异或门（52）和控制器（12）。
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公开(公告)号：EP0238260A3
公开(公告)日：1989-06-07
申请号：EP87302139.8
申请日：1987-03-12
发明人： Smith, Jay
IPC分类号： G11B15/67
CPC分类号： G11B15/67
摘要： A transport apparatus for receiving and operating upon a tape cartridge (2) including a web of tape (5) disposed on a supply reel (6) and having a free end (11) engaged by a leader block (10), the said transport apparatus comprising a take-up reel (21) for receiving said leader block (10) and a leader block loading means (20) for loading the leader block (10) in the said take-up reel (21) characterised in that the leader block loading means (20) comprises a linkage (36) for engaging a slot (12) of said leader block (10) and for delivering said engaged leader block (10) to the take-up reel (21), the said leader block loading means (20) being operatively associated with said take-up reel (21).
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7.发明公开Apparatus for using differential data detection in write protection of an optical recorder 失效在光学记录仪的写保护中使用差分数据检测的装置
公开(公告)号：EP0295759A3
公开(公告)日：1989-05-03
申请号：EP88201566.2
申请日：1985-01-14
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/005 , G11B20/1426 , G11B20/1879 , G11B27/36
摘要： Disclosed is an apparatus for detection of write protect data written on an optical disk by simultaneously reading the data during writing using differential detection and disabling further writing if write protect data is present. The write protect data is the same format as other data written on the optical disk and is written as the first byte of data on all data fields. The data is written in a fixed-block format defining a symbol having a predetermined number of symbol positions and a predetermined number of holes which may be written at the symbol positions, an equal number of holes at odd and at even positions. The write protect symbol has holes written at symbol position numbers two and five. During the writing of a write protect symbol, the laser is operated at read power before it is operated at write power and a signal associated with the hole associated power of the reflected beam is sampled at position number eight of the previous symbol and at position number one of the write protect symbol. The hole associated power at position number one will be significant if a hole was previously written at position number two. The read signals at positions one and eight are compared to each other. If the position number one signal exceeds that at number eight by a predetermined differential, a hole was previously recorded at position number two, indicating the presence of a previously written write protect byte of data.
摘要翻译： 用于对固定块编码数据进行差分解码的装置，包括：其中记录有多个符号的数据的介质，每个符号具有正常媒体状态的预定数量的符号位置，并且还具有只有至少一个预定位置的子集 第二媒体状态的一个位置; 用于从所述介质读取数据并产生对应于所述媒体状态的读取信号的装置; 用于对符号内的符号位置进行计数的符号计数器（46），包括用于在达到符号的最后符号位置的计数之后初始化符号计数器的装置（122,124）; 至少两个采样和保持单元（114）响应于所读取的信号; 响应于符号计数器（46）的定时电路（44），用于在符号的第一预定符号位置处触发采样和保持单元（114）中的第一个并且响应于所述符号计数器（46）触发第二个 所述采样和保持单元（114）具有第二预定符号位置，所述第二符号位置在具有在一个位置处的所述第二状态的介质的符号位置的所述至少一个子集内; 比较器（116），用于将所述第一和第二采样和保持单元信号值彼此进行比较，并用于确定和指示两者中的哪一个较大; 响应于符号计数器（46）和比较器（116）的装置（118），用于保持包含在具有较大值的采样和保持单元（114）中的读取信号，并用于触发下一个采样和保持单元 子集内的符号位置，其可以具有所述第二状态的媒体，并且用于在可能具有所述第二状态的媒体的子集内的每个后续符号位置的出现时重复所述保留和所述触发具有最低值的采样和保持信元 ; 以及用于从比较器的状态确定具有所述第二状态的介质的子集位置的位置的装置（120）。
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8.发明公开Amorphous pip protection apparatus for use in an optical recording apparatus 失效Amorphes Pip-Schutzverfahren zur Verwendung在einem optischenAufzeichnungsgerät。
公开(公告)号：EP0300581A2
公开(公告)日：1989-01-25
申请号：EP88201565.4
申请日：1985-01-14
CPC分类号： G11B19/04 , G11B7/0045 , G11B7/005 , G11B20/1426 , G11B20/1879 , G11B27/36
摘要： Provided is a read signal offset during write verify which prevents the false detection of amorphous pips from an optical disk recorder. Amorphous pips are the signals caused by the drop in reflection from an optical disk after the laser has caused the surface material to change from its crystalline state to an amorphous state, but not to a hole. When a hole is not formed in the material, the amorphous material later recrystallizes, the drop in reflection no longer occurs and information is lost.
摘要翻译： 提供了在写入验证期间的读取信号偏移，其防止来自光盘记录器的非法点的错误检测。 非晶点是在激光已经使表面材料从其结晶状态变为非晶状态而不是孔之后由光盘的反射下降引起的信号。 当材料中未形成孔时，无定形材料随后再结晶，反射下降不再发生，信息丢失。
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公开(公告)号：EP0147041A3
公开(公告)日：1988-02-03
申请号：EP84307709
申请日：1984-11-08
发明人： Fritze, Keith Robert
CPC分类号： H03M13/151
摘要： A Reed-Solomon error correcting apparatus is programmable to perform several distinct error correction functions, namely, encoding, error detection, syndrome generation, burst error trapping, and Chien searching. The apparatus essentially comprises a set of two t registers (30) where t is the number of errors to be corrected, a set of two t exclusive-OR gates (32), a set oftwottop multiplexers (34), a set of two t bottom multiplexers (36), a first set of two t Galois Field multipliers (S 0 -S 19 ), a second set of two Galois Field multipliers (G 0 -G 19 ), a feedback multiplexer (42), a lead exclusive-OR gate (40), an AND gate (46), t-1 ordered Chien exclusive-OR gates (52) and a controller (12).
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公开(公告)号：EP0239291A2
公开(公告)日：1987-09-30
申请号：EP87302143.0
申请日：1987-03-12
发明人： Sachuk, Daniel B.
IPC分类号： G11B15/67
CPC分类号： G11B15/67
摘要： There is provided a transport apparatus for receiving and operating upon a tape cartridge (2) including a web of tape (5) disposed on a supply reel (6) and having a free end (11) engaged by a leader block (10). The leader block has an engagment slot (17) open to a rear edge of the tape cartridge, an engagment pin (16) engages the slot of the leader block for delivery of the tape to a take-up reel (21) . The tape path is such that the engagment pin (16) is remote from the rear edge (14) of the tape cartridge (2).
摘要翻译： 提供了一种用于在带盒（2）上接收和操作的输送装置，该带盒（2）包括设置在供带盘（6）上并具有由引导块（10）接合的自由端（11）的带子（5）。 引导块具有通向带盒的后边缘的接合槽（17），接合销（16）接合引导块的槽，以将带传送到卷取卷轴（21）。 带路径使得接合销（16）远离带盒（2）的后边缘（14）。
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