摘要:
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
摘要:
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recoded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
摘要:
In a magnetic recording medium to detect tracking error signals optically where an optical head and a magnetic head scan different tracks, two signals having phases different by .pi./2 are generated and added or subtracted. By changing the amplitude of the two signals with a changeable gain amplifying means, a phase of a tracking error signal is changed so that the servo operation is conducted at the middle of the amplitude of the tracking error signal to keep the magnetic head on track.
摘要:
ID codes are given individually to each reproducing apparatus. An information carrier has a subsidiary storing area for recording reproduction-management-information (RMI) and ID codes can be registered in this area. When the ID code is registered, the reproducing apparatus is permitted to reproduce main information from the information carrier. When a reproducing apparatus with an unregistered ID code tries to reproduce the main information, the ID code of the reproducing apparatus itself is registered in the RMI of the information carrier and the main information is reproduced. The number of ID codes for permitting registration in the RMI is limited. When the area for registering the ID code is fully occupied, the main information cannot be reproduced by reproducing apparatuses that have unregistered ID codes. When the reproducing apparatus digitally copies the main information reproduced from the information carrier where the ID code of the reproducing apparatus is registered, the ID code of the reproducing apparatus is registered in the information carrier of the copy destination. An initializing apparatus for initializing the RMI in the information carrier accumulates the total number of ID codes registrable in the RMIs of the information carriers initialized by the initializing apparatus.
摘要:
A multi-layer optical disk includes a plurality of recording layers and each recording layer is composed of a first layer and a second layer having respective transmission indices of T1A and T2A with respect to a disk irradiation beam intensity A and having respective transmission indices of T1B and T2B with respect to a disk irradiation beam intensity B such that T1A.times.T2A=T1B.times.T2B. The interval between one recording layer and another recording layer is at least 10 times as long as a wavelength of an optical source providing the disk irradiation beams. Furthermore, the first and second layers may have respective thicknesses of H1 and H2 and respective refractive indices of N1A and N2A with respect to a disk irradiation beam intensity A and have respective refractive indices of N1B and N2B with respect to an irradiation beam intensity B such that N1A.times.H1+N2A.times.H2=N1B.times.H1+N2B.times.H2.
摘要:
A data reproduction apparatus includes a PR-equalizing circuit which equalizes data reproduction signals recorded on a recording medium based on a partial response system and produces output signals, a binary code circuit which changes output signals from the PR-equalizing circuit into binary signals, a clock generation circuit which generates clock signals synchronized to the edges of the binary signals, A/D converters which sample the output signals from the PR-equalizing circuit based on the clock signal and generates sample data, decoding circuits which decode the sample data based on a predetermined ideal amplitude value and generates reproduced data, and a synthesis circuit which synthesizes reproduced data from the decoding circuits. A second data reproduction apparatus includes an equalizing circuit which equalizes wave pattern reproduction signals by a partial response method, a binary code circuit which changes the wave pattern equalized reproduction signals into binary coded signals, a PLL circuit which generates clock signals synchronized with the edges of the binary coded signals, coding circuits which transform the wave pattern equalized reproduction signals into binary signals by the clock signals from the PLL circuits, and a synthesis circuit which synthesizes the binary signals from the coding circuits.
摘要翻译:数据再现装置包括PR均衡电路,其均衡基于部分响应系统记录在记录介质上的数据再现信号并产生输出信号;将来自PR均衡电路的输出信号改变成二进制信号的二进制码电路, 时钟生成电路,其生成与二进制信号的边沿同步的时钟信号; A / D转换器,其基于时钟信号对来自PR均衡电路的输出信号进行采样,并生成采样数据;解码电路,其基于 预定的理想振幅值并产生再现数据,以及合成电路,其合成来自解码电路的再现数据。 第二数据再现装置包括:均衡电路,其通过部分响应方法对波形图形再现信号进行均衡;二进制码电路,其将波形图形均衡的再现信号改变成二进制编码信号; PLL电路,生成与边缘同步的时钟信号 二进制编码信号,通过来自PLL电路的时钟信号将波形图案将再现信号变换为二进制信号的编码电路,以及从编码电路合成二进制信号的合成电路。
摘要:
A sheet processing apparatus operating in xerographic printing apparatus employs a single-component magnetic toner. The inventive features of the sheet processing apparatus are directed toward smooth transportation and discharge of printing sheets sent through the printing apparatus, across a sheet transport guide, and through an image fixing and sheet transporting unit which finally discharges the printing sheets. Conductivity of the transport guide is selected by the material of which it is made, specified herein to have superficial resistivity in the range of ten thousand to one hundred million megohms. Charge applied to a printing sheet to electrostatically attract the magnetic toner during the xerographic printing is thus drained by the transport guide gradually enough not to disturb the adhesion of the toner to the sheet, yet rapidly enough to prevent the sheet from being curled upward by electrostatic attraction toward a residual toner container just over the downstream end of the guide, in the optimally compacted arrangement of the various components of the sheet processing and xerographic printing apparatus into a facsimile machine or the like.
摘要:
A multi-layer optical disk includes a plurality of recording layers and each recording layer is composed of a first layer and a second layer having respective transmission indices of T1A and T2A with respect to a disk irradiation beam intensity A and having respective transmission indices of T1B and T2B with respect to a disk irradiation beam intensity B such that T1A.times.T2A =T1B.times.T2B. The interval between one recording layer and another recording layer is at least 10 times as long as a wavelength of an optical source providing the disk irradiation beams. Furthermore, the first and second layers may have respective thicknesses of H1 and H2 and respective refractive indices of N1A and N2A with respect to a disk irradiation beam intensity A and have respective refractive indices of N1B and N2B with respect to an irradiation beam intensity B such that N1A.times.H1+N2A.times.H2=N1B.times.H1+N2B.times.H2.
摘要:
An automatic transmission includes a hydraulic control circuit for developing coupling pressure to the friction coupling member, the hydraulic control circuit having a regulator device for regulating the coupling pressure and a solenoid valve for controlling the regulator device, a hydraulic pressure sensor device for detecting hydraulic pressure in connection with the coupling pressure, an actuator device for actuating the solenoid valve in a range between the opening position and the closing position to change the control amount of the solenoid valve when the vehicle is in a predetermined state, a memory device for storing a characteristic relationship between detected hydraulic pressures and changed control amounts, and a control device for controlling the solenoid valve based on the characteristic relationship so that the regulator device regulates the coupling pressure to a desired value. This automatic transmission compensates a variation in characteristic relationship between the control amount of the solenoid valve and the coupling pressure, and assures more accurate open control.
摘要:
A digital modulator converts M-bit data words to N-bit code words (N>M) each containing a specific number of bits `1`. The specific number is one of a plurality of predetermined numbers which are different by at least 3 from one another. A specific data word may be converted to either one of two code words having different numbers of bits `1` from each other so as to reduce DC components of a channel code constituted by the code words.