SYNCHRONIZING CIRCUIT
    71.
    发明申请
    SYNCHRONIZING CIRCUIT 审中-公开
    同步电路

    公开(公告)号:WO1985000066A1

    公开(公告)日:1985-01-03

    申请号:PCT/JP1984000307

    申请日:1984-06-13

    Inventor: SONY CORPORATION

    Abstract: A data signal synchronizing circuit in which data signals are divided into groups of a predetermined number of bits, each having a synchronizing signal, any desired address signal and an error detection signal for detecting the error of this address signal, the groups of data signals being adapted to be written in a memory device in accordance with the address signals. The synchronizing circuit has a means (4) for detecting the synchronizing signal and a means (3) for detecting any error in the address signal. The synchronizing circuit further has an internal synchronizing signal generating circuit (6) and an internal address signal generating circuit (10). The internal synchronizing signal generating circuit (6) is driven when the error detecting means (3) detects judges that the address signal is correct so that the internal synchronizing signal generating circuit (6) generates an internal synchronizing signal which drives the internal address signal generating circuit (10). The address signal or the internal address signal is selectively supplied to the memory device (13) depending on whether the address signal is correct or wrong. According to the invention, it is possible to attain the synchronism correctly with a simple circuit arrangement.

    ENCODING AND DECODING SYSTEM FOR BINARY DATA
    73.
    发明申请
    ENCODING AND DECODING SYSTEM FOR BINARY DATA 审中-公开
    二进制数据编码和解码系统

    公开(公告)号:WO1983001141A1

    公开(公告)日:1983-03-31

    申请号:PCT/JP1981000253

    申请日:1981-09-25

    CPC classification number: G11B20/1426

    Abstract: Système de codage pour données binaires adapté notamment à l'enregistrement/reproduction magnétiques dans lequel les valeurs minimum et maximum entre les intervalles d'inversion de magnétisation sont limités de manière à accroître la densité d'enregistrement. Des données à six bits, comprenant des données à quatre bits et les données suivantes à deux bits dans une série de données binaires, sont converties en un code à neuf bits après la conversion selon le code dans une mémoire à accès séquentiel (5). En fonction de l'analyse effectuée sur les données à quatre bits dans un circuit de contrôle de modèle (4), un code à six bits est produit en réponse aux données à quatre bits ou bien un code à neuf bits est produit en réponse aux données à six bits. Lorsque la limite d'un code est "11", il est converti en "10" dans un circuit convertisseur de modèle "11" (11). On limite ainsi entre un et sept le nombre de bits de code de valeur "0" existant en continu dans les séries de code après la conversion et l'enregistrement magnétique est exécuté ensuite avec les inversions de mangnétisation en réponse aux bits de code de valeur "1".

    SYSTEM FOR CODING AND DECODING BINARY DATA
    74.
    发明申请
    SYSTEM FOR CODING AND DECODING BINARY DATA 审中-公开
    用于编码和解码二进制数据的系统

    公开(公告)号:WO1982000912A1

    公开(公告)日:1982-03-18

    申请号:PCT/JP1981000218

    申请日:1981-09-04

    CPC classification number: G11B20/1426

    Abstract: Un systeme de codage de donnees binaires particulierement adapte a l'enregistrement et a la reproduction magnetique limite les valeurs minimum et maximum d'une distance de magnetisation d'inversion de maniere a obtenir une densite d'enregistrement plus elevee. Les donnees binaires sont divisees par tranches de deux bits et le code de chaque groupe de deux bits est entre dans une memoire morte (7) ainsi que les codes adjacents devant et derriere, p.ex. les deux bits precedents et les quatre bits suivants puis il est sorti apres avoir ete converti en un code a quatre bits. Dans la disposition des bits du code converti, le nombre de bits de codage "0" present sequentiellement entre le bit de code "1" en un point arbitraire et le code suivant "1" est limite, par exemple, de 2 a 8. La ligne de signaux-codes convertis est enregistree magnetiquement de telle maniere que l'on fait correspondre une magnetisation inverse a chaque bit de code "1".

    METHOD OF CONTROLLING STEP-TRANSFER OF AN INFORMATION MEDIUM
    75.
    发明申请
    METHOD OF CONTROLLING STEP-TRANSFER OF AN INFORMATION MEDIUM 审中-公开
    控制信息媒介转移的方法

    公开(公告)号:WO1982000540A1

    公开(公告)日:1982-02-18

    申请号:PCT/JP1981000172

    申请日:1981-07-30

    Inventor: FUJITSU LTD

    CPC classification number: G11B15/602 G11B15/02 G11B15/1808 G11B20/1816

    Abstract: Dans un systeme de memoire a grande capacite avec un support d'information telle qu'une bande magnetique (T), un procede de commande d'un moteur d'enroulement (16) permet de faire en sorte e l'intervalle de temps requis pour clarifier les resultats du controle d'erreur ne provoque pas de retard dans le depart du transfert pas a pas du support. Des pistes d'enregistrement sont formees en bandes coupant obliquement le sens longitudinal de la bande magnetique (T). Lorsqu'une tete magnetique rotative finit l'enregistrement ou la reproduction sur l'une des pistes d'enregistrement, une impulsion de signal de fin de donnees est generee, et le moteur d'enroulement (16) commence le transfert pas a pas de la bande magnetique (T), avant que les resultats du controle d'erreur des donnees reproduites ne soient con- Dans le cas normal d'absence d'erreur, une instruction est generee de maniere a poursuivre le transfert, et la tete magnetique rotative (14) effectue l'enregistrement et la reproduction sur la piste d'enregistrent suivante. Si une erreur est detectee, une impulsion de signal d'inversion de rotation est generee et le moteur d'enroulement (16) tourne dans le sens inverse de maniere telle a ce que la premiere piste d'enregistrement soit enregistree ou reproduite de nouveau.

    ERROR RECOGNITION AND CORRECTION OF DIGITAL INFORMATION
    76.
    发明申请
    ERROR RECOGNITION AND CORRECTION OF DIGITAL INFORMATION 审中-公开
    错误识别和数字信息校正

    公开(公告)号:WO1980000760A1

    公开(公告)日:1980-04-17

    申请号:PCT/US1979000793

    申请日:1979-09-27

    CPC classification number: G06F11/1612 G11B20/18

    Abstract: Apparatus and techniques for converting analog data, preferably audio signals, to digital information, which digital information is preferably recorded from two separate main channels (11, 12) onto main tracks (22a, 22b) and includes a third or backup track (22c) for recording thereon partial or most significant portions of that information recorded on the main tracks. The invention involves apparatus and techniques of each data group on each main track and the backup track; checking (27) for synchronization codes arranged between data groups; and checking (30) for a match of that appropriate portion of the main track data against the data on the backup track, with, when potentially erroneous or questionable data is detected, the invention providing for comparison of main and backup track data groupings (31) for determining which is most likely correct or, in the case where neither data grouping is identifiable as most likely correct, the invention provides for substitution of last correct data or integration between good data. The preferred invention incorporates clocking at the signal input for data stabilization, and first-in-first-out circuitry (32) at the output for reducing the effects of wow and flutter to produce a very high quality conversion of digital to analog form to pass to a speaker system.

    Abstract translation: 用于将模拟数据(优选音频信号)转换为数字信息的装置和技术,数字信息优选地从两个独立的主通道(11,12)记录到主轨道(22a,22b)上并且包括第三或备用轨道(22c) 用于在其上记录记录在主轨道上的该信息的部分或最重要部分。 本发明涉及每个主轨道和备用轨道上的每个数据组的装置和技术; 检查(27)用于在数据组之间布置的同步码; 并且当检测到潜在的错误或可疑的数据时,检查(30)用于主轨道数据的适当部分与备份轨道上的数据的匹配,本发明提供主和备份轨道数据分组(31)的比较 ),用于确定哪个最有可能是正确的,或者在数据分组无法被识别为最可能是正确的情况下,本发明提供替代最后的正确数据或在良好数据之间的集成。 优选的发明结合了用于数据稳定的信号输入的时钟和在输出处的先进先出电路(32),用于减少哇音和颤动的影响,以产生数字到模拟形式的非常高质量的转换以通过 到扬声器系统。

    APPARATUS AND METHOD FOR DETECTING READ/WRITE GAP FAILURE AND SWITCHING TO AN ALTERNATIVE READ/WRITE GAP
    77.
    发明申请
    APPARATUS AND METHOD FOR DETECTING READ/WRITE GAP FAILURE AND SWITCHING TO AN ALTERNATIVE READ/WRITE GAP 审中-公开
    检测读取/写入缺陷和切换到替代读/写GAP的装置和方法

    公开(公告)号:WO1998026409A1

    公开(公告)日:1998-06-18

    申请号:PCT/US1997022427

    申请日:1997-12-03

    Abstract: A magnetic storage device (10) for storing and retrieving data from a magnetic medium such as a magnetic tape (22). The magnetic storage device (10) includes a first write gap (14), a first read gap (16) and at least one of a second write gap (18) and a second read gap (20) with each gap operatively associated with the magnetic medium. A controller (30) is coupled to each gap (14, 16, 18, 20). The controller (30) senses an error from a gap (16, 20) and stores an error flag.

    Abstract translation: 一种用于从诸如磁带(22)的磁介质存储和检索数据的磁存储装置(10)。 磁存储装置(10)包括第一写入间隙(14),第一读取间隙(16)和第二写入间隙(18)和第二读取间隙(20)中的至少一个,每个间隙可操作地与 磁性介质。 控制器(30)联接到每个间隙(14,16,18,20)。 控制器(30)从间隙(16,20)检测出错误并存储错误标志。

    METHOD OF INSURING DATA INTEGRITY WITH A DATA RANDOMIZER
    78.
    发明申请
    METHOD OF INSURING DATA INTEGRITY WITH A DATA RANDOMIZER 审中-公开
    使用数据随机存取数据完整性的方法

    公开(公告)号:WO1998016919A1

    公开(公告)日:1998-04-23

    申请号:PCT/US1997019010

    申请日:1997-10-10

    CPC classification number: G11B20/1833 G11B20/00652 G11B2020/183

    Abstract: The present invention relates in general to digital data storage systems and, more particularly, to a method for determining whether the correct data bas been read from a storage medium in a digital data storage system. A data storage system (10) is disclosed that is capable of performing a double check on data read from a storage media (12) to determine whether the data is the data desired by a requesting host computer (30). If the data is not the desired data, the system discards the data before it reaches the host (30). The data storage system (10) uses a randomizer unit (18) having a variable initialization value. The initialization value is based upon the address of the data storage location being accessed by the host (30). If the initialization value used to read a piece of data is different than the value used to write the data, uncorrectable data errors result and the data is discarded.

    Abstract translation: 本发明一般涉及数字数据存储系统,更具体地,涉及一种用于确定是否从数字数据存储系统中的存储介质读取正确数据的方法。 公开了一种数据存储系统(10),其能够对从存储介质(12)读取的数据执行双重检查,以确定数据是否是请求主计算机(30)所期望的数据。 如果数据不是所需的数据,则系统在数据到达主机之前丢弃数据(30)。 数据存储系统(10)使用具有可变初始化值的随机化器单元(18)。 初始化值基于由主机(30)访问的数据存储位置的地址。 如果用于读取一条数据的初始化值与用于写入数据的值不同,则会导致不可纠正的数据错误,并丢弃数据。

    REDUNDANT SYNCHRONIZATION FIELDS TO IMPROVE DISC DRIVE READ PERFORMANCE
    79.
    发明申请
    REDUNDANT SYNCHRONIZATION FIELDS TO IMPROVE DISC DRIVE READ PERFORMANCE 审中-公开
    冗余同步字段,以提高磁盘驱动器读取性能

    公开(公告)号:WO1998014936A1

    公开(公告)日:1998-04-09

    申请号:PCT/US1997017653

    申请日:1997-09-30

    Abstract: An apparatus and method are disclosed for reducing the effects of thermal asperities and other anomalous conditions on disc drive read operations. An improved format for a data block (300, 400) is provided having first and second sync fields (308, 316, 408, 412) in which sync patterns are stored, the first and second sync fields being separated by a selected distance within the data block. The sync pattern of the second sync field enables synchronization of a disc drive read channel (160) to the user data in the data block when the read channel fails to be synchronized by the sync pattern of the first sync field. In one embodiment, control information used by the read channel to prepare for receipt of the user data is stored in control fields (310, 314) between the first and second sync fields; in an alternative embodiment, a portion of the user data is stored in a data field (410) between the first and second sync fields.

    Abstract translation: 公开了用于减少热凹凸和其他异常条件对磁盘驱动器读取操作的影响的装置和方法。 提供了一种用于数据块(300,400)的改进格式,其具有存储同步模式的第一和第二同步字段(308,316,408,412),第一和第二同步字段在 数据块。 当读通道不能被第一同步字段的同步模式同步时,第二同步字段的同步模式使得盘驱动器读通道(160)能够与数据块中的用户数据同步。 在一个实施例中,读通道用于准备接收用户数据的控制信息被存储在第一和第二同步字段之间的控制字段(310,314)中; 在替代实施例中,用户数据的一部分被存储在第一和第二同步字段之间的数据字段(410)中。

    METHOD AND APPARATUS FOR SPECTRAL ANALYSIS IN A DISK RECORDING SYSTEM
    80.
    发明申请
    METHOD AND APPARATUS FOR SPECTRAL ANALYSIS IN A DISK RECORDING SYSTEM 审中-公开
    磁盘记录系统中光谱分析的方法与装置

    公开(公告)号:WO1997041552A1

    公开(公告)日:1997-11-06

    申请号:PCT/US1997006833

    申请日:1997-04-23

    Abstract: A method of performing spectral analysis of signals recorded by a magnetic recording or storage system is provided using a modified channel chip of the system. The modified channel chip enables measurement of harmonic components of the recorded signal. The method is performed by reading the recorded periodic analog signal and converting the signal into a discrete time periodic signal. The discrete time periodic signal is digitally sampled at predetermined intervals, and the digital samples are selectively accumulated in a register (341) or registers of the channel chip. Incoming digital samples are accumulated by alternately being added and substracted (345) to contents of single register (341). The accumulated results represent summations used to determine harmonic coefficients of the recorded signal. The harmonic sensor includes an arithmetic unit and a register (341) or register for accumulating the digital samples.

    Abstract translation: 使用系统的修改的通道芯片提供对由磁记录或存储系统记录的信号执行频谱分析的方法。 经修改的通道芯片能够测量记录信号的谐波分量。 该方法通过读取记录的周期性模拟信号并将信号转换成离散的时间周期信号来执行。 离散时间周期信号以预定间隔数字采样,并且数字样本被选择性地累积在寄存器(341)或信道芯片的寄存器中。 通过交替地添加和减少(345)到单个寄存器(341)的内容来累积进入的数字样本。 累积结果表示用于确定记录信号的谐波系数的求和。 谐波传感器包括算术单元和用于累积数字样本的寄存器(341)或寄存器。

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