会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Data recording with high speed search capability
    • 具有高速搜索能力的数据记录
    • US3986208A
    • 1976-10-12
    • US516069
    • 1974-10-21
    • John R. Sykes
    • John R. Sykes
    • G11B27/10G11B5/09
    • G11B27/107
    • A system of and method for writing and reading data on magnetic tape records having the capability of searching for certain data files in which selected messages are written is disclosed. The files are written successively on the tape with a name block which identifies or describes the files and data block which constitute the files written alternately to constitute the file format. The file names are written at much less than the normal data density. When reading the files, search operations are carried on at high tape speed; the ratio of the high tape speed to normal tape reading speed being the same ratio as the ratio of the normal density of recording of the data block to the lower density of recording of the file names in terms of bits per linear inch. The bit rate produced while reading the file names at high speed is then exactly equal to the bit rate generated while reading data blocks at low speed. Searches for selected files are conducted by comparing file names read from the tape with the names of the selected files while the tape is transported at high speed. Reading is carried out such that only data produced at the normal bit rate is read out and decoded. Thus, the tape speed selected is determinative of whether a search mode or data reading mode of operation is employed; special decoding logic or tracks for obtaining address data when tapes are driven in high speed search modes being eliminated.
    • 公开了一种用于在具有搜索写入所选择的消息的特定数据文件的能力的磁带记录上写入和读取数据的系统和方法。 这些文件被连续地写在磁带上,该名称块标识或描述构成文件交替的文件和数据块,以构成文件格式。 文件名写入的数据量远低于正常的数据密度。 读取文件时,搜索操作以高磁带速度进行; 高磁带速度与正常磁带读取速度的比率与数据块的正常记录密度与文件名记录的较低密度的比率以每线性英寸的位数相同的比率。 在高速读取文件名时产生的比特率则与在低速读取数据块时产生的比特率完全相同。 通过将磁带上读取的文件名称与所选文件的名称进行比较,在磁带以高速传输的情况下,对所选文件进行搜索。 执行读取,使得仅读取并解码以正常比特率产生的数据。 因此,所选择的磁带速度决定于是否采用搜索模式或数据读取操作模式; 用于在磁带以高速搜索模式驱动时获得地址数据的特殊解码逻辑或轨道被消除。