-
1.发明授权
公开(公告)号：US4982302A
公开(公告)日：1991-01-01
申请号：US179352
申请日：1988-04-08
CPC分类号： G11B5/02 , G11B5/00 , G11B5/716 , G11B5/78 , H04N5/78213
摘要： A method for magnetic recording and reproduction comprising the steps of: (1) magnetically multiple-recording signals on a magnetic recording medium comprising a support having thereon an upper magnetic recording layer comprising barium ferrite having an increased coercive force at 60.degree. C. or more and a lower magnetic recording layer comprising at least one of chromium dioxide and Co-modified iron oxide, having a decreased coercive force at 60.degree. C. or more, disposed between said upper magnetic recording layer and said support; (2) heating said magnetic recording layers prior to reproduction due to a reproducing head; and (3) reproducing said magnetically recorded signal from said heated magnetic recording medium which is multiple-recorded.
摘要翻译： 一种用于磁记录和再现的方法，包括以下步骤：（1）磁记录介质上的磁记录信号，该磁记录介质包括一个载体，其上有一个上磁记录层，该磁记录层包括在60℃以上矫顽力增加的钡铁氧体 以及设置在所述上部磁记录层和所述支撑体之间的包含二氧化铬和Co改性氧化铁中的至少一种，具有降低的矫顽力在60℃以上的低磁记录层; （2）由于再现头而在再现之前加热所述磁记录层; 和（3）从被记录的多个加热磁记录介质再现所述磁记录信号。
-
2.发明授权Video signal recording method and associated recording/reproducing apparatus 失效视频信号记录方法和相关联的记录/再现装置
公开(公告)号：US4839744A
公开(公告)日：1989-06-13
申请号：US90441
申请日：1987-08-28
IPC分类号： H04N9/797
CPC分类号： H04N9/7973
摘要： Disclosed is a video signal recording system, in which the input video signal is rid of unneeded portions, transformed on the time axis and divided into n channels so that they are recorded in a bandwidth narrower than 1/n of original one. The system also enhances the latitude in choosing a clock frequency for time-axis conversion and a track width, thereby optimizing the picture quality and recording time length on a trade-off basis.
摘要翻译： 公开了一种视频信号记录系统，其中输入视频信号消除不需要的部分，在时间轴上变换并被划分为n个信道，使得它们以比原始信号的1 / n窄的带宽被记录。 该系统还增加了选择时间轴转换的时钟频率和轨道宽度的自由度，从而在折衷的基础上优化图像质量和记录时间长度。
-
搜索结果
2 条记录 (耗时 0.007 秒)