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1. 发明授权

US5396373A Magnetic recording/reproducing apparatus using segment recording system 失效
标题翻译：使用片段记录系统的磁记录/重放装置
公开(公告)号：US5396373A
公开(公告)日：1995-03-07
申请号：US026850
申请日：1993-03-05
申请人： Kouji Mori , Satoshi Murakami , Ichirou Konno
发明人： Kouji Mori , Satoshi Murakami , Ichirou Konno
IPC分类号： G11B15/087 , G11B15/467 , H04N5/7826 , H04N5/923 , H04N5/945 , G11B5/02
CPC分类号： G11B15/4678 , G11B15/087 , H04N5/78266 , H04N5/923 , H04N5/945
摘要： A digital VTR using Automatic Track Finding (ATF) of a four frequency pilot signal system, employing a multiple segment recording system for high density recording and wide band recording. In a recording mode, a segment code signal is recorded on each track in response to a frame synchronizing signal. In a reproduction mode, the phase difference between the reproduced segment code signal and the frame synchronizing signal is detected by phase comparing circuit 26. The rotation speed of capstan motor 29 is controlled so that the phase relation of one signal in the reproduction mode becomes the same as that in the recording mode. As a result, it is possible to reproduce a stable video in the VTR using the segment recording system.
摘要翻译：使用四频率导频信号系统的自动轨迹寻找（ATF）的数字VTR，采用用于高密度记录和宽带记录的多段记录系统。在记录模式中，响应于帧同步信号，在每个磁道上记录分段码信号。在再现模式中，通过相位比较电路26检测再现段码信号和帧同步信号之间的相位差。主导轴电动机29的旋转速度被控制，使得再现模式中的一个信号的相位关系成为与录音模式相同。结果，可以使用片段记录系统在VTR中再现稳定的视频。

2. 发明授权

US5304997A 8-bit data word to 15-bit codeword converter utilizing periodically varying digital sum variation 失效
标题翻译：使用周期性变化的数字和变化的8位数据字到15位码字转换器
公开(公告)号：US5304997A
公开(公告)日：1994-04-19
申请号：US856984
申请日：1992-03-24
申请人： Ichirou Konno
发明人： Ichirou Konno
IPC分类号： G11B15/46 , G11B20/14 , H03M5/14 , H03M7/14 , H03M7/00
CPC分类号： G11B15/463 , G11B20/1426 , H03M5/145 , G11B2020/1438
摘要： A plurality of first codeword pairs each including a 15-bit codeword of which CDS is equal to +3 and a 15-bit codeword of which CDS is equal to -1 and a plurality of second code pairs each including a 15-bit codeword of which CDS is equal to +1 and a 15-bit codeword of which CDS is equal to -3 are produced. One of the plurality of first code pairs and one of the plurality of second code pairs are assigned to each 8-bit data word, and one of the first and second code pairs assigned to each 8-bit data word is selected so that the number of continuous identical bits in a 15-bit codeword sequence is not less than 2 and not more than 8. One of two 15-bit codewords included in the selected code pair is selected so that DSV at the last bit of each 15-bit codeword periodically varies.
摘要翻译：多个第一码字对，每个包括CDS等于+3的15位码字和CDS等于-1的15位码字，以及多个第二码对，每个包括15位码字，该CDS等于+1，并产生CDS等于-3的15位码字。多个第一代码对中的一个和多个第二代码对中的一个被分配给每个8位数据字，并且分配给每个8位数据字的第一和第二代码对中的一个被选择，使得数字在15位码字序列中的连续相同比特的数目不小于2并且不超过8.所选代码对中包括的两个15比特码字中的一个被选择，使得每个15比特码字的最后一位的DSV 定期变化。

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