公开(公告)号：US4180833A

公开(公告)日：1979-12-25

申请号：US877867

申请日：1978-02-15

Applicant: Masaru Nishikawa ,  Toshihiko Numakura ,  Jun Hirai

Inventor： Masaru Nishikawa ,  Toshihiko Numakura ,  Jun Hirai

IPC: G11B5/027 ,  G11B5/48 ,  G11B5/53 ,  G11B23/00 ,  H04N5/7826 ,  H04N5/783 ,  G11B5/02 ,  H04N5/78

CPC classification number: H04N5/783 ,  G11B23/0007 ,  G11B5/4893 ,  G11B5/534 ,  H04N5/78263

Abstract: In an apparatus for reproducing video signals which are recorded as modulations of a carrier on a record medium, such as a magnetic tape, in successive, abutting parallel record tracks, with the signals being recorded in alternating tracks with different first and second azimuth angles, first and second magnetic heads are provided for sequentially scanning the tracks in which signals are recorded with the first and second azimuth angles, respectively, and the first and second magnetic heads having azimuth angles corresponding to the first and second azimuth angles of the respective tracks to be scanned thereby. Each of the magnetic heads is dimensioned and guided in the direction transverse to the direction along the respective track being scanned so as to overlap an adjacent track by a distance .DELTA.W=n.lambda./tan .theta.(n=1,2, . . .), in which .lambda. is the wavelength of the carrier as modulated by synchronizing signal portions of the video signals recorded in such adjacent track, and .theta. is the difference between the first and second azimuth angles of the heads. In this manner, cross-talk from the adjacent track is substantially attenuated.

Abstract translation: 在用于再现被记录为诸如磁带的记录介质上的载体的调制的视频信号的装置中，在连续的邻接并行记录轨道中，信号被记录在具有不同的第一和第二方位角的交替轨迹中， 提供第一和第二磁头以分别以第一和第二方位角顺序地扫描记录有信号的轨道，并且第一和第二磁头具有对应于各个轨道的第一和第二方位角的方位角到 被扫描。 每个磁头的尺寸和横向于沿着被扫描的相应轨道的方向被引导，以便使相邻轨道重叠距离DELTA W =nλ/tanθ（n = 1,2，...）。 ），其中λ是通过使记录在这种相邻轨道中的视频信号的信号部分同步来调制的载波的波长，θ是磁头的第一和第二方位角之间的差。 以这种方式，来自相邻轨道的串扰实质上是衰减的。