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    • 5. 发明授权
    • Multiplex magnetic recording and reproduction system
    • 多重磁记录和再现系统
    • US4591924A
    • 1986-05-27
    • US575665
    • 1984-01-31
    • Kuniaki MiuraYoshinori OkadaIsao FukushimaTeizo Tamura
    • Kuniaki MiuraYoshinori OkadaIsao FukushimaTeizo Tamura
    • G11B5/02G11B5/008G11B5/53G11B15/12G11B15/18G11B15/467G11B20/22H04N5/7826H04N9/79H04N9/802H04N9/835H04N9/80
    • H04N9/802G11B15/125G11B15/1875G11B20/22G11B5/00878G11B5/534H04N5/78263H04N9/7921H04N9/8355G11B15/4673
    • In a video tape recorder of the helical scan type, a pair of rotary magnetic heads for the audio signal are provided in addition to the rotary video heads so that the audio signal is recorded on the same slant track as of the video signal on a multiplex basis. The audio head pair is provided with an azimuth angle with opposite polarities from each other and different in value from that of the video head pair. The system has a first operation mode of the standard tape speed and a second operation mode in which the tape is fed at a speed, for example, 1/3 the standard tape speed. The audio and video head pairs are disposed on lines intersecting at right angles with an offset of T.sub.1 /2+T.sub.1 provided in the axial direction of rotation between the two magnetic head pairs, where T.sub.1 is the track pitch of the recording track formed on the tape in the second operation mode. The system produces overlapping tracks for the audio and video signals on the magnetic tape. In the first operation mode, the recording track is formed by a combination of magnetic heads providing an increased difference of azimuth angles between the audio and video heads, while in the second operation mode, the track is formed by a combination of magnetic heads providing a decreased difference of azimuth angles between the audio and video heads.
    • 在螺旋扫描类型的磁带录像机中,除了旋转视频磁头之外,还提供一对音频信号的旋转磁头,使得音频信号被记录在与多路复用器上的视频信号相同的倾斜磁道上 基础。 音频头对被提供有彼此极性相反的方位角,其值与视频头对的极值相差。 该系统具有标准带速度的第一操作模式和第二操作模式,其中以例如1/3标准带速度的速度馈送带。 音频和视频头对被布置在与两个磁头对之间的旋转轴线方向上设置的T1 / 2 + T1偏移的直角相交的线上,其中T1是形成在第二磁头对上的记录轨道的轨道间距 磁带在第二个操作模式。 该系统为磁带上的音频和视频信号产生重叠的轨道。 在第一操作模式中,通过磁头的组合形成记录磁道,该磁头提供音频和视频磁头之间的方位角的增加的差异,而在第二操作模式中,磁道由提供 降低音频和视频头之间的方位角差。