| 摘要 |
PURPOSE:To instantaneously perform commnication with the content of the titled disk, by recording the 1st video information signal on circumferential tracks which are selected by jumping over the prescribed tracks and the 2nd video information signal on circumferential tracks adjacent to the tracks for the 1st signal, which are also selected in the same manner. CONSTITUTION:The disk of this invention is designed in such a way that video information signals of two frames, namely, of four vertical scanning periods are recorded on the disk by one rotation and the recording track is shifted inward by two tracks at a point A at every one rotation, that is to say the 1st video information signal is previously recorded on every 3rd track by successively changing the recording track inward starting from No.0 to No.3N through No.3, 6, 9..., and then, the 2nd video information signal is recorded in the same way on tracks No.1, 4, 7...(3N+1). In the case of the reproduction, the reproducing stylus moves by the two tracks distance inward whenever the stylus scanning along a track reaches the point A and in a certain reproduction, the stylus reproduces the 1st video information signal by successively jumping to the tracks No.0, 3, 6...,3N. |
