| 摘要 |
<p>A video signal is recorded in oblique tracks on a magnetic tape. The tracks are successively scanned by rotary heads, and a reproduced radio frequency signal is obtained. The level of the signal as reproduced exhibits a nonlinearity as a function of deviations of the rotary heads from the successively scanned oblique tracks. In accordance with the invention, the running speed of the tape is controlled on the basis of the detected changes in signal level, and the gain of the reproduced radio frequency signal is controlled in such a way as to compensate for the nonlinearity of the reproduced signal.</p> |
