发明名称 Lap and dissolve in video cameras with VTR
摘要 A video camera is provided with means for producing lap and/or dissolve effects between successively recorded scenes. Means are provided for controlling the level of AC bias accompanying the video signals applied to a magnetic recording head. A dissolve effect is achieved by gradually decreasing the level of such bias at the end of a recorded scene. A lap effect is achieved by gradually increasing the bias level at the beginning of a new scene. A simultaneous lap and dissolve effect is achieved by performing the individual lap and dissolve effects on the same segment of tape. To do this, the tape drive is reversed at the end of each scene to position the dissolved portion of the scene upstream of the magnetic recording head. Upon recording a new scene while gradually increasing the level of AC bias at the beginning thereof, a simultaneous lap and dissolve effect is achieved automatically.
申请公布号 US4325088(A) 申请公布日期 1982.04.13
申请号 US19800132967 申请日期 1980.03.24
申请人 EASTMAN TECHNOLOGY, INC. 发明人 WRIGHT, CHARLES E.
分类号 G11B5/008;G11B5/02;G11B15/20;G11B27/024;G11B27/10;(IPC1-7):H04N5/79 主分类号 G11B5/008
代理机构 代理人
主权项
地址