模拟视频素材数字化的新方法

New Method of Digitizing an Analog Video Footage

介绍了利用Betacam录像机有关电路处理U-matic磁带信号进行数字化存储,对于抢救珍贵历史素材有一定的实用价值。用Betacam录像机的TBC电路处理U-matic重放的视频信号,只要解决同步就容易实现消除时基抖动。但要用Betacam录像机数字失落补偿电路来解决因磁带陈旧失落信号严重的问题是困难的。通过实践巧妙地利用原有1H延时线加上脉冲移位矩阵,很好地解决了这个问题。

The treatment and digitized memory of U-matic tape information by the application of some electronic circuit in Betacam videois introduced, and this could be of a certain practical value with the aim to rescuing precious historical materials. Time basic shaking could be removed once the simultaneous interference is cleared for TBC treatment of re-shown screen signal in Betaeam video. On the other hand, the combination of IH delay line and pulse shift matrix solves information loss caused by tape backwardness through the way of DOC circuit in Betaeam video.