Time Base Correctors

摘要

Many of the problems that are associated with poor VHS quality are due to mechanical differences that make it impossible to play back the video signal from the VHS tape in the same way that it was recorded. These differences, called time-base errors, result in vertical frame rolling, horizontal frame displacement, jittering, alternate lightening and darkening of the image and wavy vertical lines. Time-base errors will be apparent before capture as playback quality viewed on your TV will be poor - you'll see these problems if you attempt to play back your tapes on a VCR connected to your TV. They can be eliminated using a Time Base Corrector (TBC). If you own a good quality S-VHS VCR it may have a built-in TBC - all you need to do is switch it on.