Method and apparatus for video special effects.

摘要

A video signal (V1) is processed in response to a key signal (K1) by selecting the video signal when the value of the key signal is within a first range and selecting a second signal (SB) when the value of the key signal is within a second range that excludes the first range. The amplitude of the second signal is outside the range of a video signal throughout the active picture interval. <IMAGE>