An apparatus for mixing a play video signal derived by playing a recording medium with a graphics video signal derived on the basis of data processing. A video selecting signal generated on the basis of image data is delayed, where its delay time is adjustable. By issuing image data for testing, the...http://www.google.com/patents/US5579028?utm_source=gb-gplus-sharePatent US5579028 - Apparatus for mixing play video signal with graphics video signal
