Picture in Picture System with a Digital Memory for VCRS

A VCR has two sources ; a signal from the tuner and a playback signal. It is very convenient if we can monitor these signals simaltaneously. As the cost of a memory (RAM) has been becoming low, digital technology can be added to a VCR to meet the need.

[1]  Takuya Imaide,et al.  Fully Digitalized Color Picture in Picture Television System , 1979, IEEE Transactions on Consumer Electronics.

[2]  E. Kretzmer.  Statistics of television signals , 1952 .