Double picture generation apparatus for video cassette tape recorder

A double picture generation apparatus for a video cassette tape recorder, comprising:

• a selection unit for receiving a video signal and an audio signal separated by a tuner/intermediate frequency processing unit, a video signal and an audio signal reproduced by a recording/reproducing unit, and a video signal and an audio signal inputted thereto through an audio/video input terminal, and for outputting at least two video signals and audio signals in accordance with a selection signal;
• an ARC/DW module for receiving two video signals outputted from said selection unit and generating a video signal of a double picture;
• an NTSC encoder for encoding a video signal of a double picture outputted from said ARC/DW module in accordance with an NTSC broadcast method and for outputting encoded video signal to an audio/video output terminal;
• and
• an output unit for modulating the video signal of a double picture encoded by said NTSC encoder and an audio signal outputted from said output unit and for outputting the modulated signals to a television set;
• wherein said ARC/DW module includes:
• first and second NTSC decoders for receiving first and second video signals, at least one of said first and second video signals being outputted from the selection unit;
• first and second buffering units for adjusting a write/read speed difference between a luminance signal and a chrominance signal outputted from said first and second NTSC decoders;
• a first picture processing unit and a second picture processing unit for horizontally interpolating, decimating and vertically interpolating a digital luminance/chrominance signal outputted from said first and second buffering units and for outputting first-side and second-side picture video signals, respectively;
• a luminance selection unit for alternatively selecting digital luminance signals outputted from said first-side picture processing unit and said second-side picture processing unit in accordance with an output selection signal and for outputting a luminance signal of a double picture;
• and
• a chrominance selection unit for outputting a chrominance signal of a double picture by alternately selecting a digital chrominance signal outputted from the first picture processing unit and the second picture processing unit in accordance with an output selection signal.