Apparatus for reproducing multiplex video data

An apparatus for reproducing multiplex video data comprising:

• receiver means for outputting composite video signals, said composite video signals including main video signals having a vertical blanking interval and symbol data multiplexed with the main video signals during the vertical blanking interval;
• write-in gate means for selecting the symbol data from the composite video signals outputted by said receiver means;
• memory means connected to said write-in gate means and responsive to to selecting of symbol data for recording the selected symbol data;
• read-out gate means for reading out the symbol data recorded in said memory means;
• and
• means for superposing the symbol data read out by said read-out gate means with the composite video signals outputted by said receiver means to produce a resultant signal for visual display, including means connected to said receiver means for controlling the amplitude of the main video signals in the composite video signals outputted by said receiver means and corresponding to the superposing background for the symbol data, and mixer means connected to said read-out gate means and said amplitude controlling means for multiplexing the symbol data read-out by said read-out gate means with the composite video signals having a main video signals amplitude controlled by said amplitude controlling means to produce a resultant signal for visual display.