Method and apparatus for independently transmitting and recapturing clock recovery burst and DC restoration signals in a MAC system

In a video signal receiver for receiving multiple lines of a frequency modulated time division multiplexed analog component video signal having either a clock recovery burst or a DC restoration reference level transmitted during a predetermined portion of each line's horizontal blanking interval, a device for recapturing the clock recovery burst and the DC restoration reference level comprising:

• first pulse generating means for generating a first enable pulse whose timing and duration correspond substantially to the predetermined portion of each line's horizontal blanking interval;
• second pulse generating means having first and second output ports for generating a second enable pulse having a duration corresponding to the transmitted line time and alternately outputting said second enabled pulse at said first and second output ports after every N line time durations;
• first coincidence gate coupled to said first pulse generating means and the first output port of said second pulse generating means to output a first gating signal during the coincidence of said first enable signal and said second enable signal at the first output port;
• first gating means coupled to said first coincidence gate for receiving the transmitted video lines and outputting a portion of the video line corresponding to said first gating signal;
• second coincidence gate coupled to said first pulse generating means and the second output port of said second pulse generating means to output a second gating signal during the coincidence of said first enable signal and said second enable signal at the second output port;
• and
• second gating means coupled to said second coincidence gate for outputting a reference level value signal corresponding to the duration of said second gating signal.