Subtitle signal format of viewer-selectable caption broadcasting

摘要

The present invention relates to a caption signal format of a viewer selectable caption broadcasting, and more particularly, to a caption signal format of a viewer selectable caption broadcasting which transmits caption signals to one scanning line of each field of a television signal and transmits the caption signals, A bit clock synchronizing signal of a sinusoidal signal of a predetermined cycle having a frequency divided; A word start signal having a sinusoidal wave of one cycle having a frequency obtained by frequency-dividing a bit clock synchronous signal; And an 18-bit data signal modulated with a sinusoidal wave having a frequency smaller than the frequency of the bit clock synchronous signal and having a frequency greater than the frequency of the word start signal.;Therefore, in the present invention, the frequency of the color subcarrier is divided to form the caption signal, so that the phase synchronization is easy, and the cost of the receiving apparatus can be reduced.