Digital type VSB modulation apparatus

A digital type VSB modulation apparatus comprising:

• generation means for generating, from a digital baseband signal, an in-phase component of a modulation signal having a frequency spectrum having a high-frequency component whose level is half that of a low-frequency component thereof, and an orthogonal component of the modulation signal of a high-frequency component having a frequency spectrum whose level is half that of the low-frequency component of the in phase component;
• a carrier signal generation means for generating two carrier signals having a same frequency and having different phases;
• carrier component generation means for multiplying the in-phase component and the orthogonal component output from said generation means with the carrier signals output from said carrier signal generation means, respectively, so as to obtain a carrier in-phase component and a carrier orthogonal component;
• and
• synthesis means for synthesizing the carrier in-phase component and the carrier orthogonal component output from said carrier component generation means so as to obtain a VSB modulation signal.