To make video be on the air in direct real time in the state of naturally applying mosaic processing to a part including an expression, which is unsuitable for privacy or public morals as it is, by eliminating necessity to artificially applying the confirmation or mosaic processing of that unsuitable part even in the case of such video.

In a template video area extracting part 105, a digital video signal from a digital signal processing part 103 is retrieved on the basis of template video data and the coordinate data of a template video area, where the degree of matching is equal to or higher than a prescribed threshold, are temporarily stored. In a mosaic processing part 106, mosaic processing is applied to the digital video signal inputted from the digital signal processing part 103. In a signal switching part 107, an ordinary digital video signal from the digital signal processing part 103 and the digital video signal, to which mosaic processing is applied, from the mosaic processing part 106 are switched and D/A conversion is applied.