| 摘要 |
<P>PROBLEM TO BE SOLVED: To properly and clearly display an image expressed by a video signal of an optional transmission type on a display of an optional screen type. <P>SOLUTION: A PLL 3 and a controller 7 in the video signal processor 9 identify the transmission type of a video signal B input from a terminal 1 in accordance with an identification signal C received by a terminal 4. The PLL 3 divides the frequency of a reference frequency to be compared with the phase of the video signal B by using a frequency division ratio suited to the identified transmission type of the video signal B. Thereby, an optimum sampling frequency is applied to an A/D converter 2. The controller 7 determines the vertical enlargement ratio of a vertical enlargement circuit 5 and the horizontal enlargement ratio of a horizontal enlargement circuit 6 from the screen type of the display 8 and the identified transmission type of the video signal B. Consequently, the vertical enlargement circuit 5 and the horizontal enlargement circuit 6 apply to the video signal B vertical enlargement processing and horizontal enlargement processing for offsetting a difference of aspect ratios between the display 8 and the video signal B, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT |
