| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem wherein a plurality of pieces of information such as video information, sound information and data information obtained by using a channel selection part for system control can not be received at the same time when a system control signal is not used because a channel selecting part for a system control signal can not select a main signal including the video information, sound information and data information. <P>SOLUTION: The channel selection for system control is also made to have a function that can select the main signal including the video information, sound information and data information, both a channel selecting part for a main signal transmission system and the channel selecting part for system control can select the main signal including the video information, sound information and data information, and these channel selecting method is optionally controlled. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
