| 摘要 |
<p>A technique for selectively inhibiting television receiving apparatus from displaying those television channels which are not authorized for viewing, such as unsubscribed television channels and channels with programs which satisfy predetermined content ratings criteria. A rating code representing the content ratings criteria of those channels which a viewer wishes to inhibit from being displayed is obtained. When either channel up or channel down buttons (201) are operated by the viewer, the rating data associated with the next television channel (202) is compared (208) with the rating code to determine if that television channel satisfies the predetermined content ratings criteria. If so, the channel is blocked and another channel having rating data which do not satisfy the predetermined content ratings criteria then is selected and the program broadcast thereon is displayed (209) to permit the viewer to watch channels broadcasting acceptable television programs.</p> |
