| 摘要 |
<p>A teletext/data transmission decoder (121) decodes information on characters and graphics and produces a supplementary program video signal. A proper program video signal arriving by way of a video processing circuit (112) and a display image processing section (113) and the supplementary program video signal coming from the decoder (121) are synthetically combined by a synthesizing section (114) and fed to a display unit (115). A system controller (131) sets the decoder (121) in waiting state. If the proper program video signal contains data information, the system controller (131) automatically starts a decoding operation and controls the synthesizing section (114) to display the restored signal on the display unit (115). When an automatic display select switch (133) is set to an automatic display mode, a supplementary program processing mode is automatically selected when a supplementary program is started. <IMAGE></p> |
