| 摘要 |
<p>The video signal from a video processing circuit (112) is fed to a compression circuit (113) and a teletext/data transmission decoder (131). The video signal from a video processing circuit (122) is fed to a data transmission detector (132) and a compression circuit (123). Upon detecting a data transmission signal, the data transmission detector (132) feeds a main controller (151) with a detection signal. If he channel connected to tuner (121) provides a supplementary program whereas the channel connected to tuner (111) does not provide any supplementary program, the main controller (151) switches the reception channels so that the supplementary program is received by the tuner (111). With this arrangement, the characters and graphics of supplementary programs are automatically displayed on a predetermined side of the screen of a display unit so that the viewer can recognize every supplementary program without misunderstanding. <IMAGE></p> |
