Gnometv is a television and teletext viewer application for the GNOME environment. It can be used with video digitizer, tuner cards which provides /dev/video like device for television and /dev/vbi device for the teletext part.
Gnometv supports PAL, SECAM, NTSC television standards (depending on your tv-card), and WST (World Standard Teletext) teletext standard (depending only on gnometv if you have /dev/vbi).