A data broadcast receiving apparatus used in a system is combined with another transmission line such as telephone circuit. By receiving a television broadcast having a data broadcast signal, such as a teletext signal, superposed on the television broadcast signal, in which a first auxiliary information...http://www.google.ca/patents/US6028644?utm_source=gb-gplus-sharePatent US6028644 - Data broadcast receiving apparatus receiving a television broadcast signal with a superposed data broadcast signal
