Method and device for disabling sound and/or visual display

摘要: A method of controlling the viewing television programmes according to their content involves sending codes using an auxiliary data channel which indicate level sexual, violent, distressing, etc. content. These are assembled into extension packet a teletext signal and detected at receiver. The receiver is programmed by entering corresponding allowable or forbidden cause display be blanked sound muted in dependence on transmitted codes. system, programme source also described.