Audiovisual display apparatus and method

摘要

The invention provides for an audio visual display apparatus ( 10 ) arranged to receive a broadcast signal comprising a video element and an audio element, wherein the audio element includes an audio description element providing a description of at least some of the video content, the apparatus ( 10 ) including means for switching ( 24 ) to output the said audio description element in place of the video element and which switching is responsive to a deterioration in an operating characteristic of the apparatus.