Deriving ancillary data from primary media data, directing the primary data to a primary device and the ancillary data to an ancillary device

摘要

Media data (e.g. a broadcast television signal) may comprise primary content (i.e. audio visual data) and ancillary content (e.g. a URL of a web site associated with the primary data). The media data is received by a media controller 12 which directs the primary content to a primary media device 20 (e.g. a television) and the ancillary content to an ancillary media device 22 (e.g a PC). In one embodiment the media does not contain separate ancillary content, but rather the ancillary content can be derived from the primary content, for example by applying character recognition 102 to the visual data or speech recognition 100 to the audio data. The media controller may be provided with a filter 82 to ensure that only predetermined types of ancillary data are passed to the ancillary device.