Patent ID: 8135066

Claim:
Data processing apparatus arranged to process successive video images and an associated audio signal; the apparatus comprising: means for detecting inter-image motion in the successive video images; means for detecting whether the inter-image motion satisfies one or more predetermined motion criteria; means for detecting an audio signal pattern in the associated audio signal satisfying one or more predetermined audio criteria; activation means for activating a control function of the data processing apparatus in response to a substantially simultaneous occurrence of: (a) a detection of inter-image motion satisfying the one or more predetermined motion criteria; and (b) a detection of an audio signal pattern in the associated audio signal which satisfies the one or more predetermined audio criteria; and means for detecting, for each of a series of successive images, one or more active image regions in each image where inter-image motion has been detected; in which a predetermined motion criterion is satisfied if at least one of the one or more active image regions is subject to a predetermined displacement between successive images.