A portable rating apparatus for rating one of audio and video content. The apparatus includes a user-manipulable control dedicated for generating a signal indicating a rating of a media content. The rating corresponds to one of a plurality of categories of preferences. A processor, operatively connected...http://www.google.co.uk/patents/US7031931?utm_source=gb-gplus-sharePatent US7031931 - Portable device attached to a media player for rating audio/video contents
