An audio and/or video generation apparatus comprises a recording processor which is operable to record audio and/or video signals on a recording medium, a meta data generation processor which is operable to generate meta data identifying the content of the audio/video signals, and a communications processor...http://www.google.com.tw/patents/US20020136531?utm_source=gb-gplus-share專利 US20020136531 - Audio and/or video generation apparatus and method of generating audio and/or video signals
