A recording/reproducing apparatus and control method thereof capable of easily recording and reproducing all kinds of information obtained from broadcasts, communications and recording mediums of all types, and further capable of applying suitable restrictions on use of digital information. A hard disk...http://www.google.com.hk/patents/US20020054441?utm_source=gb-gplus-share專利 US20020054441 - Recording/reproducing apparatus and control method thereof
