Based on a digital recorder/player taken as a basic apparatus and which accommodates a field frequency of 60 fields/sec or a frame frequency of 30 frames/sec, an apparatus is implemented to record or reproduce source video and audio signal originated from the basic apparatus and whose frequency is different...http://www.google.fr/patents/US7603190?utm_source=gb-gplus-shareBrevet US7603190 - Digital recording/reproducing apparatus
