Digital data encode system

摘要

A digital data encode system for inserting water mark data into digital data signals having a series of field data by use of a water mark data inserting device (140), said digital data encode system comprising a field judging unit (120) dividing the digital data signals by a predetermined reference, a water mark data selection output unit (130) for selecting proper one of a plurality of different water mark data prepared correspondingly to the division according to the judgement result of the field judging unit (120), and a water mark data inserting device (140) for inserting the water mark data supplied from the water mark data selection output unit (130) into the digital data signals.