In digital data packets comprising a first datum from which a second datum can be unequivocally computed, e.g. an error correction value, one or a plurality of additional data can be introduced by manipulating said second datum without altering the structure of the data packet. For this purpose, one...http://www.google.fr/patents/US5859857?utm_source=gb-gplus-shareBrevet US5859857 - Method for the integration of additional data in digital data packets
Method for the integration of additional data in digital data packets
