A method of encoding data in the visible portion of a transmitted video signal without degrading display of the received video signal, and for decoding the data in the received video signal. Each group of data bits to be transmitted, referred to a data symbol, is associated with one of a number of longer...http://www.google.fr/patents/US6229572?utm_source=gb-gplus-shareBrevet US6229572 - Method for transmitting data on viewable portion of a video signal
Method for transmitting data on viewable portion of a video signal
