High horizontal spatial frequency information may be transmitted through a limited bandwidth channel by means of spatial-temporal frequency interleaving techniques. To transmit both frequency interleaved high horizontal spatial frequency information and diagonal spatial frequency information in one video...http://www.google.fr/patents/US4621287?utm_source=gb-gplus-shareBrevet US4621287 - Time-multiplexing of an interleaved spectrum of a television signal
Time-multiplexing of an interleaved spectrum of a television signal
