The present invention provides a method of hierarchically modulating first and second digital data streams in a broadcast system such as an SDAR system that is compatible with legacy receivers. The second digital data stream, but not the first, is provided with a non-binary pseudo-random encoding. A...http://www.google.fr/patents/US20060276145?utm_source=gb-gplus-shareBrevet US20060276145 - Method to minimize compatibility error in hierarchical modulation using variable phase
Method to minimize compatibility error in hierarchical modulation using ...
Numéro de demande: 11/474,747 Numéro de publication: US 2006/0276145 A1 Date de dépôt: 26 juin 2006 Brevet délivré: US7657225 ( Date de délivrance 2 févr. 2010)
