A system is presented for two-way digital multimedia broadcast services, enabling a variety of interactive and other applications. These applications include: navigation from one video program to another by selection of objects in the current video; creation and transmission of records of user viewing...http://www.google.es/patents/US6298482?utm_source=gb-gplus-sharePatente US6298482 - System for two-way digital multimedia broadcast and interactive services
System for two-way digital multimedia broadcast and interactive services
