Inventor

WOO ARTHUR S

CA4 patents

Patents

4 patents

US5381481AJan 10, 1995

Method and apparatus for uniquely encrypting a plurality of services at a transmission site

SCIENTIFIC ATLANTA209 citations97

US5506904AApr 9, 1996

System and method for transmitting and receiving variable length authorization control for digital services

SCIENTIFIC ATLANTA163 citations96

US5425101AJun 13, 1995

System and method for simultaneously authorizing multiple virtual channels

SCIENTIFIC ATLANTA223 citations96

US5519780AMay 21, 1996

System and method for providing compressed digital teletext services and teletext support services

SCIENTIFIC ATLANTA235 citations95