1
Arthur S Woo, Wayne S Sheldrick, Gary W C Chan: System and method for simultaneously authorizing multiple virtual channels. Scientific Atlanta, Banner Birch McKie & Beckett, June 13, 1995: US05425101 (131 worldwide citation)

A decoder in a multiservice communication system receives a plurality of services as data streams, including video, audio, teletext, and utility data, multiplexed in sequence of frames. Each service defines a virtual channel. Virtual channel packets contained in the multiplex include information for ...


2
Arthur S Woo, Wayne S Sheldrick, Keith B Gammie, Hrad Hekimian: System and method for providing compressed digital teletext services and teletext support services. Scientific Atlanta, Banner & Allegretti, May 21, 1996: US05519780 (122 worldwide citation)

A teletext system provides teletext services and teletext support services in a multiservice communication system. Multiplexed data streams for a plurality of services, including teletext data, are transmitted in a sequence of frames between a transmitter location and a receiver location. Teletext i ...


3
Keith Gammie, Wayne S Sheldrick, Arthur S Woo, Anthony J Wasilewski: Method and apparatus for uniquely encrypting a plurality of services at a transmission site. Scientific Atlanta, Woodcock Washburn Kurtz Mackiewicz & Norris, January 10, 1995: US05381481 (108 worldwide citation)

Methods and apparatus are described for uniquely encrypting a plurality services at a transmission site and for decrypting selected services at a reception site while reducing the amount of encryption related information that must be transmitted to the reception site for decryption purposes. A uniqu ...


4
Wayne S Sheldrick, Keith B Gammie, Arthur S Woo, Gary W C Chan: System and method for transmitting and receiving variable length authorization control for digital services. Scientific Atlanta, Banner & Allegretti, April 9, 1996: US05506904 (91 worldwide citation)

Authorization information, such as blackout and spotlight regions, circular blackout and spotlight regions, and tier pointers, may be transmitted from an encoder to a decoder in a plurality of sessions of data frames. By spreading the authorization information over a plurality of sessions, more spac ...


5
Keith Gammie, Wayne S Sheldrick, Arthur S Woo: Method and apparatus for uniquely encrypting a plurality of services at a transmission site. Scientific Atlanta, YU MENG, August 7, 1996: CN94192987

Authorization information, such as blackout and spotlight regions, circular blackout and spotlight regions, and tier pointers, may be transmitted from an encoder to a decoder in a plurality of sessions of data frames. By spreading the authorization information over a plurality of sessions, more spac ...