1
David W Payton: Virtual on-demand digital information delivery system and method. Hughes Aircraft Company, Georgann S Grunebach, Michael W Sales, Wanda K Denson Low, August 4, 1998: US05790935 (730 worldwide citation)

A digital information system delivers virtual on-demand information over existing, as well as the next generation, digital transport systems by offloading a portion of the systems' peak bandwidth requirements to the local subscribers. A collaborative filtering system synthesizes the preferences of a ...


2
Mustafa Eroz, Feng Wen Sun, Lin Nan Lee: Method and system for providing low density parity check (LDPC) encoding. The DirecTV Group, Georgann S Grunebach, March 13, 2007: US07191378 (173 worldwide citation)

An approach is provided for a method of encoding structure Low Density Parity Check (LDPC) codes. Memory storing information representing a structured parity check matrix of Low Density Parity Check (LDPC) codes is accessed during the encoding process. The information is organized in tabular form, w ...


3
Ronald E Sorace, Victor S Reinhardt, Clinton Chan: Phase array calibration orthogonal phase sequence. Hughes Electronics Corporation, Georgann S Grunebach, M W Sales, January 19, 1999: US05861843 (169 worldwide citation)

Methods and systems for calibrating an array antenna are described. The array antenna has a plurality of antenna elements each having a signal with a phase and an amplitude forming an array antenna signal. For calibration, the phase of each element signal is sequentially switched one at a time throu ...


4
Mustafa Eroz, Lin Nan Lee, Feng Wen Sun, Bob Cassagnol, Adam Von Ancken: Method and system for routing in low density parity check (LDPC) decoders. The DirectTV Group, Georgann S Grunebach, April 10, 2007: US07203887 (150 worldwide citation)

An approach is provided for decoding a low density parity check (LDPC) coded signal. Edge values associated with a structured parity check matrix used to generate the LDPC coded signal are retrieved from memory. The edge values specify the relationship of bit nodes and check nodes, and are stored wi ...


5
Craig A Finseth, Jeffrey A Brown, Philip E Hsiao, Robert G Arsenault: Method and apparatus for sharing viewing preferences. The DirecTV Group, Georgann S Grunebach, John A Crook III, November 2, 2004: US06813775 (148 worldwide citation)

A method, apparatus, and article of manufacture for sharing viewer preference information between a first user and a second user is disclosed. The method comprises the steps of storing first user viewer preference information characterizing media programs selected by the first user in a memory of a ...


6
Joseph Santoru: Method and apparatus for reducing interference between terrestrially-based and space-based broadcast systems. The DIRECTV Group, Georgann S Grunebach, December 13, 2005: US06975837 (145 worldwide citation)

A system and method for reducing interference between communications systems sharing at a portion of at least some allocated frequency bands is described. The system comprises a first communication system broadcasting on a first set of broadcast bands having guard bands therebetween, and a second co ...


7
Raynold M Kahn, Gregory J Gagnon, David D Ha, Peter M Klauss, Christopher P Curren, Thomas H James: Video on demand pay per view services with unmodified conditional access functionality. The DIRECTV Group, Georgann S Grunebach, John A Crook III, February 8, 2005: US06853728 (123 worldwide citation)

A system and method for storing and retrieving program material for subsequent replay is disclosed. The method comprises the steps of receiving access control information and the program material encrypted according to a first encryption key, the access control information including the first encryp ...


8
Irving Rabowsky, Richard E Sklar: Combined data, audio and video distribution system in passenger aircraft. Hughes Aircraft Company, Georgann S Grunebach, Terje Gudmestad, Wanda K Denson Low, February 22, 1994: US05289272 (123 worldwide citation)

A passenger aircraft video distribution system distributes modulated RF carrier signals from a central signal source (10) to be used at each passenger seat (S1, S2, S3). The carriers are modulated to contain both audio and video data (12,14) and also other digital data, such as graphics, slide shows ...


9
Wade J Stone, Kikuo Ichiroku, Edwin A Kelley, Don C Devendorf: Efficient digital frequency division multiplexed signal receiver. Hughes Aircraft Company, Georgann S Grunebach, Terje Gudmestad, W K Denson Low, October 5, 1993: US05251218 (122 worldwide citation)

A digital radio frequency (RF) or intermediate frequency (IF) receiver for frequency division multiplexed (FDM) signals contained in a predetermined FDM band including an RF amplifier, an RF bandpass anti-alias filter, and an analog-to-digital (A/D) converter. The sample frequency F.sub.s of the A/D ...


10
Robert G Arsenault, Kenneth D Seibert, Tam T Leminh: Electronic television program guide data naming system and method. Hughes Electronics Corporation, John A Crook, Georgann S Grunebach, April 27, 2004: US06728966 (111 worldwide citation)

Electronic television program guide information is downloaded, stored and searched by a local device. A plurality of linked lists are used to remove redundancy, increase search speed, and allow dynamic categories. When a new category is encountered a new head node for a link list data structure is c ...