Rishi Mohindra: Direct conversion receiver. U S Philips Corporation, Leroy Eason, August 1, 1995: US05438692 (121 worldwide citation)

A direct conversion receiver, such as a paging receiver includes a local oscillator for mixing down to baseband a received radio frequency signal having a carrier frequency which is digitally modulated (FSK). To provide automatic frequency control, instead of using a control loop, the present invent ...

Alfons Eizenhoffer, Hans Gorg Preller: Digital radio transmission system. U S Philips, Thomas A Briody, Leroy Eason, January 17, 1989: US04799252 (118 worldwide citation)

A cellular digital radio transmission system which increases the number of available communication channels between base stations and mobile stations in such system. Message transmission from a base station to its assigned mobile stations is effected by a combination of time-division, code-division ...

Raymond N J Veldhuis, Gerrit J Keesman: Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words. U S Philips Corporation, Leroy Eason, September 8, 1992: US05146457 (117 worldwide citation)

A system for transmitting digitized analog information includes, for the purpose of transmitting an additional information signal apparatus for modifying the bit of low significance of every n-th data word representing the digitized information depending on the bits of an additional information sign ...

Christopher K Davis, Paul J Stein, Diana M Ball: Multiple-access communications system. U S Philips Corporation, William J Streeter, Leroy Eason, September 16, 1986: US04612637 (117 worldwide citation)

A multiple-access communications system for an unlimited user population wherein a system controller continuously transmits Aloha signals on a slot-by-slot basis giving an updated number of time slots available whereby a calling party can select any one of the designated time slots at random. The ca ...

Peter J Mabey, Roman Mervart: Method of data communication. U S Philips Corporation, Leroy Eason, December 4, 1990: US04975952 (113 worldwide citation)

A method of data communication, particularly for long data messages, is disclosed. The data code words of a message are arranged in segments, each with its own header, and are assigned message and segment identification. A receiver reconstructs the data message segment by segment and, in the non-gro ...

Peter G Baltus, Pieter S van der Meulen: Data transmission system and apparatus providing multi-level differential signal transmission. North American Philips Corporation, Leroy Eason, November 24, 1992: US05166956 (109 worldwide citation)

A data transmission system which provides differential transmission of a multi-level interface corresponding to a binary interface formed by a plurality of binary input signals. The binary interface is encoded by an encoder into a corresponding multi-level differential interface formed by a pluralit ...

Brian C Johnson, Michael A Epstein: Multi-processor video display apparatus. North American Philips Corporation, Leroy Eason, March 14, 1995: US05398315 (106 worldwide citation)

Video display apparatus having multiple processors for operation in parallel, each processing a respective complete video image in the sequence of video images (fields or frames) which form a video picture, the processing being in accordance with a selected signal processing algorithm. The algorithm ...

Jacques F Gerrissen, Jozeph P M Van Itegem, Johannes R H Daamen, Jaap J De Boer: Data processing system using gesture-based input data. U S Philips Corporation, Leroy Eason, June 7, 1994: US05319747 (105 worldwide citation)

A data processing system having a hand-gesture based display, user communication through the system and interaction with the system being effected by inputting of data signified by a hand code which includes representations of commonly understood natural hand gestures. This enables such communicatio ...

Antoine Chouly, Americo Brajal, David Gianella: Trellis coded QAM using rate compatible, punctured, convolutional codes. U S Philips Corporation, Leroy Eason, April 18, 2000: US06052821 (99 worldwide citation)

A digital transmission system provides selective protection by combining a convolutional coding, a punctured coding and a digital quadrature amplitude modulation. The rate of the convolutional coding in N/2N and the modulation uses a 2.sup.2N -point constellation, with N>1.

Wilhelmus P M Raaymakers, Franciscus L J M Kuijpers: Optically readable record carrier for recording information, apparatus for manufacturing such a record carrier, apparatus for recording information on such a record carrier, and apparatus for reading information recorded on such a record carrier. U S Philips Corporation, Leroy Eason, June 11, 1991: US05023856 (96 worldwide citation)

An optical disc record carrier having a radiation-sensitive surface and a spiral or concentric pattern of information tracks thereon. The radial displacement of each track is modulated to produce a periodic radial wobble, the frequency of such periodic displacement being modulated by a position-info ...