North American Philips Corporation

Philips Electronics North America Corporation

Robert McFarlane

George C Kenney

Hugo J Strubbe

Eric J Frankfort

A system comprising a user interface which can access downloaded electronic shopping information, which can be continually updated and provided either 'over the air', over cable or satellite transmission paths or other 'fast data' paths, and automatically correlate this information with the preferences of the user, to create and display at least one personalized shopping information database based upon the results of the correlation.

System and method for automatically correlating user preferences with

Apparatus for recording data by means of a beam of radiation on a recording medium which upon exposure to the beam undergoes optically detectable changes in the form of pits, which apparatus includes means for reducing the beam intensity as a result of pit initiation thereby forming more accurate pits.

Apparatus for controlling the write beam in an optical data recording

A closed loop control system for an optical recording apparatus of the read after write type comprises a comparator for comparing the input data signal with a playback signal derived from the read beam which trails the write beam and is modulated by the data pattern inscribed on the recording medium by the write beam. The error signal generated by the comparator is applied to a controller which varies the modulation of the read beam in dependence on the error signal, for example, by modifying the data signal used to drive the write beam modulator. In this way, the control system compensates for nonuniformities in the recording medium and the like so as to ensure that the pattern inscribed by the write beam accurately represents the data to be stored.

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New Rochelle, NY, United States of America

Robert McFarlane