摘要:
This invention relates to an optical disk writing and printing apparatus comprising; a motor operatively connected to an optical pickup unit and an optical print head such that the motor is engagingly connected to the optical pickup unit for assisting the optical pickup unit in writing data on one side of an optical disk and engagingly connected to the optical print head for assisting the optical print head in printing markings on another side of the optical disk.
摘要:
A method for error detection and correction comprising performing a first modulation error scan of said modulation symbol, marking data that fails to comply with a predetermined criteria, demodulating said modulation symbols, computing a first error syndrome using said demodulated symbols, and correcting errors using said error syndrome computation.
摘要:
A method comprising; installing a written media that contains marks and un-written areas, scanning the written marks and un-written areas concurrently, and determining the quality of the marks by determining a delta optical density.
摘要:
A system provides a signal to an actuator within an optical pickup unit of an optical disk drive. In one implementation, SUM signal data (an output from the quad sensors typically present in the optical pickup unit) is recorded within a SUM table. An error term generator processes the SUM signal data from the SUM table to produce an error term. An actuator control signal generator generates a signal to control movement of the actuator, wherein the signal is a function of a prior actuator position, the error term and an adaptation coefficient, wherein the adaptation coefficient impacts a rate at which the error term is allowed to modify the prior actuator position.
摘要:
A method of focus control is disclosed. In a passing action, a light source beam is passed over a reflectivity change on a storage media. In a determining action, a change time of a reflectivity step function is determined. In another determining action, a current light source spot size is determined using the change time and a storage media velocity.