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AssigneeKoninklijke Philips Electronics N.V.
InventorsJohn Harold-Barry, Xinyan Wu
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The present invention provides for an apparatus and method of controlling writing a signal to an optical disc in an optical disk system and including the step of generating a feedback signal to dynamically tune the signal output from a laser source, and including generating a plurality of timing signals serving to define a plurality of sampling windows for selecting data samples from RF signals derived from a signal reflected from the disc, generating a plurality of runlength selection signals to allow for measurement of light reflection at required runlength lands or pits, and measuring light reflected at a runlength land or pit in processing means and employing the measured signal as the said feedback signal for the said tuning of the signal source.
A method of controlling writing of a signal to an optical disc and including the step of generating a feedback signal to dynamically tune the source of the said signal, and further comprising the steps of generating a plurality of timing signals serving to define the plurality of sampling windows for selecting data samples from RF signals derived from the signal reflected from the disc, generating a plurality of runlength selection signals to allow for measurement of light reflection at required runlength lands or pits, and measuring light reflected at a run length land or pit in processing means and employing the measured signal as the said feedback signal for the said tuning of the signal source.
A write signal control apparatus arranged for controlling writing of data to an optical disc and comprising means for generating a feedback signal for dynamically tuning the source of the said signal, means for generating a plurality of timing signals serving to define a plurality of sampling windows, means for selecting data samples for RF signals derived from a signal reflected from the disc, means for generating a plurality of runlength selection signals arranged to allow for measurement of the reflection at a runlength land or pit, and, processing means for measuring the reflected signal at the run length land or pit, wherein the said measured signal serves as the said feedback signal for tuning the said signal source.
A method of controlling writing of a signal to an optical disc substantially as hereinbefore described with reference to, and as illustrated in the accompanying drawings.
Write signal control apparatus arranged for controlling writing of a data to an optical disc and substantially as hereinbefore described with reference to, and as illustrated in the accompanying drawings.
Dependencies are inferred from the claim text.