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AssigneeKoninklijke Philips Electronics N.V.
InventorsStefan Hendrik Guillaume Steven, Omar Shareef Malik, Hendrikus Albertus Johanna Looijmans, Bert Knoors
Estimating the term…
A method for detecting a mechanical shock affecting on optical disc drive based on using the Focus Error (FE) and/or the Tracking Error (TE) servo-loop signals. An shock detection signal is generated as weighted time-integral of the servo loop signal, for example by using the integral signal of the PID controller of the servo loop, or a low pass filter, or digital integration by a Digital Signal Processor (DSP). A shock is considered to be detected if the shock detection signal exceeds a threshold value. A method for recording data onto an optical disc and the corresponding optical disc drive are also disclosed. The shock signal is monitored real time and the recording is interrupted if a shock is detected. The recording is resumed by linking from the last recorded area when the shock signal becomes low again.
A method for detecting a mechanical shock affecting an optical disc drive during reading or recording information onto an optical disc, the optical disc drive comprising a lens system used in reading or recording information from the optical disc, servo means for controlling the positioning of the lens system relative to the optical disc, the servo means generating servo signals, the method comprising steps of
An apparatus for recording data onto an optical disc, comprising
Dependencies are inferred from the claim text.