Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal level detecting using a reference signal
Reexamination Certificate
2008-05-06
2008-05-06
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal level detecting using a reference signal
Reexamination Certificate
active
07369476
ABSTRACT:
The present invention relates to a device for reading from and/or writing to optical recording media (1) having an optical scanner (2) for scanning the recording medium (1) by means of a light beam (3) and for generating scanning signals (HF) from the reflected beam (3), a data slicer (5) for converting a scanning signal (HF) output by the optical scanner (2) into a binary signal (HF″), an averaging unit (6) for forming an average value (M) from the scanning signal (HF, HF″) as input signal of the data slicer (5), and a control unit (14) for changing a parameter (T, OF) of the averaging unit (6). The object of the present invention is to propose a device of this type and also a suitable method therefor in which the average value (M) can be adapted to disturbances during the scanning of the recording medium. According to the invention, this is achieved by virtue of the fact that the control unit (14) has a unit (8, 10) for outputting a comparison value (S, HFN) and a comparator (7, 11) for comparing the average value (M) with this comparison value (S, HFN), and triggers a chance in the parameter (T, OF) in the event of the comparison value exceeded or undershot.
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Translation of the previously submitted Austrian Search Report.
Translation of the previously submitted German Search Report.
Kabutz Marten
Kravtchenko Alexander
Peytavin Bruno
Fried Harvey D.
Haley Joseph
Korzuch William
Laks Joseph J.
Thomson Licensing
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