Method for recording wobble signals on an optical disc and...

Details Method for recording wobble signals on an optical disc and... Method for recording wobble signals on an optical disc and...

2008-04-15

2008-04-15

Patel, Gautam R. (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Format arrangement processing for auxiliary information

C369S044130

Reexamination Certificate

active

10310936

ABSTRACT:
After pre-coding bit data of address information to be recorded on an optical disc on the basis of at least 4 wobble units, wobble data pre-coded on at least 4 wobble units is modulated by a BPSK (Binary Phase Shift Keying) or ASK (Amplitude Shift Keying) method, and the modulated wobble data is alternately recorded on both sides of a land and/or groove of the optical disc. As a result, wobble signals, recorded on sides of signal tracks of a groove and a land, in consecutively repeated anti-phase, or having consecutively repeated different amplitudes, are avoided. There are no consecutively repeated zero-level sections in a push-pull signal, thereby minimizing performance degradation of a wobble PLL (Phase-Locked Loop) and a noise generated in a reproduction RF signal.

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