Optical information reproduction apparatus and optical informati

Details Optical information reproduction apparatus and optical informati Optical information reproduction apparatus and optical informati

1993-12-09

1996-03-12

Hajec, Donald T.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

360 32, G11B 500, H04N 576

Patent

active

054992265

ABSTRACT:
In an optical information reproduction apparatus, digital information recorded as an optical mark on an optical information recording medium is reproduced in the following manner. A light beam is applied to the recording medium, and the obtained reproduction signal is binarized. The binary reproduction signal is sampled by a sampling clock which is generated by a PLL control signal generator, and is synchronized with the binary reproduction signal so as to reproduce the digital information. The PLL control signal generator achieves synchronization based on the leading and trailing edges of a change point of the binary reproduction signal.

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