DVD-RAM disc discriminative reproducing device

Details DVD-RAM disc discriminative reproducing device DVD-RAM disc discriminative reproducing device

2006-11-08

2010-10-12

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044290, C369S053310, C369S053370, C369S059150

Reexamination Certificate

active

07813253

ABSTRACT:
The gain controlling portion sets a gain of an RF amplifier to a maximum range when an activation process starts for an optical disk. The binary process condition setting portion sets an upper threshold level and a lower threshold level corresponding to 80% of upper and lower levels of the maximum range as the binary process condition for the binary process portion. A vacant part without a signal between the upper threshold level and the lower threshold level corresponds to a part of a CAPA signal. The binary signal ratio calculating portion measures a time period of a binary signal from a binary process portion that performs a binary process on the vacant part, and it calculates a binary signal ratio indicating a ratio of the time period of the binary signal to a time period corresponding to one rotation of the optical disk. The disk discriminating portion determines that the loaded optical disk is a DVD-RAM if the binary signal ratio is a value within the range of 4±1 %.

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patent: A-2004-046977 (2004-02-01), None
patent: A-2005-038514 (2005-02-01), None

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