US 6,643,238 B2 · Method of discriminating disk type and reproducing apparatus thereof

Abstract

A disk type discrimination method for optical disks is designed to function also with a DVD-RW of version 1.0, in which, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including a DVD-R can be maintained, and a reproducing apparatus thereof. When a medium loaded in a reproducing apparatus is judged as a DVD, by detecting the presence or absence of wobble, searching a control data zone if the wobble is not present, if present, searching an RW physical format information zone to confirm type information, if the type information is the DVD-RW, searching again the data area to perform reproduction, if the DVD-R, searching a control data zone to confirm the DVD-R, and then reproducing, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including the DVD-R is maintained.

Claims6

Dependent claims

A method of discriminating a disk type for discriminating the disk type between a first disk in which a first area in a lead-in area has an unreadable area and disk type information is recorded in a readable second area different from the first area, and a second disk in which disk type information is recorded in a readable first area in a lead-in area, said method comprising the steps of:

detecting the presence or absence of wobble at a predetermined position on a disk;
and
when said wobble is not detected, searching said first area to read said disk type information, and, when said wobble is detected, searching said second area to read said disk type information, thereby discriminating the disk type.

A disk reproducing apparatus capable of reproducing a first disk in which a first area in a lead-in area has an unreadable area and disk type information is recorded in a readable second area different from said first area, and a second disk in which disk type information is recorded in a readable first area in a lead-in area, said apparatus comprising:

a wobble detection section for detecting the presence or absence of wobble;
a disk type information read section for, when said wobble is not detected, searching said first area to read said disk type information, and, when said wobble is detected, searching said second area to read said disk type information;
and
a reproduction control section for performing a reproduction operation in accordance with said disk type information.

1 more element

Dependencies are inferred from the claim text.

Method of discriminating disk type and reproducing apparatus thereof

Life of this patent

Method of discriminating disk type and reproducing apparatus thereof

Life of this patent

Abstract

Claims6