Information recording disc and information reproducing system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroshi Ueda, Yoshihisa Fukushima, Motoshi Ito, Shinji Sasaki
Life of this patent
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Abstract
An information recording disc has a burst cutting area (BCA) for recording control information for a reproducing apparatus be removing a reflective layer of the disc in a striped shape and a data recording area for recording user data. The burst cutting area includes at least one BCA control information area. The BCA control information area has an application identifier area for identifying applications of control data, a data length area for indication data length of the control data, and an application specific data area data area recording the control data. Also, an information reproducing drive reproduces data from the information recording disc.
Claims8
An information reproducing drive for reproducing data from a removable information recording medium for recording digital contents having copyright and disc region information indicative of a specific region permitting reproduction of the digital contents, the information reproducing device comprising:
- an installation region information storage means for storing installation region information for specifying a region in which the information reproducing drive is installed;
- a regional information setting counter which is updated each time the installation region information storage means is updated by a drive user;
- a manufacturer initialization counter which is updated each time the regional information setting counter is initialized by a drive manufacturer;
- a regional comparing means which delivers a regional coincidence signal upon detection through comparison that the disc region information read from the information recording medium is coincident with the installation region information stored in the installation region information storage means;
- a reproduction control means which reproduces the digital contents from the information recording medium only when the regional comparing means has delivered the regional coincidence signal;
- an initialization medium decision means for deciding whether or not the information recording medium is a drive manufacturer initialization medium;
- a regional information updating means which updates, upon receipt of a command of update of the installation region information from the drive user, the installation region information storage means and the regional information setting counter;
- and
- a manufacturer initialization means which, upon receipt of a command of drive manufacturer initialization from the drive manufacturer, initializes the regional information setting counter and updates the manufacturer initialization counter only when the initialization medium decision means decides that the information recording medium is the drive manufacturer initialization medium and a count of the manufacturer initialization counter is not an initialization limit value.
An information reproducing method using an information reproducing drive for reproducing data from a removable information recording medium for recording digital contents having copyright and disc region information indicative of a specific region permitting reproduction of the digital contents, the information reproducing method comprising:
- storing in an installation region information storage means installation region information for specifying a region in which the information reproducing drive is installed;
- updating a regional information setting counter each time the installation region information storage means is updated by a drive user;
- updating a manufacturer initialization counter each time the regional information setting counter is initialized by a drive manufacturer;
- delivering from a regional comparing means a regional coincidence signal upon detection through comparison that the disc region information read from the information recording medium is coincident with the installation region information stored in the installation region information storage means;
- reproducing the digital contents from the information recording medium only when the regional comparing means has delivered the regional coincidence signal;
- deciding whether or not the information recording medium is a drive manufacturer initialization medium;
- updating, upon receipt of a command of update of the installation region information from the drive user, the installation region information storage means and the regional information setting counter;
- and
- initializing the regional information setting counter and updating the manufacturer initialization counter upon receipt of a command of drive manufacturer initialization from the drive manufacturer only when the deciding operation decides that the information recording medium is the drive manufacturer initialization medium and acount of the manufacturer initialization counter is not an initialization limit value.
Dependencies are inferred from the claim text.