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AssigneesSony Corporation, Matsushita Electric Industrial Co., Ltd., Koninklijke Philips Electronics N.V.
InventorsShoei Kobayashi, Susumu Senshu, Tamotsu Yamagami, Makoto Usui, Hideshi Ishihara, Mitsurou Moriya, Cornelis Marinus Schep, Jakob Gerrit Nijboer, Aalbert Stek
Estimating the term…
Four ECC blocks are recorded in a burst cutting area of an optical disc. Each ECC block is constituted by a BCA content code of 1 byte, content data length of 1 byte, and content data of 14 bytes. Of the BCA content data, the leading 6 bits are used for application ID and the remaining 2 bits are used for block number. Disc ID is stored in the content data. Since the four ECC blocks exist, the optical disc can be managed individually by four applications at the maximum. Thus it becomes possible to manage the same optical disc by a plurality of applications.
An information reproducing device for reproducing main data from a disc recording medium having a data area in which the main data is recorded and a burst cutting area in which auxiliary information is recorded as a plurality of error correction blocks each having a header added thereto, the header including a content code of an application identification number and a block number, the device comprising:
An information reproducing method for an information reproducing device which reproduces main data from a disc recording medium having a data area in which the main data is recorded and a burst cutting area in which auxiliary information is recorded as a plurality of error correction blocks each having a header added thereto, the header including a content code of an application identification number and a block number, the method comprising:
A computer implemented method for an information reproducing device which reproduces main data from a disc recording medium having a data area in which the main data is recorded and a burst cutting area in which auxiliary information is recorded as a plurality of error correction blocks each having a header added thereto, the header including a content code of an application identification number and a block number, the method comprising:
An information reproducing device for reproducing main data from a disc recording medium having a data area in which the main data is recorded and a burst cutting area in which auxiliary information is recorded as a plurality of error correction blocks each having a header added thereto, the header including a control content code of an application identification number and a block number, the device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
This invention relates to an information recording device and method, an information reproducing device and method, a recording medium, a program, and a disc recording medium, and particularly to an information recording device and method which enables recording of a plurality of disc IDs, an information reproducing device and method, a recording medium, a program, and a disc recording medium.
As a disc recording medium on which, for example, digital data such as a high-quality digital video signal is optically recorded, a playback-only DVD (digital versatile disc or digital video disc) has been broadly known. Moreover, as disc recording media which enable writing once or rewriting by using the DVD format, a DVD-R (DVD-recordable), a DVD-RW (DVD-rewritable) and a DVD-RAM (DVD-random access memory) are being popularized.
Furthermore, a next-generation optical disc is to be commercialized which can realize a large capacity of approximately more than 23 gigabytes with a track pitch of 0.32 μm, a scanning density of 0.12 μm/bit and a diameter of 120 mm, by using a combination of a blue laser beam with a wavelength of 405 nm and an objective lens with NA of 0.85. With respect to this next-generation optical disc, a recording layer is formed on a substrate, and a transparent cover layer with a thickness of approximately 0.1 mm is formed on the recording layer. The transparent cover layer has an excellent optical characteristic and it is hard-coated so as to be scratch-proof, for example. The laser beam is cast onto the recording layer via the transparent cover layer having the above-described thickness of 0.1 mm.
FIG. 1 shows a disc format of an optical disc to which the present invention is applied.
FIG. 2 illustrates 4/1 modulation.
FIG. 3 illustrates the relation between a channel and a mark.
An embodiment of the present invention will now be described with reference to the drawings.
An embodiment of the disc recording medium according to the present invention is a next-generation optical disc which can realize a large capacity of more than 23.3 gigabytes with a diameter of 120 mm. With respect to this next-generation optical disc, a recording layer is formed on a substrate, and a transparent cover layer with a thickness of 0.1 mm is formed on the recording layer. For recording and reproducing content data, for example, a blue-violet laser beam with a wavelength of 405 nm is condensed by an optical pickup with a numerical aperture set at NA=0.85 and is cast onto the recording layer via the transparent cover layer having a thickness of 0.1 mm.
FIG. 1 shows the disc format of an optical disc 1 to which the present invention is applied. A burst cutting area (BCA) 1A is concentrically formed in a range from a radium of 21.3 mm to a radius of 22.0 mm on the outer side (in this example, on the inner side) of a data area 1B where content data (such as AV data) is recorded, on the inner circle of the optical disc 1. In this BCA, auxiliary information including attribute information such as disc ID information proper to the disc is recorded over 4648 channels, of 4750 channels (channel bits) per circle.
Arrangement of the information on the record carrier, e.g. form of tracks , actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped;…:…
Signal processing not specific to the method of recording or reproducing; Circuits therefor: circuits for prevention of unauthorised reproduction…
Involving measures which result in a restriction to authorised record carriers: wherein the record carrier stores a unique medium identifier
Circuits for prevention of unauthorised reproduction or copying, e.g. piracy: involving encryption or decryption of contents recorded on or…
Term ended 23 Sep 2023 (estimated)