Small cartridge free optical disc with high level of redundancy and tolerance for missing data

A kind of optical disc and data technology, applied in the field of read-only optical media, can solve the problems of expensive, etc., and achieve the effect of maintaining reliability and high read error rate

CN101536104AInactive Publication Date: 2009-09-16KONINKLIJKE PHILIPS ELECTRONICS NV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

In the invention, e-book information is distributed on un-cartridged small media that can be made cheaply enough for use in free distribution of information. The e-book information is encoded and stored on a read-only optical disc that is 2 to 4 cm in diameter and 0.6 to 1.2 mm thick, the information being encoded with sufficient redundancy and sufficient tolerance for missing information that the disc can be conveniently handled and pocketed without losing reliability of information access. The disc has a lead-in area that is prior to all the e-book information and that contains a disc navigation area, and a lead-out area that follows all the e-book information. The disc may include multiple partitions, each partition containing sufficient access information for independent access of the e-book information within the partition without accessing any other partition. Alternatively, the disc may include multiple slots for files and that are equally spaced. For example, to provide data redundancy, at least some of the partitions are duplicate partitions that contain all the same data as another duplicate partition, and the disc navigation area contains partition descriptors that indicate all the partitions and the areas allocated to each of the partitions, and the disc also includes duplicates of the partition descriptors, the duplicate partition descriptors being stored in the lead-in area or in the lead-out area to provide redundancy of navigation information.
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Description

technical field

[0001] The present invention relates to the field of read-only optical media for free electronic book distribution. Background technique

[0002] Today, newspapers (Metro, Spits, etc.) are distributed free of charge to commuters. Some CDs containing software like AOL Browser have been distributed for free. However, the cost of CD media and the necessary packaging to protect the media is so expensive compared to newspaper costs that there is no reason to distribute free e-books on CD media.

[0003] Those skilled in the art can refer to the following cited documents:

[0004] Application publication US2002 / 0112172 by Simmons discloses the distribution of electronic books on minidisks.

[0005] Patent EP0599765 to Anderson et al discloses redundant information on disk drives.

[0006] Here, the above-mentioned cited documents are incorporated by reference as a background art. Contents of the invention

[0007] In the present invention, low-cost, low-fide...

Examples

Embodiment Construction

[0025] figure 1 100 illustrates an exemplary embodiment of the method of the present invention for distributing e-book information. In step 102, the e-book information is encoded, and in step 104, the encoded e-book information is stored on a coil of spiral or circular tracks in a read-only optical disc having a diameter of 2 to 4 cm and a thickness of 6 to 1.2 mm, the encoded information has sufficient redundancy and sufficient tolerance for missing information so that the disc can be handled and carried without losing reliability of information access. The disc is then distributed free of charge to the public in step 106 without a cartridge.

[0026] Free distribution of e-book information to the public requires discs with very low production costs. Therefore, a disc with a cartridge (for example, SFFD) cannot be used. Because such a disk is not protected, the disk must provide a large amount of redundancy and tolerance against missing data.

[0027] The tray may be abou...