Dynamic information storage or retrieval – Binary pulse train information signal – Format arrangement processing for auxiliary information
Reexamination Certificate
2001-01-12
2003-03-25
Edun, Muhammad (Department: 2653)
Dynamic information storage or retrieval
Binary pulse train information signal
Format arrangement processing for auxiliary information
C369S047100, C369S053100, C369S275300
Reexamination Certificate
active
06538969
ABSTRACT:
FIELD OF INVENTION
The present invention generally relates to a system and method for storing both open-format data and closed-format data, in multiple storage formats on a single storage medium, using a common indexing system. More particularly, the invention relates to a system and method for storing open and closed-format data on a storage medium, such that the open-format data can be accessed using both conventional and specialized hardware, whereas the closed-format data can only be accessed using specialized hardware capable of accessing data stored using multiple storage formats on a single storage medium for example using a common indexing system. More particularly still, the present invention relates to a system and method for storing open and closed-format data on optical storage media.
BACKGROUND OF THE INVENTION
There are various types of random access media, including storage media for computer hard drives, CDs (compact discs), and DVDs (digital videodiscs or digital versatile discs). Both CDs and DVDs are examples of optical storage media Each type of random access media conforms to a standard, which specifies the characteristics of a medium, including an ensemble of at least the physical structure, the sector format, and a file system for referencing the files on a given medium, hereinafter “ensemble”.
An example of an ensemble can be found in the DVD specification for Read-Only Disc published by Toshiba Corporation.
A second example of an ensemble can be found in the industry standard ISO/IEC 10149:1995, titled “Information technology—Data exchange on read-only 120 mm optical data disc (CD-ROM)”. This is known in the industry as the “Yellow Book” standard and describes physical and logical file formats for CD_ROM.
A third example of an ensemble can be found in the industry standard IEC 60908 Ed. 1.0 b:1987, titled “Compact disc digital audio system”. This is known in the industry as the “Red Book” standard and applies to a pre-recorded optical reflective digital audio disc system. The Red Book defines those parameters of compact discs that affect interchangeability between discs and players. It is also intended as a reference for manufactures wishing to produce discs.and/or players that conform to the system described in this standard.
A standard ensemble for a particular storage medium ensures interoperability among different hardware implementations for accessing data on the medium. For example, an optical disc DVD conforming to a open video specification and containing the correct video formatting can be played or read by any DVD player that was designed to play DVDs conforming to that open-format DVD specification. The general techniques for organizing ensembles on DVD media and the standards used are described in DVD Demystified, by J. Taylor, McGraw Hill (1988), Chapters 3 and 4 as well as the particular DVD specification.
It may be desirable, however, to store data using different formats, e.g. a combination of video, CD audio, and DVD formats, on the same storage medium. This involves the use of a new type of hybrid disk which may contain separate (differentiated) physical structures, sector formats, and file systems on the same media.
Furthermore, in order to control access to data, it may be desirable to design disks having data stored in differentiated formats so that only specialized hardware can read or play all of the data on these disks, while allowing open-format hardware to read or play only a select portion of the data on these disks. Such differentiated playback can be achieved by implementing separate playback methods whereby access to data is limited on a partition by partition basis. For example, by changing the order in which the data bytes are stored within each sector, or by using a different error correction code (ECC) algorithm, encapsulation barriers can be imposed. If data in a closed-format (CF) partition is recorded using a CF ECC, the DVD player must be specially equipped to process this CF ECC data. In order to create specialized content that is inaccessible to conventional open-format (OF) hardware, other methods to arrange data in a closed-format or to encrypt data can also be used.
A method for making a single CD-ROM disc useable on computers having unrelated operating systems or for multi-media platforms is described in U.S. Pat. No. 5,359,725, issued to Garcia et al. However, this patent exemplifies the use of a single disk on two different operating systems, i.e., the Hierarchical File System (IFS) used by Macintosh computers, or MS-DOS, the operating system used by IBM and compatible personal computers. This system, using the CD-ROM standard ensemble stores the MS-DOS files directly and translates the Macintosh files into MS-DOS files with corresponding data and resource forks. In operation, this system uses a common ISO file system in conjunction with a translation layer thereby allowing either a MS-DOS based system or Macintosh based system to access all the files.
A method for storing data on multiple optical disk volumes in an optical disk autochanger is described in U.S. Pat. No. 5,579,516 issued to Van Maren et al. This patent describes a method of accessing data from a large data base; the data base consisting of a plurality of optical disks in an autochanger, by using readily addressable directories. Therefore, in this system, a plurality of files contained on a plurality of disks may be accessed from a single area of meta-data, which includes directory information and file information.
However, none of these systems provide a method or apparatus for accessing both OF and CF data, which coexists and interoperates on a single medium. What is needed is a method and apparatus for reading and/or writing data on a single storage medium in both OF and CF data structures.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a single storage medium on which both open-format ensembles and closed-format ensembles co-exist.
It is another object of the invention to allow both open-format ensembles and closed-format ensembles to co-exist, and interoperate, on a single, hybrid storage medium.
It is another object of the invention to provide a method and apparatus for controlling access to data on random access storage media
It is yet a further object of the invention to permit enabled specialized hardware (e.g., a playback only system or a playback/write system) to access (i.e., read or read and write to) closed and open-format ensembles; wherein open-format hardware would be enabled to access only open-format data structures on that same media.
It is still a further object of the invention to allow specialized hardware to access data on a storage medium using either an open file system or an encapsulated (i.e., proprietary) closed-file system.
It is still a further object of the invention to allow open-format hardware to access data on a hybrid disc storage (i.e., a disc having both open-format and closed-format ensembles) medium using an open file system.
It is yet still a further object of the invention to provide a hybrid disc with a user message to inform the user that the disc is intended for play on a closed-system player when an attempt to play that disc on an open-format-only system player is attempted.
It is still a further object of the invention to provide a hybrid disc containing a multitude of different open and closed-format partitions, the number of partitions being limited only by the space on the disk.
It is still a further object of the invention to provide a disc and playback system wherein a user can manually select the content to be accessed when the user's hardware is capable of playing a multitude of ensembles on a hybrid disc.
In general, in one aspect, the invention features a file storage structure for storing open-format data and closed-format data on a file storage medium. The structure comprises an encapsulated file area on the file storage medium referencing a first set of data on the file storage medium, a non-encapsulated file area on the file storage medium referencing the
Baird Scott B.
Schumann Robert W.
Vitkus Richard A.
Devinsky Paul
Edun Muhammad
McDermott & Will & Emery
LandOfFree
System and method for implementing open and closed file... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for implementing open and closed file..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for implementing open and closed file... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3069980