Koninklijke Philips Corporation N.v.

Koninklijke Phillips Electronics N.v.

Ronald Marcel Tol

Pieter Bas Ijdens

Robert Jochemsen

Gerrit H Soepenberg

Gerrit Jan Scholl

Nicolaas Lambert

Antonius Adriaan Maria Staring

Wilhelmus Jacobus Van Gestel

Johannes Henricus Maria Korst

Adrianus Johannes Maria Denissen

Octavius John Morris

Steven Broeils Luitjens

Hong Li

Edwin A Montie

Johannis Friso Rendert Blacquiere

Alexis Stephen Richard Ashley

Timothy J Everett

Marcel Lambertus Leonardus Bijsterveld

Johannis Frisco Rendert Blacquiere

In a method for providing copy-protection services on a storage medium (for instance a solid state memory module), the data are arranged in sectors to which a field (S4T) is associated, where said field contains a random value Rwhich is changed randomly when writing data to said sector. By encrypting the data stored on the medium using a key which depends critically on said random numbers, bit-by-bit copies (apart from said random numbers, which can not be deterministically changed by an application) to a second storage medium or recopies from some intermediate storage medium, can not be decrypted because the values of said random numbers will have changed, thus preventing unauthorized duplication and replay attacks.

Method and system for providing copy-protection on a storage medium and storage medium for use in such a system

A method of acquiring repetitively broadcast data comprises acquiring the data in fragments, acquiring a document comprising information on the fragments, examining the information, and re-acquiring the fragments according to the information.

Identification of changes in broadcast database

A transmission system in which the transmitter () transmits a multiplex signal () to the receiver (). The multiplex signal includes a periodically repeated plurality of modules () which each comprise at least one object (). The receiver comprises extracting means () for extracting objects from the multiplex signal. The extraction is performed based on module related information which is included in the multiplex signal.

Transmission of a multiplex signal comprising a carousel having a plurality of modules

A method, a device and a system of performing error correction of stream data on a data medium using an information file. The stream data can be AVI, MPEG and stream data with file offset. The data medium can be a DVD+RW, a SVCD or a memory. The method includes the steps of determining () whether an error exists in the stream data on the basis of the information file and the stream data; determining () a file offset of the error in the stream data on the basis of the information file and the stream data; determining () the size of erroneous data in the stream data on the basis of the information file and the stream data; and inserting () correction data in stream data. Clock references and characteristic points in the information file are used to link to file offsets in the stream data. Erroneous data is replaced by correction data at the file offset with the correct size. Replaced data can also be a flag or it can be decided to replace with dummy data. The method can be executed during recording or playback of stream data.

Error correction of stream data

A system () like a video on demand server has a storage medium () with a number of files () from which data can be fetched or in which data can be stored. A file contains a number of clusters () and each cluster contains a number of storage sectors () that are physically successively organized on the storage medium. When a new stream is requested, either for reading or writing, a block size () is determined for the new stream. The block size is large enough to support the rate of the stream and is chosen such that a cluster can be read with an integer number of blocks by evenly partitioning the size of the cluster into the size of the blocks reading the cluster.

System for and method of accessing blocks on a storage medium

The invention relates to a method and devices for storing and reading data () on a storage medium (). In order to allow compatibility between different file systems (JAFS, UDF) data structures are stored in a first administrative area () as belonging to the first file system (JAFS) and a second administrative area () belonging to the second file system (UDF). Thus, a so-called bridge disc is achieved that may be read in the different file systems.

Method and devices for storing and reading data on a storage medium in accordance with at least two file systems, and storage medium for use in at least two file system

In a method and a device for reading and a method and a device for recording files on a sequential medium as well as the sequential medium itself, in order to enable the use of sequential write-once mediums, the file system descriptor pointing to a current version of a management information area, is recorded on a reserved track being located at the beginning of the volume. Thereby, the management information area is recorded at a location behind files being recorded onto the volume.

Methods and devices for recording or reading files on/from a sequential medium and sequential medium

Systems () that can play real-time audio and/or video often have strict timing constraints for reading, processing and playing the data. However, when data is corrupt or sectors from a data carrier () are incorrect, the system tries to recover from the corrupt data. In order to prevent that the corrupt data causes the system to miss its timing requirements, the current invention administrates the corrupt sectors of the data carrier () and conceals the corrupt data from the application by returning predefined data instead of the corrupt data. Furthermore, the current invention maintains a mapping of logical file blocks to the corrupt sectors to prevent a drive from trying to read the corrupt data.

Method of and a system to play a media file

A storage file system is provided for data stored on a storage medium, and particularly for storage of data on optical disc storage medium. Each successive or alternate file of data included in the storage medium is represented by a respective allocation extent list with each allocation extent identifying locations of data segments for each file. Data in some data segments or portions of data segments may be shared by two or more files with each file having a respective allocation extent list entry referencing that segment and each such allocation extent maintaining byte-accurate pointers to the start and end of the data relevant to each file within the data segment. An allocation space table containing respective entries for each reference to a data segment or portion of a data segment, and optionally a free-space table identifying those data segments or portions of data segments available for rewriting, may be provided to allow for rapid reclamation of free within the storage medium.

File systems supported data sharing

The transmission system comprises a transmitter ( ) and a receiver ( ). The transmitter ( ) can transmit a number of multiplex signals ( ) to the receiver ( ). The receiver ( ) comprises storage means ( ) for storing data sections included in the multiplex signals ( ) in dependence on information present in the multiplex signals ( ). The information for the complete set of multiplex signals ( ) is contained in a single information section in at least one of the multiplex signals ( ).

Transmission system

A file management system is provided which enables the peaceful coexistence of two or more file systems from different applications ( ) on the same medium ( ). Available free space can be assigned to each of the file systems. Static partitioning of the medium in fixed sized parts is not necessary, as partition sizes can be dynamically changed.

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Eindhoven, Netherlands

Ronald Marcel Tol