Koninklijke Philips Corporation N.V.

Sony Corporation

Matsushita Electric Industrial Co., Ltd.

Bart Van Rompaey

Aalbert Stek

Maarten Kuijper

Martinus Wilhelmus Blum

Jacobus Petrus Josephus Heemskerk

Josephus Arnoldus Henricus Maria Kahlman

Cornelis Marinus Schep

Shoei Kobayashi

Makoto Usui

Tamotsu Yamagami

Yuji Takagi

Coen Adrianus Verschuren

Hans Willem Van Kesteren

Willem Marie Julia Marcel Coene

Jeroen Jan Lambertus Horikx

Steven Broeils Luitjens

Josephus A H M Kahlman

Bart Michiel De Boer

Paulus Wilhelmus Maria Blom

Paulus Gijsbertus Petrus Weijenbergh

Andrei Mijiritskii

Frank Cornelis Penning

Peter Bentvelsen

Michael Adrianus Henricus Van Der Aa

An apparatus for reading out information from an information carrier includes a reading unit for reading out user information and access information from the information carrier. The user information are stored in a first region of the information carrier and the access information are stored in a second region of the information carrier. The apparatus further includes an access controller for providing access to the user information in dependence on the access information. The access information are stored in a first portion of the second region, and the dummy information are stored in a second portion of the second region according to a similar format as used for storing the access information.

Information carrier comprising access information

An apparatus generates outgoing data to be provided on an optical disk in a burst cutting area. The burst cutting area further comprises markings which cause a marking frequency spectrum when reading out the burst cutting area. The apparatus comprises a channel coder which receives processed data and supplies the outgoing data having an outgoing data frequency spectrum with suppressed DC-content. The apparatus further comprises a data processing device which generates the processed data to obtain an outgoing frequency spectrum wherein a frequency component causing interference with a low frequent component of the markings is suppressed or not present.

Detection of data in burst cutting area of optical disk

An information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method, detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique, the only way to obtain the access information is by knowing how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.

An apparatus for accessing an information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

An apparatus generates outgoing data (OD) to be provided on an optical disk () in a burst cutting area (). The burst cutting area () further comprises markings () which cause a marking frequency spectrum (MFS) when reading out the burst cutting area (). The apparatus comprises a channel coder () which receives processed data (PD) and supplies the outgoing data (OD) having an outgoing data frequency spectrum (DFS) with suppressed DC-content. The apparatus further comprises a data processing device () which generates the processed data (PD) to obtain an outgoing frequency spectrum (DFS) wherein a frequency component causing interference with a low frequent component of the markings () is suppressed or not present.

An information carrier for holding user information includes access information for accessing the user information, the access information being stored in a pre-determined first region on the information carrier. The information carrier further includes at least one further region different from the first region, the further region comprising dummy information.

To record specific information to a disk-shaped record medium and reproduce the recorded specific information without any influence on the error correction capability. Copy protection information (CPID) having an error correction code appended thereto, shuffled and otherwise treated is sent as a CPID bit block to an EDC rewrite circuit (). The EDC rewrite circuit () rewrites an error detection code appended to user data in each sector in accordance with bit information in the CPID bit block. Thereafter, the data in each sector is scrambled, and an ECC block including a plurality of sectors is modulated with an error correction code and sync signal appended thereto. The modulated signal is recorded in a reserve area of a lead-in area of the disk-shaped record medium. During reproduction, CPID is restored based on the result of error detection of each sector.

Disk-shaped record medium and producing method for same, disk recording method and device, and disk playback method and device

Information carrier comprising access information and dummy information

Detection of data in burst cutting areas of optical disk

The present invention relates to a drive for accessing an optical record carrier () comprising means () for determining the type of record carrier, in particular for distinguishing a read-only record carrier from a recordable or rewritable record carrier having a wobbled groove in the lead-in zone, said means comprising: a DPD measuring unit () for measuring the differential phase detection (DPD) signal, a PP measuring unit () for measuring the push-pull (PP) signal in case no DPD signal could be measured, a wobble locking unit () for locking, in case a PP signal could be measured, to the wobble embedded in said wobbled groove using a first and/or a second polarity setting, and an indication unit () for generating a first indication signal indicating that the record carrier is a read-only record carrier if a DPD signal could be measured and that the record carrier is a recordable or rewritable record carrier if no DPD signal but a PP signal could be measured and if locking to the wobble has been successful. In a further embodiment a second indication signal in generated indicating the type of polarity in case of a recordable or rewritable record carrier.

Drive and method for determining the type of optical record carrier

A method, an optical record carrier and an apparatus for writing information to an optical record carrier include reading a write strategy from the optical record carrier which has at least two write strategies, and forming pits and lands by controlling a radiation source with the read write strategy. The method further includes determining which of the at least two write strategies is the most optimal one by reading an indication present on the optical record carrier. The most optimal write strategy is used to form the pits and the lands. If an apparatus for writing information to an optical record carrier is capable of applying two or more write strategies stored on the optical record carrier, then the apparatus reads the indication and applies the write strategy which is the most optimal one.

Optical record carrier recording method, optical record carrier and apparatus for writing information

Devices and methods, record carrier and signal for embedding, extracting, carrying and representing secondary signal such as a copy protection signal embedded in a primary signal such as a blu ray disc signal modulated by a 17PP RMTR runlength limited modulation code. Each frame comprises a frame sync patterns followed by DC control blocks each including a DC control bit. Two modulation tables are used. Each bit of the secondary signal is represented by a relationship between the polarity of the frame sync signal and the values of the DC control bits in a fashion which complies with the constraints of the modulation code and the DC control algorithm.

Device and method for embedding a secondary signal in a primary data bit stream on an optical disc

An optical recording apparatus with a small form factor optical drive for driving an optical record carrier is operable in different accessing modes having different data rates depending on the power mode of the recording apparatus. A Switch is provided in the recording apparatus for switching a controller for accessing the optical record carrier for reading data from or recording data to the optical record carrier. A first accessing mode has a low data rate and is used in a low power mode, while a second accessing mode has a high data rate and is used or allowed to be used in a high power mode.

Optical record carrier recording apparatus

The present invention relates to magneto-optical recording technique whereby improved domain expansion reading is achieved. A mark region is recorded as a sub-mark portion and an adjacent sub-space portion, wherein the length of the sub-mark portion is set to be less than or equal to the length of the sub-space portion. Stray field variations due to different runlengths of the recording data can thus be equalized even for short channel bit lengths, while the resolution and/or power margin is improved.

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Eindhoven, Netherlands

Bart Van Rompaey