Koninklijke Philips Corporation N.V.

Sony Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

U.S. Philips Corporation

Koninklijke Philips Electronics N.v.

Koninklijke Phillips Electronics N.v.

Cornelis Marinus Schep

Aalbert Stek

Shoei Kobayashi

Tamotsu Yamagami

Jacobus Petrus Josephus Heemskerk

Jakob Gerrit Nijboer

Makoto Usui

Mitsurou Moriya

Hideshi Ishihara

Susumu Senshu

Shigeru Furumiya

Hiromichi Ishibashi

Constant Paul Marie Jozef Baggen

Josephus Arnoldus Henricus Maria Kahlman

Maarten Kuijper

Martinus Wilhelmus Blum

Bart Van Rompaey

Sebastian Egner

Shinichi Tanaka

Hiroshi Ogawa

Jun Nakano

Nobuyoshi Kobayashi

Hendrik Van Houten

Theodorus Petrus Henricus Gerardus Jansen

Jacques Heemskerk

Takashi Ishida

Shinya Abe

Shin-ichi Kadowaki

Junichi Minamino

Shin-ichi Tanaka

Shin Masuhara

Bin Yin

Josephus A H M Kahlman

Tatsushi Sano

Mohammed Meftah

Johannis Friso Rendert Blacquiere

Jacobus P J Heemskerk

Hermanus Johannes Borg

Martinus A Gijs

Koen Vanhoof

Alexander Padiy

Shinichiro Ilmura

Shinya Matsushita Electric Industrial Col Ltd Abe

Shin-Ichi Matsushita Electric Industrial Co Ltd Tanaka

Jun c/o Sony Corporation Nakano

Tamotsu c/o Sony Corporation Yamagami

Susumu c/o Sony Corporation Senshu

Shoei c/o Sony Corporation Kobayashi

Shin-Ichi Kadowaki

Shin-Ichi Tanaka

Jacobus Petrus Heemskerk

A record carrier has a servo track indicating an information track intended for recording information blocks. The servo track has a variation of a physical parameter, referred to as wobble. The wobble is modulated for encoding record carrier information, such as addresses. The servo track is subdivided in modulated parts in which the frequency and/or phase of the variation deviates from the wobble frequency, and non-modulated parts. The slope of the wobble is substantially continuous at transitions between the modulated and non-modulated parts by using wobbles starting at the maxima or minima of the wobble in a first part of the modulated parts.

Record carrier and apparatus for scanning the record carrier

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

A method of encoding user data into codevectors of an error correcting code, includes generating a first block of data symbols including user data symbols and dummy data symbols; encoding the first block using an ECC encoder to obtain a codeword comprising the first block of data symbols and a second block of parity symbols; and generating a codevector by selecting a user data portion of the user data symbols from the first block and a parity portion of the parity symbols from the second block. The sum of a number of the user data portion and a number of the parity portion is smaller than the sum of a number of the user data symbols and a number of the parity symbols of the second block.

Device for encoding and decoding using smaller block of symbols

The invention relates to a method of encoding user data into codevectors and to a corresponding method of decoding codevectors into user data. In order to be able to use the same ECC decoder for decoding of more than one type of data a method of encoding is proposed comprising the steps of:

Method of encoding and decoding

A record carrier has a servo track indicating an information track intended for recording information blocks, which servo track has a variation of a physical parameter, referred to as wobble. The wobble is modulated for encoding record carrier information, such as addresses. The servo track is subdivided in non-modulated and parts modulated parts in which the frequency and/or phase of the variation deviates from the wobble frequency. The slope of the wobble is substantially continuous at transitions between the modulated and non-modulated parts by using wobbles starting at the maxima or minima of the wobble.

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.

A record carrier () has a servo track () indicating an information track () intended for recording information blocks. The servo track () has a periodic variation of a physical parameter at a predetermined frequency, usually called wobble. The servo track has modulated parts for encoding position information according to a predetermined type of modulation. The record carrier includes a management area in which the servo track includes permanent data. The permanent data is encoded using a different type of modulation, but using the variations of the same physical parameter. Direct digital modulation () is proposed for the different type of modulation.

Record carrier having a servo track with position information in accordance with a modulation type and permanent information in accordance with a different modulation type, and apparatus for scanning the record carrier

An optical record carrier () includes an area () for storing user information and an area () for storing control information. The control information is arranged in a block of frames of equal length. The block includes an identification of the total number of frames in the block.

Record carrier and scanning device

An ECC block is constituted by RS(248,216,33). Of a data length of 216 bytes (symbols), only 16 bytes are allocated to BCA data and the remaining 200 bytes are used for fixed data having a predetermined value. Using the fixed data of 200 bytes and the BCA data of 16 bytes, parities of 32 bytes (symbols) are calculated. Only the BCA data of 16 bytes and the parities of the former 16 bytes of the 32-byte parities, that is, a total of 32 bytes only, are recorded in a burst cutting area of an optical disc. In decoding, error correction processing is carried out by using the fixed data of 200 bytes. The unrecorded parities of 16 bytes are processed as having been erased. Thus, the error correction capability in a burst cutting area of an optical disc can be improved.

Information recording device and method, information reproducing device and method, recording medium, program, and disc recording medium

Detection of data in burst cutting areas of optical disk

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.

Information recording disc, recording and/or reproducing device and method

An ECC block is constituted by RS(248, 216, 33). Of a data length of 216 bytes (symbols), only 16 bytes are allocated to BCA data and the remaining 200 bytes are used for fixed data having a predetermined value. Using the fixed data of 200 bytes and the BCA data of 16 bytes, parities of 32 bytes (symbols) are calculated. Only the BCA data of 16 bytes and the parities of the former 16 bytes of the 32-byte parities, that is, a total of 32 bytes only, are recorded in a burst cutting area of an optical disc. In decoding, error correction processing is carried out by using the fixed data of 200 bytes. The unrecorded parities of 16 bytes are processed as having been erased. Thus, the error correction capability in a burst cutting area of an optical disc can be improved.

An optical disc mediumhaving a wobbled track grooveincludes three wobble patterns including a flat wobble pattern, a positive pulse wobble pattern, and a negative pulse wobble pattern. In the flat wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is zero such that the track groove is flat. In the positive pulse wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is positive such that the track groove is wobbled in a first direction perpendicular to the lengthwise direction. Further, in the negative pulse wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is negative such that the track groove is wobbled in a second direction opposite to the first direction. Then, three data values can be recorded using three distinctive wobble patterns.

Optical recording medium having first and second wobble patterns

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Eindhoven, Netherlands

Cornelis Marinus Schep