Samsung Electronics Co., Ltd.

Yoon-woo Lee

Sung-hee Hwang

Kyung-geun Lee

Sung-hyu Han

In-sik Park

Ki-Hyun Kim

Ki-hyun Kim

Sang-Hyun Ryu

Young-im Ju

Joong-eon Seo

Hyun-jung Kim

Woo-sik Eom

Jae-seong Shim

Hyun-kwon Chung

Min-goo Kim

Jong-Sik Jeong

Byung-jun Kim

Seung-Min Lee

Young-yoon Kim

Jae-hong Lee

Gyu-hwan Jung

Sang-hyun Ryu

Kwang-man Ok

An apparatus and method for recording and/or reproducing data on a disc are provided using padding information, and a corresponding information storage medium. The recording method includes recording a recording unit block in which invalid data is padded in part of the block and recording padding information indicating that the invalid data is included. According to the method, a disc drive becomes able to distinguish valid data from invalid data in an error correction block such that reliability of reproduction increases and stability of the system is improved.

Apparatus and method for recording and/or reproducing data on an information storage medium using padding information, and the information storage medium

An apparatus and method for recording and/or reproducing data on a disc using padding information, and a corresponding information storage medium. The recording method includes recording a recording unit block in which invalid data is padded in part of the block and recording padding information indicating that the invalid data is included. According to the method, a disc drive becomes able to distinguish valid data from invalid data in an error correction block such that reliability of reproduction increases and stability of the system is improved.

Methods and apparatus for constructing a parity check matrix for use in a low-density parity check (LDPC) coding scheme are provided. The apparatus includes at least one index generator for generating row indexes of '1's, which indicate row positions of the '1's in each column of the parity check matrix, wherein the index generator is implemented by a modular shift register generator that generates a row index of a &#x201c;1&#x201d; at each clock.

Methods and apparatus for constructing low-density parity check (LDPC) matrix

A method of detecting address information for an optical recording and/or reproducing apparatus, including: detecting and/or correcting by using the characteristic of a medium when additional data has a specific value with respect to an area of the medium among address area data on the medium, and/or the characteristic of an address that the address increases by specified unit, an error in detected address area data and outputting the result of error detection and/or correction; and providing optimal address information by using the result of the error detection and/or correction.

Method and apparatus for efficiently detecting and/or correcting address information of optical recording/reproducing apparatus

A method of recording data includes forming a plurality of codewords by error correction coding a predetermined amount of inputted data according to a predetermined method, and recording the data including the plurality of codewords to the small-sized optical disc in a recording unit of a shorter length than a predetermined track of an inner circumference region of the small-sized optical disc.

Method of error correction coding, and apparatus for and method of recording data using the coding method

A soft demodulation method and apparatus including calculating partial sums for a unit of each predetermined number of bits of a codeword received from a channel; calculating a value of each entry of the decoding table by referring to the partial sums; and detecting a maximum among values of all entries of the decoding table and calculating a log-likelihood ratio (LLR) using the detected maximum. Accordingly, it is possible to reduce the amount of computation required to perform a soft demodulation process using run-length limited (RLL) codes and to simplify the soft demodulation process.

Soft demodulation method and apparatus

A method of converting a parity check matrix for low density parity check coding comprising moving rows and columns of the parity check matrix such that the parity check matrix includes a lower triangular submatrix. A calculation load for creating parity information can be reduced by using the converted parity check matrix including the lower triangular submatrix.

Method of converting parity check matrix for low density parity check coding

An error correction encoding method including generating error correction code data, which is a predetermined number of bytes long, by error-correction-encoding user data in a predetermined manner; generating burst indicator subcode data, which is a predetermined number of bytes long and is used to detect errors that have occurred in the user data; dividing the error correction code data into a plurality of sub-error correction code data each having a length that is less than the error correction code data; dividing the burst indicator subcode data into a plurality of sub-burst indicator subcode data having a length that is less than a minimal data unit that is error-correction-encodable; and alternately arranging the plurality of sub-error correction code data and the plurality of sub-burst indicator subcode data.

Error correction encoding apparatus and method and error correction decoding apparatus and method

An optical recording medium storing information for regarding data in the current sector as data in a linking loss area, and an apparatus and method providing linking data. The data link method includes dividing an error correction code block having a predetermined size into a plurality of sectors and checking data type identification information which indicates whether or not data in each sector is linking data; and replacing main data of a sector with predetermined data according to the result of checking the data type identification information. According to the above method, data type information is checked to determine whether or not to replace main data of the current sector with dummy data. By doing so, error occurrence of the prior art can be prevented and block error correction is carried out more effectively.

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Gyeonggi-do, South Korea

Yoon-woo Lee