Samsung Electronics Co., Ltd.

Kiu-hae Jung

Jae-seong Shim

Hyun-Soo Park

Ki-hyun Kim

Kyung-geun Lee

Jin-Han Kim

Iqbal Mahboob

Joo-Ho Kim

Igbal Mahboob

Chong-sam Chung

Ki-Hyun Kim

In-oh Hwang

Jin-Kyung Lee

Hyun-ki Kim

An information storage medium has user data areas and additional data areas, and sync patterns to distinguish the additional data areas from the user data areas. The information storage medium includes a user data area in which user data is recorded and an additional data area located in at least one of areas before and after the user data area. Second sync patterns used in the additional data area are different from first sync patterns used in the user data area.

Information storage medium and method of recording/reproducing the same

In a data demodulating method and apparatus, and a code arranging method, a multiplexer multiplexes an input data stream divided by a predetermined length into a plurality of types of pseudo-random data streams using multiplexed information of predetermined bits by applying a predetermined multiplexing method to each of the pseudo-random data streams. An encoder RLL-modulates the plurality of types of pseudo-random data streams to create a modulated code stream including a minimum of DC components. The multiplexer generates the random data streams by inconsecutively scrambling the input data stream using the multiplexed information. The encoder weak DC-free RLL-modulates each of the multiplexed data streams without using a DC control sub code conversion table to which additional bits are added and provides a code stream including a minimum of DC components among multiplexed, RLL-modulated code streams.

Data modulating method and apparatus, data demodulating method and apparatus, and code arranging method

Information storage medium having additional data areas and method of recording/reproducing the same

A method of recording information on and/or reproducing information from an information storage medium that includes a user data area in which user data is recorded and which has first sync patterns and an additional data area located in at least one of areas before and after the user data area includes forming second sync patterns used in the additional data area which are different from the first sync patterns used in the user data area.

Method of recording information on and/or reproducing information from information storage medium including user data area having first sync patterns and additional data area having second and third sync patterns different from each other and from the first sync patterns

A data reproducing method reproducing data recorded in a super resolution information storage medium in a form of marks having magnitudes less than a resolving power of an incident light beam, and an apparatus thereof. The data reproducing method includes irradiating a first beam having a resolving power causing a super resolution phenomenon and a second beam having a resolving power not causing a super resolution phenomenon into different places on the information storage medium, detecting a first reproduction signal based on the first beam and a second reproduction signal based on the second beam, and compensating for and calculating a temporal delay between the first reproduction signal and the second reproduction signal. Therefore, a signal reflected from a peripheral area of a reproduction beam spot other than a super resolution area can be excluded, thereby improving reproduction signal characteristics.

Method and apparatus for reproducing data of super resolution information storage medium

Information storage medium including data area having plurality of sync data and additional data area having first sync data and second sync data different from the first sync data, reproducing apparatus using the medium, and method of reproducing information from the medium

A method of generating and allocating codewords includes allocating one of two selectable codewords band bas codeword 'b' when a preceding codeword 'a' and a following codeword &#x201c;b&#x201d; form a code stream X, in which the codewords band bhave opposite INV values which are parameters indicating whether the number of '1s' contained in a codeword is an odd number or an even number. When the code stream of the preceding codeword &#x201c;a&#x201d; and the following codeword bis X, and when the code stream of the preceding codeword &#x201c;a&#x201d; and the following codeword bis X, the codewords are allocated such that the INV values of Xand Xare maintained to be opposite when the preceding codeword &#x201c;a&#x201d; or the following codeword b(b) (bor b) should be replaced by another codeword in compliance with a predetermined boundary condition given between codewords. The codewords are allocated so that a DC suppression capability of the code stream can be maintained.

Code generation and allocation apparatus

In a data demodulating method and apparatus, and a code arranging method, a multiplexer multiplexes an input data stream divided by a predetermined length into a plurality of types of pseudo random data streams using multiplexed information of predetermined bits by applying a predetermined multiplexing method to each of the pseudo random data streams. An encoder RLL-modulates the plurality of types of pseudo random data streams to create a modulated code stream including a minimum of DC components. The multiplexer generates the random data streams by inconsecutively scrambling the input data stream using the multiplexed information. The encoder weak DC-free RLL-modulates each of the multiplexed data streams without using a DC control sub code conversion table to which additional bits are added and provides a code stream including a minimum of DC components among multiplexed, RLL-modulated code streams.

A method of generating codewords that conform to a run length limited (RLL) constraint represented by (d, k, a, b), where d is a minimum run length of a codeword, k is a maximum run length of the codeword, a is a length of source data, and b is a length of the codeword. The method includes generating codewords conforming to the RLL(d, k) constraint, and removing codewords in which a relatively long T and a relatively short T are placed adjacent to each other from the generated codewords.

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Gyeonggi-do, South Korea

Kiu-hae Jung