Samsung Electronics Co., Ltd.

Samung Electronics Co., Ltd

Jae-seong Shim

Kyung-geun Lee

Hyun-Soo Park

In-sik Park

Kiu-hae Jung

Byoung-ho Choi

Du-seop Yoon

Jin-Han Kim

Ki-hyun Kim

Byung-in Ma

Jung-wan Ko

Jung-Hyun Lee

Seong-sin Joo

Eun-jin Ryu

Eing-seob Cho

Tatsuhiro Otsuka

Iqbal Mahboob

Ki-Hyun Kim

Yong-Jin Ahn

Sung-hyu Han

Byung-jun Kim

Jae-wook Lee

Myoung-june Kim

Chan-Dong Cho

Jong-Sik Jeong

Yong-kwang Won

Jung-Wan Ko

Jae-Wook Lee

Yong-Kwang Won

Sung-hee Hwang

Jae-Jin Lee

Chang-min Park

Jin-han Kim

Joong-Eon Seo

Ju-han Bae

You-pyo Hong

Igbal Mahboob

Yoon-woo Lee

In-oh Hwang

Joong-eon Seo

Myong-do Ro

Jeong-joo Jeong

Hee-Wan Lee

Du-Seop Yoon

Jae-hoon Seo

Jong-Sang Yim

KiuShae Jung

Klu-hae Jung

Young-jin Ahn

Il-Yeong Roh

Il-Kwan Kim

An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

Optical recording medium with different wobble characteristics between the user data area and the lead-out area

A method of determining characteristics of a signal and an apparatus using the method. The apparatus for determining characteristics of a signal includes: a level detector receiving sample values of a radio frequency (RF) signal and binary data obtained by binarizing the RF signal, generating selection signals based on the binary data, classifying each of the sample values of the RF signal into one of a plurality of levels using the selection signals, and outputting average values of sample values of each level; and a signal characteristics determiner determining a characteristics value that indicates the characteristics of the RF signal using the average values of the sample values belonging to each level.

Method for determining characteristics of signal and apparatus using the same

A frequency detection apparatus and method for generating a stable clock signal synchronized with an input signal and a signal boost filter used in the frequency detection apparatus and method, the frequency detection apparatus includes a signal boost filter filtering out the high frequency component of an input signal and boosting the high frequency component, and a frequency detector receiving an input signal with the boosted high frequency component and a clock signal, detecting a frequency difference between the input signal and the clock signal, and producing a control voltage corresponding to the frequency difference. Accordingly, even when there is a big difference between the frequency of the input signal and an oscillating frequency, a frequency error can be stably detected. Thus, a stable clock signal can be obtained.

Frequency detection apparatus and method for generation of a clock signal for optical disc

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

An apparatus and method for measuring the quality of a signal on an optical disc based on level information of a viterbi decoder are provided. The signal quality measuring apparatus includes: a binary unit that generates binary signals from input RF signals; a channel identifier that receives the input RF signals and the binary signals output from the binary unit and outputs reference level values corresponding to the binary signals; and an information calculator that receives the reference level values and detects a signal quality value.

Apparatus and method for measuring signal quality

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

An optical recording medium has a user data area and a lead-out area each having grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of the grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of the wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproducing, from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have the same condition, thereby preventing deterioration in reproducing and/or recording due to a difference in light power transmittance of another recording layer.

Optical recording medium

An address information modulation method includes using a first characteristic of a first modulation method and a second characteristic of a second modulation method to modulate address information and/or additional information. Accordingly, a data amount of information, to access a disc, in a predetermined space of the disc is increased, and the modulated information is formed in a form of a wobble signal in a track. Here, the first characteristic of the first modulation method can be physical location information of an MSK-modulated signal, and the second characteristic of the second modulation method can be sign information of a second harmonic wave obtained by an HMW modulation, which synthesizes a cosine function of a basic frequency of a wobble signal with a sine function having a frequency that is a multiple of the basic frequency of the wobble signal. Therefore, where the address information is modulated, a plurality of information bits are loaded on a predetermined number of wobble or carrier signals to increase the amount of the information in the predetermined space, such that a physical length of the information needed in accessing the disc and reading the additional information thereof is shortened. Also, where a defect occurs, the resulting loss can be reduced such that addressing specifications for a small-sized high density disc can be satisfied.

Optical disc having small access units and address information modulation method therefor

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

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Seoul, South Korea

Jae-seong Shim