• The Magazine of the IEIE
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• v.23 no.7
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• pp.37-43
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• 1996

DVD(Digital Versatile Disk)는 CD(Compact Disk)에 비해 약 9배의 저장용량(4.7GByte)을 갖는 디스크로 멀티미디어 시대를 위한 최적의 기록 매채로 그 중요성이 부각되고 있다. Player의 용도 또한 가전 영역인 audio/video system과 computer영역인 DVD-ROM모두에 적용될뿐만 아니라 기존의 모든 CD도 호환되도록 하고 있어 DVD판매 시장이 매우 크게 형성될 것으로 예측하고 있다. 여기에서는 DVD요소 기술과 동향 및 전망, 규격 내용, 그리고 DVD의 시장 동향에 관하여 기술하고자 한다.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.5 s.98
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• pp.124-131
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• 1999

DVD(Digital Versatile Disk) is the data storage media devised to make high storage density and high speed data input/output possible. For example, a whole length movie can be stored in a disk as large as a CD(Compact Disk). Therefore higher rotational speed and better accuracy in optical pick-up are required compared with the existing optical storage device. Without these operational functional requirements being satisfied DVD will lose its place as the high capacity storage device. This paper evaluated whether the currently developed DVD satisfies the requirements and provides improved methods with the Axiomatic Approach which is superb in evaluating and designing newly concepted designs.

• Digital Contents
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• no.11 s.114
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• pp.92-95
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• 2002

DVD(Digital Versatile Disk)에 관한 관심이 고조되고 있다. DVD가 현재 침체기에 있는 PC시장을 활성화시킬 수 있는 구세주로 등극할 것으로 예상되면서다. 최근 시장조사기관 IDC와 일본 파이오니어의 공동 보고서에 의하면 DVD와 관련된 홈 시어터, DVD 레코딩, 비디오 편집 분야가 PC 시장의 새로운 변수로 작용하고 있다. DVD롬 드라이브를 통한 DVD영화 시청은 물론, 직접 캠코더로 촬영한 동영상을 편집하고 DVD로 굽는 일련의 작업을 PC를 통해 수행하는 소비자들이 빠른 속도로 증가하고 있다는 얘기다. 이에 따라 관련업계의 움직임이 바빠지고 있다. 특히 DVD 관련 업체들의 DVD 표준 규격 확보를 위한 경쟁은 전쟁을 방불케하고 있다. 현재 마쓰시타, 소니, 도시바, HP, 삼성, LG 등 주요 광 드라이브 업체들이 DVD-R/RW, DVD-RAM, DVD+R/RW 등 각기 다른 차세대 기록형 DVD 규격을 놓고 경쟁하고 있다. 표준 규격을 거머쥐는 쪽이 향후에 전개될 차세대 DVD 시장을 주도할 것으로 예상되기 때문이다. 본 고에서는 현재 제기되고 있는 기록형 DVD 표준화 동향을 중심으로 차세대 DVD시장을 진단해본다.

• Proceedings of the KSME Conference
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• 2001.06c
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• pp.445-450
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• 2001

DVD(Digital Versatile Disk) is the data storage media devised to make high storage density and high data input/output possible. Therefore higher rotational speed and better accuracy in optical pick-up are required compared with the existing optical storage device. These operational functional requirements are concerned with abilities of optical storage device. Especially, High rotational speed is deeply concerned with the noise and vibration of optical storage device, is important problem in development of optical storage device so much. This paper propose a new concept ROM media of optical storage device named as Cylindrical ROM media, and evaluate this by means of Axiomatic approach and empirical data.

• Proceedings of the KSME Conference
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• 2001.06d
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• pp.585-588
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• 2001

Particle contamination on the data storage disks has been a serious problem for magnetic hard disk drive manufacturers. For high storage optical disks, such as DVD-ROM/RAM or NFR (near field recording) system, particle-induced damages can be also detected because only a few micrometer particles can prevent read/write signal from optical lens. The increasing areal density and smaller bit size accelerates particle induced damages on the optical disk. One of the methods to prevent particle contamination on the optical disk surface is to handle the disk enclosed in a cartridge like a modern DVD-RAM disk. However, even for a perfectly sealed disk drive, particles are found inside the drive. The other method is to improve disk surface characteristics. Particle contamination on the surface can be reduced by proper selection of disk coating materials. [n this paper, particle detachment ratios for CD (compact disk), DVD (digital versatile disk), HD (magnetic hard disk), HD with Jut lubricant, and aluminosilicate substrate HD were investigated. Surface roughness and surface energy of the test disks were compared with the particle detachment ratios. Proper substrate and lubricant characteristics to reduce particle contamination on the disk surface were found.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.9
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• pp.82-88
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• 1999

In order to execute the major role as the high density large capacity data storage device, which is one of the major characteristics of DVD(Digital Versatile Disk), there must be a method to effectively absorb the external impact or internal vibration. The DVD which has been developed until now tries to control two different types of vibrations, using only one absorber. But this goes against the independence Axiom of Axiomatic Approach which makes the design to be coupled. And in fat most of the malfunctions occurring during DVD data input/output is due to impact or vibration. Therefore in this paper, the vibration absorption system and operation reliability of DVD will be evaluated with the Axiomatic Approach and plans and feasibility to design an improved vibration absorption system will be provided also based on the Axiomatic Approach.

• The Journal of the Korea Contents Association
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• v.9 no.11
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• pp.120-129
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• 2009

It is now the digital and multi-media era. The DVD market is growing constantly. So is the capacity and quality of DVD players, In our research, we focused on the younger generation, who are now the greatest consumers. The results helped signify the most distinctive and popularized DVD player designs that satisfy young people's entertainment needs. Our new design is a large step ahead of older ones. Previous designs were uniform and standard. This new design has distinctive features and is uniquely user-friendly. It is focused primarily on easy usability. The interface is simple and straight forward. The user can use the system easily before consulting a manual. It is consistent in internal and external software and hardware, allowing the user to easily adapt to the product. DVD players have become a necessity in the current multi-media/digital era. So products need to be geared towards being available to not just those who are technologically savvy, but also those who rely on basic user-intuition. Our design takes into account these conditions, based on our statistical research, allowing us to expect our product to be a competitive force in the DVD market.

• The Journal of the Korea Contents Association
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• v.5 no.5
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• pp.145-151
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• 2005

We can define the procedure of Authoring that it makes area cord and the reproduction prevent menu programmed into MPEG II video stream , Audio which is AC-3 audio stream and subtitle under its own category. And it makes process an attribute, an order and an operation, gives the last disk image, Which is DVD(digital versatile disc). There are various process of Authoring tools in the market so that authoring tools can enable, encourage, and assist users ('authors') in the selection of tools that produce simple title, video production and editing suites. In this paper, we will compare and analyze authoring process in which image and sound are authorized into DVD with IEEE 1394port between Window system using generally with Desktop PC and the Macintosh that is based on OSX.

• Proceedings of the KIEE Conference
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• 1999.07b
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• pp.1009-1012
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• 1999

Recently, there is a strong need of DVD (Digital Versatile Disk) system of high density. high speed, and high accuracy System performances mostly depend on not only optical system, but also servo technology to drive it. Therefore, we investigate main technology concerned with optical pick-up unit based on 4.7GB DVD-RAM and analyzes technology of optical and servo systems that are required for high density high speed and high accuracy from the viewpoint of control. And then, we design a linear controller based on specification of 4.7GB DVD-RAM that is commercially available now. We analyze the dynamic characteristics of optical system that is coupled with control system and verify effect on performance indices of servo due to Parameter variation of pick-up by simulation. Finally, we will propose controller design specifications and provide direction of technical development for servo system and problems coupled with high capacity for 15GB level in the future.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.38 no.4
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• pp.33-38
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• 2001

Readout signal of high density DVD-RAM disk output was simulated to analyze the effect of crosserase and crosstalk to the readout signal which is one of the main difficulties to realize high density DVD-RAM system having single side recording density of 4.7 G13 and 15 G13 media. Laser beam intensity impinged on the disk was approximated as Gaussian and recorded marks were assumed elliptical and the readout signal was calculated as a two dimensional convolution of laser beam pattern and recored mark pattern. From the readout signal obtained by varying crosserase ratio, carrier levels with period of 3T to 11 T were calculated and compared. Jitter due to crosserase and crosstalk was calculated and compared using 1,000 random marks having 3T to 11T period. The results showed that the jitter due to crosserase turned out to be smaller than the jitter due to crosstalk.