KR100516608B1 - Method for recording control pixel in holographic digital data storage system - Google Patents

Method for recording control pixel in holographic digital data storage system Download PDF

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Publication number
KR100516608B1
KR100516608B1 KR10-2003-0043341A KR20030043341A KR100516608B1 KR 100516608 B1 KR100516608 B1 KR 100516608B1 KR 20030043341 A KR20030043341 A KR 20030043341A KR 100516608 B1 KR100516608 B1 KR 100516608B1
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South Korea
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image
control pixel
control
tracking servo
digital data
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KR10-2003-0043341A
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Korean (ko)
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KR20050003194A (en
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정규일
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주식회사 대우일렉트로닉스
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • G11B27/26—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording by photoelectric detection, e.g. of sprocket holes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
    • G11B5/59677—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks with optical servo tracking
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2504—Holographic discs; Holographic digital data storage [HDDS]

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  • Holo Graphy (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 HDDS의 제어 픽셀 기록방법에 관한 것으로, 저장 매체 내에 홀로그램 디지털 데이터를 저장할 경우, 영상(image)을 기준으로 일측과 다른 측에 하나씩 제어 픽셀을 각각 배열시키는 단계와, 영상을 기준으로 일측 제어 픽셀은 CCD로 영상을 잡을 타이밍을 알려주며, 다른 측 제어 픽셀은 트래킹 서보를 수행하도록 하는 단계와, 트래킹 서보를 수행하기 위한 제어 픽셀이 영상을 기준으로 연속적으로 배열되도록 하는 단계를 포함한다. 따라서, 트랙킹 서보(tracking servo)를 정확하게 수행할 수 있는 효과가 있다.The present invention relates to a control pixel recording method of the HDDS, in the case of storing holographic digital data in a storage medium, arranging one control pixel on one side and the other on the basis of the image, and one side on the basis of the image. The control pixel informs the timing of capturing the image with the CCD, and the other side control pixel includes performing a tracking servo, and causing the control pixel for performing the tracking servo to be continuously arranged based on the image. Therefore, there is an effect that can accurately perform a tracking servo.

Description

홀로그래픽 디지털 데이터 저장 시스템의 제어 픽셀 기록방법{METHOD FOR RECORDING CONTROL PIXEL IN HOLOGRAPHIC DIGITAL DATA STORAGE SYSTEM}Control pixel recording method of holographic digital data storage system {METHOD FOR RECORDING CONTROL PIXEL IN HOLOGRAPHIC DIGITAL DATA STORAGE SYSTEM}

본 발명은 홀로그래픽 디지털 데이터 저장 시스템(Holographic Digital Data Storage system, HDDS)의 제어 픽셀 기록방법에 관한 것으로, 특히 하나의 영상(image)에 제어 픽셀(control pixel)을 연속적으로 배열하여 트랙킹 서보(tracking servo)를 정확하게 수행할 수 있도록 하는 방법에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control pixel recording method of a holographic digital data storage system (HDDS), and more particularly to tracking servos by continuously arranging control pixels in one image. It is about how to perform the servo (correctly).

통상적으로, HDDS는 대상 물체로부터 전달된 물체 광과 기준광을 간섭시킨 후, 이러한 간섭에 의해 발생하는 간섭 무늬를 간섭 무늬의 강도(amplitude)와 위상(phase)에 따라 다르게 반응하는 크리스탈(crystal)과 같은 저장 매체에 기록한다.In general, the HDDS may interfere with the object light transmitted from the object and the reference light, and then the crystal may react with the interference fringe generated by the interference differently according to the amplitude and phase of the interference fringe. Write to the same storage medium.

즉, HDDS는 기준광의 입사 각도를 변화시켜 물체광의 강도는 물론 위상(phase)도 기록하여 물체의 3차원 상을 구현할 수 있으며, 2진 데이터의 페이지(page) 단위로 구성되는 수백에서 수천 개의 홀로그램 디지털 데이터를 저장 매체 내의 동일한 장소에 저장할 수 있다.In other words, the HDDS can change the angle of incidence of the reference light to record not only the intensity but also the phase of the object light to realize a three-dimensional image of the object. The digital data can be stored in the same place in the storage medium.

이러한 저장 매체 내에는 도 1에 도시된 바와 같이, 영상(image)을 기준으로 좌/우로 하나씩 제어 픽셀이 배열되어 있다.In this storage medium, as illustrated in FIG. 1, control pixels are arranged one by one left / right based on an image.

다시 말해서, 영상을 기준으로 일측 제어 픽셀은 CCD로 영상을 잡을 타이밍을 알려주는 픽셀이며, 다른 측 제어 픽셀은 트래킹 서보를 수행하기 위한 픽셀이다.In other words, one side control pixel is a pixel indicating the timing of capturing the image with the CCD, and the other side control pixel is a pixel for performing tracking servo.

이중, 트래킹 서보를 수행하기 위한 픽셀이 영상을 기준으로 한 개씩 배열되어 있어, 트래킹 서보를 불규칙하게 수행하여 홀로그램 디지털 데이터를 부정확하게 기록하게 되는 문제점을 갖고 있다. Among them, since pixels for performing the tracking servo are arranged one by one based on the image, the tracking servo may be irregularly recorded to incorrectly record the hologram digital data.

따라서, 본 발명은 상술한 문제점을 해결하기 위해 안출한 것으로서, 그 목적은 하나의 영상에 트래킹 서보를 수행하기 위한 제어 픽셀을 연속적으로 배열하여 트랙킹 서보(tracking servo)를 정확하게 수행할 수 있도록 하는 HDDS의 제어 픽셀 기록방법을 제공함에 있다. Accordingly, an object of the present invention is to solve the above-described problem, and an object thereof is to provide a HDDS for accurately performing a tracking servo by continuously arranging control pixels for performing a tracking servo in one image. It is to provide a control pixel recording method of.

상술한 목적을 달성하기 위한 본 발명에서 HDDS의 제어 픽셀 기록방법은 저장 매체 내에 홀로그램 디지털 데이터를 저장할 경우, 영상(image)을 기준으로 일측과 다른 측에 하나씩 제어 픽셀을 각각 배열시키는 단계와, 영상을 기준으로 일측 제어 픽셀은 CCD로 영상을 잡을 타이밍을 알려주며, 다른 측 제어 픽셀은 트래킹 서보를 수행하도록 하는 단계와, 트래킹 서보를 수행하기 위한 제어 픽셀이 영상을 기준으로 연속적으로 배열되도록 하는 단계를 포함하는 것을 특징으로 한다. In the present invention, in order to achieve the above object, in the case of storing holographic digital data in a storage medium, the control pixel recording method of the HDDS includes arranging control pixels on one side and the other side based on an image, respectively, On the basis of this, one side control pixel informs the timing of capturing the image by the CCD, and the other side control pixel performs tracking servo and the control pixel for performing the tracking servo is arranged continuously based on the image. It is characterized by including.

이하, 첨부된 도면을 참조하면서 본 발명에 따른 일 실시예를 상세하게 설명하기로 한다.Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

도 2를 참조하면, 본 발명에 따른 HDDS의 제어 픽셀 기록방법을 수행하기 위한 도면이다. 2 is a diagram for performing a control pixel recording method of the HDDS according to the present invention.

즉, 크리스탈(crystal)과 같은 저장 매체(SS1) 내에 수백에서 수천 개의 홀로그램 디지털 데이터를 저장할 경우, 도 2에 도시된 바와 같이, 영상(image)(S1)을 기준으로 일측과 다른 측에 하나씩 제어 픽셀(S3, S2)을 각각 배열시킨다. That is, when storing hundreds to thousands of holographic digital data in a storage medium SS1 such as a crystal, as shown in FIG. 2, one control on one side and the other side based on the image S1 is shown. The pixels S3 and S2 are arranged respectively.

다시 말해서, 영상(S1)을 기준으로 일측 제어 픽셀(S3)은 CCD로 영상을 잡을 타이밍을 알려주는 픽셀(S3)이며, 다른 측 제어 픽셀(S2)은 트래킹 서보를 수행하기 위한 픽셀(S2)이다.In other words, the one side control pixel S3 is a pixel S3 indicating the timing of capturing the image by the CCD, and the other side control pixel S2 is the pixel S2 for performing tracking servo. to be.

이중, 트래킹 서보를 수행하기 위한 픽셀(S2)이 영상(S1)을 기준으로 연속적으로 배열되도록 함에 따라 트래킹 서보를 규칙적으로 수행하여 홀로그램 디지털 데이터를 정확하게 기록할 수 있다. Since the pixels S2 for performing the tracking servo are continuously arranged based on the image S1, the tracking servo may be regularly performed to accurately record the hologram digital data.

또한, 도 3a 내지 도 3b를 참조하면, 본 발명의 다른 실시 예에 따른 영상(image)(S1)을 기준으로 좌/우로 제어 픽셀이 각각 배열되어 있다.In addition, referring to FIGS. 3A to 3B, control pixels are arranged left and right based on an image S1 according to another exemplary embodiment of the present invention.

먼저 도 3a는 영상(image)(S1)을 기준으로 일측에 하나, 다른 측에 세 개의 제어 픽셀(S3, S4)이 각각 배열되어 있다.First, in FIG. 3A, three control pixels S3 and S4 are arranged on one side and the other side based on the image S1.

다시 말해서, 영상(S1)을 기준으로 일측 제어 픽셀(S3)은 CCD로 영상을 잡을 타이밍을 알려주는 픽셀(S3)이며, 다른 측 세 개의 제어 픽셀(S4)은 트래킹 서보를 수행하기 위한 픽셀(S4)이다.In other words, the control pixel S3 on one side of the image S1 is a pixel S3 that informs the timing of capturing the image by the CCD, and the three control pixels S4 on the other side are pixels for performing tracking servo. S4).

다음으로, 도 3b는 영상(image)(S1)을 기준으로 일측에 하나, 다른 측에 모든 영상(S1)을 기준으로 연속적인 제어 픽셀(S3, S5)로 배열되어 있다.Next, FIG. 3B is arranged with consecutive control pixels S3 and S5 on one side of the image S1 and on all images S1 on the other side.

다시 말해서, 영상(S1)을 기준으로 일측 제어 픽셀(S3)은 CCD로 영상을 잡을 타이밍을 알려주는 픽셀(S3)이며, 다른 측 모든 영상(S1)을 기준으로 연속적인 제어 픽셀(S5)은 트래킹 서보를 수행하기 위한 픽셀(S5)이다.In other words, the one-side control pixel S3 based on the image S1 is a pixel S3 indicating the timing at which the image is captured by the CCD, and the continuous control pixel S5 based on all the other images S1 on the other side is Pixel S5 for performing tracking servo.

이와 같이, 트래킹 서보를 수행하기 위한 픽셀(S4, S5)이 영상(S1)을 기준으로 여러 개 또는 연속적으로 배열시켜 트래킹 서보를 규칙적으로 수행할 수 있는 것이다. As described above, the tracking servo may be regularly performed by arranging the pixels S4 and S5 for performing the tracking servo several or consecutively based on the image S1.

그러므로, 본 발명은 하나의 영상에 트래킹 서보를 수행하기 위한 제어 픽셀을 여러 개 또는 연속적으로 배열함으로써, 트랙킹 서보(tracking servo)를 정확하게 수행할 수 있는 효과가 있다.Therefore, the present invention has an effect of accurately performing a tracking servo by arranging several or successively control pixels for performing the tracking servo on one image.

도 1은 기존 홀로그래픽 디지털 데이터 저장 시스템의 제어 픽셀 기록방법에 대하여 도시한 도면이며, 1 is a view illustrating a control pixel recording method of a conventional holographic digital data storage system.

도 2는 본 발명에 따른 홀로그래픽 디지털 데이터 저장 시스템의 제어 픽셀 기록방법에 대하여 도시한 도면이며,2 is a view showing a control pixel recording method of a holographic digital data storage system according to the present invention;

도 3은 본 발명의 다른 실시 예에 따른 영상(image)을 기준으로 좌/우로 제어 픽셀을 배열시킨 도면이다. 3 is a diagram illustrating control pixels arranged left and right based on an image according to another embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

SS1 : 저장 매체 S1 : 영상SS1: storage medium S1: video

S2, S4, S5 : 트래킹 서보를 수행하기 위한 픽셀S2, S4, S5: Pixels for Performing Tracking Servo

S3 : 타이밍을 알려주는 제어 픽셀S3: control pixel indicating timing

Claims (3)

홀로그래픽 디지털 데이터 저장 시스템(Holographic Digital Data Storage system, HDDS)의 제어 픽셀 기록방법에 있어서, In the control pixel recording method of the holographic digital data storage system (HDDS), 저장 매체 내에 홀로그램 디지털 데이터를 저장할 경우, 영상(image)을 기준으로 일측과 다른 측에 하나씩 제어 픽셀을 각각 배열시키는 단계와, When storing holographic digital data in a storage medium, arranging control pixels, one on one side and the other on the basis of an image, respectively; 상기 영상을 기준으로 일측 제어 픽셀은 CCD로 영상을 잡을 타이밍을 알려주며, 다른 측 제어 픽셀은 트래킹 서보를 수행하도록 하는 단계와, The control pixel of one side informs the timing of capturing the image by the CCD, and the control of the other side performs tracking servo based on the image; 상기 트래킹 서보를 수행하기 위한 제어 픽셀이 상기 영상을 기준으로 연속적으로 배열되도록 하는 단계Allowing control pixels for performing the tracking servo to be continuously arranged with respect to the image 를 포함하는 것을 특징으로 하는 HDDS의 제어 픽셀 기록방법.Control pixel recording method of the HDDS comprising a. 제 1 항에 있어서, The method of claim 1, 상기 트래킹 서보를 수행하기 위한 제어 픽셀은, 상기 영상을 기준으로 여러 개의 제어 픽셀로 각각 배열하는 것을 특징으로 하는 HDDS의 제어 픽셀 기록방법.The control pixel recording method of the HDDS, wherein the control pixels for performing the tracking servo are arranged in a plurality of control pixels based on the image. 제 1 항에 있어서, The method of claim 1, 상기 트래킹 서보를 수행하기 위한 제어 픽셀은, 모든 영상을 기준으로 연속적인 제어 픽셀로 배열하는 것을 특징으로 하는 HDDS의 제어 픽셀 기록방법.The control pixel for performing the tracking servo, the control pixel recording method of the HDDS, characterized in that arranged in a continuous control pixel on the basis of all images.
KR10-2003-0043341A 2003-06-30 2003-06-30 Method for recording control pixel in holographic digital data storage system KR100516608B1 (en)

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