KR100261804B1 - Method for variabling scan speed of optical disc playing apparatus - Google Patents

Method for variabling scan speed of optical disc playing apparatus Download PDF

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KR100261804B1
KR100261804B1 KR1019970019453A KR19970019453A KR100261804B1 KR 100261804 B1 KR100261804 B1 KR 100261804B1 KR 1019970019453 A KR1019970019453 A KR 1019970019453A KR 19970019453 A KR19970019453 A KR 19970019453A KR 100261804 B1 KR100261804 B1 KR 100261804B1
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scan
speed
picture
key
scan speed
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KR1019970019453A
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KR19980083949A (en
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강봉진
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구자홍
엘지전자주식회사
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/28—Speed controlling, regulating, or indicating
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • 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
    • G11B2220/2537—Optical discs
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: A method for varying a scan speed of an optical disk playing device is provided to vary the scan speed by using a preset speed decision function, according to the number of inputted times of a scan key when a screen is searched, or to directly vary the scan speed by using a numeric key, so as to perform a fast searching. CONSTITUTION: An optical disk playing device detects whether an optional key is inputted for scan speed varying, during a scan operation performance(S11). If so, the device calculates the number of jumped tracks, and decides a scan speed linearly or non-linearly according to the number of inputted times of a scan key(S12). If an optional numeric key is inputted, the device varies the scan speed at a speed corresponding to a numeric(S13). The device jumps as many as the number of the calculated tracks at the decided speed, and searches a header of an I-picture(S14). If the header is not searched, the device repeatedly searches the I-picture as maintaining a previous screen(S15). If the I-picture is searched, the device decodes the I-picture to display the I-picture(S16).

Description

광 디스크 재생장치의 스캔속도 가변방법{METHOD FOR VARIABLING SCAN SPEED OF OPTICAL DISC PLAYING APPARATUS}How to change the scanning speed of an optical disc playback device {METHOD FOR VARIABLING SCAN SPEED OF OPTICAL DISC PLAYING APPARATUS}

본 발명은 비디오 컴팩트 디스크(VCD) 또는 디지털 비디오 디스크(DVD)를 재생하는 장치에서 스캔 속도를 가변하고자 한 것으로, 특히 임의의 키 입력에 따라 선형 또는 비선형적으로 스캔속도를 가변하거나 다이렉트(direct)로 속도를 가변할 수 있도록 하여 사용자의 탐색 편의성을 향상시키도록 한 광 디스크 재생장치의 스캔속도 가변방법에 관한 것이다.The present invention seeks to vary the scan speed in a device for playing a video compact disc (VCD) or digital video disc (DVD). In particular, the scan speed can be varied linearly or nonlinearly or directly according to any key input. The present invention relates to a method of varying the scan speed of an optical disc reproducing apparatus to improve the user's search convenience by varying the speed.

종래 광 디스크 재생장치의 스캔방법은, 도 1에 도시된 바와같이, 스캔 동작 수행중에 스캔 키 입력이 있으면 점프할 트랙수(N(t))를 산출하는 제1단계(S1)와; 상기 제1단계(S1)에서 산출된 트랙 수 만큼 점프를 행하는 제2단계(S2)와; 상기 제2단계(S2)에서 점프 완료 후 I 픽쳐의 헤더를 찾는 제3단계(S3)와; 상기 제3단계(S3)에서 I 픽쳐의 헤더를 발견하지 못했을 때 이전 화면을 유지하면서 I 픽쳐를 찾을 때까지 반복하는 제4단계(S4)와; 상기 제3단계(S3)에서 I 픽쳐를 찾으면 디코딩하여 디스플레이하는 제5단계(S5)로 이루어진다.The scanning method of a conventional optical disc reproducing apparatus includes a first step (S1) of calculating the number of tracks (N (t)) to be jumped when a scan key input is performed while performing a scan operation as shown in FIG. A second step S2 for jumping by the number of tracks calculated in the first step S1; A third step (S3) of finding a header of the I picture after completion of the jump in the second step (S2); A fourth step (S4) of repeating until the I picture is found while maintaining the previous screen when the header of the I picture is not found in the third step (S3); When the I picture is found in the third step S3, the fifth picture is decoded and displayed.

이상에서와 같이 각 단계로 이루어진 종래 기술에 대하여 상세히 살펴보면 다음과 같다.Looking at in detail with respect to the prior art made of each step as described above are as follows.

비디오 컴팩트 디스크(VCD) 또는 디지털 비디오 디스크(DVD) 재생 도중에 스캔 키가 입력되면, 재생장치는 우선 점프해야 할 트랙의 갯수(N(t))를 산출한다(S1).If a scan key is input during playback of a video compact disc (VCD) or digital video disc (DVD), the playback apparatus first calculates the number N (t) of tracks to be jumped (S1).

왜냐하면, 단위 트랙당 포함된 데이터 량은 디스크 내주에서 디스크 외주로 갈 수록 많기 때문에 일정한 스캔 간격을 유지하기 위해서는 외주로 갈 수록 점프할 트랙 수의 갯수가 내주에 비해 줄어들게 된다.Because the amount of data included per unit track increases from the inner circumference to the outer circumference of the disc, the number of tracks to jump to the outer circumference decreases compared to the inner circumference to maintain a constant scan interval.

따라서 시간의 함수 N(t)로 표현할 수 있다.Therefore, it can be expressed as a function of time N (t).

이렇게 상기 S1단계에서, 점프할 트랙의 갯수(N(t))가 결정되면, 컴팩트 디스크 플레이어(CDP)는 그 만큼 트랙 점프를 하여 픽업의 위치를 이동시킨다(S2).When the number N (t) of tracks to be jumped is determined in this step S1, the compact disc player CDP jumps the tracks by that amount and moves the pickup position (S2).

이후에 엠펙부와 통신을 행하여 I 픽쳐의 헤더를 찾았는지를 판별하게 된다(S3).Thereafter, communication with the MPEG unit is made to determine whether the header of the I picture is found (S3).

판별 결과, I 픽쳐의 헤더를 찾지 못한 경우에는 이전 화면을 홀드하면서 찾을 때 까지 컴팩트 디스크 플레이어(CDP)를 진행시키고(S4), I 픽쳐의 헤더를 찾게 되는 경우에는 I 픽쳐를 디코딩하여 화면에 디스플레이 하도록 하는 동작(S5)을 반복한다.As a result of the determination, if the header of the I picture is not found, the compact disc player (CDP) is advanced until the previous screen is held while looking up (S4). If the header of the I picture is found, the I picture is decoded and displayed on the screen. The operation S5 is repeated.

상기에서와 같은 동작에 의해 사용자가 원하는 곳을 찾을 수 있도록 한다.The above operation allows the user to find a desired place.

그러나, 상기에서와 같은 종래기술에서 스캔 속도가 항상 일정하기 때문에 사용자가 스캔을 이용한 탐색시 탐색 시간이 많이 걸리기 때문에 사용자에게 지루함이나 불편함을 주게 되는 문제점이 있다.However, since the scan speed is always constant in the prior art as described above, since the user takes a lot of searching time when searching using the scan, there is a problem that the user is bored or uncomfortable.

따라서 상기에서와 같은 문제점을 해결하기 위한 본 발명의 목적은 스캔 속도를 사용자가 단계적으로 변경할 수 있도록 하여 탐색 편의성을 향상시키도록 한 광 디스크 재생장치의 스캔속도 가변방법을 제공함에 있다.Accordingly, an object of the present invention to solve the above problems is to provide a method of varying the scan speed of an optical disk reproducing apparatus to improve the search convenience by allowing the user to change the scan speed step by step.

본 발명의 다른 목적은 스캔 속도를 사용자가 임의로 가변할 수 있도록 한 광 디스크 재생장치의 스캔속도 가변방법을 제공함에 있다.Another object of the present invention is to provide a method of varying the scan speed of an optical disk reproducing apparatus, which allows the user to arbitrarily vary the scan speed.

도 1은 종래 광 디스크 재생장치의 스캔방법에 대한 동작 과정도.1 is a flowchart illustrating a method of scanning a conventional optical disc player.

도 2는 본 발명 광 디스크 재생장치의 스캔속도 가변방법에 대한 동작 과정도.2 is a flowchart illustrating a method of varying a scan speed of an optical disc reproducing apparatus of the present invention.

도 3은 도 2에서, 스캔 속도를 결정하는 속도결정함수(f(i))를 보여주는 특성도.FIG. 3 is a characteristic diagram showing a speed determining function f (i) for determining the scanning speed in FIG.

상기 목적을 달성하기 위한 본 발명 광 디스크 재생장치의 스캔속도 가변방법은, 도 2에 도시한 바와같이, 스캔 동작 수행중 스캔속도 가변을 위한 임의의 키 입력여부를 검출하는 제1단계(S11)와; 상기 제1단계(S11)에서 검출결과 스캔 키 입력이 있으면 점프할 트랙 수를 산출한 후 스캔 키의 입력횟수에 따라 선형 또는 비선형적으로 스캔속도를 결정하는 제2단계(S12)와; 상기 제1단계(S11)에서 검출결과 임의의 숫자 키 입력시 그 숫자에 해당하는 속도로 스캔속도를 가변하는 제3단계(S13)와; 상기 제2단계(S12)와 제3단계(S13)에서 결정된 스캔속도로 상기 제2단계에서 산출한 트랙 수 만큼 점프한 후 I픽쳐의 헤더를 찾는 제4단계(S14)와; 상기 제4단계(S14)에서 I픽쳐의 헤더를 발견하지 못했을 때 이전 화면을 유지하면서 I 픽쳐를 반복적으로 찾도록 하는 제5단계(S15)와; 상기 제4단계(S14)에서 I 픽쳐를 찾으면 디코딩하여 디스플레이하는 제6단계(S16)로 이루어진다.In the method of varying the scan speed of the optical disc reproducing apparatus of the present invention for achieving the above object, as shown in FIG. 2, a first step (S11) of detecting whether an arbitrary key is input for changing the scan speed while performing a scan operation is performed. Wow; A second step (S12) of calculating a number of tracks to jump if a scan key input is detected in the first step (S11) and then determining the scan speed linearly or nonlinearly according to the number of inputs of the scan key; A third step (S13) of varying a scan speed at a speed corresponding to the number when the detection result is input in the first step (S11); A fourth step (S14) of finding the header of the I picture after jumping by the number of tracks calculated in the second step at the scan speed determined in the second step (S12) and the third step (S13); A fifth step (S15) of repeatedly searching for an I picture while maintaining a previous screen when the header of the I picture is not found in the fourth step (S14); When the I picture is found in the fourth step S14, the sixth step S16 of decoding and displaying the I picture is performed.

이와같이 각 단계로 이루어진 본 발명의 동작 및 작용 효과에 대하여 상세히 설명하면 다음과 같다.When described in detail with respect to the operation and effect of the present invention made of each step as follows.

스캔 동작 수행 도중에 임의의 키 즉, 스캔 키 (scan key) 또는 다이렉트(direct)로 스캔속도 가변을 위한 숫자 키의 입력이 있는지를 검출한다(S11).During execution of the scan operation, it is detected whether there is an input of a numeric key for varying the scan speed by an arbitrary key, that is, a scan key or direct (S11).

검출 결과, 스캔 키의 입력이 있으면 점프할 트랙 수(N(t))를 산출하는데, 상기 트랙 수는 단위 트랙당 포함된 데이터 량이 디스크 내주에서 디스크 외주로 갈수록 많으므로 현재 픽업이 위치한 시간 정보에 따라 가변된다.As a result of the detection, when the scan key is input, the number of tracks to be jumped (N (t)) is calculated. The number of tracks is determined by the time information at which the current pickup is located since the amount of data included per unit track increases from the inner disk to the outer disk. Is variable accordingly.

즉, 최외주로 갈수록 점프할 트랙 수가 줄어들게 되므로, 시간의 함수 N(t)로 표현되는 점프 트랙 수를 산출한다.That is, since the number of tracks to jump is reduced toward the outermost circumference, the number of jump tracks expressed as a function of time N (t) is calculated.

이렇게 스캔 키 입력이 있은 후, 재차 스캔 키 입력이 있으면 그 스캔 키 입력 횟수에 따라 속도결정함수(f(i))에 의해 스캔속도를 결정한다.After the scan key input, the scan speed is determined by the speed determination function f (i) according to the number of scan key inputs.

즉, 스캔 키 입력이 있은 후 1회의 스캔 키 입력이 재차 있으면 속도결정함수f(i)=i로 스캔속도를 결정하고, 2회의 스캔 키 입력이 재차 있으면 속도결정함수

Figure pat00001
로 스캔속도를 결정하고, 3회의 스캔 키 입력이 재차 있으면 속도결정함수
Figure pat00002
로 스캔속도를 결정한다.(S12)In other words, if there is one scan key input again after the scan key input, the speed determination function f (i) = i is used to determine the scan speed.
Figure pat00001
To determine the scan speed, and if there are 3 scan key inputs again, the speed determination function
Figure pat00002
Determine the scan speed with (S12).

따라서 스캔 키 입력 후 2번의 스캔 키 입력이 재차 있으면 스캔속도는

Figure pat00003
로 하여 앞에서 산출된 트랙 점프 수(N(t)) 만큼 점프를 행한다.Therefore, if the scan key is pressed twice after the scan key is input, the scan speed will be
Figure pat00003
The jump is performed by the track jump number N (t) calculated before.

상기에서 속도결정함수(f(i))는 도 3에 도시한 바와같다.The rate determination function f (i) is as shown in FIG.

그리고, 스캔 키 입력이 있은 후 숫자 키가 입력되면, 이 입력된 숫자를 속도로 직접(direct) 가변하여 스캔한다(S13).If a numeric key is input after the scan key is input, the input number is directly changed at a speed and scanned (S13).

예를들면, 스캔 동작 수행중에 숫자 "8"번의 키가 눌려지면, 스캔속도가 8배로 가변되어 스캔한다.For example, if the number "8" is pressed while performing a scan operation, the scan speed is varied by eight times and scanned.

이렇게 가변된 속도로 앞에서 산출한 트랙만큼 점프한다.At this variable speed, the player jumps by the track calculated earlier.

결국, 숫자키를 한번만 누르면 원하는 스캔속도로 가변되므로, 더 간편하고 빠르게 검색할 수 있다.After all, press the numeric key once to change to the desired scan speed, you can search more easily and quickly.

상기에서 트랙 점프를 완료한 후 I 픽쳐의 헤더를 찾는다(S14).After completing the track jump, the header of the I picture is found (S14).

상기 S14단계에서 I 픽쳐의 헤더를 찾지 못하면 이전 화면을 유지하면서 I 픽쳐를 찾을 때 까지 컴팩트 디스크 플레이어를 진행시키고(S15), I 픽쳐의 헤더를 찾으면 I 픽쳐를 디코딩을 행하여 압축된 데이터를 원래의 데이터로 신장시킨 후 화면에 디스플레이하도록 한다(S16).If the header of the I picture is not found in step S14, the compact disc player is advanced until the I picture is found while maintaining the previous screen (S15). If the header of the I picture is found, the I data is decoded to decode the compressed data. After stretching the data to display on the screen (S16).

이상에서와 같이 스캔 동작 수행중에 재차 스캔 키 또는 숫자 키가 입력되면, 스캔 키의 입력 횟수에 따른 속도결정함수에 의해 스캔 속도를 가변하거나 숫자 키 입력에 따라 다이렉트로 속도를 가변한다.As described above, when the scan key or the numeric key is input again while performing the scan operation, the scan speed is changed by the speed determining function according to the number of input of the scan key or the speed is directly changed according to the numeric key input.

이렇게 가변된 스캔속도를 재생장치의 화면을 고속으로 탐색할 때 유용하도록 한다.This variable scan speed is useful when searching the screen of a playback device at high speed.

상술한 바와 같이, 본 발명은 재생장치의 화면을 탐색할 때 스캔 키의 입력횟수에 따라 기설정된 속도결정함수를 이용하여 스캔속도를 가변하거나 숫자 키를 이용하여 다이렉트로 스캔속도를 가변하도록 함으로써 고속으로 탐색이 가능하도록 하고, 사용자에게 탐색 편의성을 제공하도록 한 효과가 있다.As described above, in the present invention, the scan speed is changed by using a predetermined speed determining function or the direct scan speed is changed by using a number key when the screen of the playback apparatus is searched. In this way, it is possible to search and to provide the user with the convenience of searching.

Claims (2)

스캔 동작 수행중 스캔속도 가변을 위한 임의의 키 입력여부를 검출하는 제1단계와; 상기 제1단계에서 스캔 키 입력이 있으면 점프할 트랙 수를 산출한 후 스캔 키의 입력횟수에 따라 선형 또는 비선형적으로 스캔속도를 가변하는 제2단계와; 상기 제1단계에서 임의의 숫자 키 입력시 그 숫자에 해당하는 속도로 스캔속도를 가변하는 제3단계와; 상기 제2단계와 제3단계에서 가변된 스캔속도로 상기 제2단계에서 산출된 트랙 수 만큼 점프한 후 I픽쳐의 헤더를 찾는 제4단계와; 상기 제4단계에서 I픽쳐의 헤더를 발견하지 못했을 때 이전 화면을 유지하면서 I 픽쳐를 반복적으로 찾도록 하는 제5단계와; 상기 제4단계에서 I 픽쳐를 찾으면 디코딩하여 디스플레이하는 제6단계로 이루어진 것을 특징으로 하는 광 디스크 재생장치의 스캔속도 가변방법.Detecting a key input for changing a scan speed during a scan operation; Calculating a number of tracks to jump if there is a scan key input in the first step and then varying the scan speed linearly or nonlinearly according to the number of inputs of the scan key; A third step of varying a scan speed at a speed corresponding to the number when an arbitrary number key is input in the first step; A fourth step of finding the header of the I picture after jumping by the number of tracks calculated in the second step at the scan speeds varied in the second and third steps; A fifth step of repeatedly searching for an I picture while maintaining a previous screen when the header of the I picture is not found in the fourth step; And a sixth step of decoding and displaying the I picture in the fourth step. 제1항에 있어서, 임의의 키는 입력횟수에 따라 선형 또는 비선형적으로 속도를 가변하기 위한 스캔 키인 것을 특징으로 하는 광 디스크 재생장치의 스캔속도 가변방법.2. The method of claim 1, wherein the arbitrary key is a scan key for varying the speed linearly or nonlinearly according to the number of times of input.
KR1019970019453A 1997-05-20 1997-05-20 Method for variabling scan speed of optical disc playing apparatus KR100261804B1 (en)

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KR940016133A (en) * 1992-12-24 1994-07-22 윤종용 One-touch continuous search method of optical disk system
KR970007868A (en) * 1995-07-21 1997-02-21 김광호 Optical disc speed change device

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Publication number Priority date Publication date Assignee Title
KR940016133A (en) * 1992-12-24 1994-07-22 윤종용 One-touch continuous search method of optical disk system
KR970007868A (en) * 1995-07-21 1997-02-21 김광호 Optical disc speed change device

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