KR20000020710A - Method for reproducing data of dvd - Google Patents

Method for reproducing data of dvd Download PDF

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Publication number
KR20000020710A
KR20000020710A KR1019980039432A KR19980039432A KR20000020710A KR 20000020710 A KR20000020710 A KR 20000020710A KR 1019980039432 A KR1019980039432 A KR 1019980039432A KR 19980039432 A KR19980039432 A KR 19980039432A KR 20000020710 A KR20000020710 A KR 20000020710A
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South Korea
Prior art keywords
dvd
data
disk key
disk
verified
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KR1019980039432A
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Korean (ko)
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KR100381649B1 (en
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이상암
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윤종용
삼성전자 주식회사
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Priority to KR10-1998-0039432A priority Critical patent/KR100381649B1/en
Publication of KR20000020710A publication Critical patent/KR20000020710A/en
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • 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
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/06—Control of operating function, e.g. switching from recording to reproducing by counting or timing of machine operations
    • 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
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/10—Control of operating function, e.g. switching from recording to reproducing by sensing presence or absence of record in accessible stored position or on turntable
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • 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

Abstract

PURPOSE: A method for reproducing data of DVD is provided to reproduce and copy data recorded in a DVD when a disk key is correct and only a bit stream is normally recorded. CONSTITUTION: An insertion of a DVD is identified(S110). A number of counting is initialized when the DVD is inserted(S120). A disk key among disk information stored in a header of the DVD is detected(S130). The disk key is decoded when the disk key is detected(S140). The disk key is verified according to the decoded content(S150). A number of counting is increased with 1 when the disk key is not verified and then it is judged as to whether the increased counting value is identical to a predetermined value(S150,S160). A copy preventing mode is performed and the copy of data of the DVD is prevented when the increased counting value is identical to the predetermined value, and then a bit stream is directly outputted and data is reproduced(S210,S220). It is judged as to whether data of the DVD is scrambled when the disk key is verified(S310).

Description

디브이디의 데이터 재생 방법How to play data on DVD

본 발명은 디브이디(Digital Video Disc : DVD)의 데이터 재생 방법에 관한 것으로, 더욱 상세하게는 디브이디를 포맷(Format)에 어긋나게 제작한 경우 디스크 키가 올바르고, 비트 스트림(Bit Stream)만 정상적으로 기록되어 있으면 디브이디에 기록된 데이터를 재생 및 복사할 수 있도록 하는 디브이디의 데이터 재생 방법에 관한 것이다.The present invention relates to a data playback method of a digital video disc (DVD). More specifically, when a DVD is produced in a format that is inconsistent with a format, a disc key is correct and only a bit stream is normally recorded. The present invention relates to a data reproducing method of a DVD, which makes it possible to reproduce and copy data recorded on the DVD.

일반적으로, 디지털 비디오 디스크(Digital Video Disc: DVD, 이하 '디브이디'라 칭함)는 씨디 롬 디스크보다 진보된 새로운 광학 디스크 기술이다. 디브이디는 양면에 17기가바이트의 비디오, 오디오, 기타 데이터를 저장할 수 있다.In general, Digital Video Discs (DVDs, hereinafter referred to as' DVD's) are new optical disc technologies that are more advanced than CD-ROM discs. DVD can store 17 gigabytes of video, audio, and other data on both sides.

이러한 디브이디에는 저장된 데이터가 무단 복제되는 것을 방지하기 위하여 데이터를 스크램블(Scramble)시켜 놓는다. 그래서 디브이디의 데이터를 해독하기 위해서는 디스크 키가 필요하며 디스크 키는 디브이디의 특정 위치 즉 헤더(Header)에 저장된다.In such a device, the data is scrambled to prevent unauthorized copying of the stored data. In order to decrypt the data of the DVD, a disk key is required, and the disk key is stored in a specific location of the DVD, that is, a header.

이러한 종래의 디브이디의 데이터 재생 방법은 디브이디 상에 기록되어 있는 디스크 정보를 읽어온 후 디스크 키를 검출하고, 스크램블되어 있는 데이터를 디스크 키로 디스크램블(Descramble)시켜 데이터를 재생한다.The conventional DVD data reproducing method reads the disc information recorded on the DVD, detects the disc key, and descrambles the scrambled data with the disc key to reproduce the data.

그런데, 이와 같은 종래의 디브이디의 데이터 재생 방법에 의하면 다음과 같은 문제점들이 발생한다.However, according to the conventional DVD data reproducing method, the following problems occur.

첫 번째로, 제작자의 잘못 등으로 인하여 디브이디의 포맷이 잘못(즉, 포맷 위반)되고, 디스크 키가 올바른 경우에는 포맷 위반으로 디브이디의 데이터를 재생 및 복사할 수 없다.First, if the format of the DVD is wrong (i.e., a format violation) due to the manufacturer's fault or the like, and the disc key is correct, the DVD's data cannot be played back and copied due to the format violation.

두 번째로, 디스크 키가 디브이디에는 존재하지 않으나 존재하는 것으로 인식되면 디브이디의 데이터가 복사된다.Secondly, if the disk key does not exist on the DVD but is recognized as present, the DVD's data is copied.

따라서, 본 발명은 이와 같은 문제점들을 해결하기 위한 것으로서, 본 발명의 첫 번째 목적은 디브이디의 포맷이 잘못되어도 디스크 키가 올바른 경우에는 디브이디의 데이터가 재생 및 복사되도록 한다.Accordingly, the present invention has been made to solve the above problems, and the first object of the present invention is to allow the DVD data to be played back and copied when the disc key is correct even if the DVD format is incorrect.

본 발명의 두 번째 목적은 디브이디에 디스크 키가 존재하지 않는 경우에 디브이디의 데이터가 복사되는 것을 방지할 수 있다.A second object of the present invention can prevent the DVD data from being copied when there is no disk key in the DVD.

도 1은 본 발명에 의한 디브이디의 데이터 재생 방법을 설명하기 위한 동작 흐름도이다.1 is a flowchart illustrating a method of reproducing a data of a DVD according to the present invention.

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

S100 : 검증 확인 단계 S200 : 재생 단계S100: Verification confirmation step S200: Regeneration step

이와 같은 목적들을 달성하기 위한 본 발명의 특징은, 디브이디의 소정 영역에 존재하는 디스크 정보를 해독하여 디스크 정보 내에 디스크 키가 검증되는지의 여부를 확인하고; 확인 결과, 디스크 키가 검증되지 않으면 복사 방지 모드를 실행하여 디브이디의 데이터가 복사되는 것을 차단하고, 디브이디의 데이터를 디스크램블하지 않고 입력되는 비트 스트림을 그대로 출력하여 디브이디의 데이터를 재생시키도록 하는 점에 있다.A feature of the present invention for achieving these objects is to verify whether a disk key is verified in the disk information by decrypting the disk information present in the predetermined area of the DVD; If the disc key is not verified, copy protection mode is executed to prevent the DVD data from being copied, and the input bit stream is output as it is without descramble the DVD data to play the data of the DVD. Is in.

여기서, 디브이디의 데이터 재생 방법은 디스크 키가 검증되면 복사 모드를 수행하여 디브이디의 데이터가 복사되는 것을 허용하고, 스크램블된 디브이디의 데이터를 디스크램블하여 디브이디의 데이터를 재생한다.Here, the DVD data reproducing method performs a copy mode when the disk key is verified, permits the data of the DVD to be copied, and descrambles the data of the scrambled DVD to reproduce the data of the DVD.

한편, 디스크 키가 검증되는지의 여부를 확인하기 위해서는 디브이디가 삽입되는지를 검출하고; 디브이디가 삽입되면 카운팅 값을 초기화하고, 디스크 키를 검출하여 디스크 키를 해독하며; 디스크 키가 검증되지 않으면 카운팅 값을 증가하여 디스크 키의 검증을 기 설정된 횟수동안 실행한다.On the other hand, in order to confirm whether or not the disk key is verified, it is detected whether a DVD is inserted; When the DVD is inserted, initialize the counting value, detect the disk key to decrypt the disk key; If the disk key is not verified, the counting value is increased to verify the disk key for a preset number of times.

이하, 본 발명의 바람직한 실시예에 대하여 첨부도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의한 디브이디의 데이터 재생 방법을 설명하기 위한 동작 흐름도이다.1 is a flowchart illustrating a method of reproducing a data of a DVD according to the present invention.

본 발명은 디브이디의 소정 영역에 존재하는 디스크 정보를 해독하여 디스크 정보 내에 디스크 키가 검증되는지의 여부를 확인하는 검증 확인 단계(S100); 확인 결과, 디스크 키가 검증되지 않으면 복사 방지 모드를 실행하여 디브이디의 데이터가 복사되는 것을 차단하며, 디브이디의 데이터를 디스크램블하지 않고 입력되는 비트 스트림을 그대로 출력하여 디브이디의 데이터를 재생시키는 재생 단계(S200)를 포함하여 구성된다.According to the present invention, a verification verification step (S100) of verifying whether or not a disk key is verified in the disk information by decrypting the disk information existing in the predetermined area of the DVD; If the disc key is not verified, the copy protection mode is executed to prevent the DVD data from being copied, and the playback step of reproducing the data of the DVD by outputting the input bit stream as it is without descramble the data of the DVD ( S200) is configured to include.

이하, 본 발명에 의한 디브이디의 데이터 재생 방법의 작용을 도 1을 참조하여 상세하게 설명하면 다음과 같다.Hereinafter, the operation of the data playback method of the DVD according to the present invention will be described in detail with reference to FIG.

먼저, 디브이디가 삽입되는 것을 확인하여(S110), 디브이디가 삽입되면 카운팅 횟수를 초기화시키고(S120), 디브이디의 헤더에 저장된 디스크 정보중 디스크 키를 검출한다(S130).First, it is checked that the DVD is inserted (S110), when the DVD is inserted, the counting count is initialized (S120), and the disk key is detected from the disk information stored in the header of the DVD (S130).

그리고, 디스크 키가 검출되면 디스크 키를 해독한 후(S140), 해독 내용에 따라 디스크 키를 검증한다(S150).When the disk key is detected, the disk key is decrypted (S140), and the disk key is verified according to the decrypted contents (S150).

그래서, 디스크 키가 검증되지 않으면 카운팅 횟수에 1을 증가시킨 후(S150), 증가시킨 카운팅 값이 기 설정된 값과 동일한지를 판단한다(S160). 그리하여, 카운팅 값과 기 설정된 값이 동일하면 복사 방지 모드를 실행하여 디브이디의 데이터가 복사되는 것을 방지하고(S210), 또한 디브이디에서 입력되는 비트 스트림을 그대로 출력하여 데이터를 재생시킨다(S220).Thus, if the disk key is not verified, it is determined by increasing 1 to the counting number (S150), and then determining whether the increased counting value is equal to the preset value (S160). Thus, if the counting value and the preset value are the same, the copy protection mode is executed to prevent the data of the DVD from being copied (S210), and the bit stream input from the DVD is output as it is to reproduce the data (S220).

그리고, 단계 150(S150)에서 디스크 키가 검증되면 디브이디의 데이터가 스크램블되어 있는지를 검출하여(S310), 데이터가 스크램블되어 있으면 복사 모드를 실행하여 데이터의 복사가 가능하도록 하고(S320), 또한 데이터를 디스크램블시켜 재생시킨다(S330).When the disk key is verified in step 150 (S150), it is detected whether the data of the DVD is scrambled (S310). If the data is scrambled, the copy mode is executed to enable the copying of the data (S320). To descramble and play (S330).

또한, 단계 170(S170)에서 카운팅값이 기 설정된 값과 동일하지 않으면 단계 150(S150)으로 복귀하여 단계 150(S150) 이 후의 과정을 수행한다.In addition, if the counting value is not the same as the preset value in step 170 (S170), the process returns to step 150 (S150) and the process after step 150 (S150) is performed.

따라서, 제작자가 디브이디를 어긋나게 제작하여도 디스크 키가 존재하고 디브이디의 단순한 포맷 위반인 경우에는 디브이디의 데이터를 재생 및 복사할 수 있으며, 디스크 키가 올바르지 않는 경우 즉, 디스크 키가 없는 경우에는 데이터의 재생만 가능하도록 한다.Therefore, even if the disc is produced by the disc player, the disc data can be played and copied if the disc key exists and violates the simple format of the disc. If the disc key is not correct, that is, the disc key is missing, Only playback is possible.

이와 같이, 본 발명의 상세한 설명에서는 구체적인 실시예에 관해 설명하였으나, 본 발명의 범주에서 벗어나지 않는 한도내에서 여러 가지 변형이 가능함은 물론이다. 그러므로, 본 발명의 범위는 설명된 실시예에 국한되어 정해져서는 안되며 후술하는 특허청구범위 뿐만 아니라 이 특허청구범위와 균등한 것들에 의해 정해져야 한다.As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

이상에서 설명한 바와 같이 본 발명에 의하면 다음과 같은 이점들이 발생한다.As described above, according to the present invention, the following advantages occur.

즉, 디브이디의 포맷이 잘못되어도 디스크 키가 올바른 경우에는 디브이디의 데이터가 재생 및 복사되도록 한다.That is, even if the format of the DVD is incorrect, if the disk key is correct, the data of the DVD is reproduced and copied.

또한, 디브이디에 디스크 키가 존재하지 않는 경우에 디브이디의 데이터가 복사되는 것을 방지할 수 있다.In addition, when the disc key does not exist in the DVD, the data of the DVD can be prevented from being copied.

Claims (3)

디브이디(DVD)의 소정 영역에 존재하는 디스크 정보를 해독하여 상기 디스크 정보 내에 디스크 키가 검증되는지의 여부를 확인하는 검증 확인 단계; 및A verification verification step of verifying whether or not the disk key is verified in the disk information by decrypting the disk information existing in the predetermined area of the DVD; And 확인 결과, 상기 디스크 키가 검증되지 않으면 복사 방지 모드를 실행하여 상기 디브이디의 데이터가 복사되는 것을 차단하며, 상기 디브이디의 데이터를 디스크램블(Descramble)하지 않고 입력되는 비트 스트림(Bit Stream)을 그대로 출력하여 상기 디브이디의 데이터를 재생시키는 재생 단계를 포함하는 것을 특징으로 하는 디브이디의 데이터 재생 방법.As a result of the check, if the disk key is not verified, the copy protection mode is executed to block the data of the DVD from being copied, and the bit stream input without being descrambled of the DVD data is output as it is. And a reproducing step of reproducing the data of the DVD. 제 1 항에 있어서, 상기 디브이디의 데이터 재생 방법은,The method of claim 1, wherein the DVD data reproducing method, 상기 디스크 키가 검증되면 복사 모드를 실행하여 상기 디브이디의 데이터가 복사되도록 하고, 스크램블(Scramble)된 상기 디브이디의 데이터를 디스크램블하여 상기 디브이디의 데이터를 재생하는 단계를 더 포함하는 것을 특징으로 하는 디브이디의 데이터 재생 방법.And if the disk key is verified, executing a copy mode to copy the data of the DVD, and descrambled the data of the scrambled DVD to reproduce the data of the DVD. Data playback method. 제 1 항에 있어서, 상기 검증 확인 단계는,The method of claim 1, wherein the verifying verification step, 상기 디브이디가 삽입되는지를 검출하는 단계;Detecting whether the DVD is inserted; 상기 디브이디가 삽입되면 카운팅 값을 초기화하고, 상기 디스크 키를 검출하여 상기 디스크 키를 해독하는 단계;Initializing a counting value when the DVD is inserted, and detecting the disk key to decrypt the disk key; 상기 디스크 키가 검증되지 않으면 상기 카운팅 값을 증가하여 상기 디스크 키의 검증을 기 설정된 횟수동안 실행하는 단계를 더 포함하는 것을 특징으로 하는 디브이디의 데이터 재생 방법.And if the disk key is not verified, increasing the counting value to execute verification of the disk key for a predetermined number of times.
KR10-1998-0039432A 1998-09-23 1998-09-23 How to play data on DVD KR100381649B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030003998A (en) * 2001-07-04 2003-01-14 장용 CD,DVD's Illegal Copy or Install Protection System
KR100472445B1 (en) * 2002-04-22 2005-03-08 삼성전자주식회사 Display apparatus and method for processing digital versatile disc signal prevented copy
KR100608337B1 (en) * 1999-03-09 2006-08-02 소니 가부시끼 가이샤 Reproducing apparatus and information distribution system
KR100830450B1 (en) * 2001-12-29 2008-05-20 엘지전자 주식회사 Method for controlling descramble in DVD player

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100608337B1 (en) * 1999-03-09 2006-08-02 소니 가부시끼 가이샤 Reproducing apparatus and information distribution system
KR20030003998A (en) * 2001-07-04 2003-01-14 장용 CD,DVD's Illegal Copy or Install Protection System
KR100830450B1 (en) * 2001-12-29 2008-05-20 엘지전자 주식회사 Method for controlling descramble in DVD player
KR100472445B1 (en) * 2002-04-22 2005-03-08 삼성전자주식회사 Display apparatus and method for processing digital versatile disc signal prevented copy

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