KR20010011788A - Digital data recording and playback method for preventing copy - Google Patents

Digital data recording and playback method for preventing copy Download PDF

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Publication number
KR20010011788A
KR20010011788A KR1019990031320A KR19990031320A KR20010011788A KR 20010011788 A KR20010011788 A KR 20010011788A KR 1019990031320 A KR1019990031320 A KR 1019990031320A KR 19990031320 A KR19990031320 A KR 19990031320A KR 20010011788 A KR20010011788 A KR 20010011788A
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South Korea
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digital data
duplication
reproduction
recording
command
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KR1019990031320A
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Korean (ko)
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KR100620017B1 (en
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주민기
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구자홍
엘지전자 주식회사
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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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00333—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in header data, e.g. in sector headers
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00166—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
    • G11B20/00181—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0012—High speed serial bus, e.g. IEEE P1394

Abstract

PURPOSE: A method for recording and reproducing duplication-prevented digital data are provided so that illegal digital data cannot be outputted by intercepting an input command button or remote controller command. CONSTITUTION: When a digital data is inputted, whether the input digital data can be duplicated is confirmed by extracting header information of the digital data. When the digital data cannot be duplicated, recording command interception and reproduction prevention are set up, and duplication prevention is marked on the digital data. On the other hand, when the digital data can be duplicated, bits are decided as duplication prevention, and commands are executed. Thereafter, a mode is set up as a duplication mode, and a normal operation is performed. Accordingly, flow of data or use of commands are prevented by intercepting an input command button or remote controller command, thereby preventing illegal digital data from being externally outputted. In addition, whether the digital data can be duplicated is judged in the reproduction operation of the data as well as the recording operation thereof, which results in improved reliability of the duplication-prevented digital data.

Description

복제방지용 디지탈 데이터 기록 및 재생방법{DIGITAL DATA RECORDING AND PLAYBACK METHOD FOR PREVENTING COPY}Digital data recording and playback method for copy protection {DIGITAL DATA RECORDING AND PLAYBACK METHOD FOR PREVENTING COPY}

본 발명은 복제방지용 디지탈 데이터 기록 및 재생방법에 관한 것으로, 특히 디지탈기기간의 데이터 교환시 복제방지를 위해 데이터의 헤더정보에 3비트의 제어코드를 송신기기의 데이터전송시 수정하여 수신단에서의 이를 분석하여 복제가능여부와 재생가능여부를 판단하여 디지탈기기의 마이크로컴퓨터에서 제어코드정보를 읽어들여 복제가능여부에 따라 기기의 외부 입력버튼의 명령수행을 허가하거나 차단할 수 있도록 한 복제방지용 디지탈 데이터 기록 및 재생방법에 관한 것이다.The present invention relates to a method of recording and reproducing digital data for copy protection. In particular, a 3-bit control code is modified in the header information of the data to prevent copying during data exchange between digital devices. Copying and reproducing digital data for copy protection that allows control or read / receive of control code information from microcomputer of digital device to permit or block command execution of external input button of device It is about a method.

도1은 일반적인 디지탈데이터 복제방지장치에 대한 개략도로서, 이에 도시된 바와같이 디지탈데이터의 복제방지를 위해 복제가능 여부를 판단하여 송신측기기(10)의 송신단에서 암호화를 수행하고 수신측기기(11)의 수신단에서 복호화를 수행한다.FIG. 1 is a schematic diagram of a general digital data copy protection device. As shown in FIG. 1, it is determined whether or not a copy is possible for copy data protection by performing encryption at the transmitting end of the transmitting device 10, and receiving device 11 Decoding is performed at the receiving end.

여기서, 상기 송신측기기(10)는 컨텐츠의 CCI(Copy Control Information)를 조사하여 복제불가,한번 복제허용, 복제허용으로 분석하고, 기기 상호간의 인증작업을 별도의 키인증기관에서 확인을 얻은후 컨텐츠를 암호화하여 수신측 기기(11)에 전송하게 되는데, 상기와 같은 복제방지기술이 디지탈기기간의 일반적인 인터페이스로 사용하는 기술이 IEEEE1394로 5C(Hitachi,Intel,Matsushita,Sony,Toshiba)에서 제안하였다.In this case, the transmitting device 10 analyzes the CCI (Copy Control Information) of the content and analyzes it as non-copyable, one-time copying permission, and copying permission. The content is encrypted and transmitted to the receiving device 11, and a technology in which the copy protection technology is used as a general interface between digital devices is proposed by 5C (Hitachi, Intel, Matsushita, Sony, Toshiba) as IEEEE1394.

또한, 상기와 다른 복제방지에 대한 기술로는 제니스(Zenith)나 톰슨(Thompson)이 제안한 XCA 방식이 있는 데, 이 기술은 기록시에 CGMS(Copy Generation Management System) 정보를 분석하여 녹화 또는 녹화불가로 분류하고, 재생시에는 상기 CGMS(Copy Generation Management System) 정보에 관계 없이 재생기능을 수행한다.In addition, as another technique for copy protection, there is an XCA method proposed by Zenith or Thompson, which can not record or record by analyzing CGMS (Copy Generation Management System) information at the time of recording. And the playback function is performed regardless of the CGMS (Copy Generation Management System) information.

즉, 상기와 같이 디자탈기기간의 일반적인 인터페이스로 사용되는 기술이 IEEE1394인데, 이 IEEE1394의 링크 레이어에 암호화,복호화 알고리즘과 키인증 절차를 구현하기 위해 로직이 추가되어야 하고, 또한 인증절차를 거쳐야하기 때문에 시간이 많이 걸리는 문제점이 있었다.That is, the technology used as a general interface between the digital devices as described above is IEEE1394. In order to implement encryption and decryption algorithms and key authentication procedures in the IEEE 1394 link layer, logic must be added and authentication procedures must be performed. There was a time-consuming problem.

따라서, 상기와 같은 문제점을 감안하여 창안한 본 발명은 디지탈 기기간의 데이터 교환시 복제방지를 위해 데이터의 헤더정보에 3비트의 제어코드를 송신기기의 데이터전송시 수정하여 수신단에서의 이를 분석하여 복제가능여부와 재생가능여부를 판단하고, 디지탈기기의 마이크로컴퓨터에서 제어코드정보를 읽어들여 복제가능여부에 따라 기기의 외부 입력버튼의 명령수행을 허가하거나 차단할 수 있도록 한 복제방지용 디지탈 데이터 기록 및 재생방법을 제공함에 그 목적이 있다.Therefore, in view of the above problems, the present invention is to modify the three-bit control code in the header information of the data during transmission of the transmitter in order to prevent the data exchange between the digital devices in the data transmission of the transmitter to analyze and replicate it The method of recording and reproducing copy data for preventing copying by judging whether it can be played back or not, and by allowing control code information to be read from the microcomputer of the digital device to permit or block command execution of the external input button of the device. The purpose is to provide.

도1은 일반적인 디지탈데이터 복제방지장치에 대한 개략도.1 is a schematic diagram of a general digital data copy protection device.

도2는 본 발명 복제방지용 디지탈 데이터 기록방법에 대한 동작흐름도.Figure 2 is a flow chart of the operation of the present invention for copy protection digital data recording method.

도3은 본 발명 복제방지용 디지탈 데이터 재생방법에 대한 동작흐름도.Figure 3 is a flow chart of the operation of the copy data protection method of the present invention.

도4는 도2에 있어서, 디지탈 데이터 기록방법에 대한 동작 흐름을 보인 블록도.4 is a block diagram showing an operation flow for the digital data recording method in FIG.

도5는 디지탈 데이터의 헤더의 구성을 보인 블록도.Fig. 5 is a block diagram showing the configuration of a header of digital data.

도6은 본 발명 복제방지용 디지탈 데이터 기록방법의 다른 실시예에 대한 동작 흐름을 보인 블록도.Figure 6 is a block diagram showing an operation flow of another embodiment of the present invention for preventing copy data recording method.

상기와 같은 목적을 달성하기 위한 본 발명은 입력되는 디지탈데이터의 헤더정보를 추출하여 복제가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 복제불가이면 기록명령 차단 및 재생불가로 설정한후 복제불가를 표시하고, 한번 복제이면 복제불가로 비트를 설정하여 명령 수행한후 다시 재생가능으로 설정한후 정상동작을 수행하는 제2 단계로 수행함을 특징으로 한다.The present invention for achieving the above object comprises a first step of extracting the header information of the input digital data to determine whether or not duplication; If the result of the determination in the first step is duplication not possible, the recording command is set to be blocked and the reproduction is impossible and duplication is indicated. Characterized in that the second step to perform.

상기와 같은 목적을 달성하기 위한 본 발명은 입력되는 디지탈데이터의 헤더정보를 추출하여 재생가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 재생불가이면 재생명령 차단한후 재생불가를 표시하거나 안내음성을 출력하고, 재생가능이면 재생명령을 수행한후 정상동작하는 제2 단계로 수행함을 특징으로 한다.The present invention for achieving the above object is a first step of extracting the header information of the input digital data to determine whether or not playable; If the result of the determination of the first step is not possible to play, after the playback command is blocked, the playback is not displayed or a guide voice is output. If the playback is possible, the playback command is performed.

이하, 본 발명에 의한 복제 방지용 디지탈 데이터 기록및 재생방법에 대한 작용및 효과를 첨부한 도면을 참조하여 상세히 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, operations and effects of a copy protection digital data recording and reproducing method according to the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명 복제방지용 디지탈 데이터 기록방법에 대한 동작흐름도로서, 이에 도시한 바와같이 입력되는 디지탈데이터의 헤더정보를 추출하여 복제가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 복제불가이면 기록명령 차단 및 재생불가로 설정한후 복제불가를 표시하고, 한번 복제이면 복제불가로 비트를 설정하여 명령 수행한후 다시 재생가능으로 설정한후 정상동작을 수행하는 제2 단계로 이루어진다.FIG. 2 is a flowchart illustrating a method of recording a digital data for preventing copying according to the present invention, wherein a first step of determining whether copying is possible by extracting header information of input digital data as shown in FIG. If the result of the determination in the first step is duplication not possible, the recording command is set to be blocked and the reproduction is impossible, and the duplication is indicated, and once duplication, the bit is set to no duplication. A second step is performed.

도3은 본 발명 복제방지용 디지탈 데이터 재생방법에 대한 동작흐름도로서, 이에 도시한 바와같이 입력되는 디지탈 데이터의 헤더 정보를 추출하여 재생가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 재생불가이면 재생명령 차단한후 재생불가를 표시하거나 안내음성을 출력하고, 재생가능이면 재생명령을 수행한후 정상동작하는 제2 단계로 이루어지며, 이와 같은 본 발명의 동작을 설명한다.FIG. 3 is a flowchart illustrating a method of reproducing digital data for copy protection according to the present invention, comprising: a first step of extracting and reproducing header information of input digital data as shown in the figure; If the result of the determination in the first step is not playable, the play command is blocked and then the playout is displayed or a guide voice is output. If the playability is possible, the playout is performed. Describe the operation.

도4에서 보는 바와같이, 기록시 기기의 입력버튼이나 리모콘을 통해 기록에 대한 명령이 입력되면, 미리 마이크로컴퓨터가 디지탈데이터의 복제가능 여부를 인지하고 있다가 복제불가이면 기록명령을 차단시키고 재생가능 비트를 재생불가로 설정하고, 또한 복제불가라는 것을 화면 디스플레이기기나 디지탈표시장치에 표시하거나 사전에 녹음한 음성메시지를 출력한다.As shown in Fig. 4, when a recording command is input through the input button or the remote controller of the device at the time of recording, the microcomputer recognizes whether the digital data can be copied in advance, and if the copy is impossible, the recording command can be interrupted and reproduced. The bit is set to be non-playable and a non-replicated signal is displayed on a screen display device or a digital display device or a prerecorded voice message is output.

이때, 도5는 헤더의 구성을 보인 개략도로서, 복제방지 제어비트와 재생 제어비트로 나누어지는데, 상기 복제방지 제어비트는 2비트로 이루어져 복제불가,한번복제가능,복제가능으로 표현할 수 있고, 상기 재생 제어비트는 1비트로 이루어져 재생불가,재생가능으로 표현할 수 있는데, 이를 참조하여 기록방법을 상세히 설명한다.At this time, Figure 5 is a schematic diagram showing the configuration of the header, which is divided into a copy protection control bit and a reproduction control bit, the copy protection control bit is composed of 2 bits can be expressed as non-copy, once copyable, replicable, the reproduction control The bit is composed of 1 bit and can be expressed as non-reproducible or reproducible. The recording method will be described in detail with reference to this.

즉, 기록시 복제불가인 경우 재생 제어비트를 '1'로 설정하여, 재생시에도 헤더정보를 마이크로컴퓨터에서 읽어들여 재생불가로 판단하도록 한다.That is, when duplication is impossible during recording, the reproduction control bit is set to '1' so that the header information is read from the microcomputer and judged as non-reproduction even during reproduction.

만약, 재생 제어비트가 '0'인 경우에는 정상적인 기록명령에 의한 것으로 판단하여 재생 가능하도록 한다.If the regeneration control bit is '0', it is determined that the regeneration control bit is a normal recording command, and the regeneration control bit is enabled.

그리고, 도3과 같이 재생시에도 헤더정보를 판단하여 재생불가이면 재생명령을 차단하여 재생불가를 표시하거나 안내방송을 하여 재생을 방지하는데, 즉 입력되는 디지탈 데이터의 헤더 정보를 추출하여 재생가능 여부를 판단하여 재생불가이면 재생명령 차단한후 재생불가를 표시하거나 안내음성을 출력하도록 제어하고, 재생가능이면 재생명령을 수행한후 정상 동작하도록 제어한다.Also, as shown in FIG. 3, the header information is judged at the time of reproduction, and if the reproduction is not possible, the reproduction instruction is blocked to display the reproduction inability or the announcement is performed to prevent the reproduction. That is, whether header information of the input digital data can be extracted and reproduced. If it is determined that the playback is not possible, the controller blocks the playback command and then displays the playback impossible or outputs a guide voice. If the playback is possible, the controller performs normal operation after performing the playback command.

다시 말하면, 본 발명은 디지탈 데이터의 흐름을 원활하게 하면서도 마이크로컴퓨터가 디지탈 데이터의 헤더정보를 판단하여 입력버튼이나 리모콘의 기록명령과 재생명령을 제어하여 디지탈 데이터의 복제를 방지한다.In other words, while the present invention facilitates the flow of digital data, the microcomputer determines the header information of the digital data and controls the recording command and the playback command of the input button or the remote control to prevent the copying of the digital data.

도6은 본 발명의 다른 실시예의 동작 흐름을 보인 블록도로서, 입력되는 디지탈데이터의 헤더정보를 판단하여 기록시뿐만 아니라 재생시에도 마이콤의 입력명령을 정상동작시키거나 차단하여 데이타의 불법사용을 방지하는데, 이때 암호화, 복호화 과정을 생략하여 복잡한 처리 단계를 줄일 수 있다.6 is a block diagram showing an operation flow of another embodiment of the present invention, in which the header information of the input digital data is judged to normally operate or block the input command of the microcomputer not only during recording but also during playback to prevent illegal use of data. In this case, a complicated processing step can be reduced by omitting encryption and decryption processes.

이상에서 상세히 설명한 바와같이 본 발명은 기기의 외부로 허가받지 않은 불법 디지탈데이터의 출력을 입력명령버튼이나 리모콘 명령을 차단하여 데이터의 흐름뿐만 아니라 명령의 사용까지 방지하며, 또한 기록시와 별도로 재생시에도 재생가능여부를 판단하여 간단하게 안정성을 확보할 수 있는 효과가 있다.As described in detail above, the present invention prevents not only the flow of data but also the use of a command by blocking an input command button or a remote control command for outputting illegal digital data that is not permitted to the outside of the device, and also during playback separately from recording. Judging whether or not it can be reproduced, there is an effect that can simply secure the stability.

Claims (4)

입력되는 디지탈데이터의 헤더정보를 추출하여 복제가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 복제불가이면 기록명령 차단 및 재생불가로 설정한후 복제불가를 표시하고, 한번 복제이면 복제불가로 비트를 설정하여 명령 수행한후 다시 재생가능으로 설정한후 정상동작을 수행하는 제2 단계로 수행함을 특징으로 하는 복제 방지용 디지탈 데이터 기록방법.A first step of extracting header information of input digital data to determine whether duplication is possible; If the result of the determination in the first step is duplication not possible, the recording command is set to be blocked and the reproduction is impossible and duplication is indicated. A copy protection digital data recording method, characterized in that performed in the second step. 제1 항에 있어서, 디지탈데이터의 헤더는 2비트의 복제방지 제어비트와 1비트의 재생제어비트로 이루어진 것을 특징으로 하는 복제 방지용 디지탈 데이터 기록방법.2. The method of claim 1, wherein the header of the digital data comprises a 2-bit copy protection control bit and a 1-bit reproduction control bit. 입력되는 디지탈데이터의 헤더정보를 추출하여 재생가능 여부를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 재생불가이면 재생명령 차단한후 재생불가를 표시하거나 안내음성을 출력하고, 재생가능이면 재생명령을 수행한후 정상동작하는 제2 단계로 수행함을 특징으로 하는 복제 방지용 디지탈 데이터 재생방법.A first step of extracting header information of the input digital data to determine whether it is playable; If the reproduction of the first step is not possible, the reproduction command is blocked and then the reproduction command is displayed or the guide voice is output. If the reproduction is possible, the copy protection is performed. How to play data. 제3 항에 있어서, 디지탈데이터의 헤더는 2비트의 복제방지 제어비트와 1비트의 재생제어비트로 이루어진 것을 특징으로 하는 복제 방지용 디지탈 데이터 재생방법.The method of claim 3, wherein the header of the digital data comprises two bits of copy protection control bits and one bit of reproduction control bits.
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