KR20040026204A - Digital Audio Reproduction System of External Memory Device access and Security key function - Google Patents

Digital Audio Reproduction System of External Memory Device access and Security key function Download PDF

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KR20040026204A
KR20040026204A KR1020020057573A KR20020057573A KR20040026204A KR 20040026204 A KR20040026204 A KR 20040026204A KR 1020020057573 A KR1020020057573 A KR 1020020057573A KR 20020057573 A KR20020057573 A KR 20020057573A KR 20040026204 A KR20040026204 A KR 20040026204A
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digital
audio
external
format
signal
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KR1020020057573A
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Korean (ko)
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강봉균
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주식회사 넥스템
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Publication of KR20040026204A publication Critical patent/KR20040026204A/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
    • G11B20/00086—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
    • G11B20/00485—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 characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
    • G11B20/00492—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 characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/286—Antitheft arrangements, e.g. Electronic Article Surveillance [EAS] tags
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
    • G11B31/02—Arrangements for the associated working of recording or reproducing apparatus with related apparatus with automatic musical instruments
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
    • G10H2250/541—Details of musical waveform synthesis, i.e. audio waveshape processing from individual wavetable samples, independently of their origin or of the sound they represent
    • G10H2250/571—Waveform compression, adapted for music synthesisers, sound banks or wavetables
    • G10H2250/591—DPCM [delta pulse code modulation]
    • G10H2250/595—ADPCM [adaptive differential pulse code modulation]
    • 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
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/60—Solid state media
    • G11B2220/61—Solid state media wherein solid state memory is used for storing A/V content

Abstract

PURPOSE: A multiple digital audio playing system having an external memory interface and a security key function is provided to play diverse digital audio media and record voice information by using an USB(Universal Serial Bus) storing medium, and prevent a burglary by comparing the encryption information stored in a system with the encrypted information in the USB storing medium. CONSTITUTION: A microprocessor(100) controls operation of entire system. An external audio input part(110) receives input from an external stereo device. An ADC(Analog Digital Converter) converts an inputted analog signal into a digital signal. A microphone(111) converts a voice signal into an electric signal. An ADPCM(Adaptive Differential Pulse Code Modulation)(121) directly compresses/stores the electric signal inputted from the microphone. A USB host controller(160) interfaces an USB typed external memory media. A switch(170) controls a path of the audio data signal depending on a format of the signal inputted from the microprocessor. A CD format decoder(300) plays the audio data of a CD format. A digital format decoder(400) plays the audio data in a digital format.

Description

외부 메모리 인터페이스 및 보안키 기능을 가진 다중 디지털 오디오재생 시스템{Digital Audio Reproduction System of External Memory Device access and Security key function}Digital Audio Reproduction System of External Memory Device access and Security key function}

본 발명은 디지털방식 오디오재생시스템에 있어서 일반적 재생 매체인 콤팩트디스크방식 오디오재생뿐만 아니라 외부 메모리장치에 파일형태의 오디오 데이터도 재생가능토록한 다중미디어 재생기능을 가지는 복합형 재생기능뿐만아니라 본 발명의 디지털 오디오 재생 시스템의 분실이나 도난에 대비한 보안키 기능을 추가한 다중 미디어 재생기능을 가짐과 아울러 보안키 기능을 가지는 복합형 디지털 오디오 시스템과 관련한 발명이다. 본 발명과 관련한 종래 기술로는 최근의 멀티 미디어 특히 MPEG방식 오디오 형식을 지원하는 콤팩트디스크방식 기술이 있다. 즉 일반적인 콤팩트디스크방식은 cda형식의 순수 오디오 형식만 지원하나 최근의 MP3형식의 다양한 콘텐트가 보급되면서 cda형식의 순수 오디오 형식 뿐만 아니라 MP3방식도 동시 지원하는 오디오 시스템이 등장하기 시작하였다. 본 발명은 이러한 다중미디어 재생기능과 아울러 외부 저장장치 혹은 매체로부터도 직접 재생 가능토록 하였고 더불어 이러한 외부 저장장치에 보안기능을 가지는 시큐리티코드를 부여하여 본 발명의 디지털 오디오재생시스템의 컨트롤 마이크로프로세서에서 사용자가 입력한 비밀번호와의 비교기능을 추가하여 본 발명의 디지털 다중재생시스템의 분실 도난 등에 대비하였다.The present invention is not only a compact disc type audio reproducing medium which is a general reproducing medium in a digital audio reproducing system, but also a complex reproducing function having a multi media reproducing function such that audio data in a file form can be reproduced in an external memory device. The present invention relates to a complex digital audio system having a security key function as well as a multi media playback function in which a security key function is added in preparation for the loss or theft of the digital audio playback system. Conventional technology related to the present invention is a recent compact disc technology that supports multimedia, especially the MPEG audio format. In other words, the general compact disc method supports only pure audio format of cda format, but with the recent spread of various contents of MP3 format, audio system supporting simultaneous MP3 format as well as pure audio format of cda format has begun to emerge. According to the present invention, the multimedia playback function can be directly reproduced from an external storage device or a medium, and a security code having a security function can be assigned to the external storage device. By adding a comparison function with the input password is prepared for theft and the like of the digital multi-playback system of the present invention.

본 발명은 상기한 다중미디어 재생기능을 가능토록 하기 위해 마이크로프로세서를 중심으로 하여 디지털 미디어 즉 MP3, AA3, WMA, ADPCM..를 복원가능하도록하기위해 다중 디코딩기능을 구비하였고 또한 보안키 기능을 구현하기 위해 USB방식의 외부 메모리장치로부터의 읽은 암호화 키정보와 본 발명의 시스템 내에 기 수록되어있는 암호화 정보와 비교하여 사용 허가여부를 제어할 수 있는 기능을 부가하였다. 또한 외부 임의의 메모리저장 매체와의 유효 디지털 음악데이터를 이용 디지털 재생을 가능케하기위해 멀티형식(MP3, AA3, WMA, ADPCM..)의 디코딩기능을 추가하였다. 또한 이동중이거나 기타 필요에 따라 음성신호를 저장가능케하기위해 외부 마이크입력부와 음성오디오압축부를 부설하였다.The present invention has a multi-decoding function to enable the restoration of digital media, i.e., MP3, AA3, WMA, ADPCM .., with a microprocessor in order to enable the multi-media playback function. To this end, a function for controlling whether to use or not is compared with the encryption key information read from the USB memory device and the encryption information stored in the system of the present invention. In addition, multi-format (MP3, AA3, WMA, ADPCM ..) decoding function has been added to enable digital playback using valid digital music data with any external memory storage media. In addition, an external microphone input unit and an audio audio compression unit were installed to enable storage of voice signals according to moving or other needs.

도 1 본 발명의 전체 블록다이어그램1 is a complete block diagram of the present invention.

도 2 본 발명의 모드별 동작 플로우챠트2 is a flow chart for each mode of the present invention

도 3 본 발명의 보안키 동작 플로우챠트3 is a flowchart illustrating the operation of the security key of the present invention.

도 1 은 본 발명의 전체 블록다이어그램을 나타낸 것으로 본 발명의 전체 시스템의 동작을 제어하는 마이크로프로세서[100]와 외부 스테레오 기기로부터의 입력을 가능케 하는 외부 오디오신호 입력부[110]과 입력된 아날로그신호를 디지털 형태로 변환하는 A/D변환부[120]과 외부의 음성신호를 전기적신호로 변환하는 마이크부[111]과 입력된 전기적 신호를 직접 압축하면서 저장이 가능토록 하기 위한 ADPCM부[121] 그리고 본 시스템의 여러 가지 상태를 표시해주기위한 액정 디스플레이부 [130]와 일반적 오디오 재생기기인 콤팩트디스크 플레이어부[140]과 본 시스템의 여러 가지 기능을 사용자가 직접 제어할 수 있도록 한 키매트릭스부[150]와 USB방식 외부 메모리매체[200]를 인터페이스 하기 위한 USB HOST제어장치[160], 그리고 마이크로프로세서[100]에 입력된 신호의 형식에 따라 오디오 데이터신호의 경로를 제어하기 위한 스위칭부[170]와 콤팩트디스크(CD) 형식의 오디오데이터를 재생하기 위한 CD형식 오디오데이터 디코더[300]와 MPEG등의 디지털형식의 오디오 데이터를 재생하기 위한 디지탈미디어재생부[400]을 주요 구성으로 한다.Figure 1 shows the entire block diagram of the present invention, the microprocessor [100] for controlling the operation of the entire system of the present invention and the external audio signal input unit [110] for input from an external stereo device and the input analog signal A / D conversion unit 120 for converting to a digital form, a microphone unit for converting an external voice signal into an electrical signal [111] and an ADPCM unit [121] for enabling storage while directly compressing the input electrical signal; A liquid crystal display unit 130 for displaying various states of the system, a compact disc player unit 140 which is a general audio player, and a key matrix unit for allowing a user to directly control various functions of the system. ] And USB HOST controller [160] for interfacing the external USB memory device [200], and the input signal to the microprocessor [100]. A digital audio format such as a CD format audio data decoder [300] for playing audio data in a compact disc (CD) format and a CD format audio data decoder [300] for controlling the path of an audio data signal according to the format of The digital media player [400] for playback is a main configuration.

도 2는 본 발명의 모드별 동작 플로우챠트로서 그 동작에 대해 보면 마이크로프로세서[100]이 중앙 통제장치로 작용하고 있으며 우선 외부 키입력부[150]의 기능선택[20]에 의해 CD, USB, 외부입력 3가지중 한가지가 선택되게 되며 우선 CD모드일 경우는 CD가 구동[30]을 시작하며 이에 따라 마이크로프로세서[100]은 Audio신호처리[31]를 하게 되며 처리된 결과 데이터는 오디오데이터 신호스위칭부[170]의 제어신호(Ctrl)가 "0"으로 처리되어[32], 처리 오디오데이터가 모두 CD형식 디코더부 [300]에서 모두 복원되어져 최종 오디오 앰프[500]과 스피커[600]을 거쳐 최종 오디오를 재생하게 된다. 또한 모드확인[20]에서 USB나 외부입력 모드로 선택된경우에는 외부로부터의 데이터를 읽어[40,50], 마이크로프로세서[100]은 Audio신호처리[41]를 하게 되며 처리된 결과 데이터는 오디오데이터 신호스위칭부[170]의 제어신호(Ctrl)가 "1"로 처리되어[42], 처리 오디오데이터가 모두 디지털 형식 디코더부[400]에서 모두 복원되어져 최종 오디오 앰프[500]과 스피커[600]을 거쳐 최종 오디오를 재생하게 된다. 여기서 외부 메모리매체[200]이 본 시스템에 접속되어있지 않을 경우에는 당연히 모드확인[20]에서 USB 모드는 선택이 되어지지 않을 것이다. 외부의 음성신호를 저장하기 위해서는 우선 마이크로프로세서[100]와 연결구성되어있는 키입력부[50]의 키 중에서 녹음키를 누르면 도 1의 마이크로폰[111]으로 음성신호를 받게되며 이 신호는 ADPCM부[121]에서 아날로그신호의 디지털 변환과 더불어 리얼타임 압축을 진행한다. 이렇게 디지탈화된 압축정보는 마이크로프로세서[100]에서 처리되어져 USB HOST제어장치[160]을 통해 외부 저장장치인 USB 메모리장치에 저장작용이 이루어진다. 본 발명에서는 외부 저장장치의 일 실시 예로 최근 시중에 많이 파급되고 있는 USB방식 메모리장치를 이용 하였다. 본 USB 메모리장치는 일반 컴퓨터나 노트북의 USB잭에 직접 연결 접속하여 데이터를 저장하거나 재생 그리고 파일 이동 등이 가능한 일반적인 형태의 외부 저장장치라고 볼 수 있다.FIG. 2 is a flow chart for each mode of the present invention. As for the operation, the microprocessor [100] acts as a central control device. First, CD, USB, and external devices are selected by the function selection [20] of the external key input unit [150]. One of the three inputs is selected, and in the CD mode, the CD starts to drive [30]. Accordingly, the microprocessor [100] performs audio signal processing [31] and the processed data is the audio data signal switching. The control signal (Ctrl) of the unit [170] is processed as "0" [32], and all the processed audio data is restored in the CD format decoder unit [300], and passes through the final audio amplifier [500] and the speaker [600]. Will play the final audio. In addition, when USB or external input mode is selected in the mode check [20], data from the outside is read [40, 50], and the microprocessor [100] performs audio signal processing [41]. The control signal Ctrl of the signal switching section 170 is processed as "1" [42], and all of the processed audio data is restored in the digital format decoder section 400 so that the final audio amplifier [500] and the speaker [600]. Will play the final audio. In this case, when the external memory medium [200] is not connected to the system, the USB mode will not be selected in the mode check [20]. In order to store an external voice signal, first, when a recording key is pressed among the keys of the key input unit 50 that is connected to the microprocessor [100], the voice signal is received by the microphone [111] of FIG. 121] performs real-time compression with digital conversion of analog signals. The digitalized compressed information is processed by the microprocessor 100 to perform a storage operation on the USB memory device, which is an external storage device, through the USB HOST controller 160. In the present invention, as an example of an external storage device, a USB memory device, which is widely spread in the market, is used. This USB memory device can be seen as a general type of external storage device that can be directly connected to a USB jack of a general computer or a notebook to store data, play back, and move files.

도 3은 본 발명의 보안키 동작 플로우챠트를 나타낸 것으로 그 동작을 보면 우선 본 발명의 디지털 다중재생시스템의 전원이 완전히 OFF되어 다시 전원을 재 투입할 경우나 최초 설치 시에는 반드시 암호화 확인 기능이 작동되도록 되어 있으며 따라서 반드시 이때는 USB메모리장치를 본 시스템에 연결하여야 한다. 연결이 완료되면 USB 메모리장치내 암호화 코드를 읽고[81], 이때 이미 생산, 출하시 본디지털 멀티 미디어 재생장치내의 마이크로프로세서[100]장치 내에 저장되어있는 암호화코드와 USB 메모리장치내에 특정의 폴더에 저장되어있는 암호화 코드를 비교[83]하며 이때 암호화 코드가 일치하지 않으면 디스플레이[130]상에 "Reinput USB Memory"라고 표시[84]하며 본 시스템은 어떠한 키입력에 대해서도 아무런 작동을 하지 않게 된다. 마이크로프로세서[100]장치 내에 저장되어있는 암호화코드와 USB 메모리장치내에 특정의 폴더에 저장되어있는 암호화 코드를 비교[83]하여 암호화 코드가 일치하면 본 시스템은 정상동작[85]을 하게 된다. 단 출하시 공급된 USB 메모리장치를 분실할 수도 있으므로 이 경우는 본 발명의 시스템 출하시의 암호화정보를 등록된 분실자와의 상방 인터넷이나 기타 매체를 이용한 암호화정보 공급기능을 가져감으로서 출하시 공급된 USB 메모리장치의 분실에 대한 대비를 할 수 있다.3 is a flowchart illustrating an operation of the security key of the present invention. Referring to the operation of the present invention, first of all, the power of the digital multi-playback system of the present invention is completely turned off, and when the power is turned on again or the first time, the encryption confirmation function always operates. Therefore, a USB memory device must be connected to this system at this time. When the connection is completed, the encryption code in the USB memory device is read [81]. At this time, the encryption code stored in the microprocessor [100] device of the digital multimedia player and the specific folder in the USB memory device are read. The stored encryption codes are compared [83]. If the encryption codes do not match, "Reinput USB Memory" is displayed on the display 130 [84]. The system does not operate any key input. The encryption code stored in the microprocessor [100] device is compared with the encryption code stored in a specific folder in the USB memory device [83]. If the encryption codes match, the system operates normally. However, since the USB memory device supplied at the time of shipment may be lost, in this case, the encrypted information at the time of shipment of the system of the present invention is supplied with the encrypted information using the Internet or other media with the registered loser. You can prepare for the loss of the USB memory device.

본 발명에서 사용하는 외부 메모리장치는 일반적으로 많이 사용하고 있는 FLASH방식 메모리를 채용한 USB 모리장치로서 어디서든 쉽게 구할 수 있는 메모리 매체이며 중요한 것은 보안에 관련한 데이터는 본 발명의 시스템과 일종의 보안 표준을 준거하고 있음으로 온라인 상에서 모든 보안 Data가 등록실명자 관리를 하도록 함으로서 분실, 훼손, 도난 등에 따른 폐해를 막을 수 있는 장점이 있다.The external memory device used in the present invention is a USB memory device employing a widely used FLASH type memory, which is a memory medium that can be easily obtained from anywhere, and importantly, the data related to security is based on the system of the present invention and a kind of security standard. As a result, all security data are managed by registered real name online, which has the advantage of preventing damage caused by loss, damage, or theft.

본 발명은 대표적인 PC 주변 저장장치중의 하나인 USB 저장 매체를 이용한 다양한 디지털 오디오 미디어 재생기능 그리고 CD(콤팩트디스크)재생기능과 더불어 고가의 디지털 오디오 재생 시스템의 분실이나 도난에 대비하여 시스템내 저장된암호화 정보와 USB 저장 매체내의 암호화 정보와의 비교기능을 추가하여 도난 방지기능을 구비하였고 이동중이나 회의 혹은 급작스런 음성저장이 필요시 음성정보만을 녹취 가능토록 한 편의기능을 겸비한 멀티 디지털 오디오 미디어 재생 및 녹음 시스템 기술이다.The present invention provides a variety of digital audio media playback and CD (compact disc) playback functions using USB storage media, one of the representative PC peripheral storage devices, and encryption stored in the system in preparation for loss or theft of expensive digital audio playback systems. Multi-digital audio media playback and recording system with convenient function to prevent theft by adding information comparing with encryption information in USB storage media and to record only voice information when moving, meeting, or sudden voice storage. Technology.

Claims (2)

다중 디지털 미디어방식을 지원하는 디지털 오디오 재생 시스템에 있어서 컴퓨터 표준 외부인터페이스를 지원하는 외부저장매체를 인터페이스하기위한 호스트 콘트롤러장치와 오디오 재생미디어의 하나인 콤팩트디스크 매체와 외부의 일반적 아날로그방식 오디오신호를 디지털로 변환하기 위한 AD변환 부와 음성신호를 디지탈화하여 녹음 가능토록 하기 위한 ADPCM부와 상기한 콤팩트디스크 매체의 디지털정보를 복원하기 위한 CD형식 복원부와 상기한 다중 디지털 미디어정보를 복원하기 위한 디지털 미디어 복원부와 상기한 두 가지의 오디오신호 복원부의 신호경로를 제어하기 위한 스위칭장치, 상기한 각 기능블록들을 외부에서 제어하기 위한 키입력부, 각 기능들의 상태를 표시하기 위한 표시장치 그리고 상기한 장치들을 제어하기 위한 마이크로프로세서장치를 주요구성으로하는것을 특징으로 하는 외부 메모리 인터페이스 및 보안키 기능을 가진 다중 디지털 오디오재생 시스템In the digital audio playback system supporting multiple digital media methods, a compact disk medium, which is one of audio playback media and a host controller device for interfacing an external storage medium that supports a computer standard external interface, and an external general analog audio signal AD conversion unit for digital conversion and ADPCM unit for digital recording of audio signal, CD format restoration unit for restoring digital information of the compact disc media, and digital media for restoring the multiple digital media information. A switching device for controlling the signal paths of the restoration unit and the two audio signal restoration units, a key input unit for externally controlling the above-described functional blocks, a display unit for displaying the states of the respective functions, and the aforementioned devices. Microphone to control Multiple digital audio reproduction system with an external memory interface function and a secret key, characterized in that for the processor apparatus as an essential component 청구항 1항에 있어서 컴퓨터 표준 외부인터페이스를 지원하는 외부저장매체는 USB방식, PCMCIA, Compact Flash, MMC, IEEE1394, Bluetooth, 무선랜등을 특징으로 하는 외부 메모리 인터페이스 및 보안키 기능을 가진 다중 디지털 오디오재생 시스템The method of claim 1, wherein the external storage medium that supports a computer standard external interface is USB memory, PCMCIA, Compact Flash, MMC, IEEE1394, Bluetooth, wireless LAN, etc. Multiple digital audio playback with security key function system
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