KR950020128A - MPG / CD audio processing unit for multimedia systems - Google Patents

MPG / CD audio processing unit for multimedia systems Download PDF

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Publication number
KR950020128A
KR950020128A KR1019930028126A KR930028126A KR950020128A KR 950020128 A KR950020128 A KR 950020128A KR 1019930028126 A KR1019930028126 A KR 1019930028126A KR 930028126 A KR930028126 A KR 930028126A KR 950020128 A KR950020128 A KR 950020128A
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KR
South Korea
Prior art keywords
audio
mpeg
sampling clock
generating
mpeg audio
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KR1019930028126A
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Korean (ko)
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KR0129565B1 (en
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박우석
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이헌조
엘지전자 주식회사
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Publication of KR950020128A publication Critical patent/KR950020128A/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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439—Processing of audio elementary streams

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

본 발명은 멀티미디어 시스템에 관한 것으로, 특히 CD-ROM 저장 매체를 이용한 동화상압축 및 복원기술의 표준규격인 MPEG 1(Moving Picture Experts Group-1)기술에서 오디오 디코딩 기술과 CD-롬 인터페이스 기능, 오디오 믹싱기능을 구현하여 MPEG 오디오와 CD 오디오를 일반 퍼스널 컴퓨터(PC)의 버스 슬롯(Bus Slot)에 장착하여 동시에 플레이 할 수 있도록 한 멀티미디어 시스템의 MPEG/CD 오디오 처리 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia system. In particular, audio decoding technology, CD-ROM interface function, and audio mixing in MPEG-1 (Moving Picture Experts Group-1) technology, which is a standard of moving picture compression and restoration technology using a CD-ROM storage medium. The present invention relates to an MPEG / CD audio processing apparatus of a multimedia system that implements a function so that MPEG audio and CD audio can be simultaneously mounted on a bus slot of a general personal computer (PC).

이러한 본 발명의 목적은 CD-롬 드라이브로 부터 얻어진 MPEG 오디오 데이타를 인터페이스 하는 CD인터페이스 수단과, 상기 CD 인터페이스 수단으로 부터 얻어진 MPEG 오디오 데이타를 샘플링 클럭에 따라 원래의 PCM 데이타로 복원하는 MPEG 오디오 디코더와, 상기 MPEG 오디오 디코더로 부터 얻어진 샘플링 주파수 정보에 따라 샘플링 클럭 발생시키는 샘플링 클럭 발생수단에서 얻어진 샘플링 클럭에 따라 상기 MPEG 오디오 디코더로 부터 얻어진 PCM 오디오 데이타를 그에 상응하는 아날로그 오디오 신호로 변환하는 디지탈/아날로그 변환수단과, 사용자의 모드 선택에 따른 오디오 선택신호를 발생하는 콘트롤 로직으로 부터 얻어진 오디오 선택신호에 따라 상기 CD-롬 드라이브로 부터 얻어진 CD 오디오 및 디지탈/아날로그 변환수단에서 얻어진 MPEG 오디오를 선택 출력하는 오디오 선택수단을 구비함으로써 달성되어진다.The object of the present invention is to provide a CD interface means for interfacing MPEG audio data obtained from a CD-ROM drive, an MPEG audio decoder for restoring MPEG audio data obtained from the CD interface means to original PCM data according to a sampling clock. And digital / analog converting the PCM audio data obtained from the MPEG audio decoder into a corresponding analog audio signal according to the sampling clock obtained by the sampling clock generating means for generating the sampling clock according to the sampling frequency information obtained from the MPEG audio decoder. And the CD audio obtained from the CD-ROM drive and the MPEG audio obtained from the digital / analog converting means in accordance with the audio selecting signal obtained from the converting means and the control logic generating the audio selecting signal according to the user's mode selection. It is achieved by providing audio selecting means for tag output.

Description

멀티미디어 시스템의 엠피이지/씨디(MPEG/CD) 오디오 처리 장치MPG / CD audio processing unit for multimedia systems

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명 멀티미디어 시스템의 MPEG/CD 오디오 처리 장치 구성도.3 is a block diagram of an MPEG / CD audio processing device of the present invention multimedia system.

Claims (4)

CD-롬 드라이브로 부터 얻어진 MPEG 오디오 데이타를 인터페이스하는 CD인터페이스 수단과, 상기 CD인터페이스 수단으로 부터 얻어진 MPEG 오디오 데이타를 샘플링 클럭에 따라 원래의 PCM 데이타로 복원하는 MPEG 오디오 디코더와, 상기 MPEG 오디오 디코더로 부터 얻어진 샘플링 주파수 정보에 따라 샘플링 클럭을 발생시키는 샘플링 클럭 발생수단과, 상기 샘플링 클럭 발생수단에서 얻어진 샘플링 클럭에 따라 상기 MPEG 오디오 디코더로부터 얻어진 PCM 오디오 데이타를 그에 상응하는 아날로그 오디오 신호를 변환하는 디지탈/아날로그 변환 수단과, 사용자의 모드선택에 따른 오디오 선택신호를 발생하는 콘트롤 로직으로 부터 얻어진 오디오 선택신호에 따라 상기 CD-롬 드라이브로 부터 얻어진 CD 오디오 및 디지탈/아날로그 변환수단에서 얻어진 MPEG 오디오를 선택 출력하는 오디오 선택수단으로 구성된 것을 특징으로 한 멀티미디어 시스템의 MPEG/CD 오디오 처리장치.CD interface means for interfacing MPEG audio data obtained from a CD-ROM drive, MPEG audio decoder for restoring MPEG audio data obtained from the CD interface means to original PCM data according to a sampling clock, and the MPEG audio decoder. Sampling clock generating means for generating a sampling clock in accordance with the sampling frequency information obtained from the digital signal; CD audio obtained from the CD-ROM drive and MPEG audio obtained from digital / analog converting means in accordance with the analog converting means and the audio select signal obtained from the control logic generating an audio select signal according to the user's mode selection. MPEG / CD audio processing apparatus of the multimedia system, characterized in that consisting of audio selection means for outputting the selection. 제1항에 있어서, 샘플링 클럭 발생수단은 상기 MPEG 오디오 디코더로 부터 출력된 주파수 정보(FSø,FS1)가 (ø, ø)이면 44.1KHz, (ø, 1)이면 48KHz, (1, ø)이면 32KHz, (1, 1)이면 점유된 클럭을 샘플링 클럭으로 발생함을 특징으로 한 멀티미디어 시스템 MPEG/CD 오디오장치.The sampling clock generating means according to claim 1, wherein the sampling clock generating means is 44.1 KHz if the frequency information (FS ?, FS1) output from the MPEG audio decoder is (? 32 KHz, (1, 1) Multimedia system MPEG / CD audio device characterized in that the occupied clock is generated as a sampling clock. 제1항에 있어서, 콘트롤 로직은 사용자의 선택모드가 CD오디오이면 고전위를 MPEG 오디오이면 저전위의 오디오 선택신호를 발생함을 특징으로 한 멀티미디어 시스템의 MPEG/CD 오디오 처리장치.The MPEG / CD audio processing apparatus of claim 1, wherein the control logic generates a low-potential audio selection signal when the user's selection mode is CD audio. 제1항에 있어서, 오디어 선택수단은 멀티플렉서인 것을 특징으로 한 멀티미디어 시스템의 MPEG/CD 오디오 처리장치.2. An MPEG / CD audio processing apparatus according to claim 1, wherein the audio selecting means is a multiplexer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930028126A 1993-12-16 1993-12-16 Mpeg/cd audio processing apparatus in multimedia system KR0129565B1 (en)

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KR1019930028126A KR0129565B1 (en) 1993-12-16 1993-12-16 Mpeg/cd audio processing apparatus in multimedia system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100357090B1 (en) * 1995-10-16 2003-01-15 엘지전자 주식회사 Player for audio different in frequency
KR100568110B1 (en) * 1999-02-08 2006-04-05 이용철 A compact disk player with an MP3 module and its control method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100724204B1 (en) * 2001-05-16 2007-05-31 엘지전자 주식회사 Apparatus for reproducing a data on recorded optical disc

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100357090B1 (en) * 1995-10-16 2003-01-15 엘지전자 주식회사 Player for audio different in frequency
KR100568110B1 (en) * 1999-02-08 2006-04-05 이용철 A compact disk player with an MP3 module and its control method

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