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1. 发明公开

EP0720157A3 Video compact disc drive 失效
标题翻译： Antriebsgerätfür视频光盘
公开(公告)号：EP0720157A3
公开(公告)日：1997-03-26
申请号：EP95120681.2
申请日：1995-12-28
申请人： Mitsumi Electric Company Ltd.
发明人： Sugie,Noburu c/oAlpha Peripherals , Tanaka, Akio c/o Mitsumi Electric Co.,Ltd.
IPC分类号： G11B7/00 , G11B19/02
CPC分类号： G11B19/02 , G09B5/065 , G11B7/0037 , H04N5/765 , H04N5/781 , H04N5/9264 , H04N5/93
摘要： An improved video disc drive which is capable of reproducing a motion picture from a compact disc as well as conventional applications including a digital audio and a computer data base is disclosed. The video disc drive includes an optical unit for providing an optical beam to a surface of a compact disc to sense a reflected optical beam indicative of pits on said compact disc and generating an electric signal corresponding to the sensed optical beam, a servo controller for controlling a rotation of the compact disc and positioning the optical unit on the surface of the compact disc, an amplifier for amplifying the electric signal from the optical unit to an amplitude greater than a predetermined level, a digital signal processor for demodulating the electric signal from the amplifier to reproduce digital data and error-correcting the digital data, a CD-ROM decoder for decoding the digital data from the digital signal processor and providing the decoded digital data to a host computer or other external device through a CD-ROM standard interface bus, an MPEG decoder for separating the video data from audio data from motion picture data from the digital signal processor and decoding the video data and the audio data based on a predetermined protocol and outputting the decoded video and audio data to an external monitor, and a micro-computer for controlling an overall operation of the disc drive based on the instruction from the host computer or other external device by controlling the servo controller, the CD-ROM decoder and the MPEG decoder.
摘要翻译：公开了能够从光盘再现运动图像的改进的视盘驱动器以及包括数字音频和计算机数据库的传统应用。视盘驱动器包括光学单元，用于向光盘的表面提供光束以感测指示所述光盘上的凹坑的反射光束并产生对应于所感测的光束的电信号，用于控制的伺服控制器光盘的旋转并将光学单元定位在光盘的表面上，放大器，用于将来自光学单元的电信号放大到大于预定电平的幅度;数字信号处理器，用于解调来自光盘的电信号用于再现数字数据和纠错数字数据的CD-ROM解码器，用于从数字信号处理器解码数字数据并通过CD-ROM标准接口总线将解码的数字数据提供给主计算机或其他外部设备 MPEG解码器，用于从视频数据与来自数字信号处理器的运动图像数据和音频数据分离解码基于预定协议的视频数据和音频数据，并将解码的视频和音频数据输出到外部监视器，以及微计算机，用于基于来自主计算机或其他外部的指令控制盘驱动器的整体操作设备通过控制伺服控制器，CD-ROM解码器和MPEG解码器。

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