发明公开
EP0242215A2 Apparatus for data recording disc playback
失效
gerätzur Wiedergabe einer Datenaufzeichnungsplatte。
- 专利标题： Apparatus for data recording disc playback
- 专利标题（中）： gerätzur Wiedergabe einer Datenaufzeichnungsplatte。
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申请号： EP87303360.9申请日： 1987-04-15
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公开(公告)号： EP0242215A2公开(公告)日： 1987-10-21
- 发明人: Yoshida, Masayuki , Ueda, Izumi , Ishii, Hidehiro , Shiba, Takahumi , Nakajima, Fumihiro
- 申请人： PIONEER ELECTRONIC CORPORATION
- 申请人地址： No. 4-1, Meguro 1-chome Meguro-ku Tokyo 153 JP
- 专利权人： PIONEER ELECTRONIC CORPORATION
- 当前专利权人： PIONEER ELECTRONIC CORPORATION
- 当前专利权人地址： No. 4-1, Meguro 1-chome Meguro-ku Tokyo 153 JP
- 代理机构： Sturt, Clifford Mark
- 优先权： JP86711/86 19860415; JP86712/86 19860415; JP86713/86 19860415; JP86714/86 19860415; JP86715/86 19860415; JP86716/86 19860415; JP86719/86 19860415; JP86722/86 19860415
- 主分类号： G11B7/00
- IPC分类号： G11B7/00 ; G11B20/00 ; G11B19/28 ; G11B20/10 ; G11B7/08 ; G11B27/10 ; H04N5/93 ; H04N9/87
摘要：
A method and apparatus for playback of a data recording disc which contains a CD area in which a signal such as an audio signal is recorded in digital form and a video area in which a FM-modulated video signal is recorded with a digital audio signal superimposed thereon. The position of a data detection point of a pickup is monitored, and the equalization and amplifier gain of components of a digital demodulation system are automatically changed in accordance with playback being executed of the CD area or the video area, so that a single demodulation system is used for woth digital signals from the CD area and digital signals from the video area. In addition, the frequency characteristics of components in servo systems which control the spindle motor, pickup carriage, etc. of the apparatus are automatically changed over for CD area and video area playback respectively, to provide stable servo control in spite of the high speed of rotation during video data playback.
公开/授权文献
- EP0242215B1 Apparatus for data recording disc playback 公开/授权日：1994-08-24
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