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公开(公告)号：EP0174666A3
公开(公告)日：1987-08-05
申请号：EP85111627
申请日：1985-09-13
CPC分类号： G11B19/02 , G11B20/10527 , G11B27/36 , G11B33/10 , G11B2220/2545 , H04N9/802 , H04N9/8355
摘要： A recording disk playback apparatus capable of playback of recording disks having digitized audio data recorded thereon, (CDs), disks having digitized audio data together with audio and video data recorded by frequency modulation recorded thereon (LDDs), and disks having only video and audio data recorded by frequency modulation thereon, (LDs) is provided with means for discriminating the type of disk which is to be played and for producing signals indicating the disk type, for switching control purposes. The discrimination means will reliably distinguish between LDs and LDDs, even if these are of identical size.
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公开(公告)号：EP0175308A3
公开(公告)日：1987-08-12
申请号：EP85111628
申请日：1985-09-13
IPC分类号： G11B07/00
CPC分类号： G11B20/10 , G11B7/005 , G11B19/28 , G11B20/10527 , G11B20/225 , H04N5/7605 , H04N5/95 , H04N9/802 , H04N9/835
摘要： A recording disk playback apparatus which is compatible with playback of both compact audio disks (CDs), having only a digitized audio signal recorded thereon, and recording disks having video and audio signals recorded by frequency modulation thereon together with a superimposed digitized audio signal (LDDs), includes means whereby a read-out clock signal which reads out temporarily stored digitized audio data from a memory is held fixed in frequency when a CD is being played, with closed- loop control of the speed of a CD drive motor being also executed, to thereby eliminate jitter in the demodulated audio signal, while during playing of a LDD the read-out clock signal is phase-locked with a playback clock signal. 1
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