发明名称 |
READING A DISC-SHAPED RECORD CARRIER |
摘要 |
An apparatus for reading a disc-shaped record carrier on which signals are recorded in parallel tracks in optically coded form. The signal is read with the aid of a beam of radiation, which after interaction with the record carrier impinges on two detectors offset with respect to each other in a direction parallel to the image of the track direction of the record carrier. A first combination circuit supplies the difference of the output signals of said read detectors to a first signal processing channel, which processes the part of comparatively high frequency of the frequency spectrum of the recorded signal. A second combination signal supplies the sum of the output signals of said read detectors to a second processing channel, which processes the part of comparatively low frequency of the frequency spectrum of the recorded signal. |
申请公布号 |
AU499190(B2) |
申请公布日期 |
1979.04.05 |
申请号 |
AU19750085486 |
申请日期 |
1975.10.07 |
申请人 |
PHILIPS' GLOEILAMPENFABRIEKEN, N.V. |
发明人 |
M.R. DE HAAN |
分类号 |
H04N5/92;G02B27/00;G11B7/00;G11B7/005;G11B7/013;G11B7/09;G11B7/13;H04N9/835;(IPC1-7):G11B7/12;G11B11/18 |
主分类号 |
H04N5/92 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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