发明名称 |
APPARATUS FOR PRODUCING A PHASE-SYNCHRONIZED REFERENCE SIGNAL IN A VIDEO SIGNAL REPRODUCING SYSTEM |
摘要 |
<p>APPARATUS FOR PRODUCING A PHASE-SYNCHRONIZED REFERENCE SIGNAL IN A VIDEO SIGNAL REPRODUCING SYSTEM Apparatus is disclosed for use in a video signal reproducing system of the type having first and second rotary reproducing transducers for reproducing video and vertical synchronizing signals from record tracks on a record medium, in which the transducers exhibit a predetermined angular separation therebetween, the video signal reproducing system also having means for producing a reference synchronizing signal in phase synchronism with the vertical synchronizing signal reproduced by the first transducer. The apparatus is adapted to produce a substantially phase synchronized reference signal regardless of the particular transducer which is used to reproduce the video signals. The apparatus comprises a delay circuit for delaying the reference synchronizing signal by an amount corresponding to the predetermined angular separation between the transducers; and a switching circuit supplied with this delayed as well as the undelayed reference synchronizing signal. A switch control circuit supplies a switch control signal to the switching circuit to determine whether the delayed or undelayed reference synchronizing signal should be selected, the switch control circuit including a detector for detecting the phase relationship between the vertical synchronizing signal which then is being reproduced and the reference synchronizing signal.</p> |
申请公布号 |
CA1150822(A) |
申请公布日期 |
1983.07.26 |
申请号 |
CA19800356035 |
申请日期 |
1980.07.11 |
申请人 |
SONY CORPORATION |
发明人 |
TANAKA, SHOSUKE;TATAMI, MITSUSHIGE |
分类号 |
H04N5/783;H04N5/95;(IPC1-7):H04N5/93 |
主分类号 |
H04N5/783 |
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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