发明名称 |
MEANS FOR COMPATIBLY REPRODUCING VIDEO DISCS RECORDED ACCORDING TO DIFFERENT BROADCAST STANDARDS |
摘要 |
<p>A rotary recording medium reproducing apparatus reproduces a recorded signal from a rotary recording medium by use of a reproducing element. The rotary recording medium is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frequency. The reproducing apparatus comprises a motor for rotating the rotary recording medium, a reference signal generating circuit for generating a reference signal having a frequency equal to a horizontal scanning frequency of a video signal of a standard television system which is characteristic of the reproducing apparatus and should originally be reproduced, or equal to 1/M (M is an integer) times the above horizontal scanning frequency, detecting circuit for detecting a signal respective of the rotational speed of the rotary recording medium, and a comparator for comparing the reference signal and the signal respective of the rotational speed of the rotary recording medium, to control the rotational speed of the rotary recording medium by a compared output signal thus obtained, so that the synchronizing signal within the reproduced signal is reproduced at a frequency equal to the horizontal scanning frequency of the above standard television system with which the reproduction should originally be performed.</p> |
申请公布号 |
CA1158358(A) |
申请公布日期 |
1983.12.06 |
申请号 |
CA19810377211 |
申请日期 |
1981.05.08 |
申请人 |
VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
MACHIDA, TOYOTAKA;AOIKE, HITOSHI;KUMAZAKI, TOSHIMASA;WATANABE, YASUAKI;IKEMURA, YUICHI |
分类号 |
H04N5/903;G11B19/28;H04N5/76;H04N9/80;H04N9/85;H04N9/89;(IPC1-7):H04N5/76 |
主分类号 |
H04N5/903 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|