发明授权
- 专利标题: Scan tracking apparatus for helical scan video tape recorder
- 专利标题(中): 用于螺旋扫描录像机的扫描跟踪装置
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申请号: US470667申请日: 1983-02-28
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公开(公告)号: US4520410A公开(公告)日: 1985-05-28
- 发明人: Toru Sekiguchi , Isao Sanguu
- 申请人: Toru Sekiguchi , Isao Sanguu
- 申请人地址: JPX Tokyo
- 专利权人: Nippon Electric Co., Ltd.
- 当前专利权人: Nippon Electric Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX57-30314 19820226
- 主分类号: H04N5/783
- IPC分类号: H04N5/783 ; G05D3/12 ; G11B5/584 ; G11B5/588 ; H04N5/7826 ; G11B5/58
摘要:
A scan tracking apparatus for a helical scan tape recorder, comprising a movable tape head (11), a detector (13) detecting the envelope of the tape signal to produce a reproduced signal, sampling means (15) for sampling the reproduced signal at fixed points of the helical scan, memory (17) for storing the reproduced signal and correction signals from different tracks of the helical scan, computation means (2) for computing a correction signal to return the tape head to the center of the track, a sawtooth generator (2, 4) for producing a signal related to the tape speed (v), and a head driving mechanism (9) for moving the tape head in response to the sawtooth and correction signals.