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1. 发明授权

US3636252A Servo for video tape apparatus with editing capabilities 失效
标题翻译：具有编辑能力的视频带设备服务器
公开(公告)号：US3636252A
公开(公告)日：1972-01-18
申请号：US3636252D
申请日：1969-02-17
申请人： AMPEX
发明人： KOWAL LEONARD
IPC分类号： H04N5/7826 , G05D13/62 , G11B15/467 , G11B27/02 , G11B27/024 , G11B27/11 , G11B15/52 , G11B23/42
CPC分类号： G11B27/024
摘要： A system for a video tape recorder produces reliable video tape assemble edits with no significant time base error by employing digital techniques in the phase control of the head drum and capstan servos.

2. 发明授权

US3484548A Control apparatus for program distribution of broadcast and recorded video information 失效
标题翻译：用于程序分发广播和记录的视频信息的控制装置
公开(公告)号：US3484548A
公开(公告)日：1969-12-16
申请号：US3484548D
申请日：1966-09-16
申请人： AMPEX
发明人： KOWAL LEONARD , STARAI RUDOLPH
IPC分类号： H04N5/445 , H04N5/765 , H04N7/02
CPC分类号： H04N5/445 , H04N5/765

3. 发明专利

CA888426A SERVO FOR VIDEO TAPE APPARATUS WITH EDITING CAPABILITIES 未知
公开(公告)号：CA888426A
公开(公告)日：1971-12-14
申请号：CA888426D
申请人： AMPEX
发明人： KOWAL LEONARD

4. 发明专利

HK47888A COLOR CORRECTOR FOR A COMPOSITE COLOR VIDEO SIGNAL 未知
公开(公告)号：HK47888A
公开(公告)日：1988-07-08
申请号：HK47888
申请日：1988-06-30
申请人： AMPEX
发明人： KOWAL LEONARD
IPC分类号： H04N9/455 , H04N9/87 , H04N9/83 , H04N9/89 , H04N5/95 , H04N9/38
摘要： An improved color corrector is disclosed which is of the type that separates the color burst component from a color video signal and uses the color burst in a phase locked loop to generate a continuous color subcarrier signal that is used to provide frequency and phase error correction of the chroma component of the color video signal. The corrector uses a wide bandwidth phase locked loop and has means for adding a color corrected chroma component from a present horizontal line of the video signal to a color corrected chroma component delayed by one horizontal line to cancel other circuit induced phase errors that are present due to the use of the wide bandwidth phase locked loop and the gating of the color burst thereto using a horizontal sync related burst gate signal.

5. 发明专利

DE1462427A1 未知
公开(公告)号：DE1462427A1
公开(公告)日：1969-01-02
申请号：DE1462427
申请日：1966-06-23
申请人： AMPEX
发明人： F BOYLAN WILLIAM , KOWAL LEONARD
IPC分类号： H04N5/94
摘要： 1,156,053. Television recording. AMPEX CORP. 21 June, 1966 [23 June, 1965], No. 27747/66. Heading H4F. A frequency modulated television signal 32 obtained from a magnetic tape reproducing apparatus 10 contains " drop-out " portions 32b comprising only noise which is produced during the movement D when the rotating magnetic head 20 is out of engagement with the ape. After subsequent amplification and limitation of the signal in stages 34, 36 and 40, the noise 42b acquires a substantial amplitude such that, in the outut of the F.M. detector 44, the " drop-out " signals 46b have sufficiently large negative excursions to cause disturbance of the proper picture synchronization. In a typical reproducing apparatus the " drop-out " signals occur once in each field and by appropriate phasing are arranged to appear just before the vertical synchronizing interval. In accordance with the invention, in magnetic tapereproducing apparatus, the " drop-out " signals are eliminated by an arrangement in which the frequency modulated signal 38, prior to passage through the main limiters 40, is amplitude demodulated in a detector 50 to derive positivegoing pulses 64a during the " drop-out " intervals. These pulses are then applied to trigger on clamp stage 78 connected to the output of an amplifier 66 through which the signal passes from detector 44. The action of the clamp is to bring the " drop-out " intervals to a reference potential (earth as illustrated) so that no interference with synchronization occurs. The absolute level of the signal from amplifier 66 is made adjustable by means of resistor 70 in the emitter connection. The level is selected so that the " drop-out " interval corresponds to a grey level, i.e. a level in the direction from black opposite to that of the synchronizing signals.

6. 发明专利

CA1138098A COLOR CORRECTOR FOR A COMPOSITE COLOR VIDEO SIGNAL 未知
公开(公告)号：CA1138098A
公开(公告)日：1982-12-21
申请号：CA348569
申请日：1980-03-27
申请人： AMPEX
发明人： KOWAL LEONARD
IPC分类号： H04N9/83 , H04N9/455 , H04N9/87 , H04N9/89 , H04N9/46
摘要： An improved color corrector is disclosed which is of the type that separates the color burst component from a color video signal and uses the color burst in a phase locked loop to generate a continuous color subcarrier signal that is used to provide frequency and phase error correction of the chroma component of the color video signal. The corrector uses a wide bandwidth phase locked loop and has means for adding a color corrected chroma component from a present horizontal line of the video signal to a color corrected chroma component delayed by one horizontal line to cancel other circuit induced phase errors that are present due to the use of the wide bandwidth phase locked loop and the gating of the color burst thereto using a horizontal sync related burst gate signal.

7. 发明专利

DE3013509A1 未知
公开(公告)号：DE3013509A1
公开(公告)日：1980-10-16
申请号：DE3013509
申请日：1980-04-08
申请人： AMPEX
发明人： KOWAL LEONARD
IPC分类号： H04N9/83 , H04N9/455 , H04N9/87 , H04N9/89 , H04N9/491
摘要： An improved color corrector is disclosed which is of the type that separates the color burst component from a color video signal and uses the color burst in a phase locked loop to generate a continuous color subcarrier signal that is used to provide frequency and phase error correction of the chroma component of the color video signal. The corrector uses a wide bandwidth phase locked loop and has means for adding a color corrected chroma component from a present horizontal line of the video signal to a color corrected chroma component delayed by one horizontal line to cancel other circuit induced phase errors that are present due to the use of the wide bandwidth phase locked loop and the gating of the color burst thereto using a horizontal sync related burst gate signal.

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