公开(公告)号：US3692918A

公开(公告)日：1972-09-19

申请号：US3692918D

申请日：1971-05-17

Applicant: RCA CORP

Inventor： OLSON CHARLES LANGDON ,  DISCHERT ROBERT ADAMS

IPC: H04N9/093 ,  H04N9/08

CPC classification number: H04N9/093

Abstract: Predominantly positive and negative polarity waves formed from edge video signals, representing sharp transitions between light and dark areas of a subject and derived from two of a plurality of pickup tubes respectively responsive to different component colors of the subject, are peak detected to produce a signal having such polarity and amplitude as to so control the beam deflection in one of the tubes that the edge video signals are made to coincide in time.

Abstract translation: 由边缘视频信号形成的主要的正极性和负极性波，代表被摄体的光和暗区域之间的尖锐过渡，并且分别响应于对象的不同分量颜色导出的多个拾取管中的两个，以检测出峰值以产生信号 具有这样的极性和振幅，从而控制一个管中的光束偏转使得边缘视频信号在时间上一致。

公开(公告)号：AU4232172A

公开(公告)日：1973-11-22

申请号：AU4232172

申请日：1972-05-16

Applicant: RCA CORP

Inventor： OLSON CHARLES LANGDON ,  DISCHERT ROBERT ADAMS

IPC: H04N9/093 ,  H04N9/08

Abstract: Predominantly positive and negative polarity waves formed from edge video signals, representing sharp transitions between light and dark areas of a subject and derived from two of a plurality of pickup tubes respectively responsive to different component colors of the subject, are peak detected to produce a signal having such polarity and amplitude as to so control the beam deflection in one of the tubes that the edge video signals are made to coincide in time.

公开(公告)号：DE3339290A1

公开(公告)日：1984-05-03

申请号：DE3339290

申请日：1983-10-28

Applicant: RCA CORP

Inventor： OLSON CHARLES LANGDON ,  MONAHAN JOHN FRANCIS

IPC: H04N5/18

Abstract: A black-level clamp for a signal derived from a transducer such as a camera tube includes a controllable voltage offset generator such as a series capacitor or an amplifier. The television signal is sampled during the horizontal sync interval to produce a control signal indicative of the current black-level signal, and the control signal is applied to adjust the charge on the series capacitor to place one plate at a reference voltage or is compared with a reference level to produce a further control signal for adjusting the offset of the amplifier. In either case, drift of the reference voltage which may perturb the operation of the clamp is reduced by deriving the reference voltage from the television signal at times within the vertical blanking interval.

公开(公告)号：FR2535566A1

公开(公告)日：1984-05-04

申请号：FR8317342

申请日：1983-10-28

Applicant: RCA CORP

Inventor： OLSON CHARLES LANGDON ,  MONAHAN JOHN FRANCIS

IPC: H04N5/18 ,  H04N9/535

Abstract: A black-level clamp for a signal derived from a transducer such as a camera tube includes a controllable voltage offset generator such as a series capacitor or an amplifier. The television signal is sampled during the horizontal sync interval to produce a control signal indicative of the current black-level signal, and the control signal is applied to adjust the charge on the series capacitor to place one plate at a reference voltage or is compared with a reference level to produce a further control signal for adjusting the offset of the amplifier. In either case, drift of the reference voltage which may perturb the operation of the clamp is reduced by deriving the reference voltage from the television signal at times within the vertical blanking interval.

公开(公告)号：DE3010978A1

公开(公告)日：1980-10-02

申请号：DE3010978

申请日：1980-03-21

Applicant: RCA CORP

Inventor： OLSON CHARLES LANGDON ,  HACKE JOSEPH FRANCIS

IPC: H04N5/228 ,  H04N5/21

Abstract: In a television camera having an electron scanning beam stabilizer circuit, a circuit for improved handling of highlights comprises means for forming an electrical signal corresponding to a pickup tube image highlight, limiting the magnitude of said signal to a predetermined level and utilizing that signal to form a highlight handling signal which causes the increase in beam scanning current necessary to discharge said highlight. In a color camera, the output from one pickup tube can be used to derive the signals necessary to control all three tubes simultaneously. A modified beam stabilizer circuit comprises means for allowing the beam current to increase without reduction by the beam stabilizer in order to discharge the highlight. A complementary signal derived from the highlight handling signal is applied to the modified beam stabilizer simultaneously with the highlight handling signal in order to neutralize the beam stabilizer.