公开(公告)号：US3783188A

公开(公告)日：1974-01-01

申请号：US3783188D

申请日：1972-04-17

Applicant: RCA CORP

Inventor： HURFORD W

IPC: H04N5/262 ,  H04N5/265 ,  H04N5/22

CPC classification number: H04N5/265

Abstract: Fade-to-black video signal processing apparatus, used to fade picture portions of a video signal provided from a source not synchronized to available studio sync, employs an analog multiplier as a fader element. Apparatus to regenerate horizontal and vertical blanking interval pulses, arranged for synchronization with the video signal, is used to place the analog multiplier into full gain condition during the horizontal and vertical blanking intervals of the video signal.

Abstract translation: 用于淡化从不同步到可用演播室同步的源提供的视频信号的图像部分的渐变到黑色视频信号处理装置使用模拟乘法器作为推子元件。 用于再生与视频信号同步的水平和垂直消隐间隔脉冲的装置用于在视频信号的水平和垂直消隐间隔期间将模拟乘法器置于完全增益状态。

公开(公告)号：US3855419A

公开(公告)日：1974-12-17

申请号：US39043373

申请日：1973-08-22

Applicant: RCA CORP

Inventor： HURFORD W

IPC: G08C15/12 ,  H04J7/00

CPC classification number: H04J7/00 ,  G08C15/12

Abstract: There is disclosed a multiplex system for use in a large studio complex. The system employs a modulator for providing at an output a pulse width modulated waveshape indicative of the status of a control function. A plurality of such pulse width modulated waveshapes are multiplexed and transmitted via a common cable to a remote location where the signals are demultiplexed and then time stretched in order to obtain a control voltage of a magnitude corresponding with the status of the control functions.

Abstract translation: 公开了一种用于大型演播室复合体的多路复用系统。 该系统采用调制器，用于在输出端提供指示控制功能的状态的脉宽调制波形。 多个这样的脉冲宽度调制波形被多路复用并通过公共电缆传输到信号被解复用的远程位置，然后被时间延长以获得与控制功能的状态对应的大小的控制电压。