Vicon Industries, Inc.

Other

Yacov A Pshtissky

Shiyang Gao

Donald N Horn

Shi-Yang Gao

John Skidmore

A system for encoding selected signal position information from a plurality of video signal sources onto the video signals and for selecting a predetermined one of the signals for display by decoding the encoded information. The encoding portion encodes input signal position information in serial pulse form on the back porch of the respective video signal. An alphanumeric character may also be mixed into the encoded signal. A single output line provides, in sequence, the encoded video signal of each input position. The encoding portion also changes each input video signal to a zero blanking level. The encoded output signal may either be supplied directly to the decoding portion or may be recorded and played back into the decoder. The decoding portion selects a particular signal for display by decoding the encoded information and comparing it to a preset number. When this comparison indicates equality, a gating signal is provided which releases digitally stored video information related to that position to an output digital to analog converter. The output of the converter is supplied to a video monitor.

Encoding and decoding of multiple video sources

Apparatus for encoding identification information onto video signals provided by a plurality of video signal sources (cameras) comprises a switching arrangement for supplying, in sequence, a plurality of independent video signals, each from one of the video sources. An A/D converter converts signal components associated with single field intervals to digital representations and the digital representations are stored in digital memory banks. The memory banks can be divided into two separate halves, each capable of storing a single field of video signals. The memory banks are enabled by a head switching (frame rate) signal from an associated VCR so as to alternately store a single field of video in one half while reading out twice in succession from the other half video signals stored during a preceding frame interval. An encoder adds identification information to the video signals which are read out so as to distinguish those signals from the signals provided from other video sources.

Apparatus and method for encoding identification information for

A system for distributing a master synchronization signal to several cameras in a CCTV system. The master synchronization signal is distributed on the same coaxial cable over which the video from the cameras is transmitted. The video sync from one camera, designated the master camera is distributed to the remaining cameras, designated the slave cameras. The level of the master sync signal is altered from normal sync level so that it may be detected and reconstructed at the camera by a video sync detector.

Central station synchronization system

A bi-directional amplifier for use in closed circuit television systems. The bi-directional amplifier permits the amplification of video signals received from a remote camera and camera control signals received from a control panel. The control signals and video signals are placed on opposite ends of a single link conductor such as a coaxial cable or twisted pair connecting the console and camera. The control signals are transmitted during the vertical back porch period of the video signal. The bi-directional amplifier can be placed in the middle of long runs of the single link to permit balanced or unbalanced transmissions of closed circuit television signals and accompanying control signals over lengths of cable which ordinarily require amplification of the signals to compensate for signal attenuation.

Bi-directional amplifier for control and video signals in a closed

A modular video switching system for switching a video signal from one of many video cameras to a video monitor. The system includes one or more individual modules each containing a limited set of input channels. The modules can be cascaded with each other to permit scanning of the video signals from all modules on to a single video monitor. Also provision is made for modular camera controls, requiring only a single control for all cameras, using modular circuitry to rout the control signals to the appropriate camera.

Modular video control system

An autofocus system and method for automatically adjusting the focus of a lens system. The autofocus system selects video signals, having a frequency in a preselected range and drives the lens system until the voltage of the frequencies in the preselected range is maximized. The preselected frequency range has been found to be to 0.8 Mhz to 1 Mhz.

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Bayside, NY, United States of America

Yacov A Pshtissky