The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1991
Filed:
Sep. 18, 1987
Yacov Pshtissky, Bayside, NY (US);
Shiyang Gao, Uniondale, NY (US);
Vicon Industries, Inc., Melville, NY (US);
Abstract
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.