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:
Jan. 26, 1988
Filed:
Nov. 25, 1986
Fumitaka Miyamoto, Yachiyo, JP;
Kenji Kaneko, Iwai, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A video signal discriminating apparatus comprises a pulse width measuring part for measuring a pulse width of a vertical or horizontal synchronizing pulse within a composite synchronizing signal of a video signal, a period measuring part for measuring a period of the synchronizing pulse having the pulse width thereof measured in the pulse width measuring part, and a discriminating part for discriminating that the video signal exists when the measured pulse width and the measured period are within respective predetermined ranges and for discriminating that no video signal exists when the measured pulse width and the measured period are outside the respective predetermined ranges.