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:
Mar. 17, 1981
Filed:
Apr. 05, 1979
Mitsushige Tatami, Ebina, JP;
Sony Corporation, Tokyo, JP;
Abstract
A quasi-vertical synchronizing signal generator is disclosed, for use with a helical scan video tape recorder (VTR) to generate a quasi-vertical synchronizing signal during a special video effects reproducing operation, which signal occurs at the same relative location during the scanning trace of the reproducing head even if the effective length of that trace varies in accordance with the special video effects then in operation. A signal is produced when the head reaches a pre-established location in the track which it is scanning, and then a delayed signal, which is delayed from the time that the head reached the pre-established location, is generated, this delayed time being selectable as a function of the particular special video effect which has been selected for operation. The delayed signal constitutes the quasi-vertical synchronizing signal. If the selected special video effect results in a longer-than-normal effective length of the scanning trace, then the quasi-vertical synchronizing signal is produced with a greater delay than if the selected special video effect results in a scanning trace of smaller-than-normal effective length.