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:
Sep. 09, 1986
Filed:
Jun. 15, 1983
Kouichi Igata, Hirakata, JP;
Masaaki Kobayashi, Kawanishi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A video tape recorder has a simple helical-scan construction capable of variable-speed reproduction free from noise bars on reproduced images at desired speeds ranging from a normal speed in reverse reproduction to threefold normal speed in forward reproduction. The video tape recorder comprises a magnetic tape drive mechanism including a capstan motor and a pinch roller for driving a magnetic tape, a control circuit for moving the magnetic tape at constant speeds including a normal speed, a twofold speed, a threefold speed in forward reproduction and a normal speed in reverse reproduction, and for keeping the magnetic tape stationary, a speed setting circuit for setting any one of the foregoing speeds as a tape running speed, a control signal reproducing circuit for reproducing control signals recorded on the magnetic tape at one-frame intervals, a control signal selection circuit for selecting a control signal dependent on a speed setting from the reproduced control signals, a time setting circuit for varying a time setting starting from a control signal selected by the control signal selection means, and a speed changing circuit for changing the normal speed in reverse reproduction, the stationary, the normal speed, the twofold normal speed, and the threefold normal speed in a time interval of a few frames.