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. 02, 1986
Filed:
Aug. 24, 1983
Kazuo Yamagiwa, Tokyo, JP;
Kiyoshi Nishitani, Fujisawa, JP;
Koichi Takeuchi, Kamakura, JP;
Seiji Sato, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
A video signal recording apparatus of reduced size for portability combines a video camera and helical scan video tape recorder in a single unit, in which the reduced size is obtained in part by having a tape guide drum of reduced diameter, which requires a tape wrap angle greater than the conventional 180.degree. and employs a pair of rotary tape heads that are arranged close together relative to the diametrically opposed conventional head arrangement. The timing of the heads in recording the fields of the video signals as tracks is controlled by a vertical synchronization signal having pulses that are delayed to account for the finite distance between the two rotary heads. The vertical sync signal then has a different time period for a first field than it does for a second field of one frame of the video signal. The camera has an image pickup portion that is caused to be scanned by the same synchronization signals utilized in the recording operation. This permits any horizontal overscan to occur at a time when the heads are off the tape and by adjusting the time base of the vertical sync signal the overscan can be arranged so that the portion of it is above and below the effective portion of the image pickup portion of the camera.