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:
Jul. 01, 1980
Filed:
May. 24, 1978
Jurgen Heitmann, Seeheim, DE;
Rudolf Wilhelm, Klein-Gerau, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A head wheel is rotated at a predetermined, essentially constant speed within a tape cylinder over which a tape is guided in a spiral path, on which video signal tracks are recorded in inclined track portions. The instantaneous position of the head wheel is determined, for example by a tacho generator applying signals to a counter, phase-synchronized by the outputs from the head wheel tacho generator. The instantaneous position of the tape is determined, for example from sensing the cross modulation of signals derived from the head as the head crosses from one track portion to another, or by sensing the phase jump of the pulse sequence of the horizontal synchronization signals; the two position signals are combined in a logic stage so that a line address can be derived of a signal transduced at any one instant by said head from an incremental area of the tape, the signal being associated with the line address for storage, for example in a memory for subsequent re-recording or reproduction at a time relation (slow motion or fast motion) differing from the original recording speed.