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. 30, 1991
Filed:
Oct. 19, 1990
Felix Aschwanden, Thalwil, CH;
RCA Licensing Corporation, Princeton, NJ (US);
Abstract
Video signal time scaling apparatus includes a gated oscillator enabled and disabled in synchronism with a line scanning rate and capable of generating an oscillatory signal which is other than a multiple of a line scanning rate. The phase of an oscillator output signal is compared to the phase of a reference signal a predetermined time after the oscillator is enabled. Phase coincidence indicates a correct oscillation frequency. Otherwise, the oscillator frequency is incremented or decremented until phase coincidence is achieved. The oscillator signal acts a READ clock for permitting a video signal to be read out of a line memory at a rate different than that at which the video signal was written into memory, thereby producing a time scaled output video signal.