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:
May. 14, 1991
Filed:
Dec. 19, 1989
Klaus-Dieter Muller, Weiterstadt, DE;
Ernst Rau, Zwingenberg, DE;
Christian Sacher, Darmstadt-Eberstadt, DE;
BTS Broadcast Television Systems GmbH, Darmstadt, DE;
Abstract
In a mixer in which several video signal inputs are multiplied by respective mixing factor signals and the multiplier outputs are added together to produce an output video signal, one of the video inputs is given priority and the mixing factors for the other video inputs are premultiplied by a second set of multipliers in such a manner that the video input of next priority will not have an amplitude greater than what is 'left over' by the higher priority signal, and so on in descending order of priority. For further flexibility it is useful to provide a third set of multipliers to allow more external control inputs to participate in determining mixing factors and facilitate special effects. A multiplier of the third set is not necessary for control of the mixing factor of the video input of lowest priority. Even a multiplier of the second set is not strictly necessary for that lowest priority video input.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile