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:
Dec. 28, 1993
Filed:
Mar. 05, 1993
Hiroshi Kayashima, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A video signal processor for reproducing a MUSE signal in the form of a Hi-vision signal. In transmitting a Hi-vision television signal, a signal obtained by thinning out the complete group of sampling points which are extracted from the original Hi-vision video signal in accordance with a predetermined rule is transmitted. A video signal processor in a TV set completes sampling points which are thinned out on the transmission side by interpolation. In a conventional video signal processor, since it is necessary to process a signal at a digital portion at a high speed, the circuit must be composed of elements which operate at a high speed. It is also necessary to use a low-pass filter having a sharp cutoff characteristic in the process of cutting off the high-frequency component of the output signal. In the present invention, an input signal is first subjected to time base expansion and the horizontal frequency characteristic is adjusted by the high-pass filter and the band-rejection filter, thereby enabling signal processing at a comparatively low speed. Thus, a predetermined horizontal frequency characteristic is realized by a cheap low-pass filter. A color signal interpolated between fields is produced from the data interpolated between frames by passing the data interpolated between fields through a low-pass filter and a bandpass filter, and adding the respective outputs, thereby removing the vertical line disturbance due to the variation in the clamping level between fields which is a problem remaining unsolved in the related art.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile