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. 16, 1980
Filed:
Apr. 16, 1979
John O Drewery, Coulsdon, GB;
Abstract
In a method of and apparatus for processing 625-line PAL colour television signals, in which in conjunction with each line of the signal there is provided an additional signal for use therewith, the additional signal is formed essentially of the luminance component of a signal equivalent to the signal 625 lines previous to the current line, and the chrominance component of a signal substantially equivalent to the signal 624 lines previous to the current line. Alternatively, the difference of the chrominance components 624 and 626 lines previous may be used. For 525-line N.T.S.C. the luminance component is derived from the signal 525 lines previous, and the chrominance component is the chrominance component of the signal 524 or 526 lines previous to the current line, or an average of these. The form of the chrominance component may be selected automatically in dependence upon vertical chrominance detail.