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. 17, 1984
Filed:
May. 29, 1981
Victor G Devereux, Cheam, GB;
British Broadcasting Corporation, London, GB;
Abstract
A single field or picture of a PAL color television signal is stored in a store and provides a signal at an input (52). The stored signal consists of 2f.sub.sc samples taken at 45.degree. to the U-axis. The signal is separated by a filter (56) and subtractor (58) into a high frequency or chrominance signal and a low frequency or luminance signal. The chrominance signal is delayed by delay means (62) such that the chrominance components of two lines which are an odd number of lines apart are made available simultaneously. These signals are combined by switches (S1, S2) and/or combining circuits (68) to provide a signal at 4f.sub.sc which is combined with the luminance signal in a combining circuit (70) to provide a 4f.sub.sc output (72). The manner of the combination of the chrominance components is changed on an 8-field cycle. In an alternative arrangement, if the signal is originally stored in a store which provides outputs from more than one line simultaneously, two stored lines can be combined, and the chrominance portion of the thus-combined signal combined with the luminance portion of a stored signal to provide the output.