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:
Feb. 19, 2002
Filed:
Aug. 20, 1999
Takeshi Kishida, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
This invention relates to a video signal processing circuit for easily simultaneously performing conversion of the number of lines and format conversion with a simple construction and an image pickup apparatus such as CCD using the circuit. A signal in a 4:2:2 format is supplied to a linear interpolating unit. Input luminance signals and input color difference signals of one line are written into line memories and the input luminance signals and the input color difference signals of the next one line are written into other memories. Similarly, signals are alternately written. The input luminance signal is read twice from the above memories in a period of writing signals of one line. The obtained signals are multiplied by coefficients for linear interpolation, respectively, and the resultant signals are added, thereby generating a luminance signal to be outputted. At the occasion of reading the input luminance signal twice, the input color difference signal is read once from the above memories and multiplied by each of coefficients, and the resultant signals are added, thereby generating a color difference signal to be outputted. A writing/reading control of a signal to/from memories and setting of the coefficients are performed by an interpolation control unit. Thus, the number of lines can be changed in a real time manner and the signal can be converted into a signal in a 4:2:0 format.