Video scanning conversion apparatus

Claim 1

A video signal processing apparatus to which at least one frame of a video signal comprising a plurality of scanning lines is inputted and which is outputs at least one frame of a new video signal comprising a converted number of scanning lines, wherein the apparatus comprises a memory means for memorizing at least one frame of the inputted video signal, an operating means for being operated to input a conversion rate N to convert the number of the scanning lines of said one frame, a controlling means for dividing an ordinal numeral R of the scanning line to be outputted by the conversion rate N and obtaining from the quotient R/N an integral number W, a detecting means for detecting the number of the scanning lines of the inputted video signal and outputting a detecting signal indicative of the detected number to the controlling means, a reading controlling means for controlling the memory means in accordance with outputs of the controlling means so that the scanning line with an ordinal numeral corresponding to the integral number W is read out from the memory means as the outputted scanning line with the ordinal number R.