Apparatus and method for converting scan format of video signal

Abstract

An apparatus and a method for converting a scan format of a video signal. The video signal scan format conversion apparatus comprises a multiplexer for converting a plurality of input signals of a raster scan format into a single signal of the same format and successively outputting the converted signal, a FIFO memory unit for sequentially storing successive output signals of the raster scan format from the multiplexer and outputting the stored signals to primarily convert them into those of a vertical scan format, a FIFO controller for generating a write control signal to control a write operation of the FIFO memory unit, a first read address generator for generating read addresses to the FIFO memory unit, a dual port RAM unit for sequentially storing the primarily converted signals from the FIFO memory unit and outputting the stored signals to secondarily convert them into those of the vertical scan format, a write address generator for generating write addresses to the dual port RAM unit, and a second read address generator for generating read addresses to the dual port RAM unit. The input signal of the raster scan format is converted into that of the vertical scan format easy to calculate, thereby reducing the time required in combining pixel values. Therefore, the system can become simple in construction.