Video format converting apparatus

摘要

A system which can perform video communications via terminals which can send and receive video and audio signals should convert a video signal format set in each terminal into a common intermediate format (CIF) to then perform encoding and decoding operations. A video format converting apparatus can reduce the size of line memories which are used for video format conversion during converting an image picked up by a charge coupled device (CCD) camera into a CIF image. Thus, the number of line memories used for video format conversion of images can be reduced, thereby providing an effect capable of reducing the size of an integrated circuit of the line memories. The video format converting apparatus can be also applied to convert an NTSC signal as well as the CCD image into the CIF image.