| 摘要 |
PROBLEM TO BE SOLVED: To provide a video signal processing apparatus for reducing noise and the cost by not employing a frame buffer and performing resolution conversion processing for image magnification of reduction in real time. SOLUTION: A write control circuit 2 for controlling write to a line buffer circuit 6 when the image resolution of an input video signal Sin is horizontally magnified or reduced in the horizontal direction, a read line buffer selection circuit 3 for selectively controlling a read line buffer for reading data from a write line buffer, a line buffer read control circuit 4 for controlling the read from the line buffer circuit 6 are placed between a horizontal filter circuit 1 for image resolution magnification or reduction and a vertical filter circuit 5, and the read line buffer selection circuit 3 monitors the write line buffer designated by the write control circuit 2 for selectively controlling the read line buffer so as not to read data from the line buffer in a data write operation. COPYRIGHT: (C)2003,JPO
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