VIDEO SIGNAL COMPRESS DEVICE

摘要

A video signal compression apparatus in accordance with a first exemplary embodiment of the present invention takes out a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center part of a picture can be horizontally compressed. A video signal compression apparatus in accordance with a second exemplary embodiment of the present invention uses a FIFO memory which is unnecessary to generate an address. Therefore, the circuit scale can be made small. A video signal compression apparatus in accordance with a third exemplary embodiment of the present invention can select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. A video signal compression apparatus in accordance with a fourth exemplary embodiment of the present invention can change a display position of the picture. <IMAGE>