COMPRESSION SIGNAL SWITCHING DEVICE

摘要

PURPOSE: To improve the quality of pictures immediately after editing by shortening switching time. CONSTITUTION: Encoded data A and B are respectively supplied to an A memory 43 and a B memory 44. Refresh valid area detection circuits 45 and 46 detect whether or not it is a refreshed super block. Write/read control circuits 52 and 53 supply addresses for reading the data of a valid block refreshed after an editing point to the A and B memories 43 and 44. Thus, immediately after the editing point, only the data of the valid data are outputted through a switch 59 as the encoded data C.