PICTURE DECODER

摘要

PURPOSE: To reduce memories required for a decoding processing and to make a picture decoder low in cost. CONSTITUTION: The inputted encoded data of B pictures are supplied to a variable length decoding circuit 2 through a switch 21, also supplied to the memory 22 and stored. By circuits after the variable length decoding circuit 2, the inputted encoded data of the B pictures are decoded first. Decoded data are switched to the memories 27 and 28 for each block line through the switch 26 and stored and the data of odd numbered fields are read from the memories 27 and 28 in a display order in the first half of the display period of one frame. Decoding is performed also to the encoded data of the B pictures stored in the memory 22 and they are switched to the memories 27 and 28 for each block line and stored. The data of even numbered fields among the data stored in the memories 27 and 28 are read in the display order in the second half of the display period of one frame.