| 摘要 |
PURPOSE:To execute encoding with high efficiency without increasing a distortion quantity by executing variable length enooding with respect to a combination of each component obtained by a sum and difference conversion of an original picture element group and its forecasting conversion. CONSTITUTION:A sum component S0 and a difference component S1 of input picture element groups Uj1, Uj2 of a block Bij are calculated, forecasting error components DELTAS0, DELTAS1 are calculated by a forecasting converter 3, and also they are quantized adaptively. Its quantized forecasting error components DELTAS0, DELTAS1 are brought to variable encoding by an encoder 4, inputted to a buffer memory 5, and in case of an actual time processing, they are read out asynchronously from an input by a prescribed bit rate from the buffer memory 5 at the same time, and sent onto a trasmission line by adding a redundant code which is capable of correcting an error generated on the transmission line. Accordingly, deterioration of a reproducing picture is reduced, considering a high compression rate. |
