| 摘要 |
<p>PURPOSE:To make it possible to reproduce edge parts exactly by separating edge parts in which the level changes abruptly in picture signals exactly and encoding them. CONSTITUTION:Inputted codes are separated to the first code (output code of an information storing type encoder 5) and the second code (output code of an information non-storing type encoder 8) in a separating section 10 accord ing to synchronizing signals. The first code after separation is decoded by an information storing type decoder 11 and quantized output q(i,j) is reproduced, and the second code after separation is decoded by an information non-storing type decoder 13, and quantized residual signals d'(i,j) are reproduced. The infor mation storing type decoder 11 decodes run length code and reproduces run of '0' level and 128 level and reproduces q(i,j). The information non-storing type decoder 13 decodes orthogonal transformation coefficient after quantizing encoded in block unit, and reproduces quantized residual signals d' (j,j) by mak ing reverse orthogonal transformation. Quantized output q(j,j) and quantized residual signals d'(i,j) are added by an adder 14 in block unit and decoded picture signals f(i,j) are formed.</p> |
