| 摘要 |
<p>PURPOSE:To reduce the distortion in a reinforcing signal in a block bridged over a vertical mask section and the reinforced signal when a letter box signal in which the reinforced signal is multiplied to the vertical mask part is block- processed and subject to high efficiency coding. CONSTITUTION:As to 1st to 30th line and 211-240 lines equivalent to a reinforced signal of a vertical mask part, a switch 202 is thrown to the position B to select a reinforced signal outputted from a YC separator circuit 102. As to a main section of 31, 32 lines and 209, 210 lines adjacent to the mask section, the switch 202 is thrown to the position A and a signal 201 set by a reference level generating circuit 200 is selected, Furthermore, as to other lines (34-208 lines) of the main section, the switch 202 is thrown to the position B and a luminance signal 103 is selected. The luminance signal and the color difference signal subject to the processing above are given to a memory 108, in which horizontal 8 picture elements X vertical 8 lines are blocked in the unit of frames.</p> |
