PURPOSE: To make a time base multiple signal having less-deteriorated picture quality without spreading a frequency zone by utilizing a little of high frequency components in the oblique direction, by zone-compressing a luminance signal, making a space in term of time due to the time base compression, and multiplying the time base-compressed chrominance components in the space.
CONSTITUTION: The first input terminal 1 inputs a wide zone luminance signal, which is quantized into a digital signal. The first adder 15 sums up these signals, which is divided by a half. The difference of these signal is calculated by a subtractor 16. The second and third input terminals 7 and 8 input (R-Y) and (B-Y), respectively, which are stored in the second and third buffer memory 22 and 23, respectively. Among a horizontal scanning period when signals are not written in each memory, a differential component of the luminance signal is read out through the fourth switch 24 in a half of an image signal period during said period, (R-Y) is read out in its one fourth period and (B-Y) is read out in the remaining one fourth period.
SAKAMOTO TOSHIYUKI
SUGIYAMA MASAHITO
OKUDA AKIHIDE
MURATA TOSHINORI
OOSAWA MICHITAKA
