| 摘要 |
<p>PURPOSE:To simply attain line interpolation processing with a small capacity memory and a shift register by converting a signal corresponding to each horizontal scanning line in a unit picture block area and an interpolation signal of an interpolation horizontal scanning line sequentially into data. CONSTITUTION:A line interpolation section 11 is a circuit section implementing interpolation and simultaneous processing to a Y signal, a CR signal and a CB signal from a changeover switch 10, and 8-bit digital data 8 are shifted by a bit shift register and the result is fed to an adder. The adder adds output data and input data from the 8-bit shift register and a 1/2 multiplier multiplies the result of addition by 1/2 to obtain an averaging signal and it is outputted to an H terminal of the changeover switch. Furthermore, the input data are fed to an L terminal of the changeover switch and the supply data to both terminals are switched and outputted to a DCT section 12 based on a switching control signal. Then a signal corresponding to each horizontal scanning line in a unit picture block area an interpolation signal for an interpolated horizontal scanning line are in turn converted into data.</p> |
