| 摘要 |
PURPOSE:To apply interpolation without causing deterioration in picture quality even if a picture is moved in various directions by obtaining the total sum of products between an adaptive interpolation coefficient and an interpolation value in each direction and using the total sum as a picture element value to be interpolated. CONSTITUTION:An input picture signal sampled is sequentially stored in frame memories 1, 2, picture element values A, B, C, D among A, B, C, D, E, F used for adaptive interpolation are read from the memory 1, the E is read from the memory 2 and the F is read without being stored in the memory, and inputted to a weight calculation section 3 and an interpolation value calculation section 4. The calculation section calculates weights Pn, Pv and Pt. The calculation section 4 calculates 1/2(A+B), 1/2(C+D) and 1/2(E+F) from input picture element values A-F. After the output of the calculation section 4 is multiplied respectively with the weights Pn, Pv, Pt at multipliers 5, 6, 7, the result is added by adders 8, 9 to form the final adaptive interpolation outputs. |
