Motion picture encoding apparatus

A motion picture encoding method that encodes a pixel block upon selecting one of a plurality of intra prediction modes, the motion picture encoding method comprising:

• a step of generating a plurality of quasi-prediction images according to the plurality of intra prediction modes from an input image;
• a step of calculating a plurality of prediction errors of the plurality of prediction images generated by a quasi-prediction image generating unit by giving a weight emphasizing a prediction error in a pixel that could be a reference pixel in an intra prediction of another pixel block and determining a prediction mode on a basis of the plurality of calculated prediction errors;
• a step of generating a prediction image from a reconfigured image in accordance with the determined prediction mode;
• a step of obtaining a difference image by subtracting the prediction image generated from the reconfigured image;
• a step of obtaining a coefficient by Performing orthogonal transformation of the difference image and quantizing the coefficient;
• and
• a step of performing dequantization and inverse orthogonal transformation of the quantized coefficient and updating the reconfigured image on a basis of an image obtained by adding the coefficient to the prediction image generated from the reconfigured image;
• wherein in the step of calculating, the plurality of calculated prediction errors for the pixel block are calculated by a formula:
• SAD
• ′
• =
• ∑
• i
• ⁢
• 
• Input
• ⁡
• (
• i
• )
• -
• Pred
• ⁡
• (
• i
• )
• 
• +
• δ
• ⁢
• ∑
• j
• ⁢
• 
• Input
• ⁡
• (
• j
• )
• -
• Pred
• ⁡
• (
• j
• )
• 
• ,
• wherein SAD′ is prediction errors, Input(i) and Input(j) are pixels of the input image, Pred(i) and Pred(j) are pixels of a quasi-prediction image, i is a suffix for pixels other than a weighting target pixel, j is a suffix for the weighting target pixel, and δ denotes the weight.