Video encoding/decoding apparatus

A video encoding apparatus comprising:

• a predictor to generate a prediction image,
• an orthogonal transformer to generate a transform coefficient by performing orthogonal transform on a prediction error between the prediction image and an input image;
• a quantizer to quantize the transform coefficient;
• a dequantizer to dequantize a quantized transform coefficient;
• an inverse orthogonal transformer to subject a dequantized transform coefficient to inverse orthogonal transform and obtain a local decode residual corresponding to the prediction error;
• an adder to add the local decoded residual and the prediction image to produce a local decoded image;
• a classification module to classify the local decoded image into a plurality of regions using a given parameter;
• a designing module to design a filter coefficient every classified region;
• and
• an encoder to output information of the quantized transform coefficient and the filter coefficient every classified region as encoded data,