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A video encoding method of performing dequantization of a transform coefficient using a quantization matrix of the transform coefficient corresponding to each frequency position includes a quantization matrix generation step of generating a quantization matrix using a generation function used for generation of the quantization matrix and a generation parameter, a quantization step of quantizing the transform coefficient, using the quantization matrix generated, and a step of encoding the quantized transform coefficient to generate a code signal. No. of Pages : 79 No. of Claims : 15