MOVING IMAGE ENCODER, MOVING IMAGE ENCODING METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To improve subjective picture quality and coding efficiency by setting an adequate quantization parameter used for coding, thereby controlling distortion caused by quantization.

SOLUTION: A first encoding unit 11 generates a bit stream by encoding an input image signal. A decoding unit 12 generates a decoded image signal by decoding the bit stream. An evaluation unit 13 calculates an image quality degradation evaluation indicator from difference between the input image signal and the decoded image signal. A quantization parameter calculation unit 14 calculates a quantization parameter using the image quality degradation evaluation indicator. A second encoding unit 15 encodes the input image signal using the quantization parameter calculated by the quantization parameter calculation unit 14.

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