METHOD, DEVICE AND PROGRAM FOR ENCODING IMAGE

摘要

PROBLEM TO BE SOLVED: To prevent generation of a block distortion, and to prevent the deterioration of a decoded image in the encoding system of a block base.

SOLUTION: A code quantity computing section 303 computes the quantity of codes on the basis of an encoded frame signal, a reference frame signal and a quantized parameter. A weighted-distortion quantity computing section 305 computes the quantity of a weighted distortion from the lower-limit value of the quantity of a change according to a mode stored in a mode storage section 302. An undefined multiplier computing section 307 computes an undefined multiplier on the basis of the input encoded frame signal, reference frame signal and quantized parameter. A cost computing section 309 computes a cost on the basis of the quantity of codes, the quantity of weighted distortion and the undefined multiplier. A minimum cost decision section 311 decides the cost as the minimum one. An optimum mode output section 316 outputs the mode in this case as the optimum one when the cost is determined as the minimum one.

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