| 摘要 |
A coding control section 26 determines a quantization step size 24 and frame skip control information 25 based on a remainder of a buffer 20 and a maximum quantization step size 28 output from a quantization step size change width control section 29. The quantization step size change width control section 27 receives an average quantization step size 29 calculated by the coding control section 26, and determines the maximum quantization step size 28.
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