Quantization unit setting apparatus, quantization unit setting method, coding apparatus, coding method, and information record medium

摘要

A quantizer scale setting apparatus for setting a quantizer scale used when a digital information signal Sd is quantized has an adder 12 for making a precalculation of a quantization error occurring when the digital information signal Sd is quantized using a plurality of quantizer scales for each of the quantizer scales, and an error control section 10 for setting the quantizer scale used for quantizing the digital information signal Sd from among the plurality of quantizer scales based on the quantization errors whose precalculation is made.