Encoding device and encoding method

An encoding device that quantizes and codes input signals in which an upper limit of a symbol amount of a binary symbol generated by quantization is specified, comprising:

• a signal processing circuit that processes an input signal in a predetermined method;
• a quantization parameter generating circuit that generates a first quantization parameter;
• a first quantizing circuit that generates first quantized data by quantizing the processed input signal on the basis of the first quantization parameter,
• a first binarizing circuit that binarizes the first quantized data to output first binary symbol data;
• a first arithmetic coding circuit that generates first coded data by arithmetic-coding the first binary symbol data on the basis of a predetermined target code amount;
• a quantization parameter calculating circuit that generates a second quantization parameter on the basis of a symbol amount of the first binary symbol data, a code amount of the first coded data, a second quantization parameter, an upper limit of the symbol amount, and the target code amount;
• a second quantizing circuit that generates second quantized data by quantizing the processed input signal on the basis of the second quantization parameter;
• a second binarizing circuit that binarizes the second quantized data to output second binary symbol data;
• and
• a second arithmetic coding circuit that generates and outputs coded data corresponding to the input signal by arithmetic-coding the second binary symbol data.