Noise shaping quantizer

A noise shaping quantizer having a first noise shaping quantization unit for applying a first noise shaping operation on an input signal. The first noise shaping quantization unit includes a local quantizer that quantizes the input signal and outputs an output signal; an error accumulator that accumulates at least a part of a value based on the output signal based on at least one of a value based on the input signal and the value based on the output signal, outputs the remaining part, and outputs at least a part of the accumulated value based on the output signal based on at least one of a value based on another input signal and a value based on another output signal at a later clock; an adder to which the output signal and the output of the error accumulator are inputted; a subtractor to which the input signal and the output of the adder are inputted; a delay element to which an output of the subtractor is inputted; and another adder that adds an output of the delay element and an input from external, and outputs the sum to the first local quantizer.