Patent ID: 8170359
Filing Date: 2012-05-01
Classification: H03M,H04N

Abstract:
1. 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.