Patent ID: 7318026
Filing Date: 2008-01-08
Classification: G10L,G11B,H04H,H04S

Abstract:
1. An encoding apparatus, comprising: a difference signal generating portion for forming a difference signal which is the difference between a first channel signal and a second channel signal of an input PCM signal; a time difference encoding process portion for encoding the difference signal and the second channel signal with a time difference; a dividing process portion for dividing an output signal of the time difference encoding process portion in the unit of a predetermined number of bits; an adaptively encoding process portion for adaptively encoding output data of the dividing process portion in the unit of the predetermined number of bits; and an output portion for arranging output data of the adaptively encoding process portion in a predetermined format; wherein the adaptively encoding process portion is configured to compare the code amount of data for which an adaptively encoding process has not been performed with the code amount of data for which an adaptively encoding process has been performed in the unit of the predetermined number of bits and output data whose code amount is smaller, wherein the adaptively encoding process portion includes, a pre-process portion for performing a pre-process with a first reversible code, an encoding process portion for performing an encoding process with a second reversible code corresponding to output data of the pre-process portion, and a comparing portion for comparing the code amount of output data of the encoding process portion with the code amount of input data of the encoding process portion.