Patent ID: 7411522

Claim:
A signal decoding apparatus that decodes coded information formed with n layers, n being an integer of two or greater, the signal decoding apparatus comprising: a coded information operation section that performs error detection for the coded information per layer; a decoding section that decodes coded information of a layer where no error is detected and generates a decoded signal; a sampling frequency adjustment section that adjusts a sampling frequency of a signal; and an addition section that adds the decoded signal generated in said decoding section and the signal having the sampling frequency adjusted in said sampling frequency adjustment section, wherein: said sampling frequency adjustment section adjusts sampling frequencies of a decoded signal of a first layer and a signal in which signals of a second to (n−1)th layers are added in said addition section; and said addition section adds a decoded signal of an ith layer, i being an integer not smaller than two and not greater than n, and the signal of the (i−1)th layer with an adjusted sampling frequency.