Patent ID: 8738372

Claim:
A scalable coding apparatus that encodes a voice signal or audio signal separated into a low frequency band and high frequency hand, the scalable coding apparatus comprising: a first coding section that encodes a low frequency band signal of the voice signal or the audio signal; a second coding section that encodes a high frequency band signal of the voice signal or the audio signal; a first spectrum generation section that performs frequency domain conversion of the low frequency band signal and generates a first spectrum of the low frequency band; and a second spectrum generation section that performs frequency domain conversion of the voice signal or the audio signal, and generates a second spectrum including the low frequency band and the high frequency hand, wherein the second coding section comprises: a generation section that calculates an estimated spectrum of the high frequency band of the second spectrum using the first spectrum and estimated pitch information; a search section that searches for pitch information indicating the estimated spectrum having a highest similarity to the high frequency band of the second spectrum; and a coding section that encodes the pitch information indicating the estimated spectrum having the highest similarity, instead of the high frequency hand of the second spectrum.