Patent ID: 7978771
Filing Date: 2011-07-12
Classification: G10L

Abstract:
1. An encoding apparatus configured to perform scalable coding on an input signal, the encoding apparatus comprising: a frequency transforming section that down-samples the input signal; a first encoding section that encodes the down-sampled input signal and generates first encoded information; a first decoding section that decodes the first encoded information and generates a first decoded signal; a frequency transforming section that up-samples the first decoded signal; a storing section that stores an impulse response, the impulse response being configured to adjust the up-sampled first decoded signal such that an error between the input signal and the up-sampled first decoded signal is reduced; an adjusting section that adjusts the up-sampled first decoded signal by convolving the up-sampled first decoded signal and the impulse response; a delaying section that delays the input signal in synchronization with the adjusted first decoded signal; an adding section that calculates a residual signal comprising a difference between the delayed input signal and the adjusted first decoded signal; and a second encoding section that encodes the residual signal and generates second encoded information.