Abstract
Coding apparatus, comprising: a signal classification unit (210) configured to determine a coding mode of a low frequency signal of an input signal, based on characteristics of the input signal; a linear prediction coefficient (LPC) encoder (211) configured to extract an LPC from the low frequency signal of the input signal, and to quantify the LPC; a linear prediction encoder with code excitation (CELP) (212) configured to perform a CELP encoding on an LPC excitation signal of a low frequency signal of the input signal extracted using the LPC, when determining that the low frequency signal coding mode of the input signal is a CELP coding mode; an extension encoder in the time domain (213) configured to perform an amplification encoding on a high frequency signal of the input signal, when a CELP encoding is performed on the LPC excitation signal; an audio encoder (214) configured to perform an audio coding on the LPC excitation signal, when it is determined that the low frequency signal coding mode of the input signal is an audio coding mode ; and an amplification encoder in the frequency domain (FD) (215) configured to perform an amplification encoding on the high frequency signal of the input signal, when audio coding is performed on the signal LPC excitation.
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