Patent ID: 8903720

Claim:
An encoding apparatus including a processor integrally encoding a speech signal and an audio signal, the encoding apparatus comprising: an input signal analyzer, of the processor, to analyze a characteristic of an input signal; a stereo encoder to down mix the input signal to a mono signal when the input signal is a stereo signal; a frequency band expander to expand a frequency band of the input signal; a sampling rate converter to convert a sampling rate with respect to an output signal of the frequency band expander to change a frequency band related to a core band of the input signal; a speech signal encoder to encode the core band of the input signal using a speech encoding module when determining the input signal is a speech characteristics signal; an audio signal encoder to encode the core band of the input signal using an audio encoding module when determining the input signal is an audio characteristic signal; and a bitstream generator to generate a bitstream corresponding with an output signal of the speech signal encoder and an output signal of the audio signal encoder, wherein the core band includes a band which is not expanded in a frequency band of the input signal, and wherein when the input signal is changed between the speech characteristic signal and the audio characteristic signal, the bitstream generator stores, in the bitstream, information associated with compensating for a change of a frame unit.