Patent ID: 8862479

Claim:
An encoding device comprising: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute estimating a decoded signal of a plurality of channels based on a down-mix signal obtained by down-mixing an input signal of the plurality of channels, similarity between the channels of the input signal, and an intensity difference between the channels of the input signal; analyzing a phase difference between a signal of one channel of the input signal and a down-mix signal obtained by downmixing the input signal, and a phase difference between a signal of one channel of the decoded signal and a down-mix signal obtained by down-mixing the decoded signal; calculating phase information based on the phase difference between the signal of one channel of the input signal and the down-mix signal obtained by down-mixing the input signal, and the phase difference between the signal of one channel of the decoded signal and the down-signal obtained by down-mixing the decoded signal; and encoding the similarity between the channels of the input signal, the intensity difference between the channels of the input signal, and the phase information.