Patent ID: 7630396

Claim:
A multichannel signal decoding equipment, comprising: a demultiplexer that demultiplexes a coded reference signal which is generated from signals of multiple channels, and parameters multiplexed with the coded reference signal that indicate characteristics of each of the signals of the multiple channels; a decoder that decodes the coded reference signal demultiplexed by the demultiplexer; and a generator that generates the signals of the multiple channels from the parameters demultiplexed from the decoded reference signal, the generator comprising: a power spectrum estimator that estimates a first power spectrum for each of the signals of the multiple channels and a second power spectrum for the decoded reference signal based on the parameters; and a multiplication factor calculator that calculates a multiplication factor of the reference signal corresponding to each of the multiple channels and multiplies the reference signal by the calculated multiplication factor to generate the signals of the multiple channels, based on the first power spectrum and the second power spectrum.