| 摘要 |
PROBLEM TO BE SOLVED: To provide a system which suitably separates a signal from a mixture signal having a correlation signal and is tolerant of disturbance by inversely correlating and deriving an estimated value of a desired signal included in the mixture signal by making many shifts relating to the correlation electric signal of the estimated value. SOLUTION: A speech recognition audio system 5 acquires a message of, for example, a driver by a microphone Ma and converts it into an electric signal Ea. The electric signal Ea is a mixture signal which has disturbance signals Pa and Pb arriving from speakers LSa and LSb. The stereophonic broadcasting signal obtained by the speakers LSa and LSb is a correlation signal obtained on the basis of correlation electric signals CRa and CRb activating the stereophonic signal, i.e., the speakers LSa and LSb. Then the estimated value of the desired signal XL included in the mixture signal is derived by making many shifts relating to the correlation electric signals Ra and CRb of the estimated value. |
