| 摘要 |
PROBLEM TO BE SOLVED: To autonomously dynamically control a delay amount in the case of abstracting respective sound sources. SOLUTION: In this sound signal processor, a signal abstraction part 4 gives a prescribed delay amount to an observation signals 3b,..., 3v with a parameter control signal 8 representing the assumed delay amount, combines them with an observation signal 3a, and outputs an abstraction signal 5 and a residual signal 6. A mutual information amount optimization part 7 calculates a mutual delay amount for deciding independence between the abstraction signal 5 and the residual signal 6, outputs the parameter control signal 8 with sequentially changing the assumed delay amount on the basis of the calculation result, takes in the abstraction signal 5 and the residual signal 6, and repeatedly calculates the mutual delay amount. Thus, the mutual information amount optimization part 7 searches for a local minimum of the mutual delay amount and outputs the corresponding abstraction signal 5 as a target abstraction signal 9. |
